The correct answer is (c) \(\frac {\rho ^*}{\rho_0}\)=0.634
Best explanation: The defined flow properties are related to each other with relations involving only Mach number and gamma. Hence, when these two values are given, the ratios can be calculated. These are important ratios and for M=1 and gamma=1.4 the values are \(\frac {T^*}{T_0}\)=0.833, \(\frac {P^*}{P_0}\)=0.528, \(\frac {\rho ^*}{\rho_0}\)=0.634