Heat “waves” detected moving through pencil lead

At relatively balmy temperatures, heat behaves like sound when moving through graphite, study reports From MIT: Exotic ‘second sound’ phenomenon observed in pencil lead The next time you set a kettle to boil, consider this scenario: After turning the burner off, instead of staying hot and slowly warming the surrounding kitchen and stove, the kettle…

via Watts Up With That?

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March 15, 2019 at 06:07PM

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