Re: is perpetual motion possible ?

On Jul 7 2008 12:32 AM, ruylopez wrote:

This is utter digression but I know that you know your ***, and I like to
poke brains around here to see what comes out. I appreciate your time
posting here. I haven't been taught Physics in like 10 years - I was
good at it in high school and early college, but I really couldn't get
myself to dig through the math to do something like major in it.

PS - Can you tell me if the force of gravity has ever been shown to travel
at some speed, like c? That one always bugs me.

It doesn't. In all current tests (difficult to test, admittedly), gravity
is shown to work at infinite velocity. The reason why it is so difficult
to test is because gravity is so weak relative to the other forces. Just
moving an object at high velocity is not perfect, and the only way we have
of removing an item from existence, matter-antimatter annihilation both
produces massive amounts of energy, and we can only produce submicroscopic
amounts of antimatter.

I suggest that you read Physics of the Impossible. It's a new book from a
phycisist who is very good at explaining the universe in layman's terms.

Fell
--
"One should always play fairly - when one has the winning cards."
Oscar Wilde

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