Arocket, as it clears the launch tower, is 100 m above the ground traveling at a rate of 250 m/s. if it is accelerating at a rate of 27 m/s/s, far will it be from the ground after 20 seconds?

An insulated thermos contains 148 g of water at 72.7 ˚c. you put in a 11.7 g ice cube at 0.00 ˚c to form a system of ice + original water. the specific heat of liquid water is 4190 j/kg•k; and the heat of fusion of water is 333 kj/kg. what is the net entropy change of the system from then until the system reaches the final (equilibrium) temperature?