8) if an object is in motion, does that mean that the object has a net force in the direction of that motion? explain

Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system