Episode 19: Angular Momentum - The Mechanical Universe

[@kamalsheets6015]

1: Johannes Kepler, 1571 - 1630 2: The shape of wine barrels 3: Astronomy 4: The Earth 5: A vortex 6: L = Angular Momentum 7: Conservation of Angular Momentum: As the ice skater is spinning with no torque, as she pulls in her arms her whole body spins faster to conserve angular momentum. 8: The Great Red Spot 9: There was a major conjunction of superior planets, but the old Aristotle tables were a few days off, and the newer Copernicus tables were even more so. This inspired Tycho to create better measurements 10: Tycho's careful measurements in his systemic observations of Heavenly Bodies gave much more exact predictions of the locations of said Heavenly Bodies. Stay healthy folks.

[@dansoong5907]

thanks

[@klever3155]

ur a g thanks bro

[@marc-andrebrunet5386]

I incline myself in front of you Sir

[@marc-andrebrunet5386]

It's the most hypnotic series I ever seen ❤

[@dickiegreenleaf750]

Brings me back to PBS in Chicago. WTTW and WYCC. Childhood flipping channels and later saw them still playing when I was in city college

[@afonsodeportugal]

11:17 Visualization of Johannes Kepler’s three laws of planetary motion. 13:20 Visualization of the Kepler’s law of equal areas (swept by the vector connecting a planet to the sun in equal times) 16:23 Explanation of why planets orbiting the sun and vortices are not subject to twist forces. 17:29 Proving that _r_ x _F_ is the derivative of angular momentum _L_ ; since _r_ x _F_ = 0, _L_ is constant, i.e. angular momentum is conserved; _r_ x _F_ is the twisting force, called torque _τ_ , the rate of change of _L_ 19:13 Using the right-hand rule to calculate _L_ ; visualizing why the orbital speed of a planet increases as the distance to the sun _r_ decreases (Kepler’s second law). 22:23 How the conservation of angular momentum shapes the galaxies in the form of a disc

[@gamermonster6351]

What's your age? Btw how can you comment on every Mecnical universe video?

[@afonsodeportugal]

@@gamermonster6351 I'm Gen X. I left these notes mostly for myself, so I can quickly access the relevant parts of each video whenever I want. Satisfied, Mr. Nosy?...

[@Telencephelon]

@caltech Can you do an AI upsampling / upworked series?

[@brainstormingsharing1309]

Absolutely well done and definitely keep it up!!! 👍👍👍👍👍

[@jamesbentonticer4706]

0:00 Intro music Your welcome

[@OnlyStudyJEE2025]

Kepler was a menace IRL 😭😭

[@goosew3266]

This is so annoying. Whoever put the Annenberg Media logo at the front of these videos really made a mistake. It throws the whole audio off the video. I have watched these lectures more than once, so I know there was not always this Annenberg Media introduction. Can someone please put it back to what it was?

[@0.618-0]

Superb.

[@universocalculado4639]

Lamentavelmente , esse princípio da conservação do momento angular não é ensinado nas escolas , nem mesmo é citado nos livros de física do ensino médio . É interessante ver que a segunda lei de Johannes Kepler ( a lei das Áreas iguais ) é , apenas uma conseqüência da lei de conservação do momento angular e , que essa lei dá forma ao sistema solar e a todas as galáxias inclusive a Via Láctea . Há mais uma coisa , um furacão de fogo é algo muito apelão hein !

[@421sap]

In Jesus' Name, Amen. God bless you ✨✝️

[@unclerojelio6320]

I wish these could be remastered. They sound awful.

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[@GalileanInvariance]

Tovah, you need to lay off the Manischewitz wine a little bit, don't you think?

[@brainstormingsharing1309]

Absolutely well done and definitely keep it up!!! 👍👍👍👍👍👍