Question

A block of wood is floating in water at 0°C. The temperature of water is slowly raised to 10°C. How will the percentage of volume of block above water level change with rise in temperature?

Answer 1

Explanation:

The ℅ change in volume of block above water level change can be due to following reasons.

The density/volume of the fluid changes due to increase/decrease in temperature

The volume of the material which is immersed changes due to temperature change.

Now you have already provided fluid as water and the block of wood.

As per Archimedes the upward force(Bouyant force) acting on block is equal to weight of fluid displaced by a body