Science > Physics > Solar Cell functionality : which wavelengths are converted toelectricity ?
| Topic: |
Science > Physics |
| User: |
"blackboab" |
| Date: |
12 Dec 2007 09:30:54 AM |
| Object: |
Solar Cell functionality : which wavelengths are converted toelectricity ? |
I am unsure about which wavelengths a solar cell can convert to
electricity.
Does the cell only convert visible light (400nm to 700nm) or does it
also convert UV and infrared radiation to electricity ?
TIA
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| User: "Androcles" |
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| Title: Re: Solar Cell functionality : which wavelengths are converted to electricity ? |
12 Dec 2007 09:51:41 AM |
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"blackboab" <blackboab@gmail.com> wrote in message
news:e40d6ec4-0f6d-43e3-9fd9-86711b485734@d21g2000prf.googlegroups.com...
:I am unsure about which wavelengths a solar cell can convert to
: electricity.
:
: Does the cell only convert visible light (400nm to 700nm) or does it
: also convert UV and infrared radiation to electricity ?
:
: TIA
That's a little like asking who can ride a bicycle. :-)
http://www.semiconductors.co.uk/eg(algaas).htm
Basically it can be tailor made to suit your requirements.
.
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| User: "blackboab" |
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| Title: Re: Solar Cell functionality : which wavelengths are converted toelectricity ? |
12 Dec 2007 11:20:45 AM |
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On 12 Dec, 20:51, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"blackboab" <blackb...@gmail.com> wrote in message
news:e40d6ec4-0f6d-43e3-9fd9-86711b485734@d21g2000prf.googlegroups.com...
:I am unsure about which wavelengths a solar cell can convert to
: electricity.
:
: Does the cell only convert visible light (400nm to 700nm) or does it
: also convert UV and infrared radiation to electricity ?
:
: TIA
That's a little like asking who can ride a bicycle. :-)
http://www.semiconductors.co.uk/eg(algaas).htm
Basically it can be tailor made to suit your requirements.
thanks. Off topic : why does IR radiation feel very warm to the human
skin but visible light radiation (which has a higher energy) doesn't ?
.
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| User: "Androcles" |
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| Title: Re: Solar Cell functionality : which wavelengths are converted to electricity ? |
12 Dec 2007 11:47:01 AM |
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"blackboab" <blackboab@gmail.com> wrote in message
news:0dc7aa4e-b779-4e39-8bf9-b2d213af5966@d27g2000prf.googlegroups.com...
: On 12 Dec, 20:51, "Androcles" <Engin...@hogwarts.physics_a> wrote:
: > "blackboab" <blackb...@gmail.com> wrote in message
: >
: >
news:e40d6ec4-0f6d-43e3-9fd9-86711b485734@d21g2000prf.googlegroups.com...
: > :I am unsure about which wavelengths a solar cell can convert to
: > : electricity.
: > :
: > : Does the cell only convert visible light (400nm to 700nm) or does it
: > : also convert UV and infrared radiation to electricity ?
: > :
: > : TIA
: >
: > That's a little like asking who can ride a bicycle. :-)
: >
: > http://www.semiconductors.co.uk/eg(algaas).htm
: >
: > Basically it can be tailor made to suit your requirements.
:
: thanks. Off topic : why does IR radiation feel very warm to the human
: skin but visible light radiation (which has a higher energy) doesn't ?
:
It's a trade off between quantity and quality.
A needle jet of water at 10,000 PSI will cut carpet (the auto industry
does it that way for trimming car carpets) but the Hoover dam
will only give it a soaking. Similarly x-rays go right through your
body, but IR is absorbed like a carpet absorbs water.
A tiny laser running at a few milliwatts can be used to "burn" a
DVD or CD leaving a written message, your kitchen cooker
will melt the plastic and distort the entire disc with 750 watts.
In other words the TOTAL IR is greater than the total visible,
but individual photons in the visible have more sting than
IR photons.
.
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| User: "blackboab" |
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| Title: Re: Solar Cell functionality : which wavelengths are converted toelectricity ? |
12 Dec 2007 09:29:07 PM |
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On 12 Dec, 22:47, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"blackboab" <blackb...@gmail.com> wrote in message
news:0dc7aa4e-b779-4e39-8bf9-b2d213af5966@d27g2000prf.googlegroups.com...
: On 12 Dec, 20:51, "Androcles" <Engin...@hogwarts.physics_a> wrote:
: > "blackboab" <blackb...@gmail.com> wrote in message
: >
: >news:e40d6ec4-0f6d-43e3-9fd9-86711b485734@d21g2000prf.googlegroups.com...
: > :I am unsure about which wavelengths a solar cell can convert to
: > : electricity.
: > :
: > : Does the cell only convert visible light (400nm to 700nm) or does it
: > : also convert UV and infrared radiation to electricity ?
: > :
: > : TIA
: >
: > That's a little like asking who can ride a bicycle. :-)
: >
: > http://www.semiconductors.co.uk/eg(algaas).htm
: >
: > Basically it can be tailor made to suit your requirements.
:
: thanks. Off topic : why does IR radiation feel very warm to the human
: skin but visible light radiation (which has a higher energy) doesn't ?
:
It's a trade off between quantity and quality.
A needle jet of water at 10,000 PSI will cut carpet (the auto industry
does it that way for trimming car carpets) but the Hoover dam
will only give it a soaking. Similarly x-rays go right through your
body, but IR is absorbed like a carpet absorbs water.
A tiny laser running at a few milliwatts can be used to "burn" a
DVD or CD leaving a written message, your kitchen cooker
will melt the plastic and distort the entire disc with 750 watts.
In other words the TOTAL IR is greater than the total visible,
but individual photons in the visible have more sting than
IR photons.
So it's just a question of there being more IR ? There is no question
of resonant frequency ?
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| User: "Androcles" |
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| Title: Re: Solar Cell functionality : which wavelengths are converted to electricity ? |
12 Dec 2007 11:30:10 PM |
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"blackboab" <blackboab@gmail.com> wrote in message
news:daa358b0-d428-4dec-8120-677202ba10b6@e23g2000prf.googlegroups.com...
: On 12 Dec, 22:47, "Androcles" <Engin...@hogwarts.physics_a> wrote:
: > "blackboab" <blackb...@gmail.com> wrote in message
: >
: >
news:0dc7aa4e-b779-4e39-8bf9-b2d213af5966@d27g2000prf.googlegroups.com...
: > : On 12 Dec, 20:51, "Androcles" <Engin...@hogwarts.physics_a> wrote:
: > : > "blackboab" <blackb...@gmail.com> wrote in message
: > : >
: > :
news:e40d6ec4-0f6d-43e3-9fd9-86711b485734@d21g2000prf.googlegroups.com...
: > : > :I am unsure about which wavelengths a solar cell can convert to
: > : > : electricity.
: > : > :
: > : > : Does the cell only convert visible light (400nm to 700nm) or does
it
: > : > : also convert UV and infrared radiation to electricity ?
: > : > :
: > : > : TIA
: > : >
: > : > That's a little like asking who can ride a bicycle. :-)
: > : >
: > : > http://www.semiconductors.co.uk/eg(algaas).htm
: > : >
: > : > Basically it can be tailor made to suit your requirements.
: > :
: > : thanks. Off topic : why does IR radiation feel very warm to the human
: > : skin but visible light radiation (which has a higher energy) doesn't ?
: > :
: > It's a trade off between quantity and quality.
: > A needle jet of water at 10,000 PSI will cut carpet (the auto industry
: > does it that way for trimming car carpets) but the Hoover dam
: > will only give it a soaking. Similarly x-rays go right through your
: > body, but IR is absorbed like a carpet absorbs water.
: > A tiny laser running at a few milliwatts can be used to "burn" a
: > DVD or CD leaving a written message, your kitchen cooker
: > will melt the plastic and distort the entire disc with 750 watts.
: > In other words the TOTAL IR is greater than the total visible,
: > but individual photons in the visible have more sting than
: > IR photons.
:
: So it's just a question of there being more IR ? There is no question
: of resonant frequency ?
You might find some resonance in the rods and cones of the retina
allowing you to see with the tiny amounts of light that enter your
eye, but I don't recommend you stare directly at the sun for an
hour or two the same way you expose your skin to get a tan.
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| User: "Benj" |
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| Title: Re: Solar Cell functionality : which wavelengths are converted toelectricity ? |
13 Dec 2007 12:11:34 AM |
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On Dec 12, 10:30 am, blackboab <blackb...@gmail.com> wrote:
I am unsure about which wavelengths a solar cell can convert to
electricity.
