Archived threads in /sci/ - Science & Math - 4. page
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What's the difference between vacuum energy and dark energy?
Is it that vacuum energy is equivalent to zero point energy as measured by the Casimir effect, Lamb shift and spontaneous decay?
And that dark energy is a hypothesised form of energy made up of zero point energy and scalar fields, such as the Higgs field, that permeates all of space and which would therefore explain the accelerating expansion of the universe?
So one is an experimentally verified phenomenon, while the other is an unverified hypothesis that intends to explain an observed phenomenon?
>>8205578
The difference is that dark energy is 10^115 times as powerful as the expected effect of vacuum energy.
>>8205578
>What's the difference between vacuum energy and dark energy?
one is real, the other is not
>>8205582
Right ok, so the accelerating expansion of the universe would require that much energy.
So we're left with a massive amount of mystical invisible energy?
>>8205586
That sounds a lot like:
>So one is an experimentally verified phenomenon, while the other is an unverified hypothesis that intends to explain an observed phenomenon
So, ok cool.
Hey /sci/, businessman here,
What are some things that you guys wish you had along your college years or for your studies? I'm considering creating a business appealing to STEM students, as I always enjoyed science, and would like to help others who enjoy it.
>>8205493
Learn to download the image, not the thumbnail. FaggOP brainlet confirmed.
>>8205496
this is true
>>8205493
>What are some things that you guys wish you had along your college years or for your studies?
nothing
of course I speak only for myself and not every other STEMfag
but if I was a businessman and would cater to STEMfags I would offer cheap beer, coffee and energy drinks because almost everyone here seems to chug that shit all day long
too bad for you though. we have our own brewery and get 1 free coffee and 1 free beer a day. I never used it though because I never...
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Is it possible to simulate the effects of ferrofluid on a desktop computer? Can I use RealFlow for this or are there better tools available?
>>8205388
yes.
>>8205388
Yes
no.
Is this book the best book for beginner higher level mathematics?
>>8205282
It's the best book for an adult wanting to (re?)learn school math
not OP, but i saw the thread where this book was recommended.
What subject covers pic related? And what path from high school maths will have me understand this notation and statments?
>>8205370
Bump for interest.
14 days till exam
30 pages have to be 100% present
It takes 5min to learn the content of one page
How many hours do you need per day?
time_needed=time_learn*pages/days
time_needed=5min*30/14=11min
But you forget that stuff exponentially!
>pic related
If you would assume the repetitions were at
10min,1hour,1day,3days,7days
How would my formula than look? At day -14 you learn 2 pages and than 10min later again those same pages.
At day -13 you learn 2 new pages, repeat them and the 2 pages from the day...
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>>8205255
Bump for potential
Hey mathfags you are needed here
Anki?
Let's have a thread about simple math problems.
I am pretty bad at math and have barely more than high school education. But recently I sat at the toilet and wondered, what is 1+4+9+...+x^2? Then I took a piece of paper and solved it, googled and discovered that my formula is correct. It was quite fun doing it. Some of you may laugh at the simplicity, but as I said, I am pretty bad at math.
Anyway, got more simple math problems for me? It's kinda fun.
If you want simple math problems like that, especially ones at your level of education, consider conics.
Maybe we can get some more simple math problems if we just extend your problem!
like, if "t" is some number, what is
[math] 1^t + 2^t + 3^t + ... + x^t [/math]
?
Or we may take t to be a negative number. For example, let's flip the sign in your example. What number is
[math] 1^{-2} + 2^{-2} + 3^{-2} + ... + x^{-2} [/math]
In this case, we can even let x be arbitrary high, we can even sum all numbers!
What is
[math] 1^{-2} + 2^{-2} + 3^{-2} + ... [/math]
Or what is
[math] 1^{-s} + 2^{-s} + 3^{-s} + ... [/math]
for any...
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>>8205240
The Roymang Seto Fangtion.
Let’s Get This Straight, Once and For All
From a /sci point of view
What is the better Adblocker?
with highly scientific poll
http://www.strawpoll.me/10752753
>>>/g/ays are over there
>>8205183
adblock in $CURRENT_YEAR lel
>>8205183
Firefox and NoScript.
As the title says what can I do to become more rational but also creative?The only things that I think may help me are philosophy(not baiting) and math.
