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Question1

A sealed tank containing seawater to a height of 13.0 m also contains air above water at a gauge pressure of 3.00 atm. Water flows out from bottom through a small hole. How fast is this water moving?

Question2

Two 1400{rm kg} cars travelling at 19{rm m/s} are crashed into different barriers. Find out an average forces exerted on (a) the car that hits a line of water barrels and takes 1.8{rm s} to stop, and (b) car that hits a concrete barrier and takes 0.5{rm s} to stop.

Question3

A 3.00-g copper penny at 25.0' C drops 50.0 m to the ground. (a) If 60 percent of the initial potential energy of the coin earth system goes increasing the internal energy of the coin determine coin's final temperature (b) does the result depends on the mass of the coin?

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