What is the effeciency of the machine that has an input of 120 and an output of 96?

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical