Infographic: ElectricityA visual cheat sheet about electrical physics, containing the most important formulas of current and Ohm’s law expressed through an impossible water circuit analogy.(by Pierluigi Scotolati)
Volumes of Solids of Revolution: The DISC Method. Dynamic & Modifiable Applet.
Woodworking Tips: Swing-Out Tool Bar .wall-mounted tool bar shown in the drawing at right. Besides holding a number of hand tools, the bar swings out from the wall. This provides easy access to additional tools mounted behind the tool bar.