Your body can use only one energy system at a time. a. true b. false

Match the types of competition to their descriptions

Need with these questions . need the answers in a rush for these questions are the answers i put down are correct or not? ?

The scales shown in the introduction measure mass, or the amount of matter in a particular object. the scientific law of conservation of mass states that matter cannot be created or destroyed during a chemical reaction, but it can change from one form to another. did the simulation support this scientific law? explain why or why not.