A straw 6 cm long floats on water. The w...

A straw `6 cm` long floats on water. The water film on one side has surface tension of `50 dyn//cm`. On the other slide, camphor reduces the surface tension to `40 dyn//cm`. The resultant force acting on the straw is

`(50xx6-40xx6)dyn`

`10 dyn`

`(50/6-40/6)dyn`

`90dyn`

Text Solution

Verified by Experts

The correct Answer is:

`F=(sigma_(1)-sigma_(2))l`

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