Sorry for a stupid question, just haven't dealt with maths in quite a while, would be grateful if someone could explain this school grade math equation to me. Pic related.
>>7795863
Did you ever learn how to do plane rotations?
>>7795870
yea.. which was quite some time ago..
>>7795863
Im thinking definite integral and playing around with sinhx and coshx maybe?
Im looking for this book titled 'Plastic Surgery Review' by shons and jensen
WB Saunders 1993.
Ive exhausted all my options and desperately need this text.
Any help would be deeply appreciated.
Out of curiosity, what do you need it for, OP?
>>7796053
Reading.
ok sci, pls redpill me over having sex without any protection.
how dangerous are STD?
how easy is to get a girl pregnant?
how dangerous is to fuck your female friends instead of whores and sluts (this implies you'll try to meet always new female friends instead of paying for sex)?
>>7795714
ahhh u still on the thread OP?
>how dangerous are STD?
you already have one
>how easy is to get a girl pregnant?
you already did
>how dangerous is to fuck your female friends instead of whores and sluts (this implies you'll try to meet always new female friends instead of paying for sex)?
you will have neither friends nor sex
lock your dick in a box and never let anyone ever see or touch it again. anime helps greatly
>redpill me
Kill yourself OP
hi, i wanted to ask /sci/ a question about linear algebra.
i'm new to this board, and i cheecekd out the /sci/ guide page (which was really good btw), but i couldn't find anything on linear algebra. my professor said that the book we will be using for linear is not very good, so i was hoping some of you anons could give me some linear algebra textbook suggestions.
i really appreciation any help given!
pic unrelated
>>7795561
>Axler
>Linear algebra done right
>>7795561
MIT ocw 18.06 my friend
Do everything that is asked.
You woke up in year 2000 B.C.
You have unlimited supply of pen and paper,and your work will be shipped across the globe.
History facts are off-limits.
Would you be useful to the world,or just first shitposter?
Definitely the shitposter. An opportunity like that cannot be missed. I'd fill that paper with so many memes that I'd be known as the master-memester to this day.
>>7795249
Considering that any knowledge that I could impart requires 3500 years of preparation, so simce I have a basic understanding of metal working I'd forge some iron and conquer the world, then I'd just try and bang as many Neolithic bitches as possible.
>>7795256
>Could avert the Judeo-Christian cuckolding of Europe
Do it anon. Do it.
The next evolution in human technology will be developed after an invasion by extraterrestrial beings
>>7794982
Think of the colonization of the new world by the eternal aglo except 100 times worse, total destruction of the species if the species is deemed intellectually inferior.
Okay. First off, I want to appologise for this ahead of time: English is not my first language.
Now I'm cross-posting this from /lit/ because I think this counts somewhat as a scientific problem, specifically in regards to the Species Problem:
So recently, I read Charles Darwin's On the Origin of Species. It got me thinking about evolution and how one species can change over time into another one. And I realized that gradients like that everything. AND THIS MAKES ME REALLY ANGRY! Why? Because now I find it hard to define anything. Take the image attached. I'm sure we can agree that on one side, it is blue, and on the other side, it is red. But at what point does red turn into blue? You can't mark off any specific line because at any line, the color directly on either side would be nearly identical. SO IF WE CANNOT DRAW A LINE, HOW DO WE DEFINE RED OR BLUE?
More relevant to the book, is the definition of human. You probably consider yourself to be human. You probably consider your parents to be human. And their parents. etc. But if we go back far enough, we get something that you wouldn't be willing to call human.
But let's say we do that in order. We keep going back a generation until we hit something that's not human. But we just called the child of this thing, human. And assumable, they'd be very similar things. So how can you justify calling the parent not human?
I DON'T UNDERSTAND GRADIENTS AND IT'S RUINED MY WORLD-VIEW BECAUSE I CANNOT GIVE ANYTHING CLEAR DEFINITIONS ANYMORE. HOW DO I DEFINE RED VS BLUE? HOW DO I DEFINE HUMAN VS NOT HUMAN? WHAT IS THE DIFFERENCE BETWEEN A TABLE AND A CHAIR?
>>7794873
Basically two things are a different species if they can no longer reproduce to produce viable offspring. So if we go back through time the point at which we can no long knock up a cousin on the Homo tree is the point at which they're two separate species.
>>7794877
boy you're just gonna love ring species then:
https://en.wikipedia.org/wiki/Ring_species
>>7794877
But dogs can have babies with coyotes? And lions can have babies with tigers?
And what about people who cannot have kids? Are they not human?
Is photography a science?
>>7794827
Maybe
>>7794827
fuck no
>>7794827
Hell yes
Could you survive such a blow to the head?
https://www.youtube.com/watch?v=pkfJkyHass8
I could.
>>7794283
Liam Neeson is a faggot
>>7794292
Why.
>Intensive phototherapy is provided at an irradiance of 30 mW/cm2 per nm or more (430–490 nm).
