Louis Gotlib

Here is a nice summary of the main concepts of density, including calculations for D,m, and V, as well as conceptual examples of why objects float or sink. there is also some tie-in to sig figs in the calculations.

A nice packet with summaries and examples of alpha, beta an gamma decay, half-life examples and problems, the working of power plants and bombs, as well as transmutation equations and fusion.

This handout/worksheet/practice set explains the importance of significant figures, why they are used and includes examples and plenty of practice, including how to apply sig fig rules to different types of calculations