Why is surface tension formula divided by 2L
that is, surface tension = (F/(2L))
why divided by 2L.
Where did the 2 come from?
Example.
Calculate the force required to lift a needle
4cm long off the surface of water, if surface
tension of water is 7.3 × 10^(−4) Nm^(− 1)
Why is the formula surface tension = (F/(2L))
why not surface tension = (F/L)
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