A radioactive nucleus at rest decays into a second nucleus, an electron, and a n

Question

A radioactive nucleus at rest decays into a second nucleus, an electron, and a neutrino. The electron and neutrino are emitted at right angles and have momenta of 9.40 10-23 kg·m/s, and 5.50 10-23 kg·m/s, respectively. What is the magnitude and direction of the momentum of the second (recoiling) nucleus?(Hint: Since momentum is a vector, use conservation of momentum in the two directions, independently.)
Magnitude
kg·m/s
Direction
° (measured from the direction opposite to the electron's momentum)

Explanation / Answer

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