Home
Class 12
PHYSICS
The half-life of a radioactive substance...

The half-life of a radioactive substance against `alpha-`decay is `1.2 xx 10^7 s`. What is the decay rate for `4 xx 10^15` atoms of the substance ?

Text Solution

Verified by Experts

The correct Answer is:
a. `6.30xx10^(18)` b. `5.71xx10^(6)Bq`
Promotional Banner

Topper's Solved these Questions

  • THE NUCLEUS

    RESNICK AND HALLIDAY|Exercise PRACTICE QUESTIONS (Single Correct Choice Type)|69 Videos

  • THE NUCLEUS

    RESNICK AND HALLIDAY|Exercise PRACTICE QUESTIONS (More than One Correct Choice Type)|22 Videos

  • THE NUCLEUS

    RESNICK AND HALLIDAY|Exercise CHECKPOINT|5 Videos

  • THE KINETIC THEORY OF GASES

    RESNICK AND HALLIDAY|Exercise PRACTICE QUESTIONS|72 Videos

  • UNITS AND MEASUREMENT

    RESNICK AND HALLIDAY|Exercise PRACTICE QUESTIONS (MATRIX-MATCH)|11 Videos

Similar Questions

Explore conceptually related problems

The half -life of a radioactive substance is 1.192 xx 10^(7) s against alpha- decay. Calculate the decay rate for 3.18 xx 10^(15) atoms of the substance

The half life of radioactive substance is 1.1xx10^7 s. What is the decay rate for 4.4xx10^15 atoms of the substance ?

Half-life of a certain radioactive materal against alpha -decay is 138 days. After what lapse of time the undecayed fraction of the material will be 6.25 % ?

The half life of radioactive substance is T. Then the fraction of the substance that has decayed in time t is-

The half life period of a radioactive substance is 10 year. The amount of the substance decayed after 40 years would be

The rate of decay of the mass of a radioactive substance at any time is k times its mass at that time. The differential equation satisfied by the mass of the substance is

The half-life period of a radioactive substance is 5 min . The amount of substance decayed in 20 min will be

RESNICK AND HALLIDAY-THE NUCLEUS-PROBLEMS
  1. Cancer cells are more vulnerable to x and gamma radiation than are hea...

    Text Solution

    |

  2. A source contains two phosphorus radionuclei .15^32P (T(1//2) =14.3 d)...

    Text Solution

    |

  3. The half-life of a radioactive substance against alpha-decay is 1.2 xx...

    Text Solution

    |

  4. A stationary thoron nucleus (A = 220, z=90) emits an alpha particle wi...

    Text Solution

    |

  5. The binding energy per nucleon for C^(12) is 7.68 MeV and that for C^(...

    Text Solution

    |

  6. In a Rutherford scattering experiment, assume that an incident alpha p...

    Text Solution

    |

  7. A deuterium nucleus at rest absorbs a Gamma ray photon of energy 2.21 ...

    Text Solution

    |

  8. What is the binding energy per nucleon of ""^(262)Bh ? The mass of the...

    Text Solution

    |

  9. The nuclide ""^(14)C contains (a) how many protons and (b) how many ne...

    Text Solution

    |

  10. For overcoming the Coulomb barrier for fusion, methods other than heat...

    Text Solution

    |

  11. Consider the fission of .(92)^(238)U by fast neutrons. In one fission ...

    Text Solution

    |

  12. Assume that the protons in a hot ball of protons each have a kinetic e...

    Text Solution

    |

  13. The uranium ore mined today contains only 0.72% of fissionable ""^(235...

    Text Solution

    |

  14. What is the Q of the following fusion process? .(1)^(2)H+.(1)^(1)Hto...

    Text Solution

    |

  15. Calculate the Coulomb barrier height for two Li nuclei that are fired ...

    Text Solution

    |

  16. Calculate and compare the energy released by (a) fusion of 1.0kg of hy...

    Text Solution

    |

  17. Calculate the height of the Coulomb barrier for the head on collision ...

    Text Solution

    |

  18. Heavy water is the oxide of heavy hydrogen (deuterium) and is also cal...

    Text Solution

    |

  19. Show that the energy released when three alpha particles fuse to form ...

    Text Solution

    |

  20. The Sun has mass 2.0xx10^(30) kg and radiates energy at the rate 3.9xx...

    Text Solution

    |