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## Homework Statement

A neutron with velocity 5E5 m/s and a mass of 1.66E-27 collides with a helium nucleus, mass of 4(1.66E-27) with a velocity of 3.7E5 m/s as shown. If the speed of the neutron after collision is 5E5 m/s and it is moving in the direction of motion of the nucleus after collision, find theta, and velocity of Helium (Prime).

Diagram shown in attachment.

*also the angle 39 + theta does not equal 90 degrees

## Homework Equations

P = mv

## The Attempt at a Solution

None, I know absolutely nothing about this..

My teacher assigned it to us and expects us to solve it somehow..

Please if someone could lead my through the steps of solving it..It'd be greatly appreciated.

Don't expect me to know anything..