inertiahero wrote:
My son is in 5th grade and needs to invent something for school.
http://www.uspto.gov/
6 million ideas
Shoelaces with magnetic aglets so they never drag on the floor.
Compare pole orientations and results. Uncle Al gotta think of
everything.
He
has an idea that, while I don’t think is feasible, I can’t really say
why. Please advise (I'm not a physics guy).
This is one example of why universal suffrage is so untenable - unless
most of the electorate stays home on election days.
Here's the idea:
Take a plastic tube, fill with water, seal both ends. Suspend the tube
at the middle (like a teeter-totter) so it can rock up and down.
Here’s the tricky part: before sealing tube, put a floatation device
that, while able to float, is somewhat weighted (maybe a small bobber
with weights attached). The idea is that while one end is down, the
bobber will float upward, when it reaches the top, the weight will
cause the whole tube to rock downward, now the bobber is at the
bottom and begins to float upwards (back to the other end of the
tube).
It displaces the weight of its own volume of water. No change.
http://www.lhup.edu/~dsimanek/museum/unwork.htm
Perpetual motion machines
The theory is that the tube would rock up and down
perpetually. My suspicion is that nothing that would float would
weigh more than the volume of water that’s being displaced by the
floating object. Maybe this is the real physics question: Is there a
substance that, while occupying the same given volume of a quantity
of water—both weighs more than that water, yet will float in water?
No, not passively.
Thanks for any time anyone give this!
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf
.
