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If Mars had never lost it's magnetic field, would it be the second habitable/inhabited world besides earth?
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>>7705824
Maybe. But from what we know a solar system can not have more than one habitable planet in it.
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>>7705839
Why not?
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>>7705839
Dubious.
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Hey /sci/ I use to hate math as a passion.
Recently though I've learned why I hated it so much. It wasn't because I found it boring or anything like that, but when my teachers told us how to do formulas, they never told why they work. I discovered this recently when I found out what makes pi so important.
Now I'm wanting to get into physics and would like some suggestions on books I should pick up.
I also have zero experience with physics.
Pic unrelated
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>>7705820
feynman lectures
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>>7705820
most of the math used in physics is butchered to the point that you have no idea where it came from. just an honest heads up.
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Look up Young & Freedman's University Physics. It's great for beginners and covers quite a lot of subjects.
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Does anyone else read Geometrical/Mathematical proofs?
Like Euclid or Archimedes?
I'm going to ask for The Works of Archimedes for Xmas, has anyone read?
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>>7705790
Why would you read any mathematics more than ~200 years old for any other reason other than to stroke your ego?
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haven't extensively read it but my favorite topic in math is geometry and I enjoy their proofs
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>>7705809
If you enjoy proofs don't read non-rigorous, obsolete shit.
Prove e=mc^2 isn't a sexed equation
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>>7705740
>>>/reddit/
sage
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>>7705740
>sexed
What?
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The speed of light is privileged above other speeds, therefore discriminates against the majority.
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Democracy got owned by mathematics:
https://en.wikipedia.org/wiki/Arrow's_impossibility_theorem
Why would anyone support this shitty system which goes against basic logic and mathematics?
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Tradition is a incredibly powerful thing.
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>>7705698
It's really only relevant to democratically planned economics. What do you think it means for a presidential election to be pareto optimal?
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>Voting systems that use cardinal utility (which conveys more information than rank orders; see the subsection discussing the cardinal utility approach to overcoming the negative conclusion) are not covered by the theorem.
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Good day /sci/!
I need your help. I was really sick for the past 2 weeks and had to miss most of my classes. My math professor (precalc) did a quiz and let me to it at home since I couldn't attend. I wasn't in class while they covered this material, and forgot it since a while back in highschool. Can anyone please solve this one and if possible explain briefly how they did, so I can use this as an example? Thanks anons
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Underage & b8. Gtfo homework faggot
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>>7705695
I'm 21, and I covered this material when I was 17
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>>7705703
You could always try googling how to do it? This is easy stuff
http://www.bing.com/search?q=phase+shifts+of+trigonometric+functions&FORM=AWRE&PC=CY06
Honestly why even post on 4chan? Would it literally not be easier and quicker to just Google it?
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What is your favorite branch of mathematics and why?
Mine would be Real Analysis because my first courses of real analysis were the first courses I ever enjoyed.
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>>7705628
What qualifies as "Real Analysis"? Sequences, set theory, etc.?
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Topologyyyyy
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>>7705634
I would say sequences, limits, continuity smoothness, series, integration derivatives DEq...
Basically Calculus with all the theorems to construct it properly
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So /sci/
I can't live at peace not knowing or understanding space. I find it scary how we're 99.9% sure that life outside of our solar system exists but we are yet to come across it, or interact with it.
Space is so vast and planets/solar systems are so abundant that even in millions of years we would not be able to explore even the planets within our own galaxy.
Is there any scope whatsoever about intergalactic travel within the next millennium? Are we the most sophisticated life forms in the universe? Do other universes exist? Will we ever travel inside a black hole? Could we master high speed travel and essentially travel into the future of the Earth?
I have so many questions and every night I look up at the night sky and pray that one day I understand who we are and what part we play in grand theatre of the universe and space-time. Maybe one day we will understand this all, maybe even within our life time. I have sleepless nights most the time and even if I do sleep, its nightmares about what exists beyond our atmosphere. I need answers.
