An unstable nucleus of mass 2.9 10-26 kg, initially at rest at the origin of a coordinate system, disintegrates into three particles. One particle, having a mass of m1 = 8.5 10-27 kg, moves in the positive y-direction with speed v1 = 7.2 106 m/s. Another particle, of mass m2 = 1.4 10-26 kg, moves in the positive x-direction with speed v2 = 3.8 106 m/s. Find the magnitude and direction of the velocity of the third particle.
magnitude= ____? m/s
direction= _____ degrees counterclockwise from the +x-axis