The relative biological effectiveness of a particular radon decay is 10 due to alpha particles. if the absorbed dose of a person in a basement was 3.8 msv/y, what is the radiation dose in gy/y and the absorbed dose in rem/y?

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.