Problem: An atomic nucleus initially moving at 435 m/s emits an alpha particle in the direction of its velocity, and the remaining nucleus slows to 350 m/s. If the alpha particle has a mass of 4.0 u and the original nucleus has a mass of 216 u , what speed does the alpha particle have when it is emitted?

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An atomic nucleus initially moving at 435 m/s emits an alpha particle in the direction of its velocity, and the remaining nucleus slows to 350 m/s. If the alpha particle has a mass of 4.0 u and the original nucleus has a mass of 216 u , what speed does the alpha particle have when it is emitted?

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