You fill a tall glass with ice and then add water to the level of the glass's rim, so some fraction of the ice floats above the rim. When the ice melts, what happens to the water level? (Neglect evaporation, and assume that the ice and water remain at 0 °C during the melting process.)
a) The water overflows the rim.
b) The water level drops below the rim.
c) The water level stays at the top of the rim.
d) It depends on the difference in density between water and ice.
Concept:
As the boat floats in both fresh water and saltwater buoyant force acting on the boat is always equal to the weight of the boat. Therefore the buoyant force on the boat in salt water is equal to that in freshwater
Therefore the correct option is \((a)\)