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P2 Charge formula and questions
P2 Ohms Law formula and questions
How do we know what the stars are made of when we've never been to one? Dr Andrew Steele shows us how to make a spectrometer, a device used by scientists to analyse light, using a cereal box and a CD. Credits Written and presented by Andrew Steele Videography by Tom Fuller and Andrew Steele Telescope images courtesy of NASA, ESA, Hubble, AURA/Caltech
n this video we take a look at a really important area of radioactivity. It's called "half-life" and it can look a bit tricky. But don't worry, it's actually quite straightforward. And it frequently comes up in exams.