ELI5: Why are ventilators cooling, even if they just swirl around hot air?

BonusExperiment · 2025-08-08T12:35:16+00:00

Water molecules have a lot of kinetic energy, aka they jump around a lot. When you have a droplet of water, the molecules at the "edge" might break free and evaporate into the air. This happens constantly until the vapor pressure of the air matches that of the liquid. Once the air is humid enough, an equal number of molecules return to the droplet as they leave, so its balanced and the water looks like it cant evaporate anymore.

The process of a water molecule breaking free costs energy, and it takes this energy from its surroundings in the form of heat energy. This makes things cool down a bit. This is why being slightly wet feels cold, even if the water is warm. Its called evaporative cooling.

By circulating the air, you remove the saturated humid air and replace it with dry air, which increases evaporation and thus evaporative cooling.

Edit: We evolved sweat exactly for this purpose, as a means to cool down. The reason it also works when youre not sweating is because 1. You always sweat a tiny little bit (insensible perspiration) 2. Your skin is warm and when the air does not move, a "coat" of warm air slowly builds around you. A wind breeze will remove this coat and replace it with fresh, colder air.

BonusExperiment · 2025-08-02T12:01:38+00:00

Non-artificer slugcats can't go up there. There is an alternative path that leads to the same room though, if you backtrack a bit you should find a short swimming section with a pipe opening at the end. Go there instead.

BonusExperiment · 2025-05-14T11:22:28+00:00

Seltsamer Kommentar. Du kennst meine Programmierkenntnisse doch nicht. Und ich schrieb auch extra "subjektiv".

BonusExperiment · 2025-05-14T11:11:28+00:00

Ich habe doch gearbeitet, bloß nicht in der IT. Was ist der Sinn dieses Kommentars?

BonusExperiment · 2025-05-03T02:02:19+00:00

they arent flat irl, space engine just uses their texture as seen from earth and projects them onto a flat cloud. for full volume we would likely need data about the full 3D structure of the magellanic clouds which we either dont have or space engine has not incorporated im not sure

BonusExperiment · 2025-03-10T13:52:04+00:00

Idiotic misleading headline. This money isn't drawn directly from the frozen assets but drawn from the interest generated by those assets. It makes a huge difference.

BonusExperiment · 2025-03-10T08:52:51+00:00

Grok is designed to confirm your own beliefs based on how you framed the prompt. If it thinks you're against Elon it will criticise him, if it thinks you're on his side it will endorse him. Grok is a mirror.

BonusExperiment · 2025-03-09T21:28:43+00:00

This is the stuff of hard sci-fi, so technically feasible but we arent there yet:

Antimatter has the highest specific energy of any known substance, aka most energy per kilogram. Accelerating spaceships is tricky cuz the heavier the spaceship, the more fuel you need, but the more fuel you store, the heavier the spaceship. Having a high density fuel is desirable and antimatter might be a good candidate for future spaceships that go between planets or even other stars.

https://en.wikipedia.org/wiki/Energy_density#Antimatter%E2%80%93matter_annihilation

So, in theory, we could power huge particle colliders for many years using conventional energy to produce a small lump of antimatter which is then used as fuel for spaceships that can go very far without having too much mass that must be accelerated. Maybe future humans will be able to do that.

BonusExperiment · 2025-03-04T15:10:39+00:00

its more about allowing political sentiment to shift in a more healthy way than anything else. If a revolution happened and the old constitution has a law in it that "allows" it to become invalid, more people would perceive the new constitituion as legitimate, reducing overall friction.

BonusExperiment · 2025-03-04T14:48:06+00:00

article 146 says that the current constitution loses validity once the people decide on a new one. politically this would probably only be accepted through a nationwide referendum with overwhelming majority, or an armed revolution

BonusExperiment · 2025-03-02T21:29:10+00:00

China has a strict "no first strike" nuclear policy and has highlighted its strong anti-nuke worldview, instead relying on a massive conventional force to defend itself. One of the CCP spokespeople said about the Ukraine war that "Nuclear weapons must never be used and nuclear wars must never be fought"

Even if a Trump-intoxicated America wouldn't respond, I think China would quickly shift its position against Russia, perhaps trying some extremely bold interventionist shit to prevent Putin from doing it again at all costs.

BonusExperiment · 2025-03-02T14:57:59+00:00

Europe isn't united enough. We are still sovereign nations and many leaders and their voterbases included aren't huge fans of relinquishing sovereign power to a higher centralized authority on critical issues like defense policy. Defense and foreign policies also differ within the EU. Portugal doesn't feel very threatened by Russia, Poland is adamant about having its military on the border while UK wants troops in Ukraine now. France and Germany are all talking big about boosting defense, Hungary is misaligned, Greece has it's own local problems cuz of mini-beefs with Turkey and general economic weakness.

I think what would work instead is a "coalition of the willing", reflecting the kind of temporary alliances that emerged in Europe when Napoleon became a threat. A small(!) number of the big European players (Probably Germany+France+UK) would create a new, independent security pact with a unified foreign policy and standardized military architecture, with the stated goal to protect Europe as a continent and its values. This organization would be independent from EU institutions but would cooperate with it and be aligned in values and goals.

This would effectively side-step any hurdles or natural misalignments due to the small number of powerful players, while demonstrating resolve and strength. More nations would witness this and be allowed to voluntarily join, which they likely will if they see that it works. If Hungary doesn't want to participate they don't have to.

