In an aquarium filled with water, a block of ice block floats, with a bar of gold frozen in it. We mark the current water level. When the ice has molten completely and the bar of gold has sunk to the bottom of the aquarium, will the water level be higher, lower, or still the same?
Hint: Density of water is less than gold
According Archimedes rule, the ice already occupied some volume of water. When ice melts, the water level will be same when, the ice water occupies volume. Since the density of gold is less than water. So, even it sunk, it will not have any effect.