I stumbled on this infographic at 1BOG.org, a website that specializes in disseminating information about solar power. It is full of fun facts about our sun and solar energy, although I haven’t checked the accuracy of all the claims. An earlier version made the very Copernican statement that the sun sits at the center of

In this guided practice, I work through a projectile motion problem involving the level horizontal flight of a water balloon. I end up deriving an expression relating the range, launch angle, and initial speed of a projectile undergoing level horizontal flight. Level horizontal flight is the situation where a projectile takes off and lands at

In the wake of the Fukushima nuclear disaster, xkcd posted this infographic to help clarify the doses of ionizing radiation people receive from various sources. Click on the image to be redirected to the large-format original. As a resident of West Virginia, I found it especially interesting that a person living within 50 miles of