Home
Class 12
PHYSICS
Consider an elastic collision between a ...

Consider an elastic collision between a neutron and a light nuclei like Beryllium and colculate neuton's energy transferred to Beryllium,

Text Solution

Verified by Experts

`f_(2)=(4m_(1)m_(2))/((m_(1)+m_(2)))`
`f_(2)=(4m_(1)m_(2))/((m_(1)+m_(2))^(2)),` Using the result of example 18
`=(4m_(1)(9m_(1)))/((m_(1)+9m_(1)))as m_(2)=9m_(1)`
`=(4xx9)/(100)or36%`
Promotional Banner

Topper's Solved these Questions

  • WORK, ENERGY AND POWER

    AAKASH INSTITUTE|Exercise SECTION-A (OBJECTIVE TYPE QUESTIONS (ONE OPTIONISCORRECT)|60 Videos

  • WORK, ENERGY AND POWER

    AAKASH INSTITUTE|Exercise SECTION-B (SUBJECTIVE TYPE QUESTIONS) (ONE OPTIONS IS CORRECT)|44 Videos

  • WORK, ENERGY AND POWER

    AAKASH INSTITUTE|Exercise IILUSTRATION|2 Videos

  • WAVES

    AAKASH INSTITUTE|Exercise ASSIGNMENT ( SECTION-D ( Assertion - Reason Type Questions ))|12 Videos

Similar Questions

Explore conceptually related problems

How many head-on elastic collisions must a neutron have with deuterium nuclei to reduce it energy from 6.561 MeV to 1 keV ?

A ball of mass in moving with speed u undergoes a head-on elastic collision with a ball of mass nm initially at rest. The fraction of the incident energy transferred to the second ball is

In a nuclear reactor, a neutron of high speed (~~10^(7)ms^(-1)) must be slowed down to 10^(3)ms^(-1) so that it can have a high probality of interacting with isotipe _92U^(235) and causing it to fission. Show that a neutron can lose most of its K.E. in an elastic collision with a light nuclei like deuterium or carbon which has a mass of only a fewe times the neutron mass. The material making up the light nuclei usually heavy water (D_(2)O) or graphite is called modertaor.

In a nuclear reactor, the neutrons produced in fission reaction have high kinetic energy of the order of few MeV. Whereas the U^(235) nucleus fissions only iwht a slow neutron. In a reactor heavy water (D_(2)O) is used to slow down the neutrons. A neutron hiting a deuterium nucleus slows down quickly. Calculate now many head on, elastic collisions must a neutron have with deuterium nuclei to reduce does not lose energy by any other way apart from collisions with deuterium. [Take "log"_(10)2=0.301 and "log"_(10)3=0.477 ]

A ball of mass 'm' moving with speed 'u' undergoes a head-on elastic collision with a ball of mass 'nm' initially at rest. Find the fraction of the incident energy transferred to the second ball.

As part of his discovery of the neutron in 1932, James Chadwick determined the mass of the neutron (newly identified particle) by firing a beam of fast meutrons, all having the same speed, as two different targets and measuing the maximum recoil speeds of the target nuclei. The maximum speed arise when an elastic head-on collision occurs between a neutron and a stationary target nucleus. Represent the masses and final speeds of the two target nuclei as m_(1), v_(1), m_(2) and v_(2) and assume Newtonian mechanics applies. The neutron mass can be calculated from the equation: m_(n) = (m_(1)v_(1) - m_(2)v_(2))/(v_(2) - v_(1)) Chadwick directed a beam of neutrons on paraffin, which contains hydrogen. The maximum speed of the protons ejected was found to be 3.3 xx 10^(7) m//s . A second experiment was performed using neutrons from the same source and nitrogen nuclei as the target. The maximum recoil speed of the nitrogen nuclei was found to be 4.7 xx 10^(6) m//s . The masses of a proton and a nitrogen nucleus were taken as 1u and 14 u , respectively. What was Chadwick's value for the neutron mass?

In perfectly elastic collision between two masses m_(1)and m_(2) in one dimension energy transfer is a maximum, when

Statement-1 : In a head on elastic collision between a moving body A with an initally stationary body B , the kinetic energy lost by A is equal to the kinetic energy gained by B till the instant of maximum deformation during their contact. Statement-2 : The total kinetic energy of system before and after collision is same in elastic collision.

AAKASH INSTITUTE-WORK, ENERGY AND POWER-TRY YOURSELF
  1. Provided a racing car does not lose traction, the time taken by it to ...

    Text Solution

    |

  2. In example 31 consider and elastic collision between a neutron and a l...

    Text Solution

    |

  3. Consider an elastic collision between a neutron and a light nuclei lik...

    Text Solution

    |

  4. For example 32, considering equal mases, get the expressions for the v...

    Text Solution

    |

  5. For example 32 consider target body B initially at rest, get the expre...

    Text Solution

    |

  6. Two particles, A and B of masses m and 3m, are moving along X and Y ax...

    Text Solution

    |

  7. Q.39, find t he loss of energy during the collision.

    Text Solution

    |

  8. When a person jumps from a tree to the ground what happens to the mome...

    Text Solution

    |

  9. It is possible for a body to receive a larger impulse from a small for...

    Text Solution

    |

  10. At a hydroelectric power plant, water is directed at high speed agains...

    Text Solution

    |

  11. If the magnitudes of two vectors are 3 and 4 and magnitude of their sc...

    Text Solution

    |

  12. If the magnitudes of two vectors are 2 and 3 and magnitude of their sc...

    Text Solution

    |

  13. Find the angle between the force vecF(5hati+4hatj-3hatk)units and disp...

    Text Solution

    |

  14. Find the angle between the vecF=(4hati+3hatj) units and displacement v...

    Text Solution

    |

  15. A body P is on a body Q and moving with it. Comment on the nature of w...

    Text Solution

    |

  16. A gas filled in a cylinder fitted with a movable piston is compressed....

    Text Solution

    |

  17. A car comes to a sliding stop in 5 m. During this process, the force o...

    Text Solution

    |

  18. A 100 kg block is kept in the back of a truck moving with an accelerat...

    Text Solution

    |

  19. A bullet of mass 200 g hits a block of thickness 6 cm with a speed of...

    Text Solution

    |

  20. A body of mass 100 g moving on a test track has final KE of 50 J after...

    Text Solution

    |