4 ms·
To make it even more concrete: realize that the hour hand on a clock moves 6 degrees per minute (it takes 60 minutes to go all the way around, 360 degrees). Th
by jwmerrill 7y ago
To make it even more concrete: realize that the hour hand on a clock moves 6 degrees per minute (it takes 60 minutes to go all the way around, 360 degrees).
This study claims that variations of the earth’s magnetic field direction that are more than 100 times slower than this have measurable effects on the behavior of dogs.
- smoyer 7y agoI think you meant the minute hand? The hour hand moves 0.5 degrees per minute. I also think your parent comment meant arc-minutes.
- jwmerrill 7y agoYes, you’re right about the minute hand. Oops. “arch minute” is a term used in the article, but “arc minute” also sounds more standard to me.
- thaumasiotes 7y agoFor a correspondence that makes more historical sense (while still not actually matching), you can assume that in one minute (of time), the sun travels 15 arcminutes across the sky. (21600 (arcminutes in 360 degrees) / 1440 (minutes in 24 hours) = 15)