Which one of the following are the energy received from food and burned through activity

Chemical energy is a form of energy. a. heat b. kinetic c. potential d. electromagnetic

You hang a book bag on a spring scale and place the bag on a platform scale so that the platform scale reads 23.7n and the spring scale reads 13.8n. what is the magnitude of the force that earth exerts on the bag?

What is an aquifer for science class