Q .     A glass capillary tube of internal radius `r = 0.25` rnm is
immersed in water. The top end of the tube projects by
`2cm` above the surface of the water. At what angle does
the liquid meet the tube? Surface tension of water
`= 0.7 N//m.`

BITSAT 2015
A

`theta = 90^o`

B

`theta = 70^o`

C

`theta = 45^o`

D

`theta = 35^o`

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