Archived threads in /sci/ - Science & Math - 55. page
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Okay, guys. Interesting physics question that I made up.
I don't know the solution yet. Consider the following situation. If you want, please submit anything that you want, but don't be idiots. Maybe anything arithmetic, too? Stuff you'd see in highschool textbooks, but problems you'd actually like to solve out.
Here's my problem:
VY Canis Maioris is a very large Hypergiant, and is one of the largest known stars. Pretend it exists a few light years away, and its relative velocity to our solar system is ~+20,000 meters/second initially....
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>>8156926
Constants/info:
(Law of universal gravitation)
F=(G*m1*m2)/r^2
(Gravitational constant)
G=6.674e-11 nm^2/kg^2
Mass of the Sun: 1.989E+30 Kg
Mass of the earth: 5.92E+24 Kg
Mass of VY Canis Maioris: ~5.96E+31 Kg
Earth's mean distance: 149,597,870,700 meters (1.5E+11 m)
Velocity of Sun: 220,000 m/s (Relative, zero.)
Velocity of VY Canis Maioris: 420,000 m/s. (Relative, 200,000 m/s)
The velocity of Earth: 460 m/s.
Approach angle of VY Canis Maioris: 3π/2 (270°)
θ1 of the Earth:...
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>>8156970
Really fuckin difficult mode: Include planetary interaction in this. Oh, god.
>>8156970
Distance to Canis Majoris or gtfo.
https://www.youtube.com/watch?v=fEE55gcttqo
fucking give this guy some credit already
this is NOT bait, lets go build a fucking computer out of this shit.
>>8156804
Oh hey, that's the guy who I first heard of this shit from like 5 years ago. I'm interested in it in a number-theoretic sense, but I forgot how much of a crackpot he really is, decimal worship and math realism.
>>8156818
everyone has his flaws, noone is perfect.
only together can we materialize what bright minds can think up. Maybe some of them worked alone but almost all of them had help.
so why not put his crackpot theories under a real test at least, not just bashing.
he also posted that magnetocaloric effects make for a better freezer than gas compression, there is already a company producing it.
He may not be a dope engineer but this vortex math is very implementable.
>>8156846
Are you saying this guy was a pioneer magnetic refrigeration?
Why does some anons on /sci/ hate the concept of RF resonant cavity thruster and the other anons endorse it?
>>8156205
Old conflict between conservative and liberal scientists
>>8156205
Because it's /x/ material at best. People including NASA tried it and failed. The power output you get from cavity resonance thrusters are a fraction of the power you put in.
>>8156234
>NASA tried it and failed
It produced thrust. You seem to have an odd definition of success.
![image002[1].gif](https://i.imgur.com/zuvqBtP.gif "image002[1].gif")
>Can /sci/ recommend any good books on bottom-up approaches to nanotechnology?
I'm an undergrad researcher in the middle of my second project and am pretty certain that nanotech is the broad field which I want to go into and probably get my Master's through related research.
I'm trying to narrow down specific sub-fields that I'd like to work on in the future and bottom-up manufacturing is one that really appeals to me from the reading I've done so far.
But I'd like to explore the topic further and...
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Bump, just got home from work.
It appears that bottom-up manufacturing may not be a topic with sufficient interest on this board, so feel free to discuss anything nanotechnology related in here.
>>8156661
Yeah I was kind of disappointed that /sci/ wasn't a faster/more popular board.
I'll bump your thread with some nice elliptic paraboloids, since it is actually useful and not blatant shitposting b8. Hope you find what you're looking for.
>>8155882
engines of creation by k eric drexler
or go watch one of his lectures, he's all about the bottom up approach
2+2=4
do you have any hard math problems?
>>8172669
1+1
>>8172669
Use chords to split a circle into equal area pieces that are all non-congruent with each other
>>8172673
1+1=2
proof?
>State your career/major and explain why you went into it
>>8167599
>math/phys
i think it's interesting, and it has been so far
Biochemistry and molecular biology/biotechnology.
I like drugs.
not trying to be edgy here but do you ever think about how dumb the average person is?
>>8163435
Intelligence =/= knowledge
>/thread
>>8163435
The average person will surprise you when they momentarily overcome their apathy.
Yes.
https://www.youtube.com/watch?v=shcrw2vtmJU
This is neat. And pointless.
But still neat.
