A straight piece of wire 4 cm long is placed horizontally on the surface of water annd is gently pulled up . It is found that a

A straight piece of wire 4 cm long is placed horizontally on the surface of water annd is gently pulled up . It is found that a force of 560 dyne in addition to the weight of the wire is required for this purpose . Then surface tension of the water is
A. 70 dyne/cm
B. 44.8 dyne/cm
C. 700 dyne/cm
D. none

A straight piece of wire 4 cm long is placed horizontally on the surface of water annd is gently pulled up . It is found that a force of 560 dyne in a

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