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Due to capillary action, a liquid will r...

Due to capillary action, a liquid will rise in a tube if angle of contact is

A

A. acute

B

B. obtuse

C

C. `90^@`

D

D. zero

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A
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What is capillary action?

Define : angle of contact, capillarity.

How much will a liquid level be depressed inside a capillary tub of radius 0.02 cm, if the angle of contact of the liquid with the tube is 135^@ ? Surface tension of the liquid = 0.547N. m^-1 , density of the liquid =13.5xx10^3 kg. m^-3 and acceleration due to gravity =9.8 m. s^-2 .

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