🧵 Experimentation
Anonymous at Tue, 12 Mar 2024 09:55:46 UTC No. 16069789
What are good science experiments to do at home ? I have access to a 3d printer and home depot if necessary. I'm much more of a math guy but I've always wanted to test quantum phenomena at home without needing a atom smasher 3000. Any recommendations ?
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Anonymous at Tue, 12 Mar 2024 09:30:39 UTC No. 16069762
Someone explain electromagnetism to me. What the fuck is it. Why is there two forces combined into one that act PERPENDICULAR to each other. Wtf. Doesn't make any sense.
Also why the fuck is there positive/negative, north/south. What the fuck you mean repelling force. Gravity I get ok? Mass curves spacetime and therefor things fall towards the center of mass. But what the fuck is a negative charge and why does a negative charge move away from it. And what the fuck is a magnetic "north" anyway and why the fuck does it have no affect on electric charges, but actually it does when it moves. W.T.F.
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Anonymous at Tue, 12 Mar 2024 09:15:46 UTC No. 16069750
>be told by 4chan that nikola tesla is keanu chungus and Epic Win
>read about edison and tesla
>tesla wasn't really a part of the current wars, was a much bigger self-promoter and con artist, and save for a few productive years (ironically spent working for edison) he wasted his life ranting about nonsense
he also seems like he would've 100% posted here and would've been very annoying
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Anonymous at Tue, 12 Mar 2024 09:07:51 UTC No. 16069746
How can we assess that IQ tests are accurate when you can train yourself to get higher scores? In pretty much any assessment we usually need to recognize a consistent pattern to make an accurate diagnosis, however it's possible for a person to get better at IQ tests the more they take it, thus could perhaps prove that IQ tests aren't very accurate since you can end up with different scores the more you practice on it.
It may be true that some people are naturally smarter or dumber than others, but even if that was true, we still have a limited and/or a somewhat inaccurate measure of intelligence, and our best measures of intelligence are IQ tests. However, IQ tests are fragile in terms of scoring and not consistent the same way you can measure other things like height, weight, etc.
🧵 minimum colony size to avoid technological collapse
Anonymous at Tue, 12 Mar 2024 09:07:40 UTC No. 16069745
we discover a planet far away that is exactly like earth but without humans. we want to create a colony that can sustain itself without reverting to the stone age. how many people are needed at minimum? we can define criteria for success as follows:
>success
tech development restricted by population growth.
knowledge: enough to earn a minor in math, physics and chemistry.
industry: can produce power tools, motor vehicles (especially for logistics and mining) and synthetic fertilizers. a power grid is available.
>failure
tech level will likely recover in a few millenia or even a few centuries.
knowledge: written language, metalworking, creating buildings, some basic math
industry: can produce iron tools
>total failure
tech level may recover in a few tens or hundreds of millenia.
knowledge: how to hunt and gather
industry: fuck all. weaving baskets i guess
this article claims that 110 people can sustain a mars colony with a "successful" technological base (though it leaves some questions unanswered): https://www.nature.com/articles/s41
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Anonymous at Tue, 12 Mar 2024 06:50:18 UTC No. 16069632
Space will be found out to be discrete.
🧵 computers are unable to align entire human genome
Anonymous at Tue, 12 Mar 2024 05:25:17 UTC No. 16069568
its amazing how few people know this but computers cannot do an alignment of entire human genome against some other similarly sized animal genome (like some lizard that would be a very distant relative of humans, or maybe a mouse that is much closer relative than any lizard are)
human genome is 3 gigabytes, mouses are 2.7 gigabytes (and 21 chromosomes where as human has 24)
a computer cannot align two files that are that huge
alignment means a human has a gene sequence of lets say AAATTGGAA and a mouse has AAATCGGAA, a computer tries to align them and finds out for these parts TT is changed to TC but otherwise this piece was identical
then it is put into format
AAATTGGAA
AAATCGGAA
and computer continues to build it until it reaches full 3 gigabytes
the problem is no computer is able to do it, they run out of memory or if not, the task that started in 2016 is still ongoing with no end in sight..
however mitochondrion of animals is much smaller, in fact almost entire mitochondrion as written text (gene sequence) fits on a full screen in 1920x1080 resolution if font size is 10 (in this we presume you have hit enter to end a line of text when its about to reach notepads width so that a new line begins)
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Anonymous at Tue, 12 Mar 2024 04:47:31 UTC No. 16069528
When refilling a drink cooler / chest / esky with ice and the water is still cold. Is it better to dump the cold water before adding ice?
Is it better to have more total mass of cold water and ice, or will the cold water make the ice melt faster and drop temperature faster? Or does it not matter either way.
I think it's better to have more mass of cold water/ice as it will melt the ice but lose overall temperature at a slower rate in the long run due to containing it in a wider volume. Thoughts?
🧵 So like how C.C.R.U. made some progress, and C.C.R.I. made some progress
Make peace, not pieces, ? at Tue, 12 Mar 2024 04:28:56 UTC No. 16069500
What do You recommend andor can comment in regards to A.S.T. (Applied Sim Theory) (in Reality)...?
