A neutron is an electrically neutral subatomic particle with a mass just slightly greater than that of a proton. A free neutron is radioactive and decays after a few minutes into other subatomic particles. In one experiment, a neutron at rest was observed to decay into a proton (mass × kg) and an electron (mass × kg). The proton and electron were shot out back-to-back. The proton speed was measured to be × m/s and the electron speed was × m/s. No other decay was detected. a. Was the momentum conserved in the decay of this neutron?

b. If a neutron was emitted in the above neutron decay, in which direction did it travel? Explain your reasoning.

c. How much momentum did this neutrino "carry away" with it?