Re: A question for those interested in physics...

Not Here wrote:
> 
> "Elizabeth" <boo...@greyREMOVErock.org> wrote in message
> news:3CA...@greyREMOVErock.org...
> > David Squire wrote:
> > >
> > > "Dr. Rev. Chuck, M.D., P.A." wrote:
> > >
> > > > David Squire wrote:
> > > > >
> > > > > "Dr. Rev. Chuck, M.D., P.A." wrote:
> > > > >
> > > > > > none wrote:
> > > > > > >
> > > > > > > As far as comparing them to rain... Lead is a lot heavier than
> water and
> > > > > > > will come down quite a bit faster,
> > > > > >
> > > > > > Nope.
> > > > >
> > > > > If its in a pellet the same size and shape it will. The force due to
> air
> > > > > resistance will be the same in both cases, whereas the force due to
> gravity
> > > > > will be higher on the lead pellet, due to its higher mass - it is
> more than
> > > > > 11 times more dense.
> > > >
> > > > Does the name "Galileo" ring a bell?
> > >
> > > Does "in a vacuum" ring a bell?
> > >
> > > Galileo's result is true only in the absence of air resistance. You can
> try it at
> > > home: drop a feather and a ball bearing from the same height and time
> their
> > > descents.
> > >
> > > D.
> > If you ring a bell in a vacuum does it make a sound?
> 
> You probably know the answer to that one Elizabeth, but i will try to
> enlighten all who don't know.  Sound waves need some form of matter in order
> to travel.  Since there is no form of matter in a perfect vacuum, one would
> have to conclude that the sound waves travel only through the object that
> made the sound, i.e. the bell.  Am I close?
> 
It was sort of a joke question. I haven't studied physics for a while,
but IIRC, it doesn't make a sound. I guess we're talking about a closed
system, so the energy required to ring the bell must come from within,
and barring no other forces involved, the bell would vibrate
indefinitely. Now I wonder if there's a small amount of heat involved in
the transfer of energy. Anybody know? I haven't thought about this stuff
in ages!
	Elizabeth

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