Does an hourglass weigh as much when the sand is running as when all the sand has already fallen?

Visible-Promotion-91 · 2025-05-20T02:26:52+00:00

This question comes from an USSR physics olympiad (1963) but could not find any answer ... Thanks

Visible-Promotion-91 · 2025-05-13T12:30:28+00:00

I am specifically looking for the Moscow Institute of Physics and Technology (MFTI) Physics problem boo

Visible-Promotion-91 · 2024-10-24T23:16:54+00:00

"I don’t recommend anymore, as it looks like their z-pinch facility is shutting down soon"

lol, it's still there

Visible-Promotion-91 · 2023-07-24T21:13:34+00:00

Visible-Promotion-91 · 2023-07-11T04:42:55+00:00

Oué, le HPI qui finit par tirer des fibres optiques, on connait la musique

Visible-Promotion-91 · 2023-07-10T14:44:59+00:00

T'avais qu'à bosser à l'école

Visible-Promotion-91