Newton's law of cooling states that the rate of cooling of a body is proportional to the _____________________.

temperature of the body

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excess temperature of the body over the surroundings.

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temperature of the surroundings

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temperature of the body + temperature of the surroundings

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Solution

The correct option is B
excess temperature of the body over the surroundings.

Newton's law of cooling states that the rate of cooling of a body is proportional to the excess temperature of the body over the surroundings.

That is,

dT/dt is proportional to ΔT

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