Anonymous
Coil gun space launch system. Will it work? 2016-08-24 21:05:45 Post No.8294525
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Coil gun space launch system. Will it work? 2016-08-24 21:05:45 Post No.8294525
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Coil gun space launch system. Will it work?
Anonymous
2016-08-24 21:05:45
Post No. 8294525
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Would it be worth it to make a high altitude mass driver/coil gun space launch system? Build it around a mountain, for example. Do it at the high elevation and angle to minimize drag. And we'll need some ablator for sure.
I'm talking cargo, not humans.
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>>8294525
Maybe?
All the designs I've seen for this are usually floating tubes in the ocean attached to anchored facilities that look kind of like an oil rig. Coiled around the mountain is a new setup.
People might be able to survive the g-forces inside a pressurized breathing liquid.
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>>8294525
>Would it be worth it
What do you mean by "it", Peasant?
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>>8295550
He means at what point would the system pay for itself vs conventional launch methods
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Give it to me straight, /sci/, how long we got?
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It's probably nothing
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>>8310823
Well it's not like the world is going to end, it's just going to suck progressively worse.
Personally, I'm more worried that coffee will go near extinct.
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>>8310823
At current rate we'll hit 450 ppm CO2 around 2030. Then the world will heat by itself, even if we emit zero zip nothing.
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Hey /sci/, my mathematical knowledge is horribly limited. However, it's come to my attention that Order of Operations is kind of retarded? I saw this on zuccbook and gave this 'Engineer' a-talking to in the nature of Order of Operations and the actual answer (which you can still get by following that order).
Am I retarded and should just BTFO of math-related stuff?
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>Order of Operations is kind of retarded?
No, without it maths would literally not work
also the answer is 1
[math]
8\div2(2+2) \Rightarrow 8\div2(4) \Rightarrow8\div8 = 1
[/math]
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>>8308252
>order of operation is super important lads
>does it right to left
lel
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>>8308252
I knew the answer and you can get it by following Order of Operations but I mean; what do you do when it's ambiguous?
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Why do people question the Axiom of Choice? Banach-Tarski is nothing compared to what can do wrong without it.
[math] \bullet\ [/math] A real number can be in the closure of a set [math]X[/math] but not a limit of any sequence in [math]X[/math].
[math] \bullet\ [/math] There can exist a field with no algebraic closure. Furthermore, a field can have non-isomorphic algebraic closures.
[math]\bullet \ \ \mathbb{R}[/math] can be partitioned into strictly more than continuum disjoint subsets (!).
[math]\bullet \ \ \mathbb{R}[/math] can be a countable union of countable sets. Thus the theory of Lebesgue measure can fail totally (!!).
Math without choice is broken.
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>>8299231
Banach-Tarski isn't such a big deal. It's just people getting upset that their notions of volume don't carry over to non-measurable sets.
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I think you listed a bunch of results that can be proven once you drop the axiom of choice and instead add new axioms. (new Axoms that are inconsistent with choice and thus usually not adopted).
"Math without choice" is more constructive (in the technical sense of the word) and you will not suddenly be able to prove existence of "field with no algebraic closure" in the weaker framework.
Once you reject choice, you just can consider different theories (theories in which choice can be shown to fail). In those, stuff you listed may be true.
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Typical myopic mathematician.
Anonymous
Who invented the integers as we currently know them? 2016-08-30 15:48:57 Post No.8308722
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Who invented the integers as we currently know them? 2016-08-30 15:48:57 Post No.8308722
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Who invented the integers as we currently know them?
Anonymous
2016-08-30 15:48:57
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Today in my foundations class the professor constructed the integers. After class I asked him about who came up with all that, because last time he told us exactly who 'invented' the naturals, but he didn't know.
I googled it and I found some names of people in the 19th century who were interested in constructing the integers but not the name of the one guy who did this construction.
By the way, I am talking of the construction where integers are the equivalence classes of the set of naturals under the relation (a,b)R(c,d) iff a+d=b+c
Does anyone here know who invented this? /sci/ is my last resort. I really want to know.