Does the cell only convert visible light (400nm to 700nm) or does it
also convert UV and infrared radiation to electricity ?
Anyone notice what a complete moron Andro is? That guy absolutely
NEVER answers a question except with data that fits some OTHER
question. I suppose he THINKS he can answer that other question
better, but the truth is he can't answer ANY questions!
Moron.
---------------
OK. First off you need to define "solar cell" more carefully. I will
assume you are talking about the standard silicon diode solar panels
you find for charging batteries and running roadside equipment. If you
are talking about exotic III-V compounds then I'll return you to
Andro's Svengali-like spell.
Generally speaking these silicon cells are pretty much limited to
visible and near infrared light. The infrared cut-off is determined by
the wavelength at which silicon becomes transparent to infrared. In
other words the cell quits because the light is going right through
it! Therefore you won't find much activity below 1 or 2 microns
(1000-2000 nm). On the UV side there is the problem of UV absorption
in glass and the silicon. Since the light has to penetrate both the
silicon and the silicon oxide layer that covers the diode because to
generate current the light has to create carriers inside the diode in
the depletion region. Also large commercial cells arrays are often
covered with a glass sheet for protection from weather. This also
limits the UV range to that which glass permits. Silicon cell diodes
can be constructed with special techniques to improve the UV
sensitivity but generally it falls off quite rapidly as wavelength
goes into the UV. Since the usual idea with solar cells is to get a
lot of area at low cost, exotic manufacturing techniques tend not to
be used. 86% of the terrestrial cell market are first generation
silicon technology (as I described above). The exotic later
generation stuff tends to be in development or used by NASA etc. where
cost is no object. OK?
Here, educate yourself:
http://en.wikipedia.org/wiki/Solar_cell
Cripes! I can't believe that only Andro was enough of a physicist to
even TRY to produce an answer to this question!
You guys should be ashamed of yourselves!
.
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| User: "blackboab" |
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| Title: Re: Solar Cell functionality : which wavelengths are converted toelectricity ? |
13 Dec 2007 06:16:50 AM |
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Here, educate yourself:http://en.wikipedia.org/wiki/Solar_cell
from the above wiki
"The power output of a solar array is measured in watts or kilowatts.
In order to calculate the typical energy needs of the application, a
measurement in watt-hours, kilowatt-hours or kilowatt-hours per day is
often used. A rule of thumb commonly used is that peak power times 20%
gives average power, equating to one kW peak producing 4.8 kW=B7h per
day."
can someone explain these figures ? 20 per cent of 1000Watts is 200
Watts,
For a 5 hour solar day that is only 1KWh per day.
He multiplied by 24 (hours) , is there a good reason for this
calculation ?
.
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| User: "Androcles" |
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| Title: Re: Solar Cell functionality : which wavelengths are converted to electricity ? |
13 Dec 2007 08:13:06 AM |
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"blackboab" <blackboab@gmail.com> wrote in message
news:0e952a78-da71-4e7c-ac2f-740a2ae19d5a@d27g2000prf.googlegroups.com...
Here, educate yourself:http://en.wikipedia.org/wiki/Solar_cell
from the above wiki
"The power output of a solar array is measured in watts or kilowatts.
In order to calculate the typical energy needs of the application, a
measurement in watt-hours, kilowatt-hours or kilowatt-hours per day is
often used. A rule of thumb commonly used is that peak power times 20%
gives average power, equating to one kW peak producing 4.8 kW·h per
day."
can someone explain these figures ? 20 per cent of 1000Watts is 200
Watts,
For a 5 hour solar day that is only 1KWh per day.
He multiplied by 24 (hours) , is there a good reason for this
calculation ?
Lies,_damned_lies,_and_statistics
Beware wackypedia, anyone can write it and there is nobody
to police it but majority opinion. Nature is not a democracy,
she is a dictatorship. Majority opinions are notoriously wrong
and have been since virgin births came into vogue or Ptolemy's
universe was centred on the Earth.
Also beware averages. The average lifespan of a car is 3000 hours
not including the 100,000 hours it spends sitting in parking lots all
day while you are at work or at the kerbside all night while you
sleep. A Rolls-Royce RB211 jet engine that can clock up 20,000
hours is considered remarkable, no automobile engine can get
close to that. Measured in passenger hours, flight is the safest way
to travel, making the space shuttle and the ISS the safest vehicles
on Earth.
http://en.wikipedia.org/wiki/Lies,_damned_lies,_and_statistics
.
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| User: "Richard Tobin" |
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| Title: Re: Solar Cell functionality : which wavelengths are converted to electricity ? |
13 Dec 2007 08:20:42 AM |
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In article <S5b8j.3534$036.1884@fe1.news.blueyonder.co.uk>,
Androcles <Engineer@hogwarts.physics_a> wrote:
Beware wackypedia, anyone can write it and there is nobody
to police it but majority opinion.
Beware Usenet. It's full of idiots.
-- Richard
--
:wq
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| User: "Androcles" |
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| Title: Re: Solar Cell functionality : which wavelengths are converted to electricity ? |
13 Dec 2007 09:28:16 AM |
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"Richard Tobin" <richard@cogsci.ed.ac.uk> wrote in message
news:fjrf3q$jk8$1@pc-news.cogsci.ed.ac.uk...
: In article <S5b8j.3534$036.1884@fe1.news.blueyonder.co.uk>,
: Androcles <Engineer@hogwarts.physics_a> wrote:
:
: >Beware wackypedia, anyone can write it and there is nobody
: >to police it but majority opinion.
:
: Beware Usenet. It's full of idiots.
As you so ably demonstrate.
.
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| User: "blackboab" |
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| Title: Re: Solar Cell functionality : which wavelengths are converted toelectricity ? |
13 Dec 2007 08:31:07 AM |
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On 13 Dec, 19:13, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"blackboab" <blackb...@gmail.com> wrote in message
news:0e952a78-da71-4e7c-ac2f-740a2ae19d5a@d27g2000prf.googlegroups.com...
Here, educate yourself:http://en.wikipedia.org/wiki/Solar_cell
from the above wiki
"The power output of a solar array is measured in watts or kilowatts.
In order to calculate the typical energy needs of the application, a
measurement in watt-hours, kilowatt-hours or kilowatt-hours per day is
often used. A rule of thumb commonly used is that peak power times 20%
gives average power, equating to one kW peak producing 4.8 kW=B7h per
day."
can someone explain these figures ? 20 per cent of 1000Watts is 200
Watts,
For a 5 hour solar day that is only 1KWh per day.
He multiplied by 24 (hours) , is there a good reason for this
calculation ?
Lies,_damned_lies,_and_statistics
Beware wackypedia, anyone can write it and there is nobody
to police it but majority opinion. Nature is not a democracy,
she is a dictatorship. Majority opinions are notoriously wrong
and have been since virgin births came into vogue or Ptolemy's
universe was centred on the Earth.
Also beware averages. The average lifespan of a car is 3000 hours
not including the 100,000 hours it spends sitting in parking lots all
day while you are at work or at the kerbside all night while you
sleep. A Rolls-Royce RB211 jet engine that can clock up 20,000
hours is considered remarkable, no automobile engine can get
close to that. Measured in passenger hours, flight is the safest way
to travel, making the space shuttle and the ISS the safest vehicles
on Earth.
http://en.wikipedia.org/wiki/Lies,_damned_lies,_and_statistics
Yes but what happens if the engine fails at 30,000 feet ?
At least if an engine fails on a bus the driver stops the bus and
waits for the replacement bus to arrive.
There is NO such luxury with an aeroplane.
.
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| User: "Androcles" |
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| Title: Re: Solar Cell functionality : which wavelengths are converted to electricity ? |
13 Dec 2007 09:58:17 AM |
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"blackboab" <blackboab@gmail.com> wrote in message
news:9d66283f-3aa8-4b6b-962c-cfce295f2c05@s8g2000prg.googlegroups.com...
On 13 Dec, 19:13, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"blackboab" <blackb...@gmail.com> wrote in message
news:0e952a78-da71-4e7c-ac2f-740a2ae19d5a@d27g2000prf.googlegroups.com...
Here, educate yourself:http://en.wikipedia.org/wiki/Solar_cell
from the above wiki
"The power output of a solar array is measured in watts or kilowatts.
