Category Archives: Physics

Casual Friday — How a quartz watch works

To a certain degree, wrist watches have fallen out of fashion (if you always carry a cell phone, who needs a watch?). Still, they’re impressive little packages of technology… Continue reading

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Casual Friday — how smoke detectors work

Let’s say at one of your holiday parties or dinners, somebody lost track of what’s going on in the oven and wound up setting off the smoke detector. Did you ever wonder how these loud little safety aides work? Bill (“Engineer Guy”) Hammack tells all… Continue reading

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Casual Friday — Toothpick Table Tricks

If you’re like a lot of folks, you’ve got some holiday dinners and parties on your calendar over the next week — be prepared for them! Continue reading

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Casual Friday — how a laser works

Lasers — they’re all around us these days. But have you ever wondered how and why they work? Continue reading

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Casual Friday — how a charge-coupled device (CCD) in a digital camera works

If you ever wondered how the CCD inside your digital camera actually captures an image, Bill (“Engineer Guy”) Hammack explains it all…

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Casual Friday — cutting metals, in slow-motion

A 6-minute video (apparently by the machine tool company Iscar) showing a variety of metals being cut by tools with a variety of coatings…

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Casual Friday — tasty star, yum!

A star has been spotted being torn to bits and devoured by a super-massive black hole — see the carnage!

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Casual Friday — Here Comes Solar Maximum

Wondering what’s going on with the recent spate of solar flares? Courtesy of NASA Television, here’s an excellent explanation of the solar cycle, and where we are in it…

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Casual Friday — how much does the internet weigh?

It all comes down to electrons (direct link): For an earlier estimate of this weight, you might want to compare this. H/T: Andrew Sullivan Possibly related posts (auto-generated list): Casual Friday — an early peek at the internet Casual Friday … Continue reading

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Casual Friday — fun and games with superconductors

A fun bit of video demonstrating the Meissner effect — the ability of a superconductor to float over (or if you prefer, under) a magnet…

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