Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Question of nuclear transformation

  1. Mar 2, 2007 #1
    a U(a=238,z=92) originally at rest decays spontaneously to form thorium and an alpha particle.no gamma rays is emitted
    (a):the alpha particle emitted during decay travels a distance of 25mm in a cloud chamber.given that on average alpha particle creates 4 *raise to power 3 ions per mm of track in cloud chamberand energy required to poduce one ion pair is 4.8*raise to power -18 j.find kinetic energy with which alpha particle was emitted.
    (b):hence deduce the initial velocities of alpha particle and thorium nucleus
    c:calculate the difference between the rest masses of original uranium nucleus and sum of product of rest masses of products of decay
    plz solve them for me
    a:4.8*raise to power -13j
    b:velocity of alpha:1.20*raise to power 7 m/s
    velocity of thorium :2.05*raise to power 5 m/s
    c:mass:5.42* raise to power -30 kg
    plz post the complete process h did u solve this question
  2. jcsd
  3. Mar 2, 2007 #2


    User Avatar

    Staff: Mentor

    As I explained to you in a different thread, you need to show us your own work in order for us to help you.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook