Archived threads in /sci/ - Science & Math - 260. page
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Why is the day length of Mars so closely similar to Earth's? The outer gas giants rotate very rapidly by comparison while the other two rocky planets rotate very slowly. Also the Martian axial tilt is about the same as Earth's. Was Mars also impacted in the ancient past by a large planetoid? Why doesn't Mars have a big moon like Earth then?
>>7974508
Mars was clearly designed by God to be our second home.
>>7974570
>implying we can live in a planet where water exists in gaseous form
>>7974601
You mean like clouds?
How do we know that stars/galaxies are redshifted? What lets us know that they should be more blue in the first place?
We know what the spectrum of a star should look like based on fundamental physics. For example, hydrogen absorbs light at specific frequencies, so these are well-defined "holes" in the emission spectrum of the sun. That alone provides a very precise measure for how red or blue shifted a source is. The fact that it correlates perfectly with the dozen or so other methods confirms it's not some other effect.
>>7974059
>expecting a flat earther to accept the scientific consensus on star spectrums
>>7974059
What if only our sun has this specific chemcial composition and all other stars are made up of completely different stuff we've never even discovered yet?
Why doesn't the electron fall on the proton? Every book just avoids the issue with "m-muh lowest possible orbital" that doesn't explain anything.
Its like how the earth doesnt fall to the sun. I just don't understand why when it reaches 0 Kelvin it doesn't fall to proton
It has to do with the strength of the EM field. If it were stronger then the electrom would orbit closer.
>>7973965
>implying there's such a thing as gravitational bremsstraluhng
Which language, besides philosophy, most closely resembles math?
The remaining everything else philosophy
>>7973360
>math is a language
okay
German
SOUP /SCI/ what was your definition of compactness? / define a compact set in your own words; feel free to define other terms as you please.
Example:
Definition: A set [math]E[/math] is [math]compact[/math] iff, for every family of sets [math]{G_α}_(α \in A)[/math] of *open* sets such that [math]E \subset \bigcap_(α \in A)G_α[/math], there is a finite set [math] {α_1, ..., α_n} \subset A[/math] such that [math]E /subset (/bigcup^n)_(i=1)G_α[/math]
A point is connected to a point if there is a path (obviously continuous) that connects them.
A connected set is a set where every point in it is connected to all other points of the set.
Inuitive and a rigorous definition in almost all contexts
A set [math]S[/math] is compact if and only if every sequence [math]s:\mathbb{N}\to S[/math] has a subsequential limit in [math] S[/math]
>>7973281
I think I like this the path-connected definition of connectedness the most
Any open cover has a finite subcover.
>>7973291
Sequential compactness (the definition you gave) isn't equivalent to compactness in general topological spaces (only in metric spaces).
Anyone here been to a math competition? I'm about to go to one and I don't know what to expect.
I went to one. I got dead last. It was very humbling because I considered myself decent at math.
Fucking Chinese kids lol
yup I did, it was 100 other schools, basic shit, shittiest team, 2 fucking stupid girls on my team. GG WP we lost, they never listened to me.
How do you even study for one? Do I just study everything up until and including DifEq? I am interested in joining one at my school but am not that great at maths.
Is helium exit tank suicide really painless.
If yes, why? Asphyxiation usually is a process of much sufferings. Does it have to do with helium being noble?
I am planning on exiting next weekend.
I fucked up my everything for myself financially, and my degree is a meme (cause my uni's a meme).
Please tell me if it's really fast and painless.
>>7971090
It should be. I'm also trying it, too.
t. physics student
>>7971086
It's not a regular asphyxiation. You are replacing air with an inert gas.
See, the thing is that your body cannot sense a loss of oxygen, only an increase of co2, which you are expelling via the constant flow of the exit bag.
Bored?
