The average distance between the center of the earth and the center of its moon is 3.84 x 108 m. the mass of the earth is 5.97x1024kg. what is the orbital speed and period of earth’s moon?

Estimate the kinetic energy of the neptune with respect to the sun as the sum of the terms, that due to its daily rotation about its axis, and that due to its yearly revolution about the sun. [assume the neptune is a uniform sphere with mass = 1.0×1026 kg , radius = 2.5×1010 m , rotation period 16.1 h , orbital period 6.01×104 d and is 4.6×109 km from the sun.]