4 ms·
Er, this is easy. By the time it rotates 90 degrees, it's upside down. So, two full turns.
by wrycoder 3y ago
Er, this is easy. By the time it rotates 90 degrees, it's upside down. So, two full turns.
- psychphysic 3y agoScientific American is on the same trajectory as the History channel. I'm just assuming this is clickbait and will keep an eye out for the archive link.