In order to calculate the typical energy needs of the application, a
measurement in watt-hours, kilowatt-hours or kilowatt-hours per day is
often used. A rule of thumb commonly used is that peak power times 20%
gives average power, equating to one kW peak producing 4.8 kW·h per
day."
can someone explain these figures ? 20 per cent of 1000Watts is 200
Watts,
For a 5 hour solar day that is only 1KWh per day.
He multiplied by 24 (hours) , is there a good reason for this
calculation ?
Lies,_damned_lies,_and_statistics
Beware wackypedia, anyone can write it and there is nobody
to police it but majority opinion. Nature is not a democracy,
she is a dictatorship. Majority opinions are notoriously wrong
and have been since virgin births came into vogue or Ptolemy's
universe was centred on the Earth.
Also beware averages. The average lifespan of a car is 3000 hours
not including the 100,000 hours it spends sitting in parking lots all
day while you are at work or at the kerbside all night while you
sleep. A Rolls-Royce RB211 jet engine that can clock up 20,000
hours is considered remarkable, no automobile engine can get
close to that. Measured in passenger hours, flight is the safest way
to travel, making the space shuttle and the ISS the safest vehicles
on Earth.
http://en.wikipedia.org/wiki/Lies,_damned_lies,_and_statistics
Yes but what happens if the engine fails at 30,000 feet ?
At least if an engine fails on a bus the driver stops the bus and
waits for the replacement bus to arrive.
There is NO such luxury with an aeroplane.
Ah, but there is. The plane has the luxury of flying on using the
other three engines. Buses only have one, luxurious passenger
ships have the luxury of two. Luxurious Titanic had four but
only one iceberg that it didn't want. Then you lose, Nature doesn't
care if you live or die.
Incidentally, returning to electronic devices and frequency/wavelength,
TV remote controls commonplace in most homes today use
IR in preference to visible light. After all, who wants the kids
waving a beam around they can see and changing channels on
you? Ok, so it's not a device for obtaining power, but the technology
was chosen that way deliberately.
.
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| User: "Randy Poe" |
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| Title: Re: Solar Cell functionality : which wavelengths are converted toelectricity ? |
13 Dec 2007 09:39:10 AM |
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On Dec 13, 9:31 am, blackboab <blackb...@gmail.com> wrote:
On 13 Dec, 19:13, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"blackboab" <blackb...@gmail.com> wrote in message
news:0e952a78-da71-4e7c-ac2f-740a2ae19d5a@d27g2000prf.googlegroups.com...=
Here, educate yourself:http://en.wikipedia.org/wiki/Solar_cell
from the above wiki
"The power output of a solar array is measured in watts or kilowatts.
In order to calculate the typical energy needs of the application, a
measurement in watt-hours, kilowatt-hours or kilowatt-hours per day is
often used. A rule of thumb commonly used is that peak power times 20%
gives average power, equating to one kW peak producing 4.8 kW=B7h per
day."
can someone explain these figures ? 20 per cent of 1000Watts is 200
Watts,
For a 5 hour solar day that is only 1KWh per day.
He multiplied by 24 (hours) , is there a good reason for this
calculation ?
Lies,_damned_lies,_and_statistics
Beware wackypedia, anyone can write it and there is nobody
to police it but majority opinion. Nature is not a democracy,
she is a dictatorship. Majority opinions are notoriously wrong
and have been since virgin births came into vogue or Ptolemy's
universe was centred on the Earth.
Also beware averages. The average lifespan of a car is 3000 hours
not including the 100,000 hours it spends sitting in parking lots all
day while you are at work or at the kerbside all night while you
sleep. A Rolls-Royce RB211 jet engine that can clock up 20,000
hours is considered remarkable, no automobile engine can get
close to that. Measured in passenger hours, flight is the safest way
to travel, making the space shuttle and the ISS the safest vehicles
on Earth.
http://en.wikipedia.org/wiki/Lies,_damned_lies,_and_statistics
Yes but what happens if the engine fails at 30,000 feet ?
The "Gimli Glider" happens.
http://www.wadenelson.com/gimli.html
http://www.casa.gov.au/fsa/2003/jul/22-27.pdf
- Randy
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| User: "Androcles" |
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| Title: Re: Solar Cell functionality : which wavelengths are converted to electricity ? |
13 Dec 2007 10:26:00 AM |
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"Randy Poe" <poespam-trap@yahoo.com> wrote in message
news:7b04f1ec-623c-46e6-a1f9-e3a205165074@s8g2000prg.googlegroups.com...
On Dec 13, 9:31 am, blackboab <blackb...@gmail.com> wrote:
On 13 Dec, 19:13, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"blackboab" <blackb...@gmail.com> wrote in message
news:0e952a78-da71-4e7c-ac2f-740a2ae19d5a@d27g2000prf.googlegroups.com...
Here, educate yourself:http://en.wikipedia.org/wiki/Solar_cell
from the above wiki
"The power output of a solar array is measured in watts or kilowatts.
In order to calculate the typical energy needs of the application, a
measurement in watt-hours, kilowatt-hours or kilowatt-hours per day is
often used. A rule of thumb commonly used is that peak power times 20%
gives average power, equating to one kW peak producing 4.8 kW·h per
day."
can someone explain these figures ? 20 per cent of 1000Watts is 200
Watts,
For a 5 hour solar day that is only 1KWh per day.
He multiplied by 24 (hours) , is there a good reason for this
calculation ?
Lies,_damned_lies,_and_statistics
Beware wackypedia, anyone can write it and there is nobody
to police it but majority opinion. Nature is not a democracy,
she is a dictatorship. Majority opinions are notoriously wrong
and have been since virgin births came into vogue or Ptolemy's
universe was centred on the Earth.
Also beware averages. The average lifespan of a car is 3000 hours
not including the 100,000 hours it spends sitting in parking lots all
day while you are at work or at the kerbside all night while you
sleep. A Rolls-Royce RB211 jet engine that can clock up 20,000
hours is considered remarkable, no automobile engine can get
close to that. Measured in passenger hours, flight is the safest way
to travel, making the space shuttle and the ISS the safest vehicles
on Earth.
http://en.wikipedia.org/wiki/Lies,_damned_lies,_and_statistics
Yes but what happens if the engine fails at 30,000 feet ?
The "Gimli Glider" happens.
Hey Poe!
Explain how to distinguish velocity from closing rate for me,
I didn't find any mention of closing rate in Einstein's crackpottery.
.
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| User: "Randy Poe" |
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| Title: Re: Solar Cell functionality : which wavelengths are converted toelectricity ? |
13 Dec 2007 10:46:11 AM |
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On Dec 13, 11:26 am, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:7b04f1ec-623c-46e6-a1f9-e3a205165074@s8g2000prg.googlegroups.com...
On Dec 13, 9:31 am, blackboab <blackb...@gmail.com> wrote:
On 13 Dec, 19:13, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"blackboab" <blackb...@gmail.com> wrote in message
news:0e952a78-da71-4e7c-ac2f-740a2ae19d5a@d27g2000prf.googlegroups.com.=
...
Here, educate yourself:http://en.wikipedia.org/wiki/Solar_cell
from the above wiki
"The power output of a solar array is measured in watts or kilowatts.
In order to calculate the typical energy needs of the application, a
measurement in watt-hours, kilowatt-hours or kilowatt-hours per day is=
often used. A rule of thumb commonly used is that peak power times 20%=
gives average power, equating to one kW peak producing 4.8 kW=B7h per
day."
can someone explain these figures ? 20 per cent of 1000Watts is 200
Watts,
For a 5 hour solar day that is only 1KWh per day.
He multiplied by 24 (hours) , is there a good reason for this
calculation ?
Lies,_damned_lies,_and_statistics
Beware wackypedia, anyone can write it and there is nobody
to police it but majority opinion. Nature is not a democracy,
she is a dictatorship. Majority opinions are notoriously wrong
and have been since virgin births came into vogue or Ptolemy's
universe was centred on the Earth.
Also beware averages. The average lifespan of a car is 3000 hours
not including the 100,000 hours it spends sitting in parking lots all
day while you are at work or at the kerbside all night while you
sleep. A Rolls-Royce RB211 jet engine that can clock up 20,000
hours is considered remarkable, no automobile engine can get
close to that. Measured in passenger hours, flight is the safest way
to travel, making the space shuttle and the ISS the safest vehicles
on Earth.
http://en.wikipedia.org/wiki/Lies,_damned_lies,_and_statistics
Yes but what happens if the engine fails at 30,000 feet ?
