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If the maximum force in addition to the ...

If the maximum force in addition to the weight, required to pull a wire frame 5.0 cm long from a water surface at a temperature of `20^@C` is 720 dyne, the surface tension of water will be

A

72.0 dyne/cm

B

145 dyne/cm

C

7.28 dyne/cm

D

7.28 N/m

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