Which one of Newton’s laws would explain why a child walking with a backpack is working harder than a child without a backpack?

What produces a record of seismic waves? richter scale seismogram barometer seismograph

Atelevision set that has been running for a while heats up even the air around it. which two laws of thermodynamics could be used to analyze this scenario

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