Newton’s law of cooling, holds good only...

Newton’s law of cooling, holds good only if the temperature difference between the body and the surroundings is

less than `20^(@)C`

more than `10^(@)C`

less than `100^(@)C`

more than `100^(@)C`

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Newton's law of cooling holds good provided the temperature difference between the body and the surroundings is .

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Newton’s law of cooling says that the rate of cooling of a body is proportional to the temperature difference between the body and its surrounding when the difference in temperature is small. (a) Will it be reasonable to assume that the rate of heating of a body is proportional to temperature difference between the surrounding and the body (for small difference in temperature) when the body is placed in a surrounding having higher temperature than the body? (b) Assuming that our assumption made in (a) is correct estimate the time required for a cup of cold coffee to gain temperature from 10^(@)C to 15^(@)C when it is kept in a room having temperature 25^(@)C . It was observed that the temperature of the cup increases from 5^(@)C to 10^(@)C in 4 min

Which law of cooling holds for really larege temperature differences ?

Newton's law og gravitation holds good for

NIKITA PUBLICATION-KINETIC THEORY OF GASES & RADIATION -MCQs (Newtons Law of Cooling)

In simple radiation correction, correction in the temperature is due t...
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A metal sphere cools from 72^(@)C to 60^(@)C in 10 minutes. If the sur...
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A body cools in 7 minutes from 60^(@)C to 40^(@)C. What will be its t...
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Newton’s law of cooling, holds good only if the temperature difference...
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A body takes, 4 minutes to cool from 100^(@)C to 70^(@)C, if the room ...
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A body in a room cools from 85^(@)C to 80^(@)C in 5 minutes. Then the ...
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A hot water kept in a beaker placed in a room cools from 60^(@)C to 50...
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A vessel full of hot water is kept in a room and it cools from 80^(@)C...
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A body cools from 50^(@)C to 49.9^(@)C in 5 s. the temperature of the ...
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A body cools from 50^(@)C to 46^(@)C in 5 min and to 40^(@)C in the ne...
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A body cools from 60^(@)C to 50^(@)C in 10 minutes . If the room tempe...
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A body cools at the rate of 0.6^(@)C//s when it is 40^(@)C above the s...
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A body cools from 60^(@)C to 52^(@)C in five minutes. What will be fur...
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A body cools at the rate of 3^(@)C//min when its temperature is 50^(@)...
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A body cools at the rate of 0.75^(@)C//s when it is 50^(@)C above the ...
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A sphere and a cube of equal volumes both are made of iron and have si...
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In the above question, the ratio of the initial rate of fall of temper...
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A body cools from 60^(@)C to 52^(@)C in 5 minutes what will be the fur...
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A body cools at the ratio of 1.2^(@)C//min when its temperature is mor...
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If the temperature of the body theta and time of cooling 't' and room ...
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