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Germanium is the only stable element named after a country. The others -- francium, polonium, americium, and nihonium -- are radioactive.
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Indium was not named after India but after indigo, from the blue color in its spectrum.
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Gravitational attraction of stars and cows https://www.johndcook.com/blog/2018/03/28/cow-astrology/ …pic.twitter.com/UTsARaoNYS
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The hypocenter of an earthquake is the point below the earth's surface where a fault rupture begins.
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Science Tip Retweeted
Oldies but goldies: MacAdam, Visual sensitivities to color differences in daylight, 1942. Showed that color perception can be modelled using an anisotropic metric. https://en.wikipedia.org/wiki/MacAdam_ellipse …pic.twitter.com/2qpY16jPZC
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Remember: With great power comes great current squared times resistance.http://xkcd.com/643/
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Lorentz is the relativity guy. Lorenz is the dynamical systems guy.https://twitter.com/AnalysisFact/status/1221489162500608001 …
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Can Maxwell's equations be derived from Coulomb's Law and Special Relativity?https://physics.stackexchange.com/questions/3618/can-maxwells-equations-be-derived-from-coulombs-law-and-special-relativity …
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The middle size of the universe https://www.johndcook.com/blog/2010/11/15/the-middle-size-of-the-universe/ …
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If a credit card won't read when swiped, does wrapping it in plastic actually help and if so, why?https://physics.stackexchange.com/questions/7426/if-a-credit-card-wont-read-when-swiped-does-wrapping-it-in-plastic-actually-he …
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Immanuel Kant proposed the nebular hypothesis of solar system formation in 1755.
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Science Tip Retweeted
An elegant representation for putting them all to scale https://buff.ly/2M2NsYF pic.twitter.com/MNq7XwyFsU
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For any magnetic field B, you can find a vector potential A such that B = curl A.
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Science Tip Retweeted
Kiwis lay the largest egg in relation to their body size of any species of bird in the world. It can weigh as much as 450 g: if we compare that proportion to humans, it would mean giving birth to a fully grown 4 year old kid https://buff.ly/2vKfxd9 pic.twitter.com/F6nAU01kTU
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Take chances, make mistakes, and get messy https://www.johndcook.com/blog/2010/12/10/magic-school-bus/ …pic.twitter.com/yj24L1iS7m
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Science Tip Retweeted
New post: Remember complexity https://www.johndcook.com/blog/2020/01/16/memento-complexitatis/ …pic.twitter.com/wx9RTHHnj6
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'The role of the infinitely small is infinitely large.' -- Louis Pasteur
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Differential equation for charge in a circuit with inductance L, resistance R, capacitance C, & voltage source E.https://www.johndcook.com//eqn/lrc_ode.html …
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Science Tip Retweeted
This is a short-tailed fruit bat Carollia perspicillata at the embryonic stage https://buff.ly/2NSTng9 pic.twitter.com/QNPfwvaDZy
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