Question

The planets with radii $R_1$ and $R_2$ have densities $ρ_1$ and $ρ_2$. Their atmospheric pressures are $p_1$ and $p_2$ respectively. Therefore, the ratio of masses of their atmosphere, neglecting variation of $g$ within the limits of atmosphere is:

• A. $\frac {ρ_1R_2p_1}{ρ_2R_1p_2}$
• B. $\frac {p_1R_2ρ_2}{p_2R_1ρ_1}$
• C. $\frac {p_1R_1ρ_1}{p_2R_2ρ_2}$
• D. $\frac {p_1R_1ρ_2}{p_2R_2ρ_1}$

Answer 1

Answer: (D)

$\frac {p_1R_1ρ_2}{p_2R_2ρ_1}$

Answer 2

The correct option is (D): $\frac {p_1R_1ρ_2}{p_2R_2ρ_1}$.