The process by which people walk

a) requires only a little energy. b)is powered by the body’s surplus heat energy. c)relies on the conversion of chemical energy from food into mechanical energy by muscles. d)relies on the creation of mechanical energy by muscles, which is transferred into heat energy.

An object moves from the position +34m to the position -15m in 15 seconds. what is it's total displacement? what is it's average velocity?

Selma made a diagram to compare convection and radiation. which label belongs in the area marked x? must involve temperature differences between substances or objects only occurs when molecules are in direct contact involves the movement of fluids based on density differences can occur where there is little or no matter

What are the necessary conditions for fusion?