Question

A 10 cm long wire is placed horizontally on the surface of water and is gently pulled up witha force of 0.02 to keep the wire in equilibrium. The surface tension of water is

Answer 1

Answer:

=> The data given here is,

F =.02*100 = 2 n

l = 10 cm = .1 m

S = ?

=> generally, two surfaces are there on the Liquid film. therefore,

=> As per the formula,

Force = 2 * length * surface tension

∴ F = 2l*S

S = F / 2l

S = 2 / 2 * .1

S = 2 / 0.2

S = 1000 N m^-1

Thus, the surface tension of water is 1,000 N m^-1

Answer 2

Answer:

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