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Is 7 hours/night the minimum level of long-term sleep one should have?
Pic related from a study of the military
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my productivity hovers around 100 regardless of sleep, am i retarded
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>>8017717
I read somewhere that the grown adult needs exactly 7 and a half hours of sleep to function correctly
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>>8017717
What are 'rounds per tube'?
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how would u define math
what is it?
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Math is a model originating from the set of laws the the universe operates on.
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>>8017597
study of patterns
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>>8017597
Problem solving.
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sci if you could throw out mathemeticians like pokeballs to win arguments for you, who would you choose for the proof that
0.999... does not equal 1
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>>8017327
NJ WILD FUCKING BERGER
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Ted Cruz
the guy that proved 2+2=jesus
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Does Relativity prove that Isaac Newton was wrong?
The reason I ask is that I was arguing with people on Reddit who were claiming that Newton was wrong and that Einstein is correct. I was arguing that Newton couldn't have been wrong since his laws of motion are still used for basically everything, like statics/dynamics etc. Even Navier-Stokes and MHD are based on Newton's laws. If Newton is making correct predictions then how could he have been wrong?
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>>8017279
He was just wrong in thinking in a same pass of the time for all the universe. Einstein prove that it depends of the gravity. But since we're in the earth and the gravity it's the same talking relatively we can still using the Newton's laws.
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>>8017279
It would be like saying Eratosthenes was wrong because his calculation of the earth's circumference was out by 5 or 10%. Relativity calculations yield almost the same values as Newtonian calculations at non relativistic speeds. Newton did amazing for his time.
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I would not use the word "wrong" to describe Newtonian mechanics -- it makes fantastic predictions*.
* as long as the velocity is not near the speed of light.
Once your v approaches c, then you must use Relativity. But in our everyday world of very low velocity, of cars and airplanes, Einstein's equations reduce to Newton's equations.
Think of Newton's equations as the low-speed limit of Einstein's equations. Newton was not wrong in the low-speed context.
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How do you git gud at E&M?
I don't know why but I struggle with this more than any other physics course.
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>>8017267
Start with the first one (simpler than the last two) and find the derivation for that equation. Go through that derivation line by line ann ask yourself at each step: what is the physical meaning or interpretation of what you read.
Sure, the first one relates the electric field radiating out from a charge to the strength of that charge. True understanding takes a little more.
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>>8017267
Can you be more specific about the trouble you're having?
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>>8017267
>How do you git gud at E&M?
Take vector and complex analysis course first and it becomes easy.
if natural selection theory is correct, then why does species die by age?, i mean, there isn't ANY advantage for an species to be mortal; more years to live mean more oportunities to generate offspring and therefore, there is a much larger probability to survive in the future. a species that doesn't die because of age would dominate the world undoubtedly
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Evolutionary advantages go as far as your chemical setup lets you. Sure natural instincts would dictate you to live longer but thats physically not possible
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>>8017113
We've already fucked a lot by the time the things that makes us die kill us. It isn't selected against.
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>>8017127
i've learning that death by aging is somehow programed in our DNA.
Anonymous
When will this happen /sci/? 2016-04-20 00:44:45 Post No.8017110
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When will this happen /sci/? 2016-04-20 00:44:45 Post No.8017110
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When will this happen /sci/?
Anonymous
2016-04-20 00:44:45
Post No. 8017110
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>When do you think we will be merged with technology AKA The Singularity?
>What role do you think science will play in this merger?
>By what year do you think that Transhumanism will be fully acceptable by society?
>What tech giant(s) do you think will be a the forefront of this movement?
>What's your view on The Singularity?
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tomorrow
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>>8017110
2030
A Major role because there will be huge funding for this movement
2065
IBM and Apple
I think it will complete remove human limits and open a pandora box of what it means to be human.
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>>8017118
>IBM and Apple
Why do you think they will?
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Why does the USA recommend only about 60mg-100mg of Vitamin C per day, yet many scientists, foundations, and organizations recommend at least 1000mg per day?
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>>8016944
>Why does the USA recommend
That's a tough call. Usually I don't think of nations as being capable of recommending things beyond the expertise of the people that recommended it in the first place. Did nations attain particular agency at some point or are you just not sure where the recommendation actually originates?
