Re: Bullet striking metal surface produce spark?

The Ghost In The Machine <ewill@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
In sci.physics, jimp@xxxxxxxxxxxxxxxxxxxx
<jimp@xxxxxxxxxxxxxxxxxxxx>
wrote
on Sat, 10 Mar 2007 17:15:02 GMT
<lf5bc4-25.ln1@xxxxxxxxxxxxxxxx>:
G=EMC^2 Glazier <herbertglazier@xxxxxxxxx> wrote:
Jim Just a little tongue and cheek. Still I would like to know the temp
of a very high speed bullet going a great distance. Bert

A very high speed bullet would be one leaving the muzzle at around
3500 feet per second and a great distance would be 1000 yards, at
which point the bullet is going in the neighborhood of 1500 feet per
second.

Your normal high power rifle has a muzzle velocity of around 2600
feet per second.

Bullets are designed to minimize friction.

Bullets cool during flight; the act of firing them heats them orders
of magnitude more than the trivial friction.


Indeed; there's also the little issue of the muzzle getting hot. :-)

Which comes from the burning propellant, not friction.

--
Jim Pennino

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