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Archived threads in /sci/ - Science & Math - 77. page
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File: Tsuka.jpg (33 KB, 1024x768) Image search: [Google]
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could you cut someone in half with a one atom thick sword?
44 replies and 4 images submitted. Click here to view.
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idk maybe
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don't worry, you'll never get a girlfriend anyways
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>>8139191
It would snap

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How comes a spinning electron creates a magnetic field?
20 replies and 2 images submitted. Click here to view.
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>>8139069
gravity pairs as a solution to the field equations as a product of torque
>>
because Magneto said so
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>>8139069
Why shouldn't it create a magnetic field?

File: Grey Kangaroo group (1 of 1).jpg (330 KB, 1600x781) Image search: [Google]
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To those who have never seen them in the wild, Kangaroos have excellent camoflauge. The colour of their coat, in addition to their behavioual adaptaion of remianing silent and still helps them look almost indistinguishable from trees and/or tree stumps.

With the acknowledgment that Australia has no large native predators. (Beleive it or not)

What selective pressures forced the kangaroo to have such good camouflage abilities?
(The dingo has been proved to be an introduced species from just over 1000 years ago.)
11 replies and 2 images submitted. Click here to view.
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>>8139066
>Australia has no large native predators
>anymore.
>>
>>8139080
this

there were plenty of large and scary mammals and reptiles

lots were herbivorous, but animals like the thylacine were once widespread over the mainland.
>>
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>>8139104

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WTF am i doing wrong
20 replies and 4 images submitted. Click here to view.
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derivative of sqrt(x) is -1/2*(x^-3/2)
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>>8138947
sorry, i see what you're trying to do.

you simplified the equation wrong.
>>
thank-you very kind sir

File: Human-brain-and-spinal-nerves.jpg (74 KB, 500x493) Image search: [Google]
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What will the future of medicine/hospitals look like?

Also, are we likely to find a plausible cure for cancer in the near future?
33 replies and 2 images submitted. Click here to view.
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>>8138907
If we don't blast ourselves to the Stone Age, I think we could find a cure.
>>
What if there is a cure to be made, would the government just hide it or what?
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>>8138912
>If we don't blast ourselves to the Stone Age
>There are people who legit think nuclear weapons will be used in the age of mutually assured destruction

File: disgust.jpg (46 KB, 620x400) Image search: [Google]
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What is the evolutionary purpose of moral disgust?

I can understand that disgust over feces or rotten food was useful for survival, but why do we feel a much stronger disgust over amoral behavior, e.g. a promiscuous slut?
36 replies and 8 images submitted. Click here to view.
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What is the evolutionary purpose of asking the evolutionary purpose of thigns ?
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>>8138898
rules out impassionate people over compassionate ones.
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>>8138898
Preparing the human body for avoidance behavior.

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Do you think the Millennium Learning Goals are feasible to complete?
11 replies and 1 images submitted. Click here to view.
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>>8138882
Weren't the Millennium Developing Goals aimed to be accomplished by 2015?
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>>8138882
>Freeman Dyson
Everything is possible if we just tax the rich more and use that money to fund literally anything.

As much as I hate SJW, if the SJWs become a majority then that majority will have less approval of absurdly rich people and at that point passing legislation that tax rich people literally 100% will be just too easy. Then from those billions of dollars we can solve every single problem forever.
>>
>>8139291
In the off chance that this isn't bait, what happens when the rich people take their business elsewhere because we tax them too much?

There will always be a country willing to take them for cheap. You would simply end up with a society on welfare, because why work when you take home almost the same amount by doing nothing?

File: current output.png (11 KB, 626x370) Image search: [Google]
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I have recently been working on an experiment intended to optimize the efficiency of a car battery by determining the optimal concentration of (sulfuric) battery. I have calculated it to be 6 molar, which is what most brands use, however my results show something completely different. Pic related.

I have looked around on the internet to see if there are any papers on the effects of electrolyte concentration on the generation of current, but i have failed to find anything.

Any chemistry majors around here that could tell me what the relationship should theoretically...
Comment too long. Click here to view the full text.
15 replies and 1 images submitted. Click here to view.
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>>8138853

lithium is the way to go tbqh famiglia
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>>8138853
my guess is that your experiments are not replicating the conditions used in your calculations, or in real life.
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>>8138855
Lithium does not provide high enough currents, voltages, and is also too expensive for industrial use

>>8138856
Nope, but that should not make a difference in the slightest. The reaction should still occur at the same ratios. To give you an idea of what you are suggesting:
>use lawn-mower engine instead of car-engine to find fuel efficiencies of different oils
>find that cooking oil is 99.999% efficient
Comment too long. Click here to view the full text.

