Like most kurzgesagt vids, I thoroughly enjoyed it, despite its dark subject. Here's a discussion from 2024 over the nature paper. https://news.ycombinator.com/item?id=42094573

Scientist treated her own cancer with viruses she grew in the lab (248 comments, 2 years ago)

Old news, I know but writeup has interesting bit about vortex stretching leading to local velocity amplification.

Lemme do the ironic thing here:

https://claude.ai/code/artifact/8cbd2369-0099-41ae-bb78-49d7...

"I am the Lorax," he said, with a shout. "I'm the Lorax who speaks for the trees, which you seem to be chopping as fast as you please!"

>Earlier https://news.ycombinator.com/item?id=49638280

Btw, we are f*cked. Like what worthwhile human endeavor is left if not the 'pursuit' of higher truths. Eat, shit, sleep shag, then the reaper's bag.

This assumes a fixed jet injection/intake vector... It's a floppy assumption at best, shaky at worst.

When ya hafta go.. Ya go.

Is gearing up or down, with a fixed power budget, a valid example in the strict sense? Genuinely asking.

No. A gear train is just a transfer of force/torque. It's analogous to a simple lever for rotational motion. Mechanical impedance is almost always referring to harmonic forces (think of spring systems and structural dynamics). Impedance in fluids also fall under mechanical impedance but it's usually classified separately as acoustic impedance.

I think what they're getting at, and is valid, is how the speed/torque relationship is similar to voltage/amperage. There's nuance which can separate those ideas.

That's a pretty decent example IMO.

> write the formulae you were supposed to memorize on your tits

Mnemonic devices. Oh, the privilege.

I too liked the detour about cheating.