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Re: meteorite-impact physics item

 
 
 >>3)  At what size/shape will a falling object be small enough not to
 generate a sonic boom?<<

Meteorhntr>>I am not sure, but doesn't a bullet from a gun cause a sonic boom
when fired?
If so, even .22 calaber bullets ar small enough,<<

I don't have the figures on hand, but once when I was dwelling on this matter
with IMO, I looked up the muzzle velocities of .22 caliber bullets and found
out that they aren't traveling fast enough to break the sound barrier. In
fact, only a few high powered bullets in the data I found were fast enough to
break sound barrier. This was a surprise to me.

 >>5)  Doesn't a sonic boom preclude that there has to be a meteorite on
 the ground somewhere?<<
  
meteorhntr>> Iwould say it is possible that a meteor could be totally cosumed
at the very
tail end of its firery entry and still have cause a sonic boom for most of its
flight in. <<

I agree...I'm almost certain that I read fireball reports from the German
photographic fireball network that has recorded sonics and from their data
also deduced that the meteor burned itself up. 
George Zay