Home
Class 11
PHYSICS
Two drops of the same radius are falling...

Two drops of the same radius are falling through air with a steady velcoity of `5 cm s^(-1).` If the two drops coalesce, the terminal velocity would be

A

`2.5 cm s^(-1)`

B

`10 cm s^(-1)`

C

`5sqrt2 cm s^(-1)`

D

`5xx4^(1//3)cm s^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • FRICTION IS SOLIDS AND LIQUIDS

    TARGET PUBLICATION|Exercise MCQ (EVALUATION TEST)|21 Videos

  • FRICTION IS SOLIDS AND LIQUIDS

    TARGET PUBLICATION|Exercise MCQ (CRITICAL THINKING)|66 Videos

  • FORCE

    TARGET PUBLICATION|Exercise Evaluation Test|18 Videos

  • Gravitation

    TARGET PUBLICATION|Exercise Exercise|273 Videos

Similar Questions

Explore conceptually related problems

Two drops of equal size are falling vertically through air with a constant terminal velocity of 0.15 cm//s. What should be the velocity if these drops coalesce to from one drop ?

The terminal velocity of a water drop of radius 0.01 mm falling through air is 1.12 cm/s. If the density of air is neglected, the coefficient of viscosity of air is [density of water =10^(3) kg//m^(3), g=9.8m//s^(2)]

Water drop of radius 0.3 mm is falling through air is 18 xx 10^(-5) kg m^(-1)V^(-1) , then the viscous force acting on the drop will be

A disc of mass 2 kg and radius 0.2 m is rotating about an axis passing through its centre and perpendicular to its plane with an angular velocity 50 rad/s. Another disc of mass 4 kg and radius 0.1m rotates about an axis passing through its centre and perpendicular to its plane with angular velocity 100 rad/s. If the two discs are coaxially coupled, then the angular velocity of the coupled system would be

A body of mass 0.1 kg travelling with a velocity of 5 m/s, collides head-on with another body of mass 0.2 kg travelling in the same direction with a velocity of 1.2 m/s. If the two bodies stick together after collision, their common velocity is

Two drops of soap equal radius r coalesce to form a single drop under isothermal conditions . The radius of such a drop would be

A soap bubble in vacuum has a radius of 3 cm and another soap bubble in vacuum has a radius of 4 cm . If the two bubbles coalesce under isothermal conditions then the radius of the new bubble is :

Two metal ball of radius R and 2 R falling through a fluid have same velocity at some point. The viscous drag acting on them at that instant are in the ratio

A balloon has 5 g of air. A small hole is pierced into it. The air escapes at a uniform rate with a velocity of 4 cm/s. If the balloon shrinks completely in 2.5 s, then the average force acting on the balloon is

If a solid sphere of mass 1kg and radius 3 cm is rotating about an axis passing through its centre with an angular velocity of 50 rad/s, then the kinetic energy of rotation will be

TARGET PUBLICATION-FRICTION IS SOLIDS AND LIQUIDS -MCQ (COMPETITIVE THINKING)
  1. Two solid spheres of same metal but of mass M and 8M fall simultaneous...

    Text Solution

    |

  2. Two spheres of equal masses but radii r(1) and r(2) are allowed to fal...

    Text Solution

    |

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

    Text Solution

    |

  4. The onset of turbulence in a liquid is determined by

    Text Solution

    |

  5. The dimensions of Reynold’s constant are

    Text Solution

    |

  6. The speed at which the flow of water in a long cylindrical pipe of dia...

    Text Solution

    |

  7. A horizontal pipeline carrying gasoline has a cross-sectional diameter...

    Text Solution

    |

  8. The water flows form a tap of diameter 1.25 cm with a rate of 5xx10^(-...

    Text Solution

    |

  9. Consider the following equation of Bernoulli's theorem. P + (1)/(2) ...

    Text Solution

    |

  10. Water flows steadily through a horizontal pipe of variable cross-secti...

    Text Solution

    |

  11. A manometer connected to a closed tap rads 4.5 xx10^(5) pascal. When t...

    Text Solution

    |

  12. A wind with speed 40 m//s blows parallel to the roof of a house. The a...

    Text Solution

    |

  13. Water is filled in a cylindrical container to a height of 3m. The rati...

    Text Solution

    |

  14. A cylindrical tank having cross-sectional area A is filled with water ...

    Text Solution

    |

  15. A cylindrical vessel of 100 cm height is kept filled upto the brim. It...

    Text Solution

    |

  16. A cylinder of height h is filled with water and is kept on a block of ...

    Text Solution

    |

  17. A roller is made by joining together two cones at their vertices O, ti...

    Text Solution

    |

  18. The coefficient of static and dynamic friction between a body and the ...

    Text Solution

    |

  19. A body of mass M is resting on a rough horizontal plane surface the c...

    Text Solution

    |

  20. A plank with a box on it at one end is gradully raised about the other...

    Text Solution

    |