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Archived threads in /sci/ - Science & Math - 467. page


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Will this thing EVER break down?

I mean, it's been like truckin' for like 13 years.
57 posts and 14 images submitted.
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>The Mars Exploration Rovers carry two 8-amp-hour lithium batteries.
I wish I had a 8000MAh lithium battery that would last this long. Can't seem to go for more than 3 years before mine puff up with gases and become a fire hazard.

Though I suppose you don't really need to worry about a fire in an atmosphere that is nearly vacuum and primarily composed of fire retardant.
>>
>>7786764
I hope not, it's cool as hell.
>>
>>7786764
Eventually and without maintenance, it will break down. I mean I'm pretty shocked it's still going.

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What's your favorite branch of math?
85 posts and 18 images submitted.
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>>7784433
Complex Geometry
>>
Algebra
>>
>>7784433
set theory, it's also the most useful desu

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How many energy points did you earn this week ?

What are you working on ?

Mission progress ?

pic related is what I'm doing. brainlets only, no high iq shitposters needed. some of us are 25+ iqlets brainwashed by pop math into wanting to underachieve intellectually so don't spoil these threads for us
61 posts and 9 images submitted.
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>dat distributive property
>dat rigorous reasoning to obtain a value for y

makes my peepee firm, /sci/
>>
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feels so good to get those correct answers

thanks uncle Sal
>>
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dem energy points, feels so good

>mirin avatar, /sci/ ?

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/g/ here, can you please tell your man to stick to the cosmos?
65 posts and 5 images submitted.
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>>7783453
Why do even have BSG in your feed? Unfollow whoever retweeted it to you.

No one here respects pop-scientists.
>>
>>7783453
>create unhackable systems

I respect the man but this shows complete ignorance of the subject.

It is literally impossible to create unhackable systems.
>>
>>7783462
He's good for the kids and pseudo-intellectuals.

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How much confidence do you have in modern society to overcome the increasingly daunting problems of achieving sustainability with the Earth?
55 posts and 8 images submitted.
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I have every confidence in the future of humanity. The reasons are best explained in this manifesto, which I highly recommend you read.

http://www.ecomodernism.org/

Key reasons;
- increasing development leads to less environmental dependence, and therefore impact, per capita
- the world has reached 'peak child', where global fertility rate is a stable ~2.6 children per woman. Result; better education and opportunities for children resulting in rapid development.
- projected global population at end of century is easily fed by farming current farmland more efficiently (inefficiency in developing world is staggering due to poor access to modern agricultural technology)
>>
Earth is kill my friend. Focus on terraforming Mars.
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>>7782920
Well people have been predicting malthusian collapse for a little over 200 years, it's still not happened. So I'm pretty confident.

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What made you major in maths? What are you guys going to do in the future?
85 posts and 2 images submitted.
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>>7782611
Because it's challenging and fills me with joy. Research in pure math obviously.
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>>7782613
Would your fun and strive for challenging work stall; if you majored in physics or other sciences?
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>>7782619
Not him but I started disliking the sciences back in high school. I was always good at them but the lack of precision and the limitations of nature made me feel powerless doing it and thus it wasn't very enjoyable.
Math on the other hand let's me explore my ideas in more depth without running into stupid issues such as: is this possible?
I'd like to do research or some comfy software dev

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http://www.rampant-antismoking.com
http://www.spiked-online.com/newsite/article/5988#.VpQO7oo77CQ
http://www.spiked-online.com/newsite/article/7451#.VpQPDYo77CQ

Is smoking being ridiculously bad for you just popscience? /sci/ is supposed to be for smart people but they insist that secondhand smoke is bad when it clearly isn't, especially when smoking in itself is incorrectly linked with many health problems caused by other factors.

Why do people, especially supposedly smart people, buy into this? Most smokers can suffer a small number of health problems and still live until they're in their 70s or even 90s. In contrast you've got people with other vices dying way sooner, like overweight people.
98 posts and 11 images submitted.
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>time cube style website
>news articles
>anecdotes

Post actual science or GTFO pop sci retard
>>
>>7781565
what an absolute camel shagging wife beating gypsy peasant you are

shut the fuck up and stuff that ciggy up your arsehole
>>
>>7781565
what the fuck is wrong with you idiots coming into /sci/ daily with this "smoking isn't bad" shit? fuck off and die from cancer already

1 - 0.9999... = 0.000...1
0.9999... =/= 1
prove me wrong

protip:you cant
157 posts and 20 images submitted.
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This is bait.
>>
>>7781261
it doesnt matter how many times u roll a 10 faced dice, there is one case such as 77777.... you cant deny its existence.
That is, y = (10^x - 1)/10^x, if y can be 1, then 10^x = 10^x - 1, then 1 = 0.

0.999... is just not 1, give it up
>>
>>7781275
The probability of it being 777777... is 0. Note that probability 0 [math]\neq[/math] impossible.

Sage because bait.

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Hey /sci/,

Name a single good textbook published by Pearson, I fucking dare you to try.

