1.

Find the minimum radius for a planet of mean density `rho` and temperature `T` which can detain oxygen in its atmosphere. (`M_(0)=`Molecular weight of Oxygen and `G=`Universal Gravitational constant)A. `sqrt((7)/(8)(RT)/(GM_(0)rhopi))`B. `sqrt((9)/(8)(RT)/(GM_(0)rhopi))`C. `sqrt((15)/(9)(RT)/(GM_(0)rhopi))`D. `sqrt((15)/(8)(RT)/(GM_(0)rhopi))`

Answer» `(3RT)/(2)=(M_(0)GM_(p))/(R_(p))` and use `M_(p)=(4)/(3)rho pi R_(p)^(3)`


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