During a circus performance, John Tailor was fired from a compressed-air cannon whose barrel was 20 m long. Mr. Tailor emerged from the cannon (twice on weekdays, three times on Saturdays and Sundays) at 60 m/s. If Mr. Tailor's mass was 60 kg, what was the average force on him when he was inside the cannon's barrel?

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)

If a star is moving toward earth, it is

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?