Question: In many problems the sonic (*) properties are more useful reference values than the stagnation properties. For isentropic flow of a perfect gas, derive relations

In many problems the sonic (*) properties are more useful reference values than the stagnation properties. For isentropic flow of a perfect gas, derive relations for p/p*, T/T*, and ρ/ρ* as functions of the Mach number. Let us help by giving the density-ratio formula:

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