File: o-RICHARD-DAWKINS-RACIST-facebook.jpg (232 KB, 1536x1024) Image search: [Google]
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Legitimate question here. Why does modern medicine bother with developing cures for diseases or keeping terminally ill patients and people with incurable diseases like Down's Syndrome alive with extremely expensive technology? From an evolutionary perspective, it does not make sense. First, disease has been a way to naturally select the fittest and thanks to that we've been able to come this far. Second, what is the point of preserving genes that have proven to be useless for humanity?

tl;dr Modern medicine does not make sense because it contradicts natural selection.
31 replies and 2 images submitted. Click here to view.
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>>8138812
Because the reason medicine became an industry was to promise longer life spans for some money.

If a company that makes hospital equipment or medicine simply stopped providing the things needed for people with Down's Syndrome then anyone could get a couple of investors in and start a company that does just that and that guy would make millions of dollars instantly.

>From an evolutionary perspective, it does not make sense.

You are really tipping that fedora hard.

Anyways,...
Comment too long. Click here to view the full text.
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Because empathy does makes sense from an evolutionary perspective
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>>8138812
From an evolutionary perspective, it makes sense because evolution helped develop the human brain, which includes making decisions to save other people as a favourable addition to our utility.

>>8138833
>This is why I do not take non-math majors here seriously. I treat you lot like toddlers.
The irony here is that a lot of math majors here are cringey fedoras that lack basic knowledge in every other scientific field, including economics.

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How fucked is our environment?
14 replies and 2 images submitted. Click here to view.
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Fucked
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>>8138783
Pretty fucked, but there's nothing we could really do about it right now that doesn't involve halting industry.
The best solution is to continue advancing under the promise of environmental destruction until a feasible solution is found in the next coming years to decades.
Even if the environment does get smashed, it's not like humanity itself wouldn't have any time to prepare. Developed countries would adapt while underdeveloped nations get ravaged.
>>
It is completely and totally fucked

What's a good further text on Organic Laboratory technique having completed Zubrick's Survival Guide?
24 replies and 3 images submitted. Click here to view.
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>>8138719
>beyond Zubrick
I'll assume you're a motivated undergrad:
at this point you don't need a textbook, you need 1 on 1 instruction. You need to be paired up with a grad student or post-doc.
>>
>>8138719
>>8138723
if such an opportunity is not available to you, you may well benefit from this undergrad level inorganic lab text
http://www.uscibooks.com/rauch.htm
(go to bookzz or libgen or whatever to get it for free)

Schlenk is Schlenk - at lot of techniques carry over.
>>
>>8138723
> I'll assume you're a motivated undergrad:
Aye.

> at this point you don't need a textbook, you need 1 on 1 instruction. You need to be paired up with a grad student or post-doc.

A textbook to get pointers over the summer would be quite cool, all the same. Our undergraduate student doesn't have pairing, except for one poorly paid grad student to 10 undergrads, where they try to instruct us en masse in short 3 hour labs....
Comment too long. Click here to view the full text.

File: climatemapusa2yv3.png (54 KB, 701x565) Image search: [Google]
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Where in the U.S. does grass not grow faster during the summer months?

Fuck cutting the grass every 1.5 weeks in 90+ degrees.
24 replies and 5 images submitted. Click here to view.
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>>8138680
if you cut the grass less often, you cut the grass less often.
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>>8138680

buy GMO winter grass
>>
You're seriously going to move somewhere else because you have to cut your fucking grass every couple weeks? Jesus, you're an entitled twat.

File: 1454529530589.jpg (280 KB, 1280x960) Image search: [Google]
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Tomorrow I'm gonna have the chance to ask Dava Newman (Deputy Administrator of NASA) some questions - I'm not sure about what though...

So what's the most interesting thing i can actually get some high-ranking official in a public setting to talk about? Ayy lmaos? SpaceX? Don't wanna waste the opportunity if theres actually something worthwhile to gain out of this...
11 replies and 2 images submitted. Click here to view.
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>>8138655
you're gonna have to give more context than "public setting".
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>>8138659
I dunno tho. Im meeting her with a class in an embassy, noone was really told more than to prepare some questions...
>>
>>8138659
well not an embassy but something like that...

File: Speed-of-light[1].jpg (108 KB, 640x360) Image search: [Google]
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If time stands still at the speed of light, why does light take time to travel from point A to point B?
12 replies and 3 images submitted. Click here to view.
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general relativity doesn't affect photons
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>>8138592
Are you in the same reference frame as the photon?
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>>8138592
Protip: It doesn't.

Now even bishops make fun the the guy bill nye

https://www.youtube.com/watch?v=SH_Njsa0zVQ
23 replies and 1 images submitted. Click here to view.
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>>8138542
Meh
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>>8138542
Fucking care. The only reason hes still doing that shit is because otherwise PBS would have his balls in a shrivel, mate.
>>
>>8138565
He could do actual work

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