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The maximum force, in addition to the we...

The maximum force, in addition to the weight required to pull a wire of `5.0cm` long from the surface of water at temperature `20^@C`, is 728 dynes. The surface tension of water is

A

7.28 N/cm

B

7.28 dyne/cm

C

72.8 dyne/cm

D

`7.28xx10^2` dyne/cm

Text Solution

Verified by Experts

The correct Answer is:
C
`T = F/(2l) = (728)/(2xx5) = 72.8` dyne/cm
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