Tuesday
September 2, 2014

Homework Help: AP Physics

Posted by Amanda. on Wednesday, March 9, 2011 at 9:21am.

Two radioactive isotopes are extracted from spent nuclear fuel and placed in a metal container, which is then
sealed and deposited in a nuclear waste disposal facility. The graph above shows how many nuclei of isotopes
1 and 2 remain as a function of time.

1) What type of radiation (alpha, beta, or gamma) would be most likely to escape through the container walls?
2) After many years, when the container is removed, it is found to contain helium gas, and the total mass of the
contents is found to have decreased. Account for each of these two observations.
I have no ideas. Please help. Thank You.

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