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A 42-g firecracker is at rest at the origin when it explodes into three pieces. The...

A 42-g firecracker is at rest at the origin when it explodes into three pieces. The first, with mass 21 g, moves along the x axis at 29 m/s. The second, with mass 12 g, moves along they axis at 35 m/s. a) What is the mass of third plece ? b) What is the magnitude of the velocity of the third piece ? c) What angle does the third piece make with x axis ?

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