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Archived threads in /sci/ - Science & Math - 1961. page

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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
6 posts and 1 images submitted.
>>
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?
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>>7795796
it's for a class I'm taking intro to computer science
and thank you
>>7795792
basically I need to represent a pair made of (COLOUR, NUMBER)
there are 7 colours and 100 numbers (from 1 to 100) how many bits do I need to represent all possible combinations

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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
8 posts and 1 images submitted.
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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.
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>>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?
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>>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.

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What mystical things can I eat to grow taller?
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>>7790502
How do I cure manletness. Pls give me suggestions! google is not enough.
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>>7790502
Your veggies, like a good boy.
>>
You can't do anything. Height is genetically determined.

My condolences.

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How big is the universe?
If you could behold all the universe from afar, would you see some colossal pattern?

How small do things go?
What makes up the things that makeup the things that make up atoms?

If there a type of "life" on these mega and quantum foam levels which incorporates the sums of the human-known universe as its parts?

We will never ever know these answers. They may as well be >>>/x/ related for all it really matters. But, damn it, can we discuss things we know nothing about for a change? (heh, guess most of us have been doing that since /sci/ began.) Theories anyone?

>image source
https://www.youtube.com/watch?v=C2vgICfQawE
29 posts and 6 images submitted.
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>>7788594
everything is cellular automata. because it is able to emulate boolean logic gates (watch the second video of this guy)

well you can observe oscillating objects with as little as 3 points in a 2D array

Stephen Wolfram used this to write mathematica and explained it in new kind of science. It's a very interesting field and I can't wait to get srs with it
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>>7788620
>Stephen Wolfram used this to write mathematica and explained it in new kind of science. It's a very interesting field and I can't wait to get srs with it

This?

https://www.ted.com/talks/stephen_wolfram_computing_a_theory_of_everything

Watching now.
>>
>>7788594
>How big is the universe?
It's infinite.

>If you could behold all the universe from afar, would you see some colossal pattern?
It's uniform.

>How small do things go?
The smallest we know of are the fermions and bosons, such as electrons and photons.

>What makes up the things that makeup the things that make up atoms?
Fermions and bosons.

>If there a type of "life" on these mega and quantum foam levels which incorporates the sums of the human-known universe as its parts?
No.

>We will never ever know these answers. They may as well be >>>/x/ related for all it really matters. But, damn it, can we discuss things we know nothing about for a change? (heh, guess most of us have been doing that since /sci/ began.) Theories anyone?
They're called astronomy and particle physics. Just because you are ignorant of them doesn't mean everyone is ignorant.

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If you're a math major. From pre-calc to now, include books if possible.
>CS
Foundations - c++ bjarne
Theory - Automata Ullman
OS - tattenbaum
Compilers - Dragon book
Discrete maths - Rosen
Calc - Stewart (it sucked ass)
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>>7786231
I got a degree in pure math, now I'm reading through the java and algos book by sedgewick
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>>7786238
Sedgewick is pretty good , how are you finding them as a former mathematician
>>
>>7786231
Freshman math major here (yeah, I'm a faggot, shut up)

>pre calc
I don't know, some shitty McGraw or Pearson public school book used only for problems.

>Calc BC
Calculus by Demana. Also used just for problems, my excellent teacher covered actual material in lecture

>Honors Mathematics (name of course)
Vector Calculus, Linear Algebra, and Differential Forms by Hubbard and Hubbard. Only book I know of like this, with exception of whatever book they use for Math 55 at Harvard.

if sleep is important for cognitive function, then why dont we sleep 2 times a time 4 hours a pop? >pic related, read the 3rd paragraph
5 posts and 1 images submitted.
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>>7795711
Because sleep cycles are something that are eventually established through evolution.

Evolution doesn't care about your efficiency in learning, it cares about your ability to eat and not die.

People who sleep when it's dark and hunt all day rather than sleeping 4 hours of the day survived more.

Presumably.
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>>7795711
Albert einstein did just that.
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>>7795711
Because we evolved on Earth.

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>basically a perfect landing even with the waves
>one of the leg lockouts failed and it folds up, letting the rocket tip

GOD DAMNIT
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>>7794546
Shit's hilarious. SpaceX is doing a good job though considering they're a private organization.
>>
>>7794546
Turns out that if you cut corners in something as complicated as space vehicles then you end up with something that's unsafe and ineffective.
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>>7794546
If they had 5 legs, it'd probably have remained standing.

