On 05/02/2012 02:26 PM, Alan Cox wrote:
Non-physicists tend to view this approach as a simplistic retreat from
reality. Hence, the joke: A physics professor says to the class, "consider a
spherical cow of mass M".
To which the smartarse student asks "do we know if the expansion of the
universe is linear in all directions, and will it therefore remain
spherical throughout the experiment"
And then the really evil student asks
"Suppose I throw the cow up in the air and catch it as it comes back
down, the kinetic energy is converted to potential energy and back,
yes ?"
"But as the universe is expanding it'll come down further than it went up
and thus energy is not conserved"
You can have fun with physicists 8)
"Physics is like sex...it may give some practical results, but that's
not why we do it." -- Richard Feynman
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