| Topic: |
Science > Physics |
| User: |
"Tony Johansson" |
| Date: |
23 Aug 2005 05:40:19 PM |
| Object: |
experiment with fluids |
Hello!!
I have a child she is 13 years of old and she has had her first lessen about
physics today.
The teacher performed an experiment in the following way today.
He had a bucket with a funnel and from the bucket was there a hose
connected. So when you pour a fluid into the funnel the fluid goes into the
bucket and out from the hose.
The experiment was carry out in this way the teacher poured a green fluid
into the funnel and out from the hose flew a yellow fluid instead.
My child ask me why the experiment get the result as it did.
One more thing about the experiment the student in the class could not see
into the bucket because it was hidden in some way.
I'm a computer engineer so I have studied some physics at the univeristy.
What I belive about the answer to the experiment is that the fluids had
different density. So when he poured the green fluid into the funnel this
fluid was heavier so it sank to the bottom but the volume increased so the
yellow fluid reached the hole where the hose was connected so the yellow
fluid flew
out from the hose.
Does this sound like a sensible explanation to the experiment.
//Tony
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| User: "Steven Gray" |
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| Title: Re: experiment with fluids |
23 Aug 2005 06:46:52 PM |
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"Tony Johansson" <johansson.andersson@telia.com> wrote in
news:nBNOe.32259$d5.186935@newsb.telia.net:
Hello!!
Hello.
I'm a computer engineer so I have studied some physics at the
univeristy. What I belive about the answer to the experiment is that
the fluids had different density. So when he poured the green fluid
into the funnel this fluid was heavier so it sank to the bottom but the
volume increased so the yellow fluid reached the hole where the hose
was connected so the yellow fluid flew
out from the hose.
Does this sound like a sensible explanation to the experiment.
Yes. It fits the facts given very well. There are alternate explanations,
some of which would depend on how the hose is connected and run from the
bucket.
One explanation that doesn't require fluids of different densities would be
to have a smaller bucket floating inside the larger one. The teacher could
pour the green fluid into the second bucket, resulting in overflow of the
yellow fluid.
--
Steve Gray
sgray2@cfl.rr.com
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| User: "the softrat" |
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| Title: Re: experiment with fluids |
23 Aug 2005 08:44:35 PM |
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On Tue, 23 Aug 2005 22:40:19 GMT, "Tony Johansson"
<johansson.andersson@telia.com> wrote:
I'm a computer engineer
That is the *real* problem. You don't exist!!
(I 'worked' with 'computer engineers' for thirty years. Not one of
them ever demonstrated that he knew anything about Engineering. They
were just a bunch of half-assed technicians and high school level (or
less) physicists with a slight salting of applied mathematicians. Most
of them gave up learning after about two and one half years of
college. The 'college' gave them a degree anyway. Why do you think
that our space program and military programs are so expensive?)
the softrat
Sometimes I get so tired of the taste of my own toes.
mailto:softrat@pobox.com
--
A little rudeness and disrespect can elevate a meaningless
interaction to a battle of wills and add drama to an otherwise
dull day.
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| User: "Uncle Al" |
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| Title: Re: experiment with fluids |
23 Aug 2005 07:08:44 PM |
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Tony Johansson wrote:
Hello!!
I have a child she is 13 years of old and she has had her first lessen about
physics today.
Shouldn't you propertly wait until she is in her 30s? A kid sees a
pendulum and next thing you know you've got a nuclear accelerator in
the broom closet. Then Mom goes to vacuum up some dust and..
<http://www.scifilm.org/tv/outerlimits/outerlimits1-11.html>
The teacher performed an experiment in the following way today.
He had a bucket with a funnel and from the bucket was there a hose
connected. So when you pour a fluid into the funnel the fluid goes into the
bucket and out from the hose.
The experiment was carry out in this way the teacher poured a green fluid
into the funnel and out from the hose flew a yellow fluid instead.
My child ask me why the experiment get the result as it did.
One more thing about the experiment the student in the class could not see
into the bucket because it was hidden in some way.
We might be talking chemistry. God did it. The big hairy angry God
of Abraham wants to see collection plates overflowing every Sunday
when He invariably comes up short of pocket change.
I'm a computer engineer so I have studied some physics at the univeristy.
What I belive about the answer to the experiment is that the fluids had
different density. So when he poured the green fluid into the funnel this
fluid was heavier so it sank to the bottom but the volume increased so the
yellow fluid reached the hole where the hose was connected so the yellow
fluid flew
out from the hose.
Does this sound like a sensible explanation to the experiment.
Sure, but why beat a horse when you can beat the rider? The bucket
had some soluble acid or base in it. The water contained an acid-base
indicator. In one color and pH, out the others. Bromthymol Blue
would do it, pH 6-7.6 transition.
Uncle Al says, "Never assume malice when stupidity will explain it."
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf
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