while a fly ball is falling straight down, in which direction is friction acting?
a. upward
b. sideways
c. downward

If 2 moles of co_2 at 2l and 500k are expanded reversibly to 20l, more work can be obtained from an adiabatic process than from an isothermal process. is the above statement true or false?

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

If two students are running down the hall toward each other, trying to get to class, and they have the same mass and acceleration, what will happen when they collide? will their forces cancel out or will each one experience a reaction?