Calculate the potential energy of a statue with a mass of 20 kg while sitting on a table that is 2 m high.

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

What are the dimensions of the cross section that passes through the points a, f, g, and d?

An element becomes a positively charged ion when itloses protons.loses electrons.gains electrons.gains neutrons.