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Mach Number Question

0 votes
2,049 views
So, I understand the concept of the mach number.

Where theta is the mach angle, v is the speed of some object, and vs is the speed of sound.

sin(theta) = v/vs = mach #

However, does this formula still apply when an object is travelling at speeds that are not subsonic?

For example, if an object is travelling at 2vs, then 2vs/vs = 2 for the mach number, but sin(theta) can't ever be more than one.
asked Nov 13, 2014 in Intro College Physics by anonymous

1 Answer

0 votes
Note that vs is the speed of the source and v is the speed of sound. In this case, vs has to be larger than v. When vs is smaller than v, this equation doesn't apply anymore -- there will be no cone shaped angle since the wave front of sound wave will be traveling faster than the source.
answered Nov 13, 2014 by PhysicsDude (21,750 points)
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