The "Gimli Glider" happens.
Hey Poe!
Explain how to distinguish velocity from closing rate for me,
But Androcles, I did that already. It's not my fault you
snipped the entire response and then acted like I
never wrote it.
I didn't find any mention of closing rate in Einstein's crackpottery.
It's not my fault that you clipped the quote where I showed
you Einstein describing the concept.
You aren't making the idiotic claim that somebody has
to use the exact phrase to be talking about the same
concept, are you?
- Randy
.
|
|
|
| User: "Androcles" |
|
| Title: Re: Solar Cell functionality : which wavelengths are converted to electricity ? |
13 Dec 2007 11:19:36 AM |
|
|
"Randy Poe" <poespam-trap@yahoo.com> wrote in message
news:00bc5ae8-65c4-4dca-b323-e85504420db7@d27g2000prf.googlegroups.com...
On Dec 13, 11:26 am, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:7b04f1ec-623c-46e6-a1f9-e3a205165074@s8g2000prg.googlegroups.com...
On Dec 13, 9:31 am, blackboab <blackb...@gmail.com> wrote:
On 13 Dec, 19:13, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"blackboab" <blackb...@gmail.com> wrote in message
news:0e952a78-da71-4e7c-ac2f-740a2ae19d5a@d27g2000prf.googlegroups.com...
Here, educate yourself:http://en.wikipedia.org/wiki/Solar_cell
from the above wiki
"The power output of a solar array is measured in watts or kilowatts.
In order to calculate the typical energy needs of the application, a
measurement in watt-hours, kilowatt-hours or kilowatt-hours per day is
often used. A rule of thumb commonly used is that peak power times 20%
gives average power, equating to one kW peak producing 4.8 kW·h per
day."
can someone explain these figures ? 20 per cent of 1000Watts is 200
Watts,
For a 5 hour solar day that is only 1KWh per day.
He multiplied by 24 (hours) , is there a good reason for this
calculation ?
Lies,_damned_lies,_and_statistics
Beware wackypedia, anyone can write it and there is nobody
to police it but majority opinion. Nature is not a democracy,
she is a dictatorship. Majority opinions are notoriously wrong
and have been since virgin births came into vogue or Ptolemy's
universe was centred on the Earth.
Also beware averages. The average lifespan of a car is 3000 hours
not including the 100,000 hours it spends sitting in parking lots all
day while you are at work or at the kerbside all night while you
sleep. A Rolls-Royce RB211 jet engine that can clock up 20,000
hours is considered remarkable, no automobile engine can get
close to that. Measured in passenger hours, flight is the safest way
to travel, making the space shuttle and the ISS the safest vehicles
on Earth.
http://en.wikipedia.org/wiki/Lies,_damned_lies,_and_statistics
Yes but what happens if the engine fails at 30,000 feet ?
The "Gimli Glider" happens.
Hey Poe!
Explain how to distinguish velocity from closing rate for me,
But Androcles, I did that already.
No you didn't, Poe, you failed to respond to my questions. How can I
learn if you don't answer?
: > : > Hey Poe!
: > : > Explain how to distinguish velocity from closing rate for me,
: > : > I didn't find any mention of closing rate in Einstein's
crackpottery.
: > :
: > : Velocity: You measure the position vector x of an
: > : object in your coordinate frame at different times.
: > : The velocity is dx/dt, where t is the time as
: > : measured in your frame.
: > :
: > Oh, so c+w is a velocity, then, w being for the car and c+w
: > the velocity of the car's light. blue shifted, c being for the
: > guy waving his flashlight (no shift).
:
: Thanks for confirming what I said.
You are welcome.
No mention of "closing rate", though, you snipped that.
Explain how to distinguish velocity from closing rate for me,
I didn't find any mention of closing rate in Einstein's crackpottery.
: You are unable to
: keep the distinction straight.
You are one those trolls that cannot distinguish object two
from a single observer.
Try again.
Explain how to distinguish velocity from closing rate for me,
I didn't find any mention of closing rate in Einstein's crackpottery.
.
|
|
|
| User: "Randy Poe" |
|
| Title: Re: Solar Cell functionality : which wavelengths are converted toelectricity ? |
13 Dec 2007 11:32:19 AM |
|
|
On Dec 13, 12:19 pm, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:00bc5ae8-65c4-4dca-b323-e85504420db7@d27g2000prf.googlegroups.com...
On Dec 13, 11:26 am, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:7b04f1ec-623c-46e6-a1f9-e3a205165074@s8g2000prg.googlegroups.com...
On Dec 13, 9:31 am, blackboab <blackb...@gmail.com> wrote:
On 13 Dec, 19:13, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"blackboab" <blackb...@gmail.com> wrote in message
news:0e952a78-da71-4e7c-ac2f-740a2ae19d5a@d27g2000prf.googlegroups.co=
m...
Here, educate yourself:http://en.wikipedia.org/wiki/Solar_cell
from the above wiki
"The power output of a solar array is measured in watts or kilowatts=
..
In order to calculate the typical energy needs of the application, a=
measurement in watt-hours, kilowatt-hours or kilowatt-hours per day =
is
often used. A rule of thumb commonly used is that peak power times 2=
0%
gives average power, equating to one kW peak producing 4.8 kW=B7h pe=
r
day."
can someone explain these figures ? 20 per cent of 1000Watts is 200
Watts,
For a 5 hour solar day that is only 1KWh per day.
He multiplied by 24 (hours) , is there a good reason for this
calculation ?
Lies,_damned_lies,_and_statistics
Beware wackypedia, anyone can write it and there is nobody
to police it but majority opinion. Nature is not a democracy,
she is a dictatorship. Majority opinions are notoriously wrong
and have been since virgin births came into vogue or Ptolemy's
universe was centred on the Earth.
Also beware averages. The average lifespan of a car is 3000 hours
not including the 100,000 hours it spends sitting in parking lots al=
l
day while you are at work or at the kerbside all night while you
sleep. A Rolls-Royce RB211 jet engine that can clock up 20,000
hours is considered remarkable, no automobile engine can get
close to that. Measured in passenger hours, flight is the safest way=
to travel, making the space shuttle and the ISS the safest vehicles
on Earth.
http://en.wikipedia.org/wiki/Lies,_damned_lies,_and_statistics
Yes but what happens if the engine fails at 30,000 feet ?
The "Gimli Glider" happens.
Hey Poe!
Explain how to distinguish velocity from closing rate for me,
But Androcles, I did that already.
No you didn't, Poe,
Why, yes, I did. But since you ask so nicely and sincerely,
I'll post a link to my response where I told you how to
distinguish them:
http://groups.google.com/group/sci.physics.relativity/browse_thread/thread/e=
03d2a1ced9c031e/012f4f717f718e97
The key paragraph begins "How to distinguish..."
- Randy
.
|
|
|
| User: "Androcles" |
|
| Title: Re: Solar Cell functionality : which wavelengths are converted to electricity ? |
13 Dec 2007 11:42:52 AM |
|
|
"Randy Poe" <poespam-trap@yahoo.com> wrote in message
news:25f40d8c-34a8-416a-b267-14a87653b0e2@b40g2000prf.googlegroups.com...
On Dec 13, 12:19 pm, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:00bc5ae8-65c4-4dca-b323-e85504420db7@d27g2000prf.googlegroups.com...
On Dec 13, 11:26 am, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:7b04f1ec-623c-46e6-a1f9-e3a205165074@s8g2000prg.googlegroups.com...
On Dec 13, 9:31 am, blackboab <blackb...@gmail.com> wrote:
On 13 Dec, 19:13, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"blackboab" <blackb...@gmail.com> wrote in message
news:0e952a78-da71-4e7c-ac2f-740a2ae19d5a@d27g2000prf.googlegroups.com...
Here, educate yourself:http://en.wikipedia.org/wiki/Solar_cell
from the above wiki
"The power output of a solar array is measured in watts or
kilowatts.
In order to calculate the typical energy needs of the application, a
measurement in watt-hours, kilowatt-hours or kilowatt-hours per day
is
often used. A rule of thumb commonly used is that peak power times
20%
gives average power, equating to one kW peak producing 4.8 kW·h per
day."
can someone explain these figures ? 20 per cent of 1000Watts is 200
Watts,
For a 5 hour solar day that is only 1KWh per day.
He multiplied by 24 (hours) , is there a good reason for this
calculation ?
