🌸🌹2ck 🌱🐇 @2ck@social.cleverlibre.org
A capable software engineer and aspirating (sic) cook. Also posting about space stuff (mostly NASA) occasionally
pronouns: he, him
Joined Apr 2020
Also used the same quantity of dough to make this ball. I assume it's basically a rock because of how dense it would be but IDK. I made it as a kind of joke.
These were supposed to be pretzels but they're mostly rolls instead cuz I'm lazy
"The Ultraviolet Catastrophe" would be a pretty good band name #physics #quantummechanics #humor
🌸🌹2ck 🌱🐇
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I did see one comedy sketch (from BR) where some farmer type lad started excitedly speaking in Boarisch at 200km/h and the subtitles changed to "Keine Ahnung. Ich verstehe kein Wort mehr".
OTOH the Boarisch version of Despacito (Des bassiert hoid) that is on Youtube has 100% correct subtitles which have been manually added...
🌸🌹2ck 🌱🐇
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First time creator,
although I have edited
many articles
🌸🌹2ck 🌱🐇
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Listen to an audiobook. https://librivox.org/ has free, public domain books recorded by volunteers.
🌸🌹2ck 🌱🐇
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This page will attract
people who are busy, or
lazy, or selfish
https://en.m.wiktionary.org/wiki/gigayear WotD? I didn't know SI prefixes were used for years : I've always seen bya (billion years ago). Not sure I've ever seen byo (billion years old) though.
This is fun little gem: a song about Quarks (not the Hank Green one)
🌸🌹2ck 🌱🐇
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@cryospheroid It's sort of understandable to get bored of melting ice caps, polar bears, and biodiversity in faraway rainforests. If people would realize it could be unbearable heating of their city or the collapse of their country, that's new and dramatic (to the global north). That ought to excite/spark interest. As an artist, I'd use it.
@leephillips I'm not trying to "explain" the subatomic with Maxwell... I'm just trying to understand how they relate. Like, I read that the transmission thru a medium is meditated by some process of absorption or "vibration" of dipoles in the medium: I want to understand how that transmission works and how it explains refraction, which phenomenon Feynman's lecture notes show me can be derived by modeling plane wave interaction at a boundary between two mediums using Maxwell's equations and some conservation laws. I think that's doable😅
https://www.macaulaylibrary.org/2021/06/22/behind-the-scenes-of-sound-id-in-merlin/
Cool idea, and a really natural application for ConvNets. I'll have to try this.
#birds #machinelearning #ML #audio #nature
🌸🌹2ck 🌱🐇
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How to calculate the power output of a nuclear reactor - just multiply coolant flow and temperature rise.
But how do you multiply two numbers electrically in a meter, in 1955, while using as little active circuitry as possible, ideally without digital logic, transistors, or even tubes? The answer is a Wheatstone bridge!
(Principles of Nuclear Reactor Engineering, Samuel Glasstone, 1955) #retrocomputing #electronics
@leephillips That helps. I hadn't thought of absorbing multiple photons - makes sense.
I'm trying to relate the "mechanics" of absorption and emission of photons to Maxwell's equations. I started with one of Feynman's lectures, but need some "guardrails" to avoid confusing or unrelated topics since I'm working backwards for things I don't know or forgot from high school and college. Maybe I just need to retake undergrad-level physics and chemistry 🙄
🌸🌹2ck 🌱🐇
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@2ck The light may not get emitted with the same frequency. If it did, there would be no greenhouse effect. CO2 leads to global warming because sunlight absorbed in the visible can be shifted to the infrared, which is blocked on the way out by the atmosphere. (It’s more complicated, but that’s the basic mechanism.)
🌸🌹2ck 🌱🐇
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@2ck The bounce/reflection changes the frequency depending on material, different frequencies are perceived as different colors by the receptors in the eye. The absorbed photons turn into heat, the ones which gives partial energy to an atom will be reflected at a new angle. The average frequency of all photons reaching your eye determines color.
🌸🌹2ck 🌱🐇
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@2ck The emitted photon is the same energy as the absorbed one only for single-photon absorption. An atom can absorb multiple photons, and then emit photons of any energy up to the sum of all the energies in the absorbed photons. So the emission spectrum is actually continuous. For molecules, there are various vibrational modes as well, and energy in those can be fed into translational energy, raising the temperature of the material.
I tend to hear #climatechange/global warming framed in terms of rising *average* global temperatures, but it seems like the numbers don't affect most people. Talking about single digit changes in degrees Celsius doesn't viscerally effect people who think in Fahrenheit and easily tolerate a few degrees up or down in their personal environment. I suspect the data about the tails of the temperature distribution may be more compelling. When every summer is the "hottest on record", that has to strike a chord.
#sciencecommunication #statistics
@leephillips OK. I think the part that tripped me up is that I read that electrons of individual atoms will emit photons with the same energy as they absorb; however, for the most part, we don't have free atoms. Molecules OTOH can do other things with absorbed energy....which has to do with bond energy, I think? Am I getting warmer?
A capable software engineer and aspirating (sic) cook. Also posting about space stuff (mostly NASA) occasionally
pronouns: he, him
Joined Apr 2020
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