A ball of mass 0.2kg is dropped from rest from the top of 45m tall building. What is the velocity of the ball?​

Heat from the sun reaches earth to a. radiation b. convection c. conduction

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?

The energy produced as a result of this flow of electrons from atom to atom is called