Which of the following statements is not true? only a few energy conversions are 100 percent efficient. friction between moving parts can add energy to a system. batteries change electricity into chemical energy. photosynthesis converts light energy into chemical energy.

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

The slope of a velocity time graph over any interval of time gives the during that interval

Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i.e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.