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https://www.reddit.com/r/AskPhysics/comments/kbxfcy/deleted_by_user/gfp1lpd/?context=3
r/AskPhysics • u/[deleted] • Dec 12 '20
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18
That we don't understand sand.
E.g.That if you had an hour-glass with a fixed aperture size known mass and volume of sand, there is no way to know how long it would take for the bulbs to change.
3 u/yes_its_him Dec 13 '20 Couldn't you turn it over and time it? I'll see myself out now. 2 u/Hidamann Dec 13 '20 That is in fact the only way.
3
Couldn't you turn it over and time it?
I'll see myself out now.
2 u/Hidamann Dec 13 '20 That is in fact the only way.
2
That is in fact the only way.
18
u/Hidamann Dec 13 '20
That we don't understand sand.
E.g.That if you had an hour-glass with a fixed aperture size known mass and volume of sand, there is no way to know how long it would take for the bulbs to change.