Join the Most Relevant JEE Main 2025 Test Series & get 99+ percentile! Join Now
Search any question & find its solution
Question: Answered & Verified by Expert
A nucleus of uranium decays at rest into nuclei of thorium and helium. Then:
PhysicsNuclear PhysicsNEETNEET 2015 (Phase 2)
Options:
  • A The helium nucleus has less momentum then the thorium nucleus
  • B The helium nucleus has more momentum than the thorium nucleus
  • C The helium nucleus has less kinetic energy than the thorium nucleus
  • D The helium nucleus has more kinetic energy than the thorium nucleus
Solution:
1853 Upvotes Verified Answer
The correct answer is: The helium nucleus has more kinetic energy than the thorium nucleus
UTh+α

KETh=P22mTh, KEα=P22mα

Since mα is less so KEα will be mone.

Looking for more such questions to practice?

Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.