How does radioactive decay work?

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cpspolly
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OP warned about not providing an attempt at a solution.
Homework Statement
Please help with these questions, really don't know how to do it:)
thanks a lot
Relevant Equations
maybe related to conservation of momentum
Photo of a printed multiple-choice physics worksheet with two questions: question 7 on the kinetic energy ratio of an alpha particle to a residual nucleus, and a uranium-238 alpha-decay question, each with options A to D.
 
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cpspolly said:
Homework Statement:: Please help with these questions, really don't know how to do it:)
thanks a lot
Relevant Equations:: maybe related to conservation of momentum

View attachment 299171
Per forum rules, you must post an attempt. Urgency is not an excuse, and failure to post an attempt straight away is only going to slow things down.
Yes, momentum conservation will be a good start, so write the appropriate equation. Any other conservation laws that might apply?
 

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