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> > What creates the loud noise when a whip cracks?
> > > > Is it merely a high amplitude compression > > of the surrounding air? > > > > Is the cracking sound caused by the end of the whip > > moving at a supersonic speed? > On Wed, 04 Apr 2001 11:03:46 -0400 Tim O'Donnell <odonnt@CELINA.K12.OH.US>
writes:
> That is the case - we have actually "measured" the
speed.
But how is it possible to measure the speed of such a small
object moving such a short distance in a fraction of a second?
I doubt that it can be done with inexpensive
phototimers
or by ordinary movie cameras.
Herb
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