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Your search for "laser" returned 24 results
5 Tools That Are a Must for a Builder's Toolbox
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A builder's toolbox has to contain many tools, but if you had to pick five, which would you choose? Learn what goes into a builder's toolbox.
How Burglar Alarms Work
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Burglar alarms are found in every retail store and are becoming more common in private homes. Find out how a simple burglar alarm system works.
How to Clean a DVD
You'd like to clean a DVD, but you're not sure how. Learn how to clean a DVD in this article.
How much does 20-pound bond paper weigh?
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When I buy "20-pound bond paper," what part of it weighs 20 pounds? A ream certainly doesn't weigh 20 pounds.
How Photocopiers Work
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Most of us don't think about what's going on inside a copier while we wait for it to shoot out the copies. Find out how, in mere seconds, you can produce an exact replica of what's on a sheet of paper!
How Smoke Detectors Work
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As the saying goes, "Where there's smoke, there's fire." Smoke detectors are amazing: They're pretty inexpensive, but they save thousands of lives each year. Learn all about nuclear and light-sensing smoke detectors.
8 Ingenious Ways to Repurpose Used Coffee Grounds
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There are lots of inventive uses for old coffee grounds, including candle-making, bug prevention and de-icing roads.
How Plasma Cutters Work
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The metal used to construct buildings resists all sorts of damage, making it a very reliable material -- and very difficult to manipulate into the appropriate form. Enter the plasma cutter. Learn all about the amazing device that cuts through metal like a knife through warm butter.
How Low-flow Toilets Flush Your Waste Without Wasting Water
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Low-flow toilets have improved significantly since they first came onto the market in the 1990s. Not only can they save tons of water, they also now can flush your waste with as little as a gallon of water.
How Indoor Air Pollution Works
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Indoor air pollution can be up to 10 times worse than outdoor air pollution. Learn about indoor air pollution, its sources and its health effects.