A spherical body of radius R consists of a fluid of constant density and is in equilibrium under its own gravity. If P(r) is the pressure at r (r < R), then the correct option(s) is (are)

A spherical black body of radius n radiates power p and its rate of cooling is R. then.

Assuming the earth to be a homogeneous sphere of radius R , its density in terms of G (constant of gravitation) and g (acceleration due to gravity on the surface of the earth)

Assuming the earth to be a homogencous sphere of radius R. its density in terms of G (constant of gravitation) and g (acceleration due to gravity on the surface of the earth )is

A spherical marble of radius r is made to oscillate in a bowl of radius R. What is its period of oscillation ?

Assuming the Sun to be a spherical body of radius R at a temperature of TK, evalute the total radiant powerd incident of Earth at a distance r from the sun where r_0 is the radius of the Earth and sigma is Stefan's constant.

A small spherical body of radius r is falling under gravity in a viscous medium. Due to friction the meduim gets heated. How does the rate of heating depends on radius of body when it attains terminal velocity?

A solid of radius 'R' is uniformly charged with charge density rho in its volume. A spherical cavity of radius R/2 is made in the sphere as shown in the figure. Find the electric potential at the centre of the sphere.

A spherical black body of radius r radiates power P , and its rate of cooling is R (i) P prop r (ii) P prop r^(2) (iii) R prop r^(2) (iv) R prop (1)/(r)