A box is lifted 2.2 m above its initial height and its GPE increases by 7.2 J. What is the mass of the box?

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

A1,700kg car is being used to give a 1,400kg car a push start by exerting a force of 140n the impulse on the smaller car during the 30.0s of contact is +670kg*m/s. what is the impulse of the smaller car on the larger car? -814 kg*m/s 0kg *m/s -670kg*m/s -550kg*m/s

An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. what other characteristic does the radiation have?