Home
Class 12
MATHS
If a body (coated black) at 600K surroun...

If a body (coated black) at 600K surrounded by atmosphere at 300K has cooling rate `r_(0)`, the same body at 900K, surrounded by the same atmosphere, will have the cooling rate close to:

A

`16r_(0)//3`

B

`81r_(0)//6`

C

`16r_(0)`

D

`4r_(0)`

Text Solution

Verified by Experts

The correct Answer is:
a
Promotional Banner

Topper's Solved these Questions

  • TEST PAPERS

    BANSAL|Exercise CHEMISTRY|133 Videos

  • TEST PAPERS

    BANSAL|Exercise MATHEMATICS|58 Videos

  • TEST PAPERS

    BANSAL|Exercise MATHS SECTION - 2 [MULTIPLE CORRECT CHOICE TYPE]|6 Videos

  • PROBABILITY

    BANSAL|Exercise All Questions|1 Videos

  • THERMODYNAMICS

    BANSAL|Exercise Match the column|7 Videos

Similar Questions

Explore conceptually related problems

If a body coated black at 600 k surrounded by atmosphere at, 300 k has cooling rate r 1 ​ the same body at 900 k surrounded by the same atmosphere , will have cooling rate equal to

The rate of cooling at 600 K, if surrounding temperature is 300 K is R. The rate of cooling at 900 K is

The rate of cooling at 600 K . If surrounding temperature is 300 K is H . The rate of cooling at 900 K is

A body radiates heat at the rate of 50 J/s at 300 K. when the same body is at 600 K then its rate of radiation of heat will be

When a body has the same temperature as that of its surroundings

As difference of temperature of body and surroundings increases, rate of cooling

600 mL of nitrogen at 30 K is cooled to 5 K at the same pressure. Calculate the new volume.

Statement-1: Two metallic spheres of same size, one of copper and the other of aluminium, heated to the same temperature, will cool at the same rate when they are suspended in the same enclosure. Statement-2: The rate of cooling of a body depends on the excees of temperature of the body over the surroundings.

BANSAL-TEST PAPERS-PHYSICS
  1. One end of uniform wire of length Land of weight W is attached rigidly...

    Text Solution

    |

  2. When the speed of a rear-drive car is increasing on a horizontal road ...

    Text Solution

    |

  3. If a body (coated black) at 600K surrounded by atmosphere at 300K has ...

    Text Solution

    |

  4. In an elastic collision between disks A and B of equal mass but unequa...

    Text Solution

    |

  5. Which of the following statements is/are correct?

    Text Solution

    |

  6. Given vecA=3 hati+hatj and vecB=6hati+8hatj. Which of the following sa...

    Text Solution

    |

  7. At t = 2 sec., a particles is at (1,0,0,). It moves towards (4,4,12) w...

    Text Solution

    |

  8. A boat is moving in direction of vector -4hati+3hatj with a speed of 1...

    Text Solution

    |

  9. If the angle alpha between two forces of equal magnitude is reduced to...

    Text Solution

    |

  10. The greatest and the leat resultant of two forces acting at point are ...

    Text Solution

    |

  11. A loaded grocery cart is rolling across a parking lot in a strong wind...

    Text Solution

    |

  12. An aeroplane moves along horizontail line AB as shoen in figure. Choos...

    Text Solution

    |

  13. A gun is mounted in a stationary battleship which is used to hit two d...

    Text Solution

    |

  14. A light cable stretched between the fixed supports A and B is under a ...

    Text Solution

    |

  15. The magnitude of the vector hati+xhatj+3hatk is half of the magnitude ...

    Text Solution

    |

  16. A man swims with same speed relative to river irrespective of whether ...

    Text Solution

    |

  17. y-t graph of a projectile parabola is drawn in figure 1 and it's path ...

    Text Solution

    |

  18. 4 projectiles are projected with velocities indicated in column II. Ma...

    Text Solution

    |

  19. The velocity time graph of a particles of mass 1 kg is given as shown ...

    Text Solution

    |

  20. The potential energy 'U' of a particle veries with distance 'x' from a...

    Text Solution

    |