Archive for the '–' Category
interesting email service (related to clara/x.ai)
June 29, 2019Beacons How it Works– Rocketbook
June 24, 2019Rocketbooks for whiteboards…
https://getrocketbook.com/pages/beacons-how-it-works
The scoop on cyber crimes
June 22, 20192019 redefinition of the SI base units – Wikipedia
June 22, 2019https://en.wikipedia.org/wiki/2019_redefinition_of_the_SI_base_units Kg in terms of photon energy and time
(4) Novelty Cool Tubular Groaning Toy Noise Stick – YouTube
June 21, 2019https://www.youtube.com/watch?v=GdNJfbPnlQ8
From Science Museum
“Listen as the plug slides inside the tube — The pitch will rise as the resonant column of air gets shorter and fall as it gets longer. ”
Crookes radiometer – Wikipedia, the free encyclopedia
June 21, 2019QT:{{”
When a radiant energy source is directed at a Crookes radiometer, the radiometer becomes a heat engine.[citation needed] The operation of a heat engine is based on a difference in temperature that is converted to a mechanical output. In this case, the black side of the vane becomes hotter than the other side, as radiant energy from a light source warms the black side by black-body absorption faster than the silver or white side. The internal air molecules are heated up when they touch the black side of the vane.
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