An ice cube floats in a glass of water. As the ice melts, how does the level of water in the glass change? Would it make any difference if the ice cubbe were hollow? Explain.

Explanation

The level does not change. Ice has a larger valume that water of equal mass. As the ice melts, the volume of the newly converted water decreases. However, the ice which was initially above the water surface is now under the water. This compensates for the decrease in volume. It does not matter whether the ice cube is hollow or not.