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

Plate will cool fastest and cube the slowest.

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Sphere will cool fastest and cube the slowest.

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Plate will cool fastest and sphere the slowest.

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Cube will cool fastest and plate the slowest.

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Solution

The correct option is C Plate will cool fastest and sphere the slowest.
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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A sphere , a cube and a thin circular plate,all of same materials and same mass, are initially heated to same high temperature.

The correct option is C Plate will cool fastest and sphere the slowest.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.

The correct option is C Plate will cool fastest and sphere the slowest.
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.