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A hollow sphere which has a small hole i...

A hollow sphere which has a small hole in its bottom in water to a depth of 30 cm before any water enters in it. If the surface tension of water is 75 dynes/cm then find the radius of the hole in metres (taking `g=10m//s^(2))`

Text Solution

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Radius of the hole `r=(2T)/(hdg)=(2xx75xx10^(-3))/(30xx10^(-2)xx10^(3)xx10)`
`=5xx10^(-5)m.`
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