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Q. A hoodlum throws a stone perpendicularly downward with an initial speed v0 from the roof of a building, the height h above the ground. (a) How long does it take the stone to reach the ground? (b) What is the speed of the stone at impact? Give the answers in terms of the given variables and g.

Q. A diver releases an air bubble of volume 2.2 cm3 from the depth of 10 m below the surface of a lake, where the temperature is 7°C. What is the volume of bubble when it reaches just below the surface of the lake, where temperature is 25°C?

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