How to solve distance under velocity time graph

Agraduated cylinder contains 63.0 ml of water. a piece of gold, which has a density of 19.3 g/ cm3, is added to the water and the volume goes up to 64.5 ml. calculate the mass in grams of the gold that was added to the water. explain how you got your answer.

If you held a stone over the mouth of a well and then let it go , what would happen to the stone? explain your answer.

What 2 properties are used to classify radiation