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1. | Same material is used to make a sphere, a cube and a thin circular plate and having the same mass. They are initially heated to a temperature of 3000°C. Which of these will cool fast? | |
A. | Sphere | |
B. | Cube | |
C. | Plate | |
D. | All three will cool at the same rate | |
Answer: Option C | |
Explanation: | |
All three have the same mass and hence the same volume. Therefore the plate has a maximum surface area. So, the plate will cool fastest. |
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