A small sphere falls from rest in a viscous liquid.Due to friction heat is produced. If 'Q' is the rate of production of heart at the terminal speed and r is the radius of the sphere, the 'Q' is proportional to
A
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B
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C
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D
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Solution
The correct option is D f=6πnrv but vαr2fαr3 Q=f.vQαr5