Conversation

Malcolm Ocean in Berlin (37/100 vids)
@Malcolm_Ocean
Reminds me of lots of beaches in Nova Scotia where I grew up ♥️ Huge tides so we'd see a lot of wet rocks!
Quote Tweet
Malcolm Ocean in Berlin (37/100 vids)
@Malcolm_Ocean
·
Replying to @WeftOfSoul
Meanwhile I grew up a literal stone's throw from the bay with the highest tides in the world, so when I go anywhere with ordinary 2-4m tides it basically feels like there's no tides. Image below is not my hometown but I had to look for a couple seconds to be certain.
Image
1
2
otis 🌞 1/100 beats
@sokindling
Tides is something I've been meaning to look into How can the moon be so far away and be pulling such a huge amount of water this way and that? Something doesn't add up
2
2
QC (in Berlin 7/29-??? w/ COVID 😷)
@QiaochuYuan
here’s another thing that confuses me: in most places the tides are roughly in a 12-hour cycle, meaning 2 high tides and 2 low tides a day (“semi-diurnal”). the naive analysis using the fact that the moon orbits about once a day would suggest that it ought to be about 24 hours
1
3
Mark Moon
@eka_mark_moon
Spacetime (whether a la Newton or Einstein) comes equipped with a connection, which distinguishes inertial trajectories (& thus inertial frames). In a spacetime chart "attached to" a rotating body, the matrix-valued connection 1-form is nonzero. No need to appeal to other bodies.
3
1