Question: A radioactive nucleus is at rest when it spontaneously decays by emitting an electron and neutrino. The momentum of the electron is 8.20 1019

A radioactive nucleus is at rest when it spontaneously decays by emitting an electron and neutrino. The momentum of the electron is 8.20 × 10−19 kg·m/s and it is directed at right angles to that of the neutrino. The neutrino's momentum has magnitude 5.00 × 10 − 19 kg·m/s.
(a) In what direction does the newly formed (daughter) nucleus recoil?
(b) What is its momentum?

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