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AHAHAHAHAHAHA
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>>7705580
sorry, what part do you find funny?
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>every night I look up at the night sky and pray that one day I understand who we are and what part we play in grand theatre of the universe and space-time.
Pray who? God?
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I think that the extraordinary claim is that life only exists on Earth because it's magic pixie dust.
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>>7705528
Show me an alien. Without evidence, aliens are no better than hobbits, ghosts or unicorns.
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>>7705532
probabilities etc. no reasonable man believes aliens have been to earth, but life probably exists somewhere else in the universe etc. I took the bait and so on. Sage for shit thread an what have you.
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Some people have trouble believing that there's water on Mars.
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Say I have a 800m-diameter, 200.000 Tons O'Neill cylinder that I want to make rotate at about 0.4 rev per minute.
How would I do that ? I'm talking about ways that already exist nowadays
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>>7705520
easy, just attach it to the thumb you currently have jammed up your ass twisting uselessly..
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>>7705520
>How would I do that ?
Rockets is the solution to anything that involves movement in space.
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>>7705520
Attach to 8kw motor for 1 hour.
Add power corresponding to friction torque.
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Dumbest moment in science?
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>>7705493
check out the guy who put lead into gasoline for an entire career of it..
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ftl neutrinos
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>>7705493
when they found out that quantum mechanics destroys the laws of logic
Given a length of exactly 3 minutes, how many different songs could possibly exist?
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A lot
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>>7705383
Depends on bitdepth and sample rate.
If you're talking about a more "analog" delivery / medium, not even modern physics knows the answer to that. Though you could, and likely would, take average data about human perception and human ear function, and derive an answer based on that.
It would only be an approximation.
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Aleph 3
the powerset of the powerset of countable infinity
Anonymous
How is time travel actually possible?? 2015-12-07 10:53:55 Post No.7705380
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How is time travel actually possible?? 2015-12-07 10:53:55 Post No.7705380
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How is time travel actually possible??
Anonymous
2015-12-07 10:53:55
Post No. 7705380
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Is there any scientific evidence that Time Travel is actually possible?
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you're doing it right now
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ofc possible but not yet.
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>>7705380
Depends how you define time travel
Anonymous
Adenosine receptor activation research? 2015-12-07 10:39:36 Post No.7705366
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Adenosine receptor activation research? 2015-12-07 10:39:36 Post No.7705366
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Adenosine receptor activation research?
Anonymous
2015-12-07 10:39:36
Post No. 7705366
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is there or has there been any research projects into creating a stimulant that could activate the neuro receptors that allow the flow of adenosine so a person could forego sleeping while feeling alert?
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>>7705366
There's been a pretty decent adenosine antagonist around for a while. Caffeine.
Valerian root for the inverse, although some of its constituents also active GABA-A.
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>>7705366
I could not help but notice your gif was not optimized anon.
I have optimized your gif.
Your gif is now optimized.
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Anonymous
Relativity in engineering 2015-12-07 09:07:57 Post No.7705264
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Relativity in engineering 2015-12-07 09:07:57 Post No.7705264
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Sup /sci/
From the little information I've had on the subject, the GPS was the first engineering project where relativity had to be taken into account. (I'm not taking into account scientific projects focused on the subject).
As of today, are there other projects where it is needed? For example did it matter for the SR-71 Blackbird or for modern missiles? Modern satellites? Anything else?
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It helps to estimate the pre-launch adjustment of the clocks, but that's about it. No orbit is exactly circular, the field is not exactly spherical and all orbits change over time. The real operational adjustment is done periodically based on comparison with a group of ground-based clocks, not based on theory.
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>>7705342
Interesting, thanks.
I thought that the internal clocks were set to operate at a slightly different rate than on Earth, not that they corrected them periodically.
Any other systems where relativity needs to be taken into account?
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>>7705357
They do tick slower. From what I've read they adjust to effects from special relativity using an onboard computer; effects from general relativity due to altitude changes might require more manual adjustments.