A circular disk has surface charge density 20 nC/cm2 . Part A What will the surface charge density be if the radius of the disk is doubled but its tot

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.