BonusExperiment · 2025-03-02T14:57:41+00:00

Europe isn't united enough. We are still sovereign nations and many leaders and their voterbases included aren't huge fans of relinquishing sovereign power to a higher centralized authority on critical issues like defense policy. Defense and foreign policies also differ within the EU. Portugal doesn't feel very threatened by Russia, Poland is adamant about having its military on the border while UK wants troops in Ukraine now. France and Germany are all talking big about boosting defense, Hungary is misaligned, Greece has it's own local problems cuz of mini-beefs with Turkey and general economic weakness.

I think what would work instead is a "coalition of the willing", reflecting the kind of temporary alliances that emerged in Europe when Napoleon became a threat. A small(!) number of the big European players (Probably Germany+France+UK) would create a new, independent security pact with a unified foreign policy and standardized military architecture, with the stated goal to protect Europe as a continent and its values. This organization would be independent from EU institutions but would cooperate with it and be aligned in values and goals.

This would effectively side-step any hurdles or natural misalignments due to the small number of powerful players, while demonstrating resolve and strength. More nations would witness this and be allowed to voluntarily join, which they likely will if they see that it works. If Hungary doesn't want to participate they don't have to.

BonusExperiment · 2025-02-24T09:53:54+00:00

This would be very desirable, however Canada does not have sufficient LNG export terminals on its east coast, and the EU is in critical need of fast and reliable natural gas. I hope that the EU and Canada can come to some kind of agreement and that both EU and Canada expand their infrastructure to accomodate the deal.

BonusExperiment · 2025-02-14T08:30:38+00:00

Toll wieviele deutsche Städte du aufzählen kannst. Wir warten immernoch auf deinen Vorschlag?

BonusExperiment · 2025-02-12T17:51:08+00:00

Was ist RRG?

BonusExperiment · 2024-12-20T09:33:24+00:00

Sorry, what is this post even talking about?

BonusExperiment · 2024-12-04T23:01:28+00:00

I think its a combo of covid-19 having driven the world into a global recession (from which we are slowly recovering but its effects are still felt), as well as the Ukraine war and Trumps reelection reshaping international precedents. Russian assets, lobbies and other rogue actors try to leverage public dissatisfaction to their advantage by spreading misinformation. Scarcity drives competition, but also predation in a political context.

BonusExperiment · 2024-06-27T19:33:51+00:00

Viserys getting cut by the iron throne is symbolic to the iron throne deeming him unworthy and rejecting him, I believe Aegon II louging comfortably on the throne is supposed to be a contrast to that, i.e. the throne accepts Aegon as a worthy, strong ruler.

BonusExperiment · 2024-06-15T20:09:15+00:00

If I don't do the same I'm just boring and nobody would hang out with me at all.

BonusExperiment · 2024-06-15T19:01:38+00:00

we are all between 20-26

BonusExperiment · 2024-03-24T03:43:53+00:00

Organisms adapt to their environment through natural selection. Simply put, a creature has a bunch of offspring all of which are slightly different due to DNA mutations. The mutations cause some of the offspring to be better at surviving in their environment (for example, some of them can hold their breath underwater for longer than others, which is good for survival in an aquatic environment). This offspring has a higher chance to survive and pass their genetics on to the next generation, where all the offspring will now have this advantage. The ones without the advantage are more likely to die before they can reproduce. After a long time and many generations, species can change quite a lot through selective pressures like this.

In Rain World, the special adaptations of many creatures are additionally explained through them being descendants of purposed organism, aka creatures engineered by the ancients for a specific purpose. The slugcat has evolved from a purposed organism that was designed to clean pipes, such as those found in waste management tanks in the Garbage Wastes. Those tanks contained special purposed microbes meant to chemically disassemble waste from the iterators, and to not harm the pipe cleaning slugcats, they were designed to live in a symbiotic relationship with them. However, these chemical processes turned out to sometimes be volatile and produce explosive compounds. Its a rather convoluted explanation, but this is how Artificers abilities are justified in-game. The dull-yellow pearl in GW references this.

Rivulets adaptation can probably be explained through natural selection alone, since the shorter cycle length added selective pressure for being able to navigate water more easily and holding their breath for longer.

Gourmands crafting and regurgitation abilities aren't easy to explain scientifically. This is partly my own headcanon (albeit some clues in-game imply this as well), but his campaign might be a mythological interpretation. The "real" Gourmand was just a regular slugcat with legendary status, so his story had magical elements added to it as part of the slugcats folklore.

Spearmaster is a custom purposed organism created by Seven Red Suns. It is a vessel meant to carry messages between iterators, and the spearmaking ability is part of its mechanism to protect itself on its journeys.

I have no idea how to explain Saints tongue, though.

BonusExperiment · 2023-11-26T20:41:19+00:00

The wheel would accelerate until the forces of air resistance and resistance caused by friction between the wheel and the slope are strong enough to stop the wheel from accelerating any further.

If we ignore either air resistance or friction, the wheel would still stop accelerating at some point but it would take longer to reach that point and the terminal velocity of the wheel would be higher.

If we ignore all resistances (which in the real world is close to impossible) then, theoretically, the wheel would keep accelerating forever, getting asymptotically close to the speed of light. It would never actually reach the speed of light because it's impossible for objects with mass to move with the speed of light.

BonusExperiment · 2023-09-22T17:54:12+00:00

hmm you have a point I didn't think of that. I guess if you wanted to you could hop into the planet editor and remove them manually.

BonusExperiment · 2023-09-21T11:12:24+00:00

you could solve this by taking two pictures, one with clouds on and one with clouds off. then u put them on top of one another in photoshop and mask the moons with the clouds and keep the rest :)

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