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Heat Transfer without Losing Heat

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Question

There are four cups made of different materials: Silver, aluminium, wood and copper. In which of them will tea remain warm for a longer time?

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Solution

Wooden cup being a bad conductor of heat does not allow heat to transfer through it. So, tea remains warmer for a longer time in a wooden cup. Whereas, silver, aluminum and copper being metals are good conductors and conducts the heat of tea at a faster rate compared to wood.

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