Home
Class 9
PHYSICS
A mercury barometer set up inside a seal...

A mercury barometer set up inside a sealed cabin on the moon containing air at our usual atmospheric pressure and temperature would stant about:

A

760 mm

B

`((760)/(6))`mm

C

`(760xx6)`mm

D

zero

Text Solution

Verified by Experts

The correct Answer is:
C

As `P=hrhog`, when g becomes `(g)/(60`, h becomes 6h i.e., `(760xx6)`mm so that P remains the same (i.e., 760 mm of mercury colymn`-`our usual atmospheric pressure).
Promotional Banner

Topper's Solved these Questions

  • FLOTATION

    PRADEEP|Exercise Oral Testing|21 Videos
  • FLOTATION

    PRADEEP|Exercise Quiz Testing:Between Two Groups|9 Videos
  • FLOTATION

    PRADEEP|Exercise PROBLEMS FOR PRACTICE|18 Videos
  • FORCES AND LAWS OF MOTION

    PRADEEP|Exercise MOCK TEST|36 Videos

Similar Questions

Explore conceptually related problems

What is the height of mercury level in a barometer which is set up in a sealed cabin on the moon containing air at our usual atmospheric pressure.

A thin tube, sealed at both ends, is 100 cm long. If lies horizontally, the middle 10 cm containing mercury and the two equal containing air at stan-dard atmospheric pressure. If the tube is now turned to a verical position, by what amount will the mercury be displaced ?

At the middle of the mercury barometer tube there is a little column of air with the length l_(0) and there is vacuum at the top as shown. Under the normal atmospheric pressure and the temperature of 200 le,vom/ l_(0)=10cm . What will be the length of the air column if the temperature rises to 330 kelvin? (Neglict expansion of the tube)

A barometer tube contains a mixture of air and saturated water vopour in the space above the mercury column. It reads 70cm when the actual atmospheric pressure is 76cm of mercury. The saturation vapour pressure at roon tempature is1.0 cm of mercury, The tube is now lowered in the reservoir till the space above the mercury cloumn is reduced to half its origina volume. Find the reading of the barometer. Assume that the temperature remains constant.

Height of mercury in a barometer is h_0 = 76. 0 cm at a temperature of theta_1 = 20^(@)C . If the actual atmospheric pressure does not change, but the temperature of the air, and hence the temperature of the mercury and the tube rises to theta_(2)= 35^(@)C , what will be the height of mercury column in the barometer now? Coefficient of volume expansion of mercury and coefficient of linear expansion of glass are gamma_(Hg) =1.8xx10^(-4).^(@)C^(-1), alpha_(g)=0.09xx10^(-4).^(@)C^(-1)

A thin tube of uniform cross-section is sealed at both ends. It lies horizontally, the middle 5 cm containing mercury and the two equal end containing air at the same pressure P. When the tube is held at an angle of 60^@ with the vetical direction, the length of the air column above and below the mercury column are 46 cm and 44.5 cm respectively. Calculate the pressure P in centimeters of mercury. (The temperature of the system is kept at 30^@C ).

In a mercury barometer, at sea level, the normal pressure of the air (one atmosphere) acting on the mercury in the dish supports a 76 cm column of mercury in a closed tube. If you go up in the air, until the density has fallen to half its sea level value, what height of mercury column would you expect?

PRADEEP-FLOTATION-ASSESSMENT THROUGH PAPER-PEN TEST
  1. When measuring automobile tyre pressure, what type of presure is this:

    Text Solution

    |

  2. A suction pump at ground level can draw water from a well whose depth ...

    Text Solution

    |

  3. A mercury barometer set up inside a sealed cabin on the moon containin...

    Text Solution

    |

  4. A tank with length 10 m, breadth 8 m and depth 6 m is filled with wate...

    Text Solution

    |

  5. A beaker is filled with a liquid of density rho upto a height h If the...

    Text Solution

    |

  6. Explain how do we breath (inhalation and exhalation).

    Text Solution

    |

  7. the gauge pressure is both tyres of a bicycle is 690 k Pa. If the bicy...

    Text Solution

    |

  8. Explain why a wide steel belt is provided over the wheels of an army t...

    Text Solution

    |

  9. Why a truck or a motor but has much wider tyres?

    Text Solution

    |

  10. Why is the pressure on the ground more when a man is walking than when...

    Text Solution

    |

  11. Find the pressuer exerted on the skin of a balloon with a force of 2.1...

    Text Solution

    |

  12. A cubical box 20 cm on a side is completely immersed in a fluid. At th...

    Text Solution

    |

  13. The titanic was found in 1985 lying on the bottom of the north atlanti...

    Text Solution

    |

  14. (a) Gallinule (an aquatic bird with exceptionally long toes that are s...

    Text Solution

    |

  15. A body floats in a liquid if the buoyant force is

    Text Solution

    |

  16. Loss of wuight of a body immersed in a liquid is:

    Text Solution

    |

  17. Which of the following gases is the densest of all?

    Text Solution

    |

  18. Buoyant force acting on a body immersed in a fluid depends on:

    Text Solution

    |

  19. A boat having a length of 3 m and breadth of 2 m is floating on a lake...

    Text Solution

    |

  20. The reading of a spring balance when a block is suspended from it in a...

    Text Solution

    |