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>>8308722
I meant equivalence classes of NxN , not of N
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>last time he told us exactly who 'invented' the naturals
What the fuck? Natural numbers have literally been known throughout the human history. I bet fucking cavemen were already like "one stick plus one stick is two sticks".
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>>8308732
The axioms of arithmethic that give rise to the naturals were made by Peano.
Anonymous
Serious question /sci/ 2016-08-29 10:36:29 Post No.8305787
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Serious question /sci/ 2016-08-29 10:36:29 Post No.8305787
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What will happen when millions of STEM graduates realise that the "STEM shortage" was just a huge meme and that realistically there are not enough jobs for the majority of STEM graduates?
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Mass suicide and unskilled labour boost
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Capitalism will collapse within our lifetime and we will inherit a world of glorious robo socialism.
The future is bright comrades.
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>>8305787
I have a job, so why should I care?
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Does Elon Musk deserve his popculture reddit hero status?
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>>8307513
He is one of the few billonaires that realizes mankid is caged awaiting to die and wants to do something about it.
He is a hero in his own right-
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>>8307513
he seems good desu
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He's not quite the super genius inventor that's going to save the world that reddit makes him out to be but he deserves MUCH more credit than half of sci gives him. He's not a genius but he's also not just a business man. He's got the right goals with the right people and works incredibly hard to do his part.
>professor tosses the prescribed textbook into the trash
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>>8305725
Professor of...?
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>>8305733
fiscal irresponsibility
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>3 professors tell us the textbook is useless for the course
>the other 2 tell us the get the textbooks
>they're available online
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Explain how anything can exist. I find it very odd that things exist.
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>>8311556
sage in all fields
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>>8311556
>I find it very odd that things exist.
Look about you, things clearly exist, the Universe has no rhyme or reason is just exists and science is solely based upon the observation of this reality, not to assign it some mystical existential purpose. In other words, an hero yourself, you personification of AIDs made manifest.
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>>8311556
Don't be a retard
The universe clearly exists
The fact that there are things in it is a judgement that your idiot brain imposes on the universe because it finds spatial awareness by means of 'separating this thing from that thing' conducive to navigation.
Objectively, the universe is just a soup of particles. If you consider that the universe doesn't exist for any reason at all, it shouldn't come as a surprise that the fact that "things exist in it" also is a fact for no reason at all.
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I'm certain that you, /sci/, of all people are capable of solving this simple problem.
Which sword has the highest Damage Per Second?
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Depends.
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>>8310170
They have the same of course. Which is more useful depends on the game you're playing.
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>>8310199
Anonymous
Ayyliens have finally been found? 2016-08-30 04:51:18 Post No.8307937
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Ayyliens have finally been found? 2016-08-30 04:51:18 Post No.8307937
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Ayyliens have finally been found?
Anonymous
2016-08-30 04:51:18
Post No. 8307937
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>Washington (AFP) - A "strong signal" detected by a radio telescope in Russia that is scanning the heavens for signs of extraterrestrial life has stirred interest among the scientific community.
>"No one is claiming that this is the work of an extraterrestrial civilization, but it is certainly worth further study," said Paul Gilster, author of the Centauri Dreams website which covers peer-reviewed research on deep space exploration.
>The signal is from the direction of a HD164595, a star about 95 light-years from Earth.
>The star is known to have at least one planet, and may have more.
>The observation is being made public now, but was actually detected last year by the RATAN-600 radio telescope in Zelenchukskaya, Russia, he said.
>"Working out the strength of the signal, the researchers say that if it came from an isotropic beacon, it would be of a power possible only for a Kardashev Type II civilization," Gilster wrote, referring to a scale-system that indicates a civilization far more advanced than our own.
What should our first message be to them?
https://www.yahoo.com/news/strong-signal-stirs-interest-hunt-alien-life-171536443.html
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>No one is claiming that this is the work of an extraterrestrial civilization
Except you.
Get off of this board,
nay, this website.