Lies,_damned_lies,_and_statistics
Beware wackypedia, anyone can write it and there is nobody
to police it but majority opinion. Nature is not a democracy,
she is a dictatorship. Majority opinions are notoriously wrong
and have been since virgin births came into vogue or Ptolemy's
universe was centred on the Earth.
Also beware averages. The average lifespan of a car is 3000 hours
not including the 100,000 hours it spends sitting in parking lots
all
day while you are at work or at the kerbside all night while you
sleep. A Rolls-Royce RB211 jet engine that can clock up 20,000
hours is considered remarkable, no automobile engine can get
close to that. Measured in passenger hours, flight is the safest way
to travel, making the space shuttle and the ISS the safest vehicles
on Earth.
http://en.wikipedia.org/wiki/Lies,_damned_lies,_and_statistics
Yes but what happens if the engine fails at 30,000 feet ?
The "Gimli Glider" happens.
Hey Poe!
Explain how to distinguish velocity from closing rate for me,
But Androcles, I did that already.
No you didn't, Poe,
Why, yes, I did.
Why no, you didn't, Poe.
Perhaps blackboab would like to know how to distinguish
a closing rate from a velocity, I wouldn't want to confuse
him with some crap about object two being an observer
from a troll like you.
.
|
|
|
| User: "Randy Poe" |
|
| Title: Re: Solar Cell functionality : which wavelengths are converted toelectricity ? |
13 Dec 2007 02:23:14 PM |
|
|
On Dec 13, 12:42 pm, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:25f40d8c-34a8-416a-b267-14a87653b0e2@b40g2000prf.googlegroups.com...
On Dec 13, 12:19 pm, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:00bc5ae8-65c4-4dca-b323-e85504420db7@d27g2000prf.googlegroups.com...=
On Dec 13, 11:26 am, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:7b04f1ec-623c-46e6-a1f9-e3a205165074@s8g2000prg.googlegroups.com..=
..
On Dec 13, 9:31 am, blackboab <blackb...@gmail.com> wrote:
On 13 Dec, 19:13, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"blackboab" <blackb...@gmail.com> wrote in message
news:0e952a78-da71-4e7c-ac2f-740a2ae19d5a@d27g2000prf.googlegroups.=
com...
Here, educate yourself:http://en.wikipedia.org/wiki/Solar_cell
from the above wiki
"The power output of a solar array is measured in watts or
kilowatts.
In order to calculate the typical energy needs of the application,=
a
measurement in watt-hours, kilowatt-hours or kilowatt-hours per da=
y
is
often used. A rule of thumb commonly used is that peak power times=
20%
gives average power, equating to one kW peak producing 4.8 kW=B7h =
per
day."
can someone explain these figures ? 20 per cent of 1000Watts is 20=
0
Watts,
For a 5 hour solar day that is only 1KWh per day.
He multiplied by 24 (hours) , is there a good reason for this
calculation ?
Lies,_damned_lies,_and_statistics
Beware wackypedia, anyone can write it and there is nobody
to police it but majority opinion. Nature is not a democracy,
she is a dictatorship. Majority opinions are notoriously wrong
and have been since virgin births came into vogue or Ptolemy's
universe was centred on the Earth.
Also beware averages. The average lifespan of a car is 3000 hours
not including the 100,000 hours it spends sitting in parking lots
all
day while you are at work or at the kerbside all night while you
sleep. A Rolls-Royce RB211 jet engine that can clock up 20,000
hours is considered remarkable, no automobile engine can get
close to that. Measured in passenger hours, flight is the safest w=
ay
to travel, making the space shuttle and the ISS the safest vehicle=
s
on Earth.
http://en.wikipedia.org/wiki/Lies,_damned_lies,_and_statistics
Yes but what happens if the engine fails at 30,000 feet ?
The "Gimli Glider" happens.
Hey Poe!
Explain how to distinguish velocity from closing rate for me,
But Androcles, I did that already.
No you didn't, Poe,
Why, yes, I did.
Why no, you didn't, Poe.
http://groups.google.com/group/sci.physics.relativity/browse_thread/t...
The key paragraph begins "How to distinguish..."
Perhaps blackboab would like to know how to distinguish
a closing rate from a velocity, I wouldn't want to confuse
him with some crap about object two being an observer
from a troll like you.
Object two is an observer if you are asking what the
coordinates are relative to object two. That's what
"relative to object two" means.
- Randy
.
|
|
|
| User: "Androcles" |
|
| Title: Re: Solar Cell functionality : which wavelengths are converted to electricity ? |
13 Dec 2007 03:03:35 PM |
|
|
"Randy Poe" <poespam-trap@yahoo.com> wrote in message
news:b232f69a-4f5a-44c2-b667-a96d00ed4ffe@i29g2000prf.googlegroups.com...
On Dec 13, 12:42 pm, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:25f40d8c-34a8-416a-b267-14a87653b0e2@b40g2000prf.googlegroups.com...
On Dec 13, 12:19 pm, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:00bc5ae8-65c4-4dca-b323-e85504420db7@d27g2000prf.googlegroups.com...
On Dec 13, 11:26 am, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:7b04f1ec-623c-46e6-a1f9-e3a205165074@s8g2000prg.googlegroups.com...
On Dec 13, 9:31 am, blackboab <blackb...@gmail.com> wrote:
On 13 Dec, 19:13, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"blackboab" <blackb...@gmail.com> wrote in message
news:0e952a78-da71-4e7c-ac2f-740a2ae19d5a@d27g2000prf.googlegroups.com...
Here, educate yourself:http://en.wikipedia.org/wiki/Solar_cell
from the above wiki
"The power output of a solar array is measured in watts or
kilowatts.
In order to calculate the typical energy needs of the application,
a
measurement in watt-hours, kilowatt-hours or kilowatt-hours per
day
is
often used. A rule of thumb commonly used is that peak power times
20%
gives average power, equating to one kW peak producing 4.8 kW·h
per
day."
can someone explain these figures ? 20 per cent of 1000Watts is
200
Watts,
For a 5 hour solar day that is only 1KWh per day.
He multiplied by 24 (hours) , is there a good reason for this
calculation ?
Lies,_damned_lies,_and_statistics
Beware wackypedia, anyone can write it and there is nobody
to police it but majority opinion. Nature is not a democracy,
she is a dictatorship. Majority opinions are notoriously wrong
and have been since virgin births came into vogue or Ptolemy's
universe was centred on the Earth.
Also beware averages. The average lifespan of a car is 3000 hours
not including the 100,000 hours it spends sitting in parking lots
all
day while you are at work or at the kerbside all night while you
sleep. A Rolls-Royce RB211 jet engine that can clock up 20,000
hours is considered remarkable, no automobile engine can get
close to that. Measured in passenger hours, flight is the safest
way
to travel, making the space shuttle and the ISS the safest
vehicles
on Earth.
http://en.wikipedia.org/wiki/Lies,_damned_lies,_and_statistics
Yes but what happens if the engine fails at 30,000 feet ?
The "Gimli Glider" happens.
Hey Poe!
Explain how to distinguish velocity from closing rate for me,
But Androcles, I did that already.
No you didn't, Poe,
Why, yes, I did.
Why no, you didn't, Poe.
: http://groups.google.com/group/sci.physics.relativity/browse_thread/t...
Topic not found
We're sorry, but we were unable to find the topic you were looking for.
Perhaps the URL you clicked on is out of date or broken?
: The key paragraph begins "How to distinguish..."
Perhaps blackboab would like to know how to distinguish
a closing rate from a velocity, I wouldn't want to confuse
him with some crap about object two being an observer
from a troll like you.
: Object two is an observer
Ah, right, ok, now that's cleared up.
and what is object one?
.
|
|
|
| User: "Randy Poe" |
|
| Title: Re: Solar Cell functionality : which wavelengths are converted toelectricity ? |
13 Dec 2007 03:16:11 PM |
|
|
On Dec 13, 4:03 pm, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:b232f69a-4f5a-44c2-b667-a96d00ed4ffe@i29g2000prf.googlegroups.com...
On Dec 13, 12:42 pm, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:25f40d8c-34a8-416a-b267-14a87653b0e2@b40g2000prf.googlegroups.com...=
On Dec 13, 12:19 pm, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:00bc5ae8-65c4-4dca-b323-e85504420db7@d27g2000prf.googlegroups.com.=
...
On Dec 13, 11:26 am, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:7b04f1ec-623c-46e6-a1f9-e3a205165074@s8g2000prg.googlegroups.com=
....
