# An unstable atomic nucleus of mass

## An unstable atomic nucleus of mass 17.0 X 10─27 kg initially at rest disintegrates into three particles. One of the particles, of mass 5.00 X 10─27 kg, moves along the y axis with a speed of 6.00 X 106 m/s. Another particle, of mass 8.40 X 10─27 kg, moves along the x axis with a speed of 4.00 X 106 m/s. Find

(a) The velocity of the third particle and

(b) The total kinetic energy increase in the process.

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