Find the magnitude of the linear momentum for the following cases. (Enter your answers in kg . m/s.) (a) a neutron with mass 1.67 x 10-27 kg, moving with a speed of 4.50 106 m/s kg. m/s (b) a 12.0-g bullet moving with a speed of 500 m/s kg. m/s (c) a 72.5-kg runner running with a speed of 10.0 m/s kg m/s (d) the Earth (mass = 5.98 x 1024 kg) moving with an orbital speed equal to 2.98 x 104 m/s. kg m/s