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>>8016949
like this
http://www.mayoclinic.org/drugs-supplements/vitamin-c/dosing/hrb-20060322
>The recommended daily intake by the U.S. Food and Nutrition Board of the Institute of Medicine for men more than 18 years old is 90 milligrams of vitamin C daily
>The upper limit of intake (UL) should avoid exceeding 2,000 milligrams daily in men or women more than 18 years old
That article goes into what this thread is about. I see people who take like 6 gram per day for skin and hair lightening effects from vitamin C.
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>>8016958
>the U.S. Food and Nutrition Board
Thanks. Hopefully OP will read that link some time.
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If a photon doesn’t experience time, then how can it travel?
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>>8016903
Didn't realize time was standstill.
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>>8016905
From the point of view of a photon, it pretty much is.
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>>8016903
From its own point of view it doesnt, it only moves from our point of view
Is there any single function that fits the parameters of f(x) = -(x^2) for intervals [-infinity,0] and f(x) = x^2 from [0,infinity]? Pic is my autistic rendition.
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g(x) = x^2 from [0,infinity] for less ambiguity, my bad. Question still stands.
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>>8016856
Actually, x*|x|
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A piecewise function is still a single function, dipshit
If I am allergic to sulfur and Cocnut Water contains sulfur dioxide, is it safe for me to drink coconut water?
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How the fuck are you allergic Sulfur?
Im pretty sure youve eaten eggs before.
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>>8016739
you're not allergic to sulfur
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>>8016739
If you were allergic to sulfure, you would be pretty fucking dead by now.
Why are humans the only species on the planet capable of commiting suicide?
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>>8016711
Because it requries a high IQ to become nihilistic and apathetic.
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>>8016711
define suicide
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>>8016711
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My uni offers me the chance to create my own major. I am just curious as to what major you guys would create for yourselves. I'm pretty happy with my geology major. I wouldn't change it.
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A major that revolves around the simulation of systems. Basically comp physics and basics, comp chemistry and basics, comp ect, a bit of CS
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Mathematical Physics. I have zero interest in working in a lab.
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Out of curiosity, how does this work? Can you name it yourself and literally "create your own major", to the point where you can have whatever classes you want?
Anonymous
Amplifying the power output of a WiFi signal 2016-04-19 20:33:35 Post No.8016615
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Amplifying the power output of a WiFi signal 2016-04-19 20:33:35 Post No.8016615
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Amplifying the power output of a WiFi signal
Anonymous
2016-04-19 20:33:35
Post No. 8016615
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Ok so this might be a stupid question and I'm well aware of the fact that I'm pretty clueless at this, but I figure I'll ask anyways.
So from wikipedia it says that WiFi signals are limited to transmit up to 100 mW of power. How accurate that number may be is not what's important; what I'm interested in knowing is whether or not that number is a limitation by rule, or if it's a physical limitation. More specifically, can you somehow modify a WiFi signal to transmit more power (and I mean power in the physics sense as energy per second)? If so, what are the limitations? Could you possibly use a wifi signal to transmit, say, hundreds of watts of power?
btw I'm posting this on /sci/ because I feel like it might be a problem related to the physics of electromagnetism, waves etc. I don't really know I'm not a scientist pls no bully
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it is certainly possible to up it by many mWs
here's a demonstration of how to go about it: https://www.youtube.com/watch?v=LY8Wi7XRXCA
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>>8016615
It's a limitation by law. The point is to limit signals interfering with each other.
But sure, physically, there is no real limit. A WiFi signal is just radio waves, i.e. light. You can have dim lights or very bright lights. As it happens only a very dim light is needed to communicate at typical WiFi ranges.
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>>8016621
>>8016630
All right cool, now here's another question I've been thinking about.
Would it be possible to amplify a wifi signal, not from the transmission source, but rather at the receiving end? As in say I receive a 100 mW wifi signal, could I use some device to pick that signal up and rev it up on my end? Sorta like a transformer would increase the voltage of an incoming electrical current? Again I apologize if these are simple questions, I really have no clue about this but google didn't really help me out
>When a tree falls in the woods with no one there to hear it, does it make a sound?
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>>8016552
>If I bang ur gf when ur not around, is it still cheating?
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>If you kill a cat in a box, but no one there to observe it, is it dead ?
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>>8016552
>If no one believes in the value of fiat money, does it really exist?