Start working into organic chemistry and molecular synthesis.
>>8204751
Care to elaborate or youre just making fun of them?
>>8204751
Kek.
OP, I'm not sure how to help you. For me it is curiosity that drives me to be both rational and creative. I am constantly refining and expanding my worldview, and given that I can't often have conversations about it with my friends, I am driven to express it in writing, painting, drawing, music, and eventually maths.
I suppose the best thing I can recommend is to read a lot of textbooks, philosophy, and literature.
Once you've read a fair bit, I'd recommend a trip on LSD or 1p-LSD...
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Why do physicists claim the big bang ball was the size of a marble? How did they calculate that?
It could have been the size of a boulder, a star or a fucking galaxy.
Why do mathematicians claim 1+1 is 2? How did they calculate that?
It could be 3, 4 or fucking 2145921.
who claims it was the size of a marble?
as I understand it, the big bang wasn't a sudden expansion of matter in space, it was an expension of space itself, so the universe was always the same "size", because you can't measure something outside of space.
Am I wrong?
>>8204716
but how do they know if it started as a marble, a grain of salt, an atom, smaller or even bigger
How many hours would one need to complete a math bachelor?
>>8204443
about 3000 with all the homework.
>>8204448
Why?
>>8204451
~120 credit hours * 16 week semester. round up to the nearest thousand for homework and projects. shit nigga, maybe you should forget about this math thing.
How did they walk? Is the knuckle-walking seen in chimps and gorillas unique to their respective genera, or was our common ancestor a knuckle-walker?
>>8204057
>knuckle-walker
I now know what to call those fucks on my team in multiplayer games
Not sure if this is the right word, but is there a proper word describing an operation on a set that never gives back an element from the set?
i.e. you have some magma (N, *)
for any x, y in P
x * y is not in P (but is in N)
(not necessarily a binary operation)
e.g.
the primes under multiplication
characters under concatenation
forgot to say
*P is a subset of N
>>8204022
I don't think there is a word for it. Anti-closure sounds good.
As a side effect, if the operation has an identity then said identity cannot be contained in P in order for it to have this property.
>>8204022
>Asking an algebra question to /sci/
Most people here don't even know Calculus II.
why do women have orgasm?
I mean men need to shot their sperm into women whats the nautral advantages of women orgasm? Women rarly get orgasm during normal sex so its not for reproduction
>>8203936
Because God wants all his children to experience both pleasure and pain, an orgasm being the epitome of pleasure for a woman.
I assume you mean aside from general pleasure from sex, which
Women generally are more likely to orgasm with a partner that they know and trust, so it could be to facilitate pair bonding in order to help raise children.
Sex is about a lot more than fertilization, it is the strongest form of bonding.
Also, male orgams and ejaculation are not the same thing.
redpill me on water fluoridation.
does it actually help your teeth?
is it toxic?
does it do anything at all?
if it doesnt help your teeth, then why is it in the public water supply?
>>8203863
>redpill
>>8203899
Reddit or summerfag?
>>8203863
>does it actually help your teeth?
No. Fluoride strengthening teeth is a meme, and it could not work at all given how long water stays in your mouth.
>is it toxic?
Yes. Fluorosis is real and not genetic.
>if it doesnt help your teeth, then why is it in the public water supply?
Ask your grandfather who worked in the concentration camps. :^)
I about to apply for an engineering education but my old man refuses to tell me what industries allow engineers to prosper nor does he want tell me what kind of engineers are needed. He keeps muttering about "somethingsomethingthe type of engineer that can convince others that he is needed". I asked grandpa but all he keeps saying is "the semi conductor industry is dead".
I just want to provide for my family and allow dad to go back to being a scientist, help me make money /sci/
how will this allow your dad to be a scientist?
what does that have to do with your education? pick what you like.
>>8203781
He switched to the private sector when he married to provide for the family. Im just trying to figure out what industry there is space left for me. Software and Energy seem to be as big as ever, car industry doesn't seem to be doing to good and I only have the vaguest clue on what it entails to be an 'electrical enginner'.
>>8203777
>he keeps saying is "the semi conductor industry is dead".
In spite of much noise in the Valley this is just wrong.
Good engineers in fab, analogue design etc are still needed.
