Waves of energy in the electromagnetic spectrum travel through space and into the earths atmosphere. which waves pass more crests past a point per second?

The momentum of an isolated system is conserved a) only in inelastic collisions. b) only in elastic collisions. c) in both elastic and inelastic collisions

One form of energy can be another type of energy. a. created to form b. transformed into c. destroyed and then created to form

Determine the time it takes for a satellite to orbit the earth in a circular "near-earth" orbit. the definition of "near-earth" orbit is one which is at a height above the surface of the earth which is small compared to the radius of the earth, so that you may take the acceleration due to gravity as essentially the same as that on the surface. does your result depend on the mass of the satellite?