- #1
Janiceleong26
- 276
- 4
Homework Statement
Homework Equations
Principle of conservation of momentum,
Σpi=Σpf
The Attempt at a Solution
Since the nucleus is stationary, initial momentum is zero.
Unified atomic mass constant, a.m.u = 1.66 x 10^-27
Mass of the new nucleus: (A-4) x a.m.u
Mass of proton: 4 x a.m.u
0= ((A-4) x a.m.u )(u) + (4 x a.m.u )(-v)
4v = (A-4) u
v= (A/4 -1) u
So I chose A,
But the answer is B, where have I gone wrong?