two bodies A and B with some asses 20 kg and 30 kg respectively above the ground which have greater potential​

B has greater potential

Explanation:

We know;

Potential Energy (PE) = mgh

where, m=mass of body

g=acceleration due to gravity

h=height of body

From the formula,

PE is directly proportional to the mass of the body

so the body with greater mass has greater potential.

e

explanation:

there is no change in the electric potential energy as it is in rest on both conditions.

d) physical means can be used to separate the components of air.