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A block of wood is floating on water at 0°C with a certain volume V above water level. The temperature of water is slowly raised to 20°C. How does the volume V change with the rise of temperature?(a) remain unchanged (b) decrease continuously (c) decrease till 4°C and then increase (d) increase till 4°C and then decrease. |
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Answer» (a) increase till 4°C and then decrease. The density of water increases from 0° to 4°C and then decreases. Therefore, the volume V of the block above water level will increase till 4°C and then decrease. |
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