Question

The atmosphere of mars is 95% Carbon dioxide (CO₂), 3% Nitrogen (N₂), and 2% Argon (Ar) by volume. Assume that k=1.3. The average temperature is T=200K.

What is the molecular weight of the atmosphere on Mars in kg/kmol?

What is the gas constant R of the atmosphere on Mars in kJ/(kg∙K)?

What is the speed of sound in the atmosphere of Mars under these conditions? Ans. Approximately 220 m/s.

A mars probe is travelling through the atmosphere of Mars at V=2000km/hr. What is its Mach number M?

Answer 1