On Dec 13, 9:31 am, blackboab <blackb...@gmail.com> wrote:
On 13 Dec, 19:13, "Androcles" <Engin...@hogwarts.physics_a> wrote:=
"blackboab" <blackb...@gmail.com> wrote in message
news:0e952a78-da71-4e7c-ac2f-740a2ae19d5a@d27g2000prf.googlegroup=
s.com...
Here, educate yourself:http://en.wikipedia.org/wiki/Solar_cell=
from the above wiki
"The power output of a solar array is measured in watts or
kilowatts.
In order to calculate the typical energy needs of the applicatio=
n,
a
measurement in watt-hours, kilowatt-hours or kilowatt-hours per
day
is
often used. A rule of thumb commonly used is that peak power tim=
es
20%
gives average power, equating to one kW peak producing 4.8 kW=B7=
h
per
day."
can someone explain these figures ? 20 per cent of 1000Watts is
200
Watts,
For a 5 hour solar day that is only 1KWh per day.
He multiplied by 24 (hours) , is there a good reason for this
calculation ?
Lies,_damned_lies,_and_statistics
Beware wackypedia, anyone can write it and there is nobody
to police it but majority opinion. Nature is not a democracy,
she is a dictatorship. Majority opinions are notoriously wrong
and have been since virgin births came into vogue or Ptolemy's
universe was centred on the Earth.
Also beware averages. The average lifespan of a car is 3000 hour=
s
not including the 100,000 hours it spends sitting in parking lot=
s
all
day while you are at work or at the kerbside all night while you=
sleep. A Rolls-Royce RB211 jet engine that can clock up 20,000
hours is considered remarkable, no automobile engine can get
close to that. Measured in passenger hours, flight is the safest=
way
to travel, making the space shuttle and the ISS the safest
vehicles
on Earth.
http://en.wikipedia.org/wiki/Lies,_damned_lies,_and_statistics
Yes but what happens if the engine fails at 30,000 feet ?
The "Gimli Glider" happens.
Hey Poe!
Explain how to distinguish velocity from closing rate for me,
But Androcles, I did that already.
No you didn't, Poe,
Why, yes, I did.
Why no, you didn't, Poe.
:http://groups.google.com/group/sci.physics.relativity/browse_thread/t...
Topic not found
We're sorry, but we were unable to find the topic you were looking for.
Perhaps the URL you clicked on is out of date or broken?
http://groups.google.com/group/sci.physics.relativity/msg/012f4f717f718e97
: The key paragraph begins "How to distinguish..."
Perhaps blackboab would like to know how to distinguish
a closing rate from a velocity, I wouldn't want to confuse
him with some crap about object two being an observer
from a troll like you.
: Object two is an observer
=2E.. if you are trying to define "velocity relative to object
two".
Ah, right, ok, now that's cleared up.
Well, not without the complete sentence. Sorry about
the attention span thing. Or maybe it's narcolepsy.
Perhaps you should have that looked into.
and what is object one?
The object for which you are trying to define the relative velocity
or the closing velocity.
- Randy
.
|
|
|
| User: "Androcles" |
|
| Title: Re: Solar Cell functionality : which wavelengths are converted to electricity ? |
13 Dec 2007 04:13:51 PM |
|
|
"Randy Poe" <poespam-trap@yahoo.com> wrote in message
news:ee74c860-4c18-4365-8fdc-5b4ad0d4f7a6@s8g2000prg.googlegroups.com...
On Dec 13, 4:03 pm, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:b232f69a-4f5a-44c2-b667-a96d00ed4ffe@i29g2000prf.googlegroups.com...
On Dec 13, 12:42 pm, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:25f40d8c-34a8-416a-b267-14a87653b0e2@b40g2000prf.googlegroups.com...
On Dec 13, 12:19 pm, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:00bc5ae8-65c4-4dca-b323-e85504420db7@d27g2000prf.googlegroups.com...
On Dec 13, 11:26 am, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:7b04f1ec-623c-46e6-a1f9-e3a205165074@s8g2000prg.googlegroups.com...
On Dec 13, 9:31 am, blackboab <blackb...@gmail.com> wrote:
On 13 Dec, 19:13, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"blackboab" <blackb...@gmail.com> wrote in message
news:0e952a78-da71-4e7c-ac2f-740a2ae19d5a@d27g2000prf.googlegroups.com...
Here, educate yourself:http://en.wikipedia.org/wiki/Solar_cell
from the above wiki
"The power output of a solar array is measured in watts or
kilowatts.
In order to calculate the typical energy needs of the
application,
a
measurement in watt-hours, kilowatt-hours or kilowatt-hours per
day
is
often used. A rule of thumb commonly used is that peak power
times
20%
gives average power, equating to one kW peak producing 4.8 kW·h
per
day."
can someone explain these figures ? 20 per cent of 1000Watts is
200
Watts,
For a 5 hour solar day that is only 1KWh per day.
He multiplied by 24 (hours) , is there a good reason for this
calculation ?
Lies,_damned_lies,_and_statistics
Beware wackypedia, anyone can write it and there is nobody
to police it but majority opinion. Nature is not a democracy,
she is a dictatorship. Majority opinions are notoriously wrong
and have been since virgin births came into vogue or Ptolemy's
universe was centred on the Earth.
Also beware averages. The average lifespan of a car is 3000
hours
not including the 100,000 hours it spends sitting in parking
lots
all
day while you are at work or at the kerbside all night while you
sleep. A Rolls-Royce RB211 jet engine that can clock up 20,000
hours is considered remarkable, no automobile engine can get
close to that. Measured in passenger hours, flight is the safest
way
to travel, making the space shuttle and the ISS the safest
vehicles
on Earth.
http://en.wikipedia.org/wiki/Lies,_damned_lies,_and_statistics
Yes but what happens if the engine fails at 30,000 feet ?
The "Gimli Glider" happens.
Hey Poe!
Explain how to distinguish velocity from closing rate for me,
But Androcles, I did that already.
No you didn't, Poe,
Why, yes, I did.
Why no, you didn't, Poe.
:http://groups.google.com/group/sci.physics.relativity/browse_thread/t...
Topic not found
We're sorry, but we were unable to find the topic you were looking for.
Perhaps the URL you clicked on is out of date or broken?
http://groups.google.com/group/sci.physics.relativity/msg/012f4f717f718e97
Ah, that's better.
I can usually figure the "http://..." part for myself, it was the
"012f4f717f718e97" part I was having trouble with.
You wrote:
:Velocity: You measure the position vector x of an
:object in your coordinate frame at different times.
:The velocity is dx/dt, where t is the time as
:measured in your frame.
: Closing rate: v1 - v2, where v1 and v2 are velocities
: of two different objects as measured in your frame.
: How to distinguish v1 - v2 from the velocity of
: object 1 as measured by object 2:
Object 2 is an observer because object 2 does some measuring, right?
: For the closing rate,
: the velocities v1 and v2 are not measured in the frame
: of reference of either object 1 or object 2,
Ok... we are used to Blind Poe and Phuckwit Duck saying
what things are not, so skip that.
: but in
: some frame in which both may be in motion.
Ok, now... this the awkward bit that I want explained.
Object one measures the speed of fuckin' car coming toward
him (it's a passion wagon) and the car's headlights are on.
Q1: What is the velocity of light as measured by object one,
given that the light (v1) and the car (v2) are both in motion in
"some frame"?
Q2: What is the difference between the velocity of the light and
the closing rate of the light in "some frame" and how do I
distinguish it?
: On the other
: hand,
you have five nails to clip.
I don't need any other hands, I already have two, I'll clip here.
Just explain how to distinguish "closing rate" from "velocity" for me
please.
I didn't find any mention of closing rate in Einstein's crackpottery.
If Einstein meant "closing rate" when he said
http://www.fourmilab.ch/etexts/einstein/specrel/www/figures/img22.gif
http://www.fourmilab.ch/etexts/einstein/specrel/www/figures/img76.gif
instead of "velocity", that's fine too, but it doesn't help me
distinguish the difference.
Catch 22:
http://www.fourmilab.ch/etexts/einstein/specrel/www/figures/img22.gif
http://www.fourmilab.ch/etexts/einstein/specrel/www/figures/img76.gif
Heller wrote: "There was only one catch and that was Catch 22, which
specified that a concern for one's safety in the face of dangers that were
real and immediate was the process of a rational mind.
"Orr (a character in the novel) was crazy and could be grounded. All he had
to do was ask, and as soon as he did, he would no longer be crazy and would
have to fly more missions.
