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Q. A place kicker must kick a football from a point 33.0m from the goal. As a result of the kick, the ball must clear the crossbar which is 3.05m high. When kicked the ball leaves the ground with a speed of 22.0 m/s at an angle of 59 to the horizontal. What is its height with respect to the crossbar when it reaches the plane of the crossbar?

Q. A 23 kg piece of zinc at 71 degrees Celsius is placed in a container of water. The water has a mass of 36 kg and has a temperature of 21 degrees Celsius before the zinc is added. What is the final temperature of the water and zinc?

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