How do I read this? Do i have to multiply it for the wavelength? Is it
30 mW/cm^2
or
30 * 460 mW/cm^2 (13.8 W/cm^2)?
>>7793212
Please I can't wrap my head around this
>>7793212
Help me cure my jaundice
Please
[math]\frac{6}{12} = \frac{4}{8} = \frac{6-4}{12-8} = \frac{1}{2}[\math]
[math]\frac{6}{12} = \frac{4}{8} = \frac{6-4}{12-8} = \frac{1}{2}[/math]
[math]\frac{3}{6} = \frac{5.5}{11} = 2^{-1}[/math]
how to latex?
[math] \prod\limits_{n=1}^{\infty} n^{2n^{n}} [/math]
http://scitechdaily.com/astronomers-measure-the-temperature-of-the-universe-7-2-billion-years-ago/
Is it possible that how some believe the need for dark energy/dark matter is simply a result of us being wrong about the mass/temperature of the universe?
If we were wrong about the mass of the universe both dark matter and dark energy would change in quantity. Dark matter has a considerable amount of non-cosmological evidence behind it. So most likely it would stay in some new quantity (since dark matter is the largest component of the universe in mass). Dark energy's future would be more uncertain however. To be wrong about the mass of the universe tests of cosmology would have to be wrong, it is not simply assumed. If these tests were wrong then you couldn't trust the dark energy result until you rectified the problem.
The temperature of the universe (as in the CMB if that's what you mean) is measured not assumed. If that was wrong the CMB results (the most powerful test in cosmology) would be uncertain. If we were wrong about the temperature low mass dark matter like neutrinos could make a comeback.
We have 7 colors of the rainbow and 100 numbers, each color can be associated with a number between 0 to 100 or 1 to 100.
For example (BLUE, 48)
How many bits do we need to represent all possible combinations?
For 7 colors we need 2^3=8
But for the 100 numbers do we need 2^7=128 (which encompasses 100).
Do we need 128 + 8 bits?
Do we need 128 bits alone because 128-100-7=21 extra bits
Do we need less than that?
Thank you.
pic unrelated
Not sure I really understand your question but ill respond regardless
You kinda answered it yourself..
2^3 for 8 combos.. thats 3 bits
2^7 = 128, so 7 bits there
you could to 10 bits, first 3 for color, next 7 for numbers.
does this make sense, if not reword your question so I can understand it better.
you have 7 colours and 100 numbers
the number of possible combinations is 700
[math]2^9 < 700 < 2^{10}[/math]
you need 10 bits.
what the fuck is this for btw?
Why does the speed of light have a speed limit?
>tfw photons are a bunch of physical law abiding cu cks
>tfw literally communism for photons
TL;DR asking "why" is philosophy not science
"Why" is a pretty hard question OP. Far as I've seen in my education, we don't have a good explanation why our current model seems to be the way things are. Maybe things aren't actually this way and we're dumb. But we only know more or less how things work, not why they do.
>>7795643
Not Op. How does light have a speed limit? If photons have no mass and they travel freely in a vacuum, what is limiting how quickly light moves from one place to the next.
Inb4 google it, "science".
Can we discuss this or is it below a /sci/ence goy?
>>7795614
>Why does the speed of light have a speed limit?
tl;dr: if our universe is causal and local, we should expect a maximum speed at which events can cause other events.
Let's play God and imagine we're designing a new universe. The universe is some space, occupied by things, and stuff happens in it, to be very, very vague. What fundamental guiding principles should we use to build our new universe?
If you don't want everything to be totally chaotic, one guiding principle that you could have is causality: when two things A and B happen in our universe, they could either be unrelated, or related by causation: either A caused B or B caused A [1], and the laws of physics that you're going to design would tell you how this causation occurs.
Now, imagine two observers moving through your new universe, observing events A and B. Suppose observer 1 determines that A caused B: should observer 2 agree with this observation? You could say 'no', of course, and make up some rules to make this work out [2], but the alternative is cleaner, and also true of the real universe: all observers agree that A caused B, no matter what. This gives you an ordering of events in the universe, which in the real universe is measured by time.
If we have causality in our new universe, the next natural question is to ask how events become causally connected. Can an event happening at any point in the universe, affect every other point? Can the time between two events that are causally connected be arbitrarily short? Again, you could say 'yes', but this would be slightly unsettling: something happening right now in the Andromeda galaxy, for example, could kill us instantly.
If on the other hand, you say 'no', then you've introduced another guiding principle into the design of the new universe: locality. Something that happens at some point in space and time affects its immediate surroundings in space and time only, and does not immediately affect the whole universe at once.
What mystical things can I eat to grow taller?
>>7790502
How do I cure manletness. Pls give me suggestions! google is not enough.
>>7790502
Your veggies, like a good boy.
You can't do anything. Height is genetically determined.
My condolences.
