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A copper ball of radius r travels with a...

A copper ball of radius `r` travels with a uniform speed v in a viscous fluid if the ball is changed withh another ball of radius 2r then new uniform speed will be

A

v

B

2v

C

4v

D

8v

Text Solution

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The correct Answer is:
C
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ALLEN -ELASTICITY, SURFACE TENSION AND FLUID MECHANICS-Exercise 1 (Fluid Statics)
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  2. An object of weight W has a uniform rectangular cross section of a x2a...

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  3. Streamline motion is that motion in which there is-

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  4. An aeroplane of mass 3xx10^(4)kg and total wing area of 120 m^(2) is i...

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  5. One end of a horizontal pipe is closed with the help of a velve and th...

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  6. A man can swim with a speed of 4.0 km/h in still water . How long doe...

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  7. A U-tube of small and uniform cross section contains water of total le...

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  8. 16cm^(3) of water flows per second through a capillary tube of radius ...

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  9. The water level on a tank is 5m high. There is a hole of 1 cm^(2) cro...

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  10. In the following fig., the flow of liquid through a horizontal pipe is...

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  11. The diagram (figure) shows a venturimeter, through which water is flow...

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  12. Water contained in a tank flows through an orifice of a diameter 2 cm ...

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  13. More viscous oil is used in summer than in winterr in motors due to

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  14. With increase in temperature the viscosity of

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  15. A rain drop of radius 0.3 mm has a terminal velocity in air 1m/s. the ...

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  16. Two liquids of densities d(1) and d(2) are flowing in identical capill...

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  17. The velocity of falling rain drop attain limited value bacause of

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  18. The rate of flow of liquid through a capillary tube in an experiment t...

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  19. A copper ball of radius r travels with a uniform speed v in a viscous ...

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  20. Two drops of the same radius are falling through air with a steady vel...

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