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>>8307940
scientist is clearly talking in circles so he doesn't get ridiculed in the media. but if you read between the lines, this is clearly another possible alien artifact.
this is another KIC 8462852 or Tabby Star that cannot be explained right now.
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>>8307937
>What should our first message be to them?
fuck off, space niggers. We're full.
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My girlfriend's family and my family are divided on this problem:
A man buys a horse for $500 then sells it for $600. He then buys the same horse back for $700 and sells it again for $800. What is his profit?
>My family and I say profit=$0
>Her family and herself say profit=$200
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>>8305336
Of course it's $0
Is your girlfriend retarded?
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>Buys horse -500
>-500
>Sells horse +600
>100
>Buys horse -700
>-600
Sells horse +800
>200
you made 200 dollars
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>>8305336
>my girlfriend's
You have to go back...
I hate biologists.
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75% of people that throw out statistics never provide a source.
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biologists > trash > mathematicians > physicists
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>>8302297
Don't really need a source for that
Consider the following:
100% of people who successfully commit suicide are dead
Anonymous
Some theory about simulated reality and the Doubleslit Experiment 2016-08-30 04:25:50 Post No.8307889
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Some theory about simulated reality and the Doubleslit Experiment 2016-08-30 04:25:50 Post No.8307889
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Some theory about simulated reality and the Doubleslit Experiment
Anonymous
2016-08-30 04:25:50
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Ok guys, I have a weird theory, and I dont know if it makes any sense, or if it just sounds good in my head, and I thought you guys could help me find out if it is an approved theory, or if there are any mistakes in my thinking process, or if its just complete nonsense. Its my first time here on this board so sorry if i commit any fauxpas.
I have no special education, am just a bit interested in science, so dont expect to much.
Its partly about the Simulated Reality Theory, which some physicist already approached
http://beforeitsnews.com/alternative/2016/02/wow-leading-nobel-physicist-we-are-living-in-a-computer-simulation-3309486.html
And about the Double-Slit Experiment.
So you know that we percieve electrons as particles when we "look" at them, but if you shoot them through a double slit they behave like waves. Except if you again look at them then again they behave like particles as we percieve them.
Now what if electrons are in reality not particles, but in reality a cloud, or blob like in pic related without the point in them, and constantly morphs really fast into all kind of forms. The reason we percieve them as particles is to make it easier to compute for the system (because it is easier to render a small ball then a superfast morphing and moving blob or cloud in realtime as far as my knowledge goes into computers). So when we look we force the electron into behaving like a particle in position of the center of mass of the blob (where the point in pic related is approximately) to safe workingmemory of the computer and it enters the nearest slit of where we percieve the electron. If we dont look at it, it can behave like it is normally coded, the blob, can split up and go through both slits. Through the Doubleslit Experiment we basically found a bug in the programm.
(to be continued)
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>>8307889
(Part 2)
You can extent that to the Schrödingers Cat Theory, where both states, dead and alive would be loaded while noone is looking (implying the cat itself doesnt count as "looking" or percieving) so in case that someone suddenly opens without any anticipation it can instantly show the right one and would switch superfast between both, and will be decided by the programm as soon as someone percieves the cat as either one.
If you made it until here you have my gratitude, and in case this theory will actually be a revolutionizing newthing (I can dream, right?), you can help decide a name (in case it will actually somehow go public) on it because I have no idea what you call it. Double Slit Bug doesn't sound so good, and i can come up with anything else.
So what do you think? Does it all make sense? What are the issues with the theory? And why is it complete nonsense?
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bumb
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Retard
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You guys are smart
http://bnonews.com/news/index.php/news/id5073
How did a lightning strike take out all these deers?
"More than 320 wild reindeer have been found dead after a single lightning strike struck a mountain plateau in southern Norway, local officials say, making it deadliest lightning strike ever recorded. (more)
"
https://twitter.com/BNONews/status/770019360845008897
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aliens
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>>8306446
A. It was a really big lightning bolt
B. They all had simulataenous heart attacks due to how close and loud it was
C. They were standing on material that was conductive
D. Herd Shock followed by exposure/predators.
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that's a shit load of deers