Please help me answer all 3!! will mark brainliest if you answer all 3 questions :) don’t steal for points please

Newton's law of universal gravitation states that the force f between two masses, m1 and m2, is given below, where g is a constant and d is the distance between the masses. find an equation that gives an instantaneous rate of change of f with respect to d. (assume m1 and m2 represent moving points.)

The necleus of an atom is made up of what subatomic particles?

Often called simply "velocity," this is the velocity of an object at a particular moment in time.