My physics teacher takes the spherical roast beef as an example for heat convection.

This is some bull

One of the cool facts about gravity is that the gravitational field of a body 'feels' spherical at a distance, even if those bodies are not spherical themselves. There are higher multipoles but they are increasingly suppressed the further you are from the body. So at least for gravity the spherical approximation turns out to be good and justified.

• DroneBetter

  today at 3:50 AM

  for simulating gravity in particular you can do one better, since a sphere is in turn gravitationally indistinguishable from a point mass due to the https://en.wikipedia.org/wiki/Shell_theorem#Force_on_a_point...

  • naklitechie

    today at 5:04 AM

    This deserves a simulator

  • lhd1

    today at 4:05 AM

    and you can do one better than that - Birkhoff's theorem, the relativistic analogue of the shell theorem.

    https://en.wikipedia.org/wiki/Birkhoff%27s_theorem_(relativi...

Anna Cramling, women’s international chess master, should review this paper, having popularized the Cow Opening.

Hmmm… Today is Sep 1st, not Apr 1st. That cow is a bit out of season :)

• jitl

  today at 2:45 AM

  > Submitted on 1 Apr 2025 (v1), last revised 1 Apr 2026 (this version, v2)

Submission history

From: Benjamin Lehmann [view email]

[v1] Tue, 1 Apr 2025 07:55:39 UTC (2,401 KB)

[v2] Wed, 1 Apr 2026 12:28:24 UTC (3,845 KB)

What udder nonsense.