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The sap in trees , which consists mainly...

The sap in trees , which consists mainly of water in summer , rises in a system of capillaries of radius `r=2.5xx10^(-5)m` .The surface tension of sap is `T=7.28xx10^(-2)Nm^(-1)` and the angle of contact is `0^(@)` .Does surface tension alone account for the supply of water to the top of all trees ?

Text Solution

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Radius `(r )=2.5xx10^(-5)m`
Surface tension `(S)=7.28xx10^(-2)N//m`
Angle of contact `theta=0^(@)`
Height h `=(2Scostheta)/(rrhog)`
`=(2xx7.28xx10^(-2)xxcos0^(@))/((2.5xx10^(-5))(10^(-3))(9.8))`
`=0.6`m
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