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Mechanical Properties of Fluids

An ice piece floats in a glass of water. How does the level change when whole of ice melts?

When the whole ice melts, the water level will reamin unchanged. The floating ice piece will displace the volume of water equal to the weight of ice. When the ice melts the volume of water so formed is exactly equal to the volume of water displaced by ice. Hence, the water level will remain unchanged.

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Ships are made up of metals whose densities are more than density of water. Even then the ships float in water. Explain why.

A boat floating in a water tank is carrying a number of large stones. If the stones are unloaded into water, what will happen to the water level?

The force required by a man to move his limbs immersed in water is smaller than the force for the same movement in air. Why?

Why does the ship rise as it enters the sea from river?

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