The two main physical factors that influence the speed of a mechanical wave are (aka science question)

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

The act of moving from one place to another. a. locomotor b. aerobic c. stationary d. static

In a set amount of time, a battery supplies 25j of energy to an electric circuit that includes two different loads. one of the loads produces 10 j of heat energy during this time interval. how much heat energy is produced by the second load in this time? explain your answer