on a serve, you are able to cross the back line with your foot prior to hitting the ball. true or false. this is for PE

Calculate the kinetic energy of earth due to its spinning about its axis. krot = j compare your answer with the kinetic energy of the orbital motion of earth's center of mass about the sun. assume earth to be a homogeneous sphere of mass 6.00 1024 kg and radius 6.40 106 m. the radius of earth's orbit is 1.50 1011 m.

What is the magnitude of the gravitational force acting on the earth due to the sun?

Which statements did both aristotle and ptolemy assume? check all that apply.