Question 144349
The Mach number, M, is the ratio of the speed of an object, v, traveling through a fluid medium to the velocity of sound Vs, through that medium. Hence, log(M) = 
a. log(v) - log(Vs)
b. log(v-Vs)
c. log(v) + log(Vs)
d. log(v) log(Vs)

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logM = log[v/vs]
= logv - logvs
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Ans: a
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Cheers,
Stan H.