in a billiards game, the white cue ball hits the black ball, moving the black ball to the right while the cue ball moves to the left. if the action force is applied by the cue ball to the black ball, which force is the reaction force?

Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.