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Calculate the radius of capillary tube i...

Calculate the radius of capillary tube if water rises to a height 4.5cm. Surface tension of water is 72 dyne/cm. Take the angle of contact of water as `0^@` and g = 980 `cm//s^2`.

A

0.032 `cm

B

0.32 cm

C

0.42 cm

D

0.042 cm

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A
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