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Amount of energy required to blow a bubb...

Amount of energy required to blow a bubble radius 5 cm , is

A

1.88 J

B

`1.88 xx 10^(-1)`J

C

`1.88 xx 10^(-2)` J

D

`1.88 xx 10` J

Text Solution

Verified by Experts

The correct Answer is:
C
` dW = 4pi r^(2)T xx 2 `
` = 8pi xx 25 xx 10^(-4) xx 30 xx 10^(-2) xx 2 `
` = 200 pi xx 30 xx 10^(-6)`
` = 1.884 xx 10^(-2)` J
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NIKITA PUBLICATION-SURFACE TENSION-Multiple Choice Questions (Question Given in MHT-CET )
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