activity

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TriColour LED Flashlight Keywords: activity, battery, breadboard, circuit, colour addition, LED, resistors, switch, tricolour LED

Make your own TriColour LED Flashlight!

This is a straightforward classroom or summer camp activity to teach students simple circuitry and the addition of colours. The students can go home with a useful and energy-efficient flashlight.

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5 years 39 weeks ago
Radioactive Milk Keywords: activity, dose, nucleosynthesis, Radioactivity

Milk contains enough radioactive potassium-40 to set a Geiger Counter humming. But it didn't come from Fukushima, or any human activity.

Milk (and own bones) contains a lot of ancient radioactive potassium-40, which was made in a supernova explosion about five billion years ago.

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6 years 7 weeks ago
Laminar (Un)mixing Keywords: activity, fluids, laminar flow, mixing, reynolds number

"Unmixing" a mixture is impossible, right? So what's going on here?

Find out how to construct your own "(un)mixing" demonstration and learn about how it works here.

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4 years 23 weeks ago
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