- #1

- 1,426

- 67

## Homework Statement

U → Th + α

The speed of α = 6 x 10

^{5}m/s. Find the speed of neutron of Thorium!

## Homework Equations

E = mc

^{2}

momentum

## The Attempt at a Solution

I am pretty sure there is missing information, maybe the mass of α and Th. I just want to ask the way to solve it.

I thinking using the conservation of momentum. Before U decays, the total momentum is zero, so the total momentum of Th and should be zero. By knowing the mass of Th and α, we can find the speed of Th.

Is my idea correct?

And what about the speed of neutron of Thorium? Is it the same as speed of Thorium?

Thanks