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The surface tension of water is 72 dyne/...

The surface tension of water is 72 dyne/cm. convert it in SI unit.

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The correct Answer is:
B
1 dyne = `10^(-5) N `
`1 cm = 10^(-2) m`
` :. 72 "dyne"//cm`
` = (72 xx10^(-7))/(10^(-2)) (N)/(m)`
` = 0.072 (N)/(m) `
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