As we move above up from one trophic level to another in an energy pyramid, what happens to the energy? select one of the options below as your a. it decreases from one trophic level to another. b. it remains the same for each trophic level. c. it increases from one trophic level to another.

Abearing is designed to a reduce friction b. support a load c.guide moving parts such as wheels, shafts and pivots d. all of the above

How is the gravitational force related to the distance between two objects?

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final