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Q.

If a piece of metal is heated to temperature θ and then allowed to cool in a room which is at temperature θ0 the graph between the temperature T of  the metal and time t will be closest to:

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a

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b

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c

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d

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answer is B.

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Detailed Solution

The temperature goes on decreasing with time (non-linearly). The rate of decrease will be more initially which is depicted in the second graph. 

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