Archive for April, 2009

These two videos demonstrate a phenomenon called the “Floating Water Bridge”. See also: High Voltage Water bridges The bridge can stretch up to about an inch. To create the bridge you start with two containers of deionized water. You add electrodes (visible in the second video) and apply 10,000 to 15,000 volts DC between the [...]

If you are looking for a cheap source of calories, a baked potato is one of the least expensive if you buy the potatoes on sale. Here’s how you bake a potato in a microwave: Here’s how to cook them in a conventional oven: Note that when he says “190 to 200 degrees” he is [...]

The sun shines every day and we don’t really think about it. But the amount of energy that the sun produces is astounding. How much energy is the sun producing? On earth we see about 1 kilowatt per square meter of sunshine. In space (because there is no atmosphere) it is more like 2 kilowatts [...]

The worm within – “I had finished doing what we all do at the toilet, stood, and casually, almost like a cat, turned around to look down and make sure. This time, looking down, something caught my attention. Among the customary contents, there was a bright, clean, white thing down there…” Chemical ‘caterpillar’ points to [...]

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There are many kinds of motion sensors, from active to passive systems. Get the scoop on how myriad motion sensing systems work in this podcast from HowStuffWorks.com.

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Some theorists suggest that single-sex classrooms create more effective learning environments, while others disagree. Tune in as Molly and Cristen weigh the arguments for and against gender-segregated classrooms in this podcast from HowStuffWorks.com.

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We might not all grow up to be astronauts, but there are lots of everyday technologies that we can thank NASA for. Find out which technologies were space-tested before they landed on Earth in this podcast from HowStuffWorks.com.

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It’s hard to believe that anyone would trade the thriving island of Manhattan for a spice, but history is full of surprises. Find out why — and how — the Dutch traded Manhattan for nutmeg in this podcast from HowStuffWorks.com.

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You Asked: How do you get a book published? Adrienne, Hampton, Va. Marshall Answered: Today there are several ways to get a book published: 1) The traditional way is to send the book to a publisher and get it accepted. The publisher then edits and publishes the book. You get a royalty check. 2) There [...]

You Asked: How do septic tanks work? — Jerry, Cottonwood, Calif. Marshall Answered: You flush the toilet. A bunch of liquid and solid waste heads toward the septic tank. The tank might hold 1,000 gallons. Some of the solid waste floats to the top. The rest sinks to the bottom. In the middle, the liquid [...]

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