Problems are listed in approximate order of difficulty. A single dot (•) indicates straightforward problems involving just one main concept and sometimes requiring no more than substitution of numbers in the appropriate formula. Two dots (••) identify problems that are slightly more challenging and usually involve more than one concept. Three dots (•••) indicate problems that are distinctly more challenging, either because they are intrinsically difficult or involve lengthy calculations. Needless to say, these distinctions are hard to draw and are only approximate.
•• (Section 17.10) Use the data in Appendix D to find the half-lives of the isotopes 232U, 234U, 236U, and 238U and the kinetic energy released in their alpha decays. Use plotting software to make a plot of in t1/2 against K−1/2 to see how well these fit a straight line as predicted by (17.78).
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