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Assuming the xylem tissues through which...

Assuming the xylem tissues through which water rises from root to the branches in a tree to be of uniform cross-section find the maximum radius of xylem tube in a `10m` high coconut tree so that water can rise to the top.
(Surface tension of water`=0.1(N)/(m)`, Angle of contact of water with xylem tube`=60^@`)

A

`2 mum`

B

`3 mu m`

C

`5 mu m`

D

`1 mu m`

Text Solution

Verified by Experts

The correct Answer is:
D
`rhog h pi r^(2)=2pi r S cos theta`
`rArr r=(2S cos theta)/(rho g h) =(2xx1xx0.5)/(10^(3)xx10xx10)=10^(-6) m`
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