A student uses a spring with a spring constant of 366 N/m in his projectile apparatus. A ball with 56 J of potential energy is dropped from a height of 4.5 m, what will the compression of the spring be?

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

Most of the volume of an atom is occupied by the

An object in mechanical equilibrium is an object