Two spheres have charges -3.1 x 10^-7 C and -3.7 x10^-7 C, respectively. They are separated by a distance of 9.0cm. Calculate the magnitude of the force the two charges exert on each other

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

Acar traveling at 22 m/s starts to decelerate steadily. it comes to a complete stop in 15 seconds. what is it’s acceleration?

Asap and show ! a 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.