3 ms·
> After about a year, atoms from your candle will have spread completely around the globe. How on earth is this provable?
by 600frogs 5y ago
> After about a year, atoms from your candle will have spread completely around the globe.
How on earth is this provable?
- Jabbles 5y agoProbably based on data from radiation leaks.
- tzs 5y agoIt seems plausible. Earth has a radius of about 6400 km. That makes half of the circumference about 20100 km. For something you release to spread all the way around the world in a year requires it to spread out from you at about 20100 km/year. That is about 2.3 km/hr, or about 0.6 m/s or about 25 inches/second. I've never tried to measure it, but my recollection of about how long it has taken after something nearby emits a strong odor for that odor to reach my nose is that the speed is in that ballpark.