In the wave models, you imagined adding energy into the wave by moving your arm up and down or back and forth. These are called mechanical waves. Explain how you know that energy traveled from you to your friend. In your answer, identify the medium that the energy traveled through?

Abody of weight 60 kg is standing in a lift the lift going upward with a uniform velocity of 4.9 metre per second slows down and stops in two seconds then apparent weight of the body during the slow down process is

If forces acting on an object are unbalanced, which factors may result fron an unbalanced force? check all that apply

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.