Hint: There are none
89 posts and 14 images submitted.
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>>7779877

Algebra by Artin
Linear Algebra by Friedberg, Insel, and Spence
Applied Partial Differential Equations by Haberman
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>>7779877
Pretty sure they have published Spacetime and Geometry by Carroll.
>>
Really any Giancoli physics text is pretty good, despite the shekel grubbing at Pearson

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I might as well give it a go.

Post whatever you are working on, share the best books for beginners and people that is interested in learning or taking engineering.

>What are you studying/did you study?
>What projects are you working on?
>Did you go to college or are you autodidact?
>Which books are the best for your area?

If it goes well we might have a wiki or a pastebin.
115 posts and 8 images submitted.
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>>7777475
CS. Machine Learning Specialization.

Graduate Student. Working on Hyperloop design.
College and Autodidact on EE curriculum.

Bishop - Pattern Recognition and Machine Learning.
>>
>>7777475
>If it goes well we might have a wiki

We already do

http://4chan-science.wikia.com/wiki/Mechanical_and_Aerospace_Engineering
http://4chan-science.wikia.com/wiki/Electrical_and_Electronics_Engineering
http://4chan-science.wikia.com/wiki/Computer_Science_and_Engineering
http://4chan-science.wikia.com/wiki/Chemical_Engineering
>>
>>7777481
What are your references for studying EE?

>>7777485
Thanks.

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ITT: post ways the human body is flawed
>be dehydrated
>hurr I'll make you throw up more!

>be dehydrated
>hurr I'll make you shit water!

>
208 posts and 13 images submitted.
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> breathe oxygen
> contributes to cell aging and death
>>
Eating and breathing through the same hole is utterly retarded.

Thanks God.
>>
>>7774450
But oxygen is the most potent electron receiver, and it is also abundant in the athmosphere. Without using it for energy, complex multicellular life could never have evolved!

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Have sites like khanacademy, veritasium, minutephysics, vsauce and movies like The Martian etc oversaturated all the STEM fields with hurr durr science wannabes who'll (lets be honest here) never work in a STEM field anyway?
52 posts and 3 images submitted.
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>>7785197
Khanacademy is just a resource for education, like a book. Retards could always pick up books so nothing is being changed.

The rest you list is simple entertainment. No one watches the martian and then thinks he wants to be a botanist. At least I hope so.
>>
>>7785197

Does it matter? They're going to get weeded out by their second year.
>>
>>7785197
>>7785201
Veritasium, MinutePhysics and Vsauce are good for a few things, getting the gist (in layman's terms), teaching children and entertainment. Anyone who is serious about learning a STEM related subject should then go on to do proper research, or enroll with an academic institution.

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>Physics class

>Ok today we are going to learn how to find delta-v, here is the formula
>Ok class today we are going to learn how to find average acceleration just use the delta-v formula and decide it by delta t and you have average acceleration

>Math Class
>Ok class today I am going to show you this super easy method I personally came up with, I call it FOIL. Here are a bunch of steps for you to memorize
>Ok class today we are going to learn how to factor Trinomials using guess and check, here are a bunch of steps for you to memorize


Why is math taught as "Here is a specific problem, memorize these steps and you can solve it" as opposed to "Here is a formula, memorize it and you can solve any problem"?
22 posts and 2 images submitted.
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>>7785578
Where you are maybe... But not everywhere
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>>7785578

Brainlet detected.
>>
>>7785578
>high school classes

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13 posts and 2 images submitted.
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>>7784699
Are you a popscifag or something?
>>
He looks like a nazi so fuck him. Why don't you appreciate Neil DeGrasse ?
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>>7784714
"Unhackable system"

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http://www.theguardian.com/lifeandstyle/2015/may/18/truth-about-poo-doing-it-wrong-giulia-enders-squatting

http://www.npr.org/sections/health-shots/2012/09/20/161501413/for-best-toilet-health-squat-or-sit

http://jezebel.com/youve-been-pooping-all-wrong-1636521806

So ever since late last year there's been this subculture of pooping spreading (no pun intended) called squattypotty. It apparently states that pooping in a natural position, such as a squat just like our ancestors did, provides health benefits. I couldn't find any real research to back this up and I assume its just mainstream Dr Oz meme garbage but can any biologists here help me out?

>inb4 biology isn't /sci/
11 posts and 4 images submitted.
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>>7784465
Mudslimes squat when they shit so SJWs claim it's better.

>appeal to ancestory
They also never brushed their teeth, bathed frequently, and definitely didn't wash their hands.
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>>7784465
>squattypotty

Jesus fucking Christ, fucking Americans. If they didn't eat so much garbage they wouldn't have defecation problems in the first place.

Satan couldn't have invented such a disgusting populace.
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>>7784486
>tfw american and underweight and over 180cm
>when i was a kid i always ate a lot of junk food
>kids around me told me id get fat in the future
>today those kids who ate "good" are all fat as fuck and i'm still thin as fuck

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