Throwing away a broken vacuum cleaner is bad for the environment. In some places, tossing an old vacuum in the dumpster is downright illegal. If you can't trash the broke-down upright, you should be able to recycle it, right? Nope. Not without taking it apart and sorting it bit by bit. Most people don't have the time for that or even know what the bits are made of. So how can someone responsibly dispose of a broken vacuum cleaner?
A three-way bulb has two filaments, which allows the light to be turned on at different light levels. Learn about a three-way bulb.
The light bulb hasn't changed a whole lot in its 120 years -- the original design was just that good. Apparently, you can throw together a filament, a glass mount, an inert gas and a bit of electricity and change the world. Learn what happens when yo