How Aerosol Cans Work
09 Apr 2008You've probably never heard of Eric Rotheim, but you're undoubtedly familiar with his work. Rotheim, a Norwegian engineer and inventor, came up with the first aerosol-can design more than 75 years ago...
HOWSTUFFSWORK
HOWSTUFFSWORK:
speeches
How Do Polymer Crystals Work And Why Do They Absorb So Much Water?
09 Apr 2008Polymer crystals are one of those special items that are almost magical. Polymer crystals gel very similar to a gelatin dessert. One of their major uses is by the disposable diaper manufacturers, wher...
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speeches
What Force Causes A 3-pole Motor To Spin One Way And Not The Other?
09 Apr 2008If you look at How Electric Motors Work, you will see that the field magnet and the rotor magnet attract and repel one another at different points in the cycle. The commutator is in charge of flipp...
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speeches
What Is Relative Humidity And How Does it Affect How I Feel Outside?
09 Apr 2008Humidity is something we hear about daily in weather reports. Humidity is to blame for that muggy, steam-room feeling you experience on certain summer days. Humidity can be measured in several ways...
- 104
speeches
Dilophosaurus
09 Apr 2008DILOPHOSAURUS (die-LOH-foh-SORE-us) Period: Early Jurassic Order, Suborder, Family: Saurischia, Theropoda, Podokesauridae Location: North America (United States) Length: 20 feet (6 meters)...
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