Is there a deeper reason for why the rational numbers don't have the least upper bound property, or is it just the way things are?
>>7807022
excellent question! after thinking about it for a while, i'd say it's because you can define some bounded subsets of Q (:= the rationals) via properties that are too "strong" in some sense for Q, i.e. using operations that Q isn't closed under.
what i mean by that is: if you characterized sets only via properties like "x being small than q" with fixed q in Q, then you wouldn't feel the need for those irrationals inbetween. but the moment you permit properties like "x*x being smaller than 2" [which is essentially the same as saying x<sqrt(2)] characterizing sets, you use language that Q wasn't constructed for. Q, as a field, is closed under addition, multiplication, and respective inverses (save 0, obviously) - but it is not closed under sqrt or limits. yet math allows to define subsets via such properties.
well, that's the best insight/perspective i can come up with, anyway.
>>7807243
This would be my train of thought, but [math]\mathbb{Z}[/math] is also not closed under operations of that sort (e.g. sqrt) yet satisfies least upper bound property.
>>7807022
>deeper reason
gtfo
>Voyager I is still 300 years away from the Oort Cloud
>will take ~30,000 years to get through it
Why do we even try as a species?
>>7804829
I feel the same way some times to be honest.
Can't we at least genetically engineer some self propogating space whale or something? I don't want an undetectable chunk of metal to be our only legacy.
Kill yourself.
>>7804829
The Voyager probes were not created to leave the Solar System, you autismal dimwit.
The worst combination:
Introvert in Biotech
You are forced to become friendly with a group of people (that may or may not rotate shifts at ungodly hours) that are 100% confirmed normies that went to college and enjoy a white collar lifestyle. You have to work in pairs and teams for long shifts and constantly watch one another and verify one another's work.
You MUST be part of the pack and you MUST love football...or else you are a weirdo.
Oh, and don't worry. Diversity quotas make sure that there are PLENTY of women at work, too!
>>7803647
>complaining about getting to meet women
lad
>>7803655
I actually not sure if the woman part is sarcasm or he actually means it
i'm interested in becoming an engineering technician. it's a 2 year degree and apparently you can paid like 75k/year. thing is, can i go back and become a legit engineer? do i have to take a full program or can i get equivalency? am i forever a trade slave? i'm torn up about making money but i'm worried about my education. doing CAD stuff is nothing new to me. i want to be able to study fluid mechanics later on.
thoughts?
im worried are IQ testes legitamate /sci/?
should i kill mesell now ill never be smart ?
Don't kill yourself, world needs dumb people too. Not everyone has to work in NASA, we need burger flippers as well.
>>7807151
How the fuck do you even score less than 100 in that test?
80% of it was fucking obvious shits.
Well, even if the result is true, you shouldn't kill yourself. Not everyone is meant to be a scientist. You can find other job and be successful at it.
Don't listen to the /sci/ elitist.
>>7807160
>How the fuck do you even score less than 100 in that test?
By being in the bottom 50% of test takers.
hurrr
How do I write the square root of 2 as a fraction? And don't tell me I can't.
7/2
it's right there in the symbol retard
root(2) / 1
>>7805380
This
Are things they have showed in movie THE MARTIAN possible, actually i wanna know the answer from physicist or cosmologists , i have just very basic high school level physics knowledge so couldn't guess that it was either so well written/filmed bullshit/fanatsy or there may be possibility of humans inhabiting mars
You can have an isolated zone fed with water and sunlight, and if the temperature or air pressure doesn't prevent anything, you can grow vegetables. Also you need the right fertilizers, which I'm not sure if hjuman shit alone would be enough.
>>7802340
Human feces often carry nasty pathogens. So if you're going to fertilize with man-manure you better use only your own.
>>7802316
most of it was worked out on the author's blog long before the Martian became published. One exception: the original storm could not have been strong enough to knock over the return capsule. The martian atmosphere simply isn't thick enough, even it it picked up dust and sand. They only did that in the movie and book to make an initial crisis to set up the rest of the story.
What would happen to a beam of photons if it were passed through a micrometer sized gap between two non-magnetic, perfectly conducting plates (undergoing the Casimir Effect) placed in a vacuum?
Why hasn't this experiment been done before?
Btw im a girl :)
I don't think you understand the casimir effect. Also, they're called waveguides and are quite common.