Why not watch a 9 minute video of a guy explaning the conditions at the launch pad during liftoff of a Saturn V during the Apollo 11 project (the one that first took humans to the Moon). The elapsed time is 30 seconds. It's pretty cool to see is slow-mo.
http://m.youtube.com/watch?v=DKtVpvzUF1Y
>>7970922
The guy's channel is rather interesting. Thanks, tripfag.
>>7970955
You're welcome. I forgot I was tripfagging.
And this is where they went: the Sea of Tranquility aka mare tranquillitatis.
What if Planet X is a small blackhole?
ur mom is a black hole
>>7969745
What could cause a black hole of that mass?
At what point does high IQ become detrimental? At 160 IQ for example (some people here claim to have this) people are complete social retards without fail. I've never seen an actual smart person not be autistic as fuck.
>>7975492
thats a monkey you silly cunt
John von Neumann had both a 1-in-100-years intellect (IQ >> 200) as well as an eiditic memory better than Kim Peek's, and he had no social abnormalities.
He actually hosted house parties almost every week and told lots of funny jokes.
If we eliminate the fact that higher IQ people can earn more money than lower IQ people then in today's society IQ becomes detrimental at about 85.
This is a bit philosophical, but I need to ask the science crowd.
I can't just "not think about it"
How do men of science and logic deal with the knowledge of the massive cosmic scale, the possibility that countless universes could be expanding,ending and beginning alongside us, dimensions beyond our comprehension or perception and the cosmic wonder all about us that we will never grasp. And how minuscule and pointless we are. Why does anything matter?
I feel like there should be something more. Like we're missing a puzzle piece
I'm...
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>>7975275
your other thread is still up - and will be for the better part of 24 hours even if no one bumps it - spaz
cause people long ago realised this and to stop mindless chaos they invented god
now we have a reason for existing and a reason not to do whatever we want
someone smart once said
"i dont fear death because i been dead a lot longer than alive so it cant be that bad"
just think when you die you'll go back to being what you were for the 14 billion years before u was born
on that scale you were never really alive in the first plase
Is chemistry the easiest subject from the hard sciences?
its the one with much knowledge by heart ... except simple anorganics.
it goes like this: maths>physics>Chem>bio
>>7974765
what about geology?
hey /scientists/, science amateur here I'm not really well versed or knowledgeable about science and physics , astronomy, biology, and metaphysical stuff, can some of you who know and understand science and physics explain to me the different theories and discoveries and experiments they have on things like multiverse, parallel universes, transcendence and multiple realities, I know science has its limits and their are very hard borders on what science can do or can't do or can show or can't show or can prove or can't prove. I know the universe is big and...
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is this a meme?
>>7974476
>I really want to know and understand this stuff.
Some of what you want (the nature of our existence and the like) is metaphysics and I can't help you very much with that. But if you want I can dump some online resources and text book recommendations. Also what level are you at?
>>7974476
I believe the bible explains all of this stuff very neatly.
How do you deal with the fact that most of problems in math are either solved or really hard? There's no room for research unless you're memechizuki or you're willing to think up and solve some irrelevant problem just to publish a shitty article that no one will ever be interested in
i was thinking about a particular problem for some time, today i made a google search and some faggot wrote down the same thing 100 years ago
>>7974424
>some faggot wrote down the same thing 100 years ago
lel, 3 hours in the library will save you 3 weeks in the lab
here's tao telling you you don't have to be a yokuzuna of math to contribute to the field
https://terrytao.wordpress.com/career-advice/does-one-have-to-be-a-genius-to-do-maths/
so stop sperging and get back to work
>There's no room for research
I dont think you should be in research
>>7974424
finding a new solution to an already solved problem is just as laudable
if your solution is neater, it may even find its way into textbooks one day
I have terrible discipline.
Tomorrow I want to try and do 8 hours of solid work, just because I don't think I have every done that before.
Tips on how to avoid procrastination/boredom?
How about you do four solid hours of work today and four tomorrow
>Tomorrow
Why not today? Answer: because that's not a realistic goal. Make a more modest plan that you will actually do, then gradually scale up.
