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Archived threads in /sci/ - Science & Math - 1905. page

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Are there multiple universes?
62 posts and 6 images submitted.
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That girl's not attractive.
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>>7834329
there is the world where she is.
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>>7834334

Someone living in a different universe would not be that girl.

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>2016
>esophagus and airway aren't fully separated yet
>it is still possible for humans to choke on food
Why did evolution fuck up so badly?
45 posts and 5 images submitted.
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>>7833849
Someone could kill you by holding your nose
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>>7833944
And breathing through your mouth is essential for any kind of physical effort.

Running to hunt your prey or escaping from a predator is millions times more beneficial than not choking on food even if you're a retard who can't eat properly.
>>
>>7833963
Yes because you cluld totally outrun
>a bear
>a lion
>a wolf
>a shark
>a gator
>a python

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The old one is over the bump limit


Mine: What's the easiest way to learn the LaTeX markup subset used on /sci/?
311 posts and 40 images submitted.
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Is this book a good starting point for someone studying proofs for the first time?
Can you guys recommend some other intro to proofs books?
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>>7833056
This is my favorite intro to proof book.

It's very short, very well-written, and covers some useful (and interesting, in my opinion) things as well rather than the contrived examples many how-to-prove-it books are filled with.
It's also cheap, which is nice.

Keep in mind that there's very little to actually _learn_ about doing proofs. Only a few pages.
The important part is to do a fuckton of them to get experience with writing and reading proof.
>>
How can I calculate the volume traced by a circle in R^3 that rotates x radians while translating a distance d along a line? (center of circle stays on the line)
At the start the circle is oriented along the xy plane and it's translated along a line in the xy plane while rotating "forwards". For example if r=1, x=2pi and d=0 it's obviously a unit sphere.
How to plot the resulting shape?

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Do grills that are good at math or physics physically attract you?
190 posts and 35 images submitted.
>>
It's usually the tits.
>>
>>7830550

As if that snorlax looking female would attract me.
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>>7830550
If they were good at physics they would figure out ways to physically attract whatever they want.

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How many watermelons are here?
112 posts and 13 images submitted.
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0, that's just a photograph of watermelons, not actual watermelons.
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>>7827653
There are four 3/4 of watermelons and four 1/2 watermelons.
>>
>>7827653
5

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You don't pick your parents, you don't pick your genes, you don't pick the environment in which those genes were expressed, you don't assemble the micro and macro structures of your brain which decide every conscious and unconscious action you will make in your 2.5 billion seconds of life, you don't choose the thoughts in which you think.

What makes you think you have any free will whatsoever.

>inb4 "hur dur I have the free will to raise my right hand"
320 posts and 27 images submitted.
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>>7825360
I want to call you a faggot now and so I will.

Faggot.

Check mate.
>>
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>>7825376
>>
>>7825360
it's not like we are trapped in our bodies, we are our bodies, so the result of our thought processes is our free will. It's not free from the laws of nature, but then nothing is, so it's pointless to expect somethign else.

You expect some kind of divine/transcendent qualities for free will, but that isn't a necessity at all.

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the way of the future
207 posts and 26 images submitted.
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>>7824430
Does anyone have the paper? Still can't believe the cat sees us as big cats
>>
>>7824438
It is from 1999, I coud not find a digital version.
But it is a legit Berkley experiment.
>>
>>7824440
Did they comment on that big cats thing? Is it an accepted fact that I wasn't aware of?

why do amerifats call maths or mathematics math?
53 posts and 5 images submitted.
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>>7816534
It is a singular subject. Do you call biology "biologies"?
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>>7816556
I never took mathematic.
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>>7816556
do you call sports sport?

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My group is having a lot of trouble coming up with a senior project idea for Mechanical Engineering. Looking for some suggestions. Any help is greatly appreciated.
88 posts and 3 images submitted.
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>>7818197

A mechanical female sex toy that thrusts through the cervix
>>
Make an adjustable dildo that can change length and girth
>>
>>7818197
>group
>GROUP

Seriously? Is this level of hand holding actually real for engineering courses?

Both my math graduation projects are individual. I guess only some majors can be trusted as adults with responsibility, work ethic and intelligence.