Am i supposed to believe that Cal Berkeley is miles better than Oxford and comparatively better than MIT at physics?
>>7809217
IDK, what's in the methodology tab?
Yeah dude. Oxford and MIT have totally gone downhill. They're pretty much trash schools now, their degrees will be completely worthless in a few years.
>>7809217
Oxford is kind of shit for natsci and MIT isn't know for physics either only engineering.
Hey guys. So where do you all go to find hard-to-find e-book versions of upper level math and science books? I have always been able to find my books until this year; can't find my Abstract Mathematics book. I was just wondering if anyone knew of any sort of mathematics/physics/chemistry textbook repository like deal.
Pic related, no matter how hard I try I can't find this fucker.
http://gen.lib.rus.ec/
the book you want isnt on there but it took 2 seconds on google
http://ebooks.sohuvv.com/search.php?req=A%20Transition%20to%20Advanced%20Mathematics&nametype=orig
apply yourself
>>7809210
Thanks for the link. Not to be ungrateful about the second part of your post, but that book isn't on there. The solution manual is, but I found that when I applied myself.
>>7809220
yes it is
click on [Download2] in the #4 row
then click [Download] in blue in the bottom right
then click DOWNLOAD
Can u guys post your college notes here?anything will do,please
Pic not related
>>7809124
thats some jr high school tier shit OP
>>7809163
He said pic unrelated. Could be a pic of a clown for all we know.
More if wanted
PDEs
If there is some kind of resistance in space that prevents the speed of light exceeding c, is it theoretically possibly to reduce this resistance to zero - kinda like how superconductors work?
what
No.
Thread over.
>>7809081
No. The thing that keeps the speed of light exceeding c is the fundamental structure of space and time. It would be substantially more impossible to make light exceed c than it would be to draw a circle with pi exceeding 3.114159....
if /sci/ is so smart can they solve this?
>>7808970
c=(b*d)/(ad+b)
>>7808970
[math]c=(a+b/d)/b[/math]
>>7808970
c=1/((a/b)+(1/d))
Hey /sci/ can someone tell me? I am really confused, and need to write a paper.
round up you dumb nigger
>>7808962
you misspelled 'wipe'
>>7808962
if 0.999999999... != 1 then how do you represent 1/3 in decimal?
The system of 12-month calendars, whether Roman, Hebrew or Islamic is stupid. The months change their starting day every year, there is incompatibility between USA and Europe about notation, and other problems.
So here's the alternative: the Quarterly Calendar. Here's how it works.
- There are four quarters to every year, referred to as North, East, South and West, or as 1, 2, 3 and 4.
- North, East and South each have 13 weeks. West has 13 or 14 weeks.
- The First of North is always the first Sunday in January.
That's it. Advantages:
- Every quarter has either 91 or 98 days. Thus we can standardize the written date once and for all as YYYY-Q-DD, where Q is 1, 2, 3, or 4 and DD is a number from 1 to 98.
- The 2nd, 9th, 16th, etc. of a quarter is always a Monday, the 3rd, 10th, 17th etc. of a quarter is always a Tuesday, etc. Thus if someone says "Tuesday the 11th of East" you immediately know the day and date don't match up and get them to correct it.
- "North" is the time of year when the weather is more characteristic of what it's like farther north. Same with "South". And... this works in both the northern hemisphere and the southern hemisphere.
- Businesses use quarters already anyway.
- Due to the "first Sunday in January" rule, there is an easy way for people to convert from the old way to the new way.
So? Ready to switch to the Quarterly Calendar?
Outside of your autism, what problem does this expensive update solve?
>>7808917
Reread the post and get back to me, o master insultor
>>7808917
>Um, er, I can't always remember how many days are in a month, or the number that goes with the month!!!
But for real though, if it wasn't expensive, there are much better ways of reorganizing the calendar, especially if you incorporate daylight savings time, leap years, and the Poole effect.
You know a square with a circle in it?
I just found its actuation with particle bounds.
Made me freak out a lot...
Kinda want to talk about it, kinda don't, kinda want to see if any of you are interested it how the concoction works; so I'm asking, just to ease the unease I'm having.
>>7808876
what the fuck ARE you? are you a bot?
>>7808881
He's schizophrenic. Just ignore him.
what is this nonsense OP you tremendous faggot