"Orr would be crazy to fly more missions and sane if he didn't, but if he
was sane he had to fly them. If he flew them he was crazy and didn't have
to; but if he didn't want to he was sane and had to."
In Einstein's case if you use c+v you can derive c = (c+v)/(1+v/c) from
the cuckoo malformations he blamed on Lorentz. That says you can't
use c+v.
What troll kooks like Schwartz, Poe, McCullough, Roberts, Draper, Lawrence,
Andersen, Nieminen, ewill, Olson, Tom & Jeery et. al. fail to realise is
the existence of isomorphism
http://en.wikipedia.org/wiki/Isomorphism
between Sagnac's real experiment and Einstein's hallucination experiment,
shown here:
http://www.androcles01.pwp.blueyonder.co.uk/TwoSpeedRack.gif
Einstein sends light along the rack and back again, the rack
moving at velocity v in his pipe dream.
Sagnac sends the light around the gear wheel for real.
If you analyse one you should get the same result as the other, but
you cannot use SR to derive SR, that is petitio principii, circularity.
http://en.wikipedia.org/wiki/Begging_the_question
c+v is essential to the derivation of the cuckoo malformations, the
part where Einstein screws up is:
'we establish by definition that the "time" required by
light to travel from A to B equals the "time" it requires
to travel from B to A' because I SAY SO. -- Rabbi Albert Einstein
http://www.androcles01.pwp.blueyonder.co.uk/Smart/tAB=tBA.gif
Here are some mathematical proofs:
http://en.wikipedia.org/wiki/Mathematical_proof
Not included are
Proof by "because I say so",
Proof by "everybody knows",
Proof by "it is written",
the three most popular forms used in sci.physics.relativity.
You'll often see this pathetic mob muttering "Lorentz Transformations"
but they haven't a clue how they are derived and faithfully follow their
indoctrination like lemmings.
Catch 22:
http://www.fourmilab.ch/etexts/einstein/specrel/www/figures/img22.gif
http://www.fourmilab.ch/etexts/einstein/specrel/www/figures/img76.gif
Prediction:
The troll kooks will ignore it, they are too stooopid to understand a
proof.
RULES OF REASONING IN PHILOSOPHY.
RULE I.
We are to admit no more causes of natural things than such as are both true
and sufficient to explain their appearances.
To this purpose the philosophers say that Nature does nothing in vain,
and more is in vain when less will serve; for Nature is pleased with
simplicity,
and affects not the pomp of superfluous causes.
-- Sir Isaac Newton
.
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| User: "Randy Poe" |
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| Title: Re: Solar Cell functionality : which wavelengths are converted toelectricity ? |
13 Dec 2007 07:25:01 PM |
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On Dec 13, 5:13 pm, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:ee74c860-4c18-4365-8fdc-5b4ad0d4f7a6@s8g2000prg.googlegroups.com...
On Dec 13, 4:03 pm, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:b232f69a-4f5a-44c2-b667-a96d00ed4ffe@i29g2000prf.googlegroups.com...=
On Dec 13, 12:42 pm, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:25f40d8c-34a8-416a-b267-14a87653b0e2@b40g2000prf.googlegroups.com.=
...
On Dec 13, 12:19 pm, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:00bc5ae8-65c4-4dca-b323-e85504420db7@d27g2000prf.googlegroups.co=
m...
On Dec 13, 11:26 am, "Androcles" <Engin...@hogwarts.physics_a> wrote=
:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:7b04f1ec-623c-46e6-a1f9-e3a205165074@s8g2000prg.googlegroups.c=
om...
On Dec 13, 9:31 am, blackboab <blackb...@gmail.com> wrote:
On 13 Dec, 19:13, "Androcles" <Engin...@hogwarts.physics_a> wrot=
e:
"blackboab" <blackb...@gmail.com> wrote in message
news:0e952a78-da71-4e7c-ac2f-740a2ae19d5a@d27g2000prf.googlegro=
ups.com...
Here, educate yourself:http://en.wikipedia.org/wiki/Solar_ce=
ll
from the above wiki
"The power output of a solar array is measured in watts or
kilowatts.
In order to calculate the typical energy needs of the
application,
a
measurement in watt-hours, kilowatt-hours or kilowatt-hours pe=
r
day
is
often used. A rule of thumb commonly used is that peak power
times
20%
gives average power, equating to one kW peak producing 4.8 kW=
=B7h
per
day."
can someone explain these figures ? 20 per cent of 1000Watts i=
s
200
Watts,
For a 5 hour solar day that is only 1KWh per day.
He multiplied by 24 (hours) , is there a good reason for this
calculation ?
Lies,_damned_lies,_and_statistics
Beware wackypedia, anyone can write it and there is nobody
to police it but majority opinion. Nature is not a democracy,
she is a dictatorship. Majority opinions are notoriously wrong=
and have been since virgin births came into vogue or Ptolemy's=
universe was centred on the Earth.
Also beware averages. The average lifespan of a car is 3000
hours
not including the 100,000 hours it spends sitting in parking
lots
all
day while you are at work or at the kerbside all night while y=
ou
sleep. A Rolls-Royce RB211 jet engine that can clock up 20,000=
hours is considered remarkable, no automobile engine can get
close to that. Measured in passenger hours, flight is the safe=
st
way
to travel, making the space shuttle and the ISS the safest
vehicles
on Earth.
http://en.wikipedia.org/wiki/Lies,_damned_lies,_and_statistic=
s
Yes but what happens if the engine fails at 30,000 feet ?
The "Gimli Glider" happens.
Hey Poe!
Explain how to distinguish velocity from closing rate for me,
But Androcles, I did that already.
No you didn't, Poe,
Why, yes, I did.
Why no, you didn't, Poe.
:http://groups.google.com/group/sci.physics.relativity/browse_thread/t..=
..
Topic not found
We're sorry, but we were unable to find the topic you were looking for.
Perhaps the URL you clicked on is out of date or broken?
http://groups.google.com/group/sci.physics.relativity/msg/012f4f717f7...
Ah, that's better.
I can usually figure the "http://..." part for myself, it was the
"012f4f717f718e97" part I was having trouble with.
You wrote:
:Velocity: You measure the position vector x of an
:object in your coordinate frame at different times.
:The velocity is dx/dt, where t is the time as
:measured in your frame.
: Closing rate: v1 - v2, where v1 and v2 are velocities
: of two different objects as measured in your frame.
: How to distinguish v1 - v2 from the velocity of
: object 1 as measured by object 2:
Object 2 is an observer because object 2 does some measuring, right?
If you are going to ask for the speed relative to object 2, then
object 2 does some measuring.
: For the closing rate,
: the velocities v1 and v2 are not measured in the frame
: of reference of either object 1 or object 2,
Ok... we are used to Blind Poe and Phuckwit Duck saying
what things are not, so skip that.
: but in
: some frame in which both may be in motion.
Ok, now... this the awkward bit that I want explained.
Object one measures the speed of fuckin' car coming toward
him (it's a passion wagon) and the car's headlights are on.
Q1: What is the velocity of light as measured by object one,
given that the light (v1) and the car (v2) are both in motion in
"some frame"?
As measured in the frame of object 1, object 1 is not in motion.
You asked for the velocity of light in object one's frame. So we
use object one's coordinate system, where he is always at
(0,0,0).
The velocity of light is c in that frame.
Q2: What is the difference between the velocity of the light and
the closing rate of the light in "some frame" and how do I
distinguish it?
In some other frame, light will also be seen to be moving at
speed c (according to SR), and the car will have some velocity
v1. This other observer would say that the light-car distance
is changing at speed c-v1. That's a closing rate.
You distinguish it because it isn't the velocity of the light
or the car, but the difference between them. Sorry you
don't like sentences with the word "not" in them, but that
is how you distinguish it from a velocity.
- Randy
.
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| User: "Androcles" |
|
| Title: Re: Solar Cell functionality : which wavelengths are converted to electricity ? |
14 Dec 2007 04:38:49 AM |
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|
"Randy Poe" <poespam-trap@yahoo.com> wrote in message
news:d1fdf933-11e9-41a3-aa88-ae0646b7324e@b40g2000prf.googlegroups.com...
On Dec 13, 5:13 pm, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:ee74c860-4c18-4365-8fdc-5b4ad0d4f7a6@s8g2000prg.googlegroups.com...
On Dec 13, 4:03 pm, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:b232f69a-4f5a-44c2-b667-a96d00ed4ffe@i29g2000prf.googlegroups.com...
