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`        A sphere and a cube of same material and same total surfacearea are placed in the same evacuated space turn by turn, afterthey are heated to the same temperature. Let initial rate ofcooling of the sphere and cube are R1 and R2 respectively, thencompare its initial rate of cooling:`
2 years ago

Satish
12 Points
```							Tsa of sphere = 4πr^2 and that of cube =6s^2 Given both are equal so 3s^2=2πr^2=>s/r={2π/3}^1/2Rate of cooling directly proportional to  A/M
```
one year ago
Satish
12 Points
```							Tsa of sphere = 4πr^2 and that of cube =6s^2 Given both are equal so 3s^2=2πr^2=>s/r={2π/3}^1/2  Rate of cooling directly proportional to Area/mass=>R1/R2=3s/6r=1/2{s/r} =1/2(2π/3)^1/2=(π/6)^1/2
```
one year ago
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### Course Features

• 731 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions