Surface tension of water in the CGS cm ...

Surface tension of water in the CGS cm is 72 dyme/cm . What is its velue in SI units ?

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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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