On Dec 13, 12:42 pm, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:25f40d8c-34a8-416a-b267-14a87653b0e2@b40g2000prf.googlegroups.com...
On Dec 13, 12:19 pm, "Androcles" <Engin...@hogwarts.physics_a> wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:00bc5ae8-65c4-4dca-b323-e85504420db7@d27g2000prf.googlegroups.com...
On Dec 13, 11:26 am, "Androcles" <Engin...@hogwarts.physics_a>
wrote:
"Randy Poe" <poespam-t...@yahoo.com> wrote in message
news:7b04f1ec-623c-46e6-a1f9-e3a205165074@s8g2000prg.googlegroups.com...
On Dec 13, 9:31 am, blackboab <blackb...@gmail.com> wrote:
On 13 Dec, 19:13, "Androcles" <Engin...@hogwarts.physics_a>
wrote:
"blackboab" <blackb...@gmail.com> wrote in message
news:0e952a78-da71-4e7c-ac2f-740a2ae19d5a@d27g2000prf.googlegroups.com...
Here, educate
yourself:http://en.wikipedia.org/wiki/Solar_cell
from the above wiki
"The power output of a solar array is measured in watts or
kilowatts.
In order to calculate the typical energy needs of the
application,
a
measurement in watt-hours, kilowatt-hours or kilowatt-hours
per
day
is
often used. A rule of thumb commonly used is that peak power
times
20%
gives average power, equating to one kW peak producing 4.8
kW·h
per
day."
can someone explain these figures ? 20 per cent of 1000Watts
is
200
Watts,
For a 5 hour solar day that is only 1KWh per day.
He multiplied by 24 (hours) , is there a good reason for this
calculation ?
Lies,_damned_lies,_and_statistics
Beware wackypedia, anyone can write it and there is nobody
to police it but majority opinion. Nature is not a democracy,
she is a dictatorship. Majority opinions are notoriously wrong
and have been since virgin births came into vogue or Ptolemy's
universe was centred on the Earth.
Also beware averages. The average lifespan of a car is 3000
hours
not including the 100,000 hours it spends sitting in parking
lots
all
day while you are at work or at the kerbside all night while
you
sleep. A Rolls-Royce RB211 jet engine that can clock up 20,000
hours is considered remarkable, no automobile engine can get
close to that. Measured in passenger hours, flight is the
safest
way
to travel, making the space shuttle and the ISS the safest
vehicles
on Earth.
http://en.wikipedia.org/wiki/Lies,_damned_lies,_and_statistics
Yes but what happens if the engine fails at 30,000 feet ?
The "Gimli Glider" happens.
Hey Poe!
Explain how to distinguish velocity from closing rate for me,
But Androcles, I did that already.
No you didn't, Poe,
Why, yes, I did.
Why no, you didn't, Poe.
:http://groups.google.com/group/sci.physics.relativity/browse_thread/t...
Topic not found
We're sorry, but we were unable to find the topic you were looking for.
Perhaps the URL you clicked on is out of date or broken?
http://groups.google.com/group/sci.physics.relativity/msg/012f4f717f7...
Ah, that's better.
I can usually figure the "http://..." part for myself, it was the
"012f4f717f718e97" part I was having trouble with.
You wrote:
:Velocity: You measure the position vector x of an
:object in your coordinate frame at different times.
:The velocity is dx/dt, where t is the time as
:measured in your frame.
: Closing rate: v1 - v2, where v1 and v2 are velocities
: of two different objects as measured in your frame.
: How to distinguish v1 - v2 from the velocity of
: object 1 as measured by object 2:
Object 2 is an observer because object 2 does some measuring, right?
: If you are going to ask for the speed relative to object 2, then
: object 2 does some measuring.
Just answer the questions I do ask, don't try to guess.
Q. Object 2 is an observer because object 2 does some measuring, right?
A. Yes.
No fucking "if".
Q. Are you a moronic troll that calls observers objects?
A. Yes.
: For the closing rate,
: the velocities v1 and v2 are not measured in the frame
: of reference of either object 1 or object 2,
Ok... we are used to Blind Poe and Phuckwit Duck saying
what things are not, so skip that.
: but in
: some frame in which both may be in motion.
Ok, now... this the awkward bit that I want explained.
Object one measures the speed of fuckin' car coming toward
him (it's a passion wagon) and the car's headlights are on.
Q1: What is the velocity of light as measured by object one,
given that the light (v1) and the car (v2) are both in motion in
"some frame"?
: As measured in the frame of object 1, object 1 is not in motion.
Ok... we are used to Blind Poe and Phuckwit Duck saying
what things are not, so skip that.
:You asked for the velocity of light in object one's frame. So we
:use object one's coordinate system, where he is always at
: (0,0,0).
Poe, do try to concentrate.
Is the answer to my question
Q1: What is the velocity of light as measured by object one,
given that the light (v1) and the car (v2) are both in motion in
"some frame"?
"he is always at (0,0,0)" ???
Now I know that you like to tell everyone what things are not but
it helps nobody.
Grass is not an egg.
Trees are not stars.
The light is not always at (0,0,0)
: The velocity of light is c in that frame.
Fine. A little progress. Follow-up question.
What is the velocity of the car in that same some frame?
Q2: What is the difference between the velocity of the light and
the closing rate of the light in "some frame" and how do I
distinguish it?
In some other frame,
No, no, no, Poe, answer the fuckin' question I asked, don't change
to "some other frame".
We have the same some frame.
Q2: What is the difference between the velocity of the light (c) and
the closing rate of the light (c) in "some frame" and how do I
distinguish it?
.
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| User: "Benj" |
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| Title: Re: Solar Cell functionality : which wavelengths are converted toelectricity ? |
13 Dec 2007 02:07:34 PM |
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On Dec 13, 7:16 am, blackboab <blackb...@gmail.com> wrote:
Here, educate yourself:http://en.wikipedia.org/wiki/Solar_cell
from the above wiki
"The power output of a solar array is measured in watts or kilowatts.
In order to calculate the typical energy needs of the application, a
measurement in watt-hours, kilowatt-hours or kilowatt-hours per day is
often used. A rule of thumb commonly used is that peak power times 20%
gives average power, equating to one kW peak producing 4.8 kW=B7h per
day."
can someone explain these figures ? 20 per cent of 1000Watts is 200
Watts,
For a 5 hour solar day that is only 1KWh per day.
He multiplied by 24 (hours) , is there a good reason for this
calculation ?
------------------
Obviously it's a mistake since it is defined as a "solar" array. Of
course it does represent the maximum output you might find at say the
north pole during summer. Of course Wikipedia is a public-written
compendium so consider it your duty to go there and fix any mistakes
you found, such as this one! :-)
.
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| User: "Androcles" |
|
| Title: Re: Solar Cell functionality : which wavelengths are converted to electricity ? |
13 Dec 2007 04:13:51 PM |
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"Benj" <bjacoby@iwaynet.net> wrote in message
news:8ddcd98d-1a97-4e1d-922b-05f75b8f13e4@e10g2000prf.googlegroups.com...
On Dec 13, 7:16 am, blackboab <blackb...@gmail.com> wrote:
Here, educate yourself:http://en.wikipedia.org/wiki/Solar_cell
from the above wiki
"The power output of a solar array is measured in watts or kilowatts.
In order to calculate the typical energy needs of the application, a
measurement in watt-hours, kilowatt-hours or kilowatt-hours per day is
often used. A rule of thumb commonly used is that peak power times 20%
gives average power, equating to one kW peak producing 4.8 kW·h per
day."
can someone explain these figures ? 20 per cent of 1000Watts is 200
Watts,
For a 5 hour solar day that is only 1KWh per day.
He multiplied by 24 (hours) , is there a good reason for this
calculation ?
------------------
Obviously it's a mistake since it is defined as a "solar" array. Of
course it does represent the maximum output you might find at say the
north pole during summer. Of course Wikipedia is a public-written
compendium so consider it your duty to go there and fix any mistakes
you found, such as this one! :-)
Not worth the trouble. I tried to get Einstein's third postulate
into the relativity section because it is crucial to his paper but the
wackypedia pa-trolls didn't want any truth in their magical mystique.
'we establish by definition that the "time" required by
light to travel from A to B equals the "time" it requires
to travel from B to A'. -- Rabbi Albert Einstein
http://www.androcles01.pwp.blueyonder.co.uk/Smart/tAB=tBA.gif
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