Using a fast-pulsing laser, physicists have recorded the first moments of electrical resistance, the friction that generates heat as electricity travels through circuits.
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Happy autumnal equinox: here's a year of sunrises | Bad Astronomy | Discover Magazine - 0 views
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You Khan't Ignore How Students Learn | Action-Reaction - 0 views
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The speed of light in a material | Matter & Interactions - 0 views
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Awesome idea for warm-up questions via blog - 0 views
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Just doing what makes sense. - Crazy Teaching - 0 views
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