Arock is dropped straight off a bridge that is 9 meters above the ground and falls at a constant speed of 10 m/sec. another person is 12 meters away on the same bridge. at what rate is the distance between the rock and the second person increasing just as the rock hits the ground?

:( asap! list all of the items in the item bank and match the definitions correctly.

Using a pedometer, you walk 3000 steps in 20 minutes, so your speed is 150 steps/min. each of your steps is 0.7 m long. what is your speed? 150 steps/min=/s=/h

A47.2 g block of copper whose temperature is 480 k is placed in an insulating box with a 91.8 g block of lead whose temperature is 200 k. (a) what is the equilibrium temperature of the two-block system? (b) what is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) what is the change in the entropy of the two-block system? the heat capacities of copper and lead are 386 j/kg·k and 128 j/kg·k, respectively.