An unknown nucleus collides with a ${}^4He$ nucleus, and after the collision the two nuclei travel in perpendicular directions relative to each other. If kinetic energy is lost in the collision, the unknown nucleus must be
An unknown nucleus collides with a ${}^4He$ nucleus, and after the collision the two nuclei travel in perpendicular directions relative to each other. If kinetic energy is lost in the collision, the unknown nucleus must be
- A
${}^{28}N$
- B
${}^4He$
- C
${}^{12}C$
- D
a nucleus with mass lighter than ${}^4He$
Similar Questions
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- [JEE MAIN 2021]