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A sphere II A cube III A thin circular plate All made of the same material having the same mass are initially heated to `200^(@)C` Identify the order in which the objects cool faster when left in air room temperature ? .

A

sphere

B

thin circular plate

C

cube

D

all at the same rate

Text Solution

Verified by Experts

The correct Answer is:
B
All are made from the same material and have the same temperature and mass. Hence the rate of cooling is proportional to area exposed to the surrounding. Circular plate has the largest area. Hence it will cool fastest.
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