Question

On any planet, the presence of atmosphere implies

($C_{rms}$= root mean square velocity of molecules and

$V_{e}$= escape velocity)

• A. $C_{rms} < < V_{e}$
• B. $C_{rms} > V_{e}$
• C. $C_{rms} = V_{e}$
• D. $C_{rms} = 0$

Answer 1

Answer: (A)

$C_{rms} < < V_{e}$

Answer 2

Since $C_{rms} < < V_{e},$ hence molecules do not escape out.