The the whole 88-key keyboard only covers 88/100ths of an octave? Weird. Why not start with the standard 12 steps on an octave and divide those in half 3 times to get 12*8=96 steps per octave? Maybe it doesn't matter as it would sound similar.
>>8160923
This is acoustic 96 tone piano. But very rare https://m.youtube.com/watch?v=IEnlgXFAfd4
![3094428-borg-cube[1].jpg](https://i.imgur.com/5sAWWXm.jpg "3094428-borg-cube[1].jpg")
>What would happen if an object was massive enough to exhibit gravity, but was not spherical or disc-like, akin to the natural heavenly shapes?
Say there was a huge cuboid, like a cosmic sheet of paper, massive cylinders and pyramids, or more complex shapes like post-modern "art" (Or a space highway?).
Also let's wave our wand and say these things are sturdy enough to not collapse in on themselves.
>What would the orbits of those things look like?
>>8164923
The same as any other object. The shape is irrelevant
>>8164923
why does it need to be huge? It would have a better chance of not collapsing if it was small.
their orbits would be exactly the same as those of a sphere with the same center of gravity.
They could be spinning like mad doe.
>>8164926
Not if the orbits are close to the surface
>The team responsible for China's Long March 7 launch has an average age of 25 y.o
https://m.youtube.com/watch?v=uFO8hnSWy3Q
So, what are you nerds doing with your life?
>>8163203
>So, what are you nerds doing with your life?
Teaching calculus and getting drunk a lot. I'm 25 btw.
>>8163203
I rather work for elon musk making proprietary software than working for Chin Chong get paid so shit that I cant even afford proper dental care or clothes while flipping through declassified apollo 13 documents to piece together an aluminum trash can I call a rocket
Alright, reading a paper, and I witness this
>F : R → C
Now I wouldn't go bother you to figure out what does this mean, however google does not work for these things. I only need a phrase or something to google to look it up. Any help ?
>Pic related: It's the context
>>8169154
F is a function from the real numbers R to the complex numbers C
>>8169156
I am thankful
>>8169154
https://en.wikipedia.org/wiki/Function_(mathematics)#Notation
Idk if this is the right board for it this but why is pedophilia considered a mental disorder by the DSM if homosexuality isn't? There seems to be a lack of consistency. In my personal opinion, any deviation from the sexual norm, except fetishes, should be called what it is, a disorder. If being gay was the norm, maybe being straight would be a disorder, but the reality is that the if everyone were gay, humans wouldn't exist for very much longer.
>>8163722
>but why is pedophilia considered a mental disorder by the DSM if homosexuality isn't?
Because one is socially inappropriate on rational basis and the other is is socially inappropriate on the basis of prejudice.
Don't worry. When Shillary gets elected, pedophilia will not be a crime or a mental disorder any more.
>>8163722
I don't think pedophilia is a sexual disorder. I think there are just uncaring monsterous people out there targeting peoples kids and daughters for their own pleasure. Disorder or not, it definitely doesn't go into the same drawer as homosexuality. I think most of these are cultural and/or based on the individuals history but letting pedophiles go rampant is not up to negotiation.
How does smoking affect so many systems at once? What's the pathway between lung damage and nicotine in the bloodstream, and things like multiple sclerosis or decreasing bone density?
>>8163482
Nicotine isn't the main culprit, it's all othe other chemicals inside the cigaret.
>>8163482
The idea that smoking is this bad for the human body is vastly overrated and likely being pushed by pharmaceutical companies that don't want to understand the actual reason for most of these diseases, which is diet and/or genetics. Perhaps even environmental location as well.
Anyway there's a general since people on /sci/ are apparently tired of multiple smoking conversations in different threads.
>>8163485
I know of nicotine, carbon monoxide, and various carcinogens and metals. But still, how does that get from point A to point B? What's the pathophysiology of it?
It's official, GB is out.
What does this mean for science and education, does it get affected?
>does it get affected?
Yes.
>>8161569
how?
>>8161572
EU funding and attracting top scientists/engineers to UK. You can probably find a good article now that it's happened.
Should I worry about this /sci/?
I have a little fusion reactor I built. Powers my house. I intermittently get high random readings like this that disappear within minutes.
False alarms? I've checked the whole thing top to bottom with a real geiger counter and havent been able to find any leaks.
>>8149729
>>8149730
>>8149732
Last one at the moment.
