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This quest is in examkrackers phys book.
When a 224Ra undergoes alpha decay an alpha particle is emitted at 1.0 x 107 m/s. What is the velocity of the other particle?
The answer states it's 1.8 x 105 m/s. I understand you are to use p=mv and solve for v and initial p=0 and final p=0 and the mass is from the atomic mass of Ra minus a alpha particle (220Rn).... but how is momentum found? They said it's 4 x 107?
When a 224Ra undergoes alpha decay an alpha particle is emitted at 1.0 x 107 m/s. What is the velocity of the other particle?
The answer states it's 1.8 x 105 m/s. I understand you are to use p=mv and solve for v and initial p=0 and final p=0 and the mass is from the atomic mass of Ra minus a alpha particle (220Rn).... but how is momentum found? They said it's 4 x 107?