This man needs a genius grant, and this is about the 6th time I've thought this. Any one of these pages would be a feat, an achievement to be proud of, but as a collection, it forms one of the greatest educational resources of its type that I have known. These things can give you more intuition about a subject in 45 minutes than a textbook might be able to in 3 months, because it's interesting and not dry. I wish I h…
For the HN crowd who like to roll with JS turned off, you’re missing out on great interactive illustrations.
It's pretty much the ideal for how JS should be used.
This man needs a genius grant, and this is about the 6th time I've thought this. Any one of these pages would be a feat, an achievement to be proud of, but as a collection, it forms one of the greatest educational resources of its type that I have known. These things can give you more intuition about a subject in 45 minutes than a textbook might be able to in 3 months, because it's interesting and not dry. I wish I h…
I saw your comment and was like: "wait a minute... surely its not the same guy as the mechanical watch thing, is it?!?!?!" Absolutely blown away. As someone with a "design for learning" degree which I've found to be rather useless, I'd gladly have traded by dozens of thousands of dollars for a chance to learn with this guy. The technical sophistication combined with the incredibly didactic and clear flow of his work…
I took one look at the animation sliders and knew it was the same guy who did the mechanical watch thing
I agree with parent comment. This man should be given funding to do this for the rest of his life.
I haven't taken beyond high school physics, so this question is probably obvious, but I haven't been able to find the answer (probably don't know the right terms to search). When I increased the slider that allows you to change the flow of time for the gas in the cube, it really looked like visualizations I've seen of increasing the temperature of a gas. Is there a deeper relationship here? Could an observer tell the…
The thing is, temperature is just motion at very small scales. On a solid, particles are attached to one another via the atomic forces, and a "temperature increase" means that the particles are jiggling more. With high enough jiggling, the particles start to break apart and the substance undergoes a phase transition. Now, when it's a gas, the particles are jiggling so much they aren't attached to one another, they are flying around at very high speeds as shown in the visualization. So, your intuition is correct: increasing the speed of the particles then is in fact the same as "increasing the temperature" of the gas.
I was surprised by how much I was surprised by the very first fact -- that air molecules move around at extremely high speed of 450m/s, but just bump into each other cancelling this speed out, and this speed is based on pressure & temperature. And it's due to this speed, despite air's low density, the force air exerts is enormous -- equivalent to 10 tons per square meter. Somehow, the human sandwich does not explode…
>this speed is based on pressure & temperature
I'd say that pressure & temperature are a consequence of the speed, not the other way around
This man needs a genius grant, and this is about the 6th time I've thought this. Any one of these pages would be a feat, an achievement to be proud of, but as a collection, it forms one of the greatest educational resources of its type that I have known. These things can give you more intuition about a subject in 45 minutes than a textbook might be able to in 3 months, because it's interesting and not dry. I wish I h…
Pretty much, I'm scrolling for few minutes and every demo is more impressive than the previous one.
And the part about sound bouncing in the room is basically "acoustic room design 101" and beautifully illustrates how shape and dampening of the room can massively change how it sounds
Incredible work as always, thanks Bartosz. Interesting side note - using the "basic" frequency/amplitude slider section, you can tell if you have any hearing loss in a certain ear at a certain frequency, as well as high frequencies in general. As an ex-musician, I have some hearing loss caused by playing and being around extremely loud music. Between 6KHz and 7KHz, I felt the sound shift towards my right hear, indica…
> Interesting side note - using the "basic" frequency/amplitude slider section, you can tell if you have any hearing loss in a certain ear at a certain frequency, as well as high frequencies in general.
If you're on headphones maybe but might "only" be shit speakers
A cool physical sound apparatus is a speaker port. This is the hole(s) you may find in some speakers. https://blog.fluance.com/wp-content/uploads/2021/05/Ported-V... Is the hole to help get the sound out..? No. As this article shows you, the speaker already moves back and forth, this will create changes in pressure yada yada. The speaker port is not just a hole, it’s a tube. The air in that tube has a mass and due to…
To elaborate, the tube is tuned right below where in closed box the speaker would lose efficiency, so the frequency shift is 180 degrees, and as it takes air from behind it (which is shifted by 180 so it gets to 360 total). But that causes the frequency curve to drop steeper below that.
There is also variant of that where instead of pipe hole there is an extra passive membrane
I haven't taken beyond high school physics, so this question is probably obvious, but I haven't been able to find the answer (probably don't know the right terms to search). When I increased the slider that allows you to change the flow of time for the gas in the cube, it really looked like visualizations I've seen of increasing the temperature of a gas. Is there a deeper relationship here? Could an observer tell the…
basically, make a standing wave of gas in a pipe and the peak of pressure will be hotter than the valley. Put the thing you want to cool in the valley, radiator in the peak, and voila, a heat pump.
Audio is not working for the three keys on iOS. Amazing content as always otherwise.
I'm not getting any audio on Linux/Chrome (Debian.) No audio from this page either https://d21u3ic0kp9e91.cloudfront.net/choir/04/index.html , much to the dismay of our grandchildren. I checked system audio settings and see nothing muted.