In beta decay, a nucleus emits an electron. A ^210Bi (bismuth) nucleus at rest u

Question

In beta decay, a nucleus emits an electron. A ^210Bi (bismuth) nucleus at rest undergoes beta decay to ^210Po(polonium).

a)Suppose the emitted electron moves to the right with a momentum of 5.90×10-22 kg*m/s. The nucleus, with mass 3.50×10-25kg , recoils to the left at a speed of 1190 m/s. Momentum conservation requires that a second particle, called an antineutrino, must also be emitted. Calculate the magnitude of the momentum of the antineutrino that is emitted in this decay.
B)
right left up or down

Explanation / Answer

net momentum = 0

momentum of anti neutrino + 5.90×10-22 - 3.50×10-25x1190 = 0

momentum of anti neutrino = -1.735x10-22 kgm/s

b) LEFT

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