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How Light Emitting Diodes (LEDs) Work
electronics.howstuffworks.com/led.htm
Light emitting diodes form numbers on digital clocks, send data from remote controls and illuminate watches - the simple genius of the design makes it infinitely applicable. And now, LEDs are affordable.
What is the Dow Jones Industrial Average?
money.howstuffworks.com/personal-finance/financial-planning/dow-jones-industrial-average.htm
The Dow Jones Industrial Average tracks a variety of stocks to assist investors. Learn how the dow jones keeps tabs on the stock market.
Why do brake lines have so many bends and loops?
auto.howstuffworks.com/auto-parts/brakes/brake-parts/brake-line-bends-loops.htm
Why do brake lines have bends and loops? They do serve a purpose -- learn why your brake lines are shaped with bends and loops and how they keep you safer.
What does it mean when a barometer is rising or falling?
science.howstuffworks.com/nature/climate-weather/atmospheric/barometer.htm
A barometer is an instrument that is used to predict the weather. Learn about barometers in this article.
What are homogenization and pasteurization?
recipes.howstuffworks.com/question147.htm
When I buy milk at the store, the label says "homogenized pasteurized milk." What are homogenization and pasteurization?
What is plywood? Why do people use it so much? What about oriented strand board (OSB)?
home.howstuffworks.com/home-improvement/remodeling/question154.htm
What is plywood? Why do people use it so much? What about oriented strand board (OSB)?
Why Do Apples and Potatoes Turn Brown When Sliced?
recipes.howstuffworks.com/question168.htm
Why do apples and potatoes turn brown when you slice them? How do you keep them from turning brown? Find out the answer in this article.
What is the crystalline substance found in disposable diapers?
home.howstuffworks.com/question207.htm
When we change our baby's diaper, he often has what we politely refer to as "crystal butt." There are little clear crystals on his bottom. It seems like they come from his diaper. Do you know what these crystals are?
What is activated charcoal and why is it used in filters?
science.howstuffworks.com/environmental/energy/question209.htm
Charcoal is carbon. Activated charcoal is charcoal that has been treated with oxygen to open up millions of tiny pores between the carbon atoms. What does this have to do with its absorbancy?
How do scratch-and-sniff stickers work?
science.howstuffworks.com/innovation/science-questions/question274.htm
How do scratch-and-sniff stickers work? What makes them last for years and years?