How does the forces of a collision change as the mass of the objects involved in the collision changes?

The ozone hole appears in antarctica during

An engine undergoes a cycle as shown in the diagram. during a complete cycle the work done by the gas is 28.5×103 j and the energy transferred thermally out is 99.4×103 j. there are 1.5×1024 gas molecules and they have three active degrees of freedom. 6. (6 pts) during which process(es) is energy transferred thermally into the gas? a. 1→2 b. 2→3 c. 4→1 d. 1→2 and 4→1 e. none of the above

Efficiency is the ratio of to for a system a)power in to power in b)power in to power out c) power out to power out d) power out to power in