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Why do some clothing items have a tag saying to wash the item before wearing?

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Why do some clothing items have a tag saying to wash the clothing before wearing? Read this article on HowStuffWorks to learn your answer.

Why Do Most Zippers Say "YKK" on the Pull-tab?

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Zippers are found on so many products. But have you ever noticed that "YKK" is on the pull-tab of most zippers? Find out where these mysterious initials come from.

How does Dursban work?

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How does the pesticide Dursban work? Does it have the same effect on humans that it has on insects?

How many solar cells would I need in order to provide all of the electricity that my house needs?

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How many solar cells would I need in order to provide all of the electricity that my house needs? Learn more about solar cells and how they work.

How Solar Yard Lights Work

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Solar yard lights generate and store their own power in the day and release it at night. Learn how solar yard lights can illuminate your yard without wiring.

How Oscillating Sprinklers Work

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Every year, there comes a time to pull out the oscillating sprinklers. Ever wonder just what makes an oscillating sprinkler oscillate? Find out!

How does the lighter in a BBQ grill work?

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A BBQ lighter uses something called piezoelectricity to generate a nice spark that lights the grill. Learn how the lighter in a BBQ works.

Why do tools have "Drop Forged" stamped on them? What is drop forging?

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I have a number of tools (things like wrenches and C-clamps) that have the words "Drop Forged" stamped on the handle. What does that mean?

How Chain Saws Work

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If you're a homeowner looking to clean up a few trees in the yard or cut some firewood, a chain saw will be a very handy tool. Get a good look at the inner workings of a chain saw.

Are fluorescent bulbs really more efficient than normal light bulbs?

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You might have heard that fluorescent bulbs are supposed to be more efficient than normal light bulbs, but is this really the case?