Home
Class 11
PHYSICS
A Piece of brass (alloy of zinc and copp...

A Piece of brass (alloy of zinc and copper) weighs 12.9 g in air. When completely immersed in water it weighs 11.3 g . What is the mass of copper contained in the alloy ? Specific gravity of zinc and copper are 7.1 and 8.9 respectively.

Text Solution

Verified by Experts

The correct Answer is:
`(7.61 g)`
Promotional Banner

Topper's Solved these Questions

  • FLUIDS AT REST

    SL ARORA|Exercise Problem|19 Videos

  • FLUIDS IN MOTION

    SL ARORA|Exercise All Questions|117 Videos

Similar Questions

Explore conceptually related problems

A piece of brass (Cu and Zn) weighs 12.9g in air. When completely immersed in water, it weighs 11.3g . Then relative densities of Cu and Zn are 8.9 and 7.1 respectively. The mass of copper in the alloy is

A piece of copper weighs 0.635 g. How many atoms of copper does it contain?

What mass of lead will weigh as much as 8 gm of iron when both are immersed in water ? (given specific gravities of iron and lead are 8 and 11 respectively).

What is the quantity of copper in 1 kg of alloy if the alloy contains 32% copper, 40% zinc and the rest is nickel?

A matallic block weighs 15N in air. It weights 12N when immersed in water and 13 N when immersed in another liquid. What is the specific gravity of the liquid?

An alloy contains only zinc and copper and they are in the ratio of 7:9. If the weight of the alloy is 8kg, then find the weight of copper in the alloy

An alloy contains only zinc and copper and they are in the ratio of 7:9. If the weight of the alloy is 8kg ,then find the weight of copper in the alloy.

SL ARORA-FLUIDS AT REST-Problem for self practice
  1. When a body of mass 240 kg is placed on a ice berg floating in sea wat...

    Text Solution

    |

  2. A cubical block of wood 10 cm on a side floats at the interface betwee...

    Text Solution

    |

  3. A Piece of brass (alloy of zinc and copper) weighs 12.9 g in air. When...

    Text Solution

    |

  4. A piece of iron floats in mercury. Given that the density of iron is 7...

    Text Solution

    |

  5. A metal cube of 5cm side and relative density 9 is suspended by thread...

    Text Solution

    |

  6. A piece of cork whose weight is 19 g is attached to a bar of silver we...

    Text Solution

    |

  7. A cube of side 4cm is just completely immersed liquid A. When it is pu...

    Text Solution

    |

  8. An iron ball has an air space in it. It weighs 1 kg in air and 0.6 kg ...

    Text Solution

    |

  9. A soap film is formed on a rectangular frame of length 7 cm dipping in...

    Text Solution

    |

  10. A soap film is on a rectangular wire ring of size 5cm xx 4cm. If the ...

    Text Solution

    |

  11. The surface area of a soap-bubble is 2.0xx10^(-3) m^(2). How much work...

    Text Solution

    |

  12. In increasing the area of a film of soap solution from 50 "cm"^(2)" ""...

    Text Solution

    |

  13. A drop of water of diameter 0.2 cm is broken up into 27,000 droplets o...

    Text Solution

    |

  14. Calculate the work done in blowing a soap bubble from radius 2cm to 5c...

    Text Solution

    |

  15. A soap bubble of radius 1//sqrtpi "cm" is expanded to radius 2//sqrtpi...

    Text Solution

    |

  16. Calculate the amount of energy evolved when 8 droplets of water ("surf...

    Text Solution

    |

  17. Calculate the amount force required to take away a flat plate of radiu...

    Text Solution

    |

  18. A thin wire is bent in the form of a ring of diameter 3.0 cm . The rin...

    Text Solution

    |

  19. the langth of a needle floating on water is 2.5 cm . How much minimum ...

    Text Solution

    |

  20. A rectangular plate of dimensions 6cm xx 4 cm and thickness 2 mm is pl...

    Text Solution

    |