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What went wrong in science that this doesnt exist yet?
71 posts and 12 images submitted.
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>>7817738
Physics turned out to be a real thing.
>>
[psychosis intensifies]
>>
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>>7817741
>Physics turned out to be a real thing.
implying electromagnetic fields dont exist
implying generating a stasis field doesnt create a reverse vacuum over solid ground.

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A train originally has no passengers on it.

The train stops at villages [math]v_1, v_2, v_3, \ldots [/math] respectively.

At each village, 2 people board the train and 1 person gets off.

After visiting all the villages [math]v_i[/math], the train gets to village [math]v_\omega[/math]. How many people are on the train at that point?

______________
Side-note: If you don't believe the train ever gets to village [math]v_\omega[/math], think of village [math]v_i[/math] as being at location [math]\frac{2^n-1}{2^n}[/math] on the real number line, and village [math]v_\omega[/math] as being at location 1 on the real number line. Imagine the train moving at constant speed across the interval [0,1], with people hopping on and off the train arbitrarily quickly at each village. Clearly the train reaches village [math]v_\omega[/math] in finite time.
88 posts and 3 images submitted.
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There are two types on infinity - countable and uncountable. Your thought experiment relates to the countable type.

Watch from the 2 minute mark; or watch it all, its an interesting video.
https://www.youtube.com/watch?v=s86-Z-CbaHA
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>>7815579
So what's the answer then?
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>>7815585

The answer is that you don't understand infinity well enough to ask a coherent question.

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Why the fuck is there so much "prestige" associated with Med students?
>I study Physics in a top 10 university
>"Meh"
Vs
"I'm a Med student in "what the fuck?" University
>Wow you're going to be a doctor?
I know M.D. Programmes are not easy but come on.
76 posts and 3 images submitted.
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>>7811028
Nobody has any kind of understanding of what a doctor of physics does. And a lot of them who do simply do not see it as important as what doctors do. On the other hand, everyone has seen a doctor. Everyone has seen how one of them 'saved' their lives or maybe someone else they know.

However, there is an underlying question here.

WHY DO YOUR CARE?
H
Y

D
O

Y
O
U

C
A
R
E
?
>>
>>7811028
Best post in a while
>>
>>7811033
Holy fuck. An insightful answer on sci to a post like this?

Are you ok anon?

So due to the theory of special relativity, the speed of light in vacuum, c ~= 3x10^8 m/s is the fastest speed possible, but emitted photons do not accelerate up to that speed right? It's just an instantaneous electromagnetic wave. I know that photons can be affected by gravity which gives them acceleration ( change direction of velocity), but I'm talking about when an excited electron returns to its ground state by emitting a photon, the photon just appears i to existence already going at the speed of light. Is this correct?

What is the difference between the cyclo/synchrotron and particle accelerators like the LHC?

What is the highest %age of c that humans have been able to accelerate a massive particle to?

Is there a limit to acceleration in the universe like the limit of c for speed? Is it possible to accelerate a particle at 3x10^9 m/s^2 for 0.09 s to get it to 0.9c?Or even at arbitrarily larger accelerations than that for even smaller time intervals?

What would be the limit to acceleration? The magnitude of the force and so the energy needed to create that force?
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Too many questions.

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Realistically, how would you solve the overpopulation issue? Mass killings, forced migration?
Personally the idea of chemicals in the tap water reducing sperm count appeals to me
142 posts and 13 images submitted.
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>>7806854
>knock on door
>Good morning sir. By any chance, is your degree in pure mathematics?
>No, I studied eng...
>shoots him in the face
>Next house.
>Repeat.
>>
>>7806854
Keked
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>>7806854
Nazi cartoon fantasies will get you nowhere.
Improve women's rights and education.
The main problem is overconsumption btw.

http://youtu.be/ezVk1ahRF78?t=10m

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So we have yet to come in to contact with aliens. I do believe they exist.( virtually impossible for them not to) but what if they don't exist... Yet. There has to be a first everything. What if it is us?
134 posts and 21 images submitted.
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>>7812048
What if we're the aliens? Why don't you go fuck yourself.
>>
>>7812052
Well we are technically aliens to life forms not from earth.
>>
>>7812052
He's saying what if we are the first intelligent life to form and there's have yet to form.

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