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The viscous resistance of a tube to liqu...

The viscous resistance of a tube to liquid flow is R. its resistance for a narrow tube of same length and `(1)/(3)` times radius is

A

`R//3`

B

3R

C

27R

D

8IR

Text Solution

Verified by Experts

The correct Answer is:
D
`R=(8etal)/(pir^(4)), R alpha(1)/(r^(4))`
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