Favorite tweets

Asked how fast we're spinning, we often say 1,650 km/h, but that's the equator's speed. You can do it for *you* by:
1. Google search your city's latitude, e.g. "London latitude" returns 51.5°
2. Then put that number in this: "cos(51.5 deg)*1,650"
3. It returns your speed in km/h https://t.co/jlnxRmRlU3

— Dr James O'Donoghue (@physicsJ) November 28, 2019

via Twitter https://twitter.com/physicsJ

November 28, 2019 at 06:53PM