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Anonymous at Tue, 12 Mar 2024 04:05:22 UTC No. 16069472
Reminder that science considers IQ tests legitimate.
🧵 What do y'all think abt the Green Wall in Africa?
Anonymous at Tue, 12 Mar 2024 04:02:59 UTC No. 16069466
I'm mostly a math type of guy, so i know nothing abt environment and shit. What do environmental scientists think abt this wall?
🗑️ 🧵 Apparently science proved that karma exists?
Anonymous at Tue, 12 Mar 2024 03:28:42 UTC No. 16069427
So what, I literally can’t even kill myself without repercussions? What the fuck are we living in hell? I was actually going to kill myself until I read this shit.
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Anonymous at Tue, 12 Mar 2024 03:26:54 UTC No. 16069423
would it be possible to fire a laser at a solar panel in a vacuum and get back 100% of the energy?
🧵 Can anyone make sense of this?
Anonymous at Tue, 12 Mar 2024 02:57:19 UTC No. 16069375
"Persistent and to the point as the number 89"
Not much more I can add.
🧵 Sodium intake
Anonymous at Tue, 12 Mar 2024 02:56:06 UTC No. 16069373
Is it true that you need to have a low sodium diet to be healthy? The food industry has lied about lots of things pertaining to healthy diets. For example, seed oils as a replacement for natural fats. How much sodium is really bad for you? How do we know it causes cardiovascular issues?
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Anonymous at Tue, 12 Mar 2024 02:30:05 UTC No. 16069338
Is linear algebra the computer science of math?
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Anonymous at Tue, 12 Mar 2024 02:23:51 UTC No. 16069330
I find it almost impossible to get out of bed, why does this happen to me? What is the science behind it?
🧵 Thermodynamic computing
Anonymous at Mon, 11 Mar 2024 23:04:41 UTC No. 16069094
https://twitter.com/Andercot/status
🧵 Can all sensation be reduced to just pain and pleasure?
Anonymous at Mon, 11 Mar 2024 23:00:02 UTC No. 16069081
basically everything is muh feels, even seeing and hearing. everything can be reduced to either pain or pleasure in what we call consciousness.
seeing and hearing, your brain modelling the world is just computational pain and pleasure.
pleasure is the lack of stimulation (opioids reduce activity) and pain is stimulation (too much light, too much pressure etc).
as to what qualia in it self is, is a different topic.
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Anonymous at Mon, 11 Mar 2024 22:45:17 UTC No. 16069056
Why does everyone repeat the lie that two objects of different masses fall at the same rate, when this is clearly false? It cannot be true, and you don't even need to measureme to prove it.
Ah, you'll immediately leap to crying, but we've done tons of experiments dropping a small lightweight ball, and a large heavy ball, and in a vacuum without wind resistance they experience the same force of gravity and therefore fall at exactly the same rate! If you make one heavier, it just has more inertia, so it cancels out. Right? Wrong!
Because you're only taking the attraction of the Earth on the ball into account, and not the other way around. Gravity is universal, each of the balls is also attractive the planet. Consider this: On the moon, objects fall slower, because the moon has less mass. How about Jupiter? Jupiter isn't quite a solid, but if we imagine it as a compact ultramassive little guy, clearly anything dropped on Jupiter would drop ultra fast. So.. what happens if you drop the Earth on Jupiter? Or Jupiter on the Earth? Hmmm? Would it fall at the same rate? Cause after all, everything dropped on Earth falls at 9.8m/s^2 right? Except.. stuff dropped on Jupiter drops MUCH faster. Including the earth. So effective a super massive body is falling *onto the Earth* faster.
So back to our mismatched balls(heh). They're both attracting the Earth to themselves, so they're each helping to pull the earth towards each other, albeit at sliiightly separate angles (cosθ!) What if you dropped each one on opposite sides of the Earth, equidistant, assuming perfect spheres and no outside forces etc etc? Well, what happens if you drop Jupiter on one side of the Earth, and a tiny steel ball on the other? The Earth's gonna get pulled a hell of a lot more by Jupiter than the ball! Of course, the ball is pulled by Jupiter too, but inverse square law.
Ergo we see it plainly: the idea that objects of different mass fall at the same rate is FALSE, and anyone perpetuating it is a LIAR.
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Anonymous at Mon, 11 Mar 2024 22:28:09 UTC No. 16069012
What are some of the weirdest math problems?
One of my favorites is the "how many different ways can you draw N circles" problem which is an unsolved problem for N > 5. You are basically asking how many different ways can you arrange four circles for example. If the circles intersect is dome different way, or perhaps they are nested differently, that counts as a new way to draw them.
The numberphile video: https://www.youtube.com/watch?v=bRI
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Anonymous at Mon, 11 Mar 2024 22:01:55 UTC No. 16068967
What's up with physicists hoping for the fall of AI? Are they jealous?