JAMB - Physics (1978 - No. 6)
An ice cube floats in a glass of water filled to the brim. What happens when the ice melts?
The water level remains the same
there is a drop in the level of water in the glass due to condensation on its outside
the water in the glass overflows
the level of water drops because melted ice occupies less volume
none of the above is correct
解释
The law of flotation states that a floating object displaces its own weight of the fluid in which it floats. This implies that no extra volume of water is added as the ice melts.