Find out the capacitance of the earth ? (Radius of the earth = 6400 km)

Find the depth at which the value of g becomes 25% of that at the surface of the earth. (Radius of the earth = 6400 km)

Find the value of acceleration due to gravity in a mine at a depth of 80 km from the surface of the earth . Radius of the earth = 6400 km .

Find the value of acceleration due to gravity in a mine at a depth of 80 km from the surface of the earth . Radius of the earth = 6400 km .

Find the value of 'g(i)' at a height of 100 km (ii) at height 6400 km from the surface of the earth. (Radius of the earth = 6400 km, g on the surface of the earth = 9.8 ms^(-2) .