Question

A sphere , a cube and a thin circular plate,all of same materials and same mass, are initially heated to same high temperature. 

A

Plate will cool fastest and cube the slowest.

B

Sphere will cool fastest and cube the slowest.

C

Plate will cool fastest and sphere the slowest.

D

Cube will cool fastest and plate the slowest.

Medium

Solution

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Correct option is C)

The circular plate has maximum surface area and as such it cools the fastest. For a given volume (mass in this case),a sphere has the least surface area and accordingly cools the slowest.

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