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A raindrop falls near the surface of the...

A raindrop falls near the surface of the earth with almost uniform velocity because

A

its weight is negligible

B

the force of surface tension balances its weight

C

the force of viscosity of air balances its weight

D

the drops are charged and atmospheric electric field balances its weight

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HC VERMA ENGLISH-SOME MECHANICAL PROPERTIES OF MATTER-Objective-1
  1. When a metal wire elongates by hanging a load on it, the gravitational...

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  2. By a surface of a liquid we mean

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  3. An ice cube is suspended in a vacuum in gravity free hall. As the ice...

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  4. When water droplets merge to form a bigger drop

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  5. The dimension ML^-1T^-2 can correspond to

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  6. Air is pushed into a soap bubble of radius r to double its radius. If ...

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  7. If more air is pushed in a soap bubble the pressure in it

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  8. If two soap bubbles of different radii are connected by a tube

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  9. Figure shows a capillary tube of radius r dipped into water. If the a...

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  10. The excess pressure inside a soap bubble is twice the excess pressurre...

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  11. Which of the following graphs may represent the relation between the c...

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  12. Water rises in a vertical capillary tube up to a length of 10 cm. If t...

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  13. A 20 cm long capillary tube is dipped in water. The water rises up to ...

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  14. Viscosity is property of

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  15. The force of viscosity is

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  16. The viscous force acting between two layers of a liquid is given by F/...

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  17. A raindrop falls near the surface of the earth with almost uniform vel...

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  18. A piece of wood is taken deep inside a long column of water and releas...

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  19. A solid sphere falls with a terminal velocity of 20 ms^-1 in air. If i...

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  20. A spherical ball is dropped in a long column of a viscous liquid. The ...

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