At around 1:20 in my lecture, I mentioned Feynman's interesting comment about boundary layers. He asks why fan blades are always so dusty, despite spinning so fast. Answer: in the boundary layer, the breeze slows down and stops! https://t.co/0ks26IHW9epic.twitter.com/utlggHbrth
If you listen closely, this chap is actually outlining a very sensible public R&D policy in which central banks use quantitative easing to invest in fundamental research into clean energy generation and revolutionising the environmental impact of flight. https://t.co/hNVingHWp7
Wouldn't it be much more fun if the earth orbited a triple star system? No years, unpredictable seasons😯, random daylight hours, utter chaos, and some very very hot weeks!! 😳 Simulation made with @geogebra (NSolveODE at its limits !!!🧐). pic.twitter.com/geylUpfpeJ
