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At 20^(@)C to attain the terminal veloci...

At `20^(@)C` to attain the terminal velocity how fast will an aluminium sphere of radil 1 mm fall through water. Assume flow to be laminar flow and specific gravity of `Al=2.5`

A

`5(m)/(s)`

B

`6(m)/(s)`

C

`4(m)/(s)`

D

`2(m)/(s)`

Text Solution

Verified by Experts

The correct Answer is:
B
`V=(2r^(2)(rho_(s)-rho)g)/(9eta)`
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