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Has there ever been any documented proof that secondhand smoke actually harmed or was responsible for someone else's health declining? All I see are government numbers and frivolous court cases.
23 posts and 3 images submitted.
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>>7792640
oh look, it's this thread again
it's not like we had this exact same topic being posted over and over again for the last fucking month now
what unique, intelligent and original content
we should give OP a prize or something for being the mindblowingly creative faggot shill that he is

sage goes in all fields
>>
>>7793588
It isn't really my fault that no one has been able to present solid evidence that another person was harmed by passive smoking.

Point is, I haven't seen any studies that link secondhand smoke to lung cancer, or other serious, chronic illnesses for that matter. If anything there are actually non tobacco funded (so you can't scream conflict of interest) studies showing no link between smoking and perfectly healthy people developing any chronic health problems. There were also studies showing no negative effects associated with passive smoking in relation to cardio problems or heart problems.

But since challenging the scientific consensus is not welcome here, I'll just go "shill" somewhere else.
>>
I dont know one way or the other, but I assume it would be kind of difficult to test this kind of thing.

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Is this a giant space slug? Is that even possible?
2 posts and 1 images submitted.
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>>7795732
You know, I've thought about this long and hard (just like my dick) and I think that that is probably not a space slug.

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Ple.platoweb Algebra S2 post test answers link?
3 posts and 1 images submitted.
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>>7795622
http://lmgtfy.com/?q=Ple.platoweb+Algebra+S2+post+test+answers
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>>7795627
Didnt help. Couldnt find a link

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Hey /sci/entists.

My wife is under the impression that she needs to squeeze out any kids she wants by or before age 30 ish as, she believes, the likelihood of birthing an autist increases by some percent every year she waits longer.

Have you ever heard or seen anything of this nature? I can imagine why this might be the case but she has shown little evidence to support the claim.
4 posts and 1 images submitted.
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>>7795505
You could just google this one, you know?
But your wife is correct, as a woman ages the chances of her eggs producing fucked up kids is increased. The same goes for your sperm as you age.

However, a kid at 30 won't necessarily be autistic. Just know that every year you add a 0.01% chance for it to be autistic, or to develop any other problem.
>>
>>7795505
>the likelihood of birthing an autist increases by some percent every year she waits longer.

I don't know about autism, but the likelihood of birthing a kid with downs syndrome increases with the age of both parents, but is more strongly correlated with maternal age at conception.
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>>7795511
I know, and I appreciate the input, I know you guys aren't my personal research team, just curious if anyone else actually took those statistics seriously or if it was a bending of the truth.

Is there a particular reason for this though? Should we all be reproducing at a younger age? It makes me wonder because women and men can donate eggs and sperm for later use, do those facilities take age into account?

Again sorry, don't know who else to discuss this with.

>tfw physics major
>tfw thought up about amazing physics ideas in the shower
>tfw never tried to prove them mathematically
>tfw forgot them
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>>7795119
>>tfw never tried to prove them mathematically

You came up with nothing.
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>>7795123
ideas -->> math -->> revising -->> draft paper -->> peer review -->> professor review -->> check up on math -->> publish paper
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>>7795119
If you're doing physics and trying to prove your ideas rigorously then you're doing physics wrong. Honestly I can't name the last advancement in physics that was mathematically rigorous.

Not that I'm saying there's anything wrong with rigour, but as a physics major that's not something that should be your primary concern, unless you're doing postgrad in mathematical physics.

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How does /sci/ feel about the Simulation Hypothesis? Y'know, the theory that our universe is a simulation done by a supercomputer and programmed in a 4th dimension. It's been able to answer a lot of questions that materialism cannot.

Thoughts?
17 posts and 1 images submitted.
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i think it's plausible. a few years ago it would've probably been dismissed as total bs but now it can actually be taken seriously. also OP your file name is gay.
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>>7795035
At best an extraneous, unprovable idea about reality.

At worst an extraneous, unprovable idea about reality that causes a lot of shitposting.
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>>7795035
debates about solipsism are like fleshlights for pseudointellectual philosophy majors.

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GJ 1214 b this planet has made me wonder what life could survive in its large pressures and gravity, like how indestructible these animals would be? I guessing pure exoskeleton life forms will levvery common in planets like this .
2 posts and 1 images submitted.
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>>7794960

Everybody would turn to manlets

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Why there isn't a cure for herpes??

Got it from a slut on sunday and I want to die.


(IDK if this is OT, sorry)
41 posts and 5 images submitted.
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It goes away after like 10-15 years. Maybe longer.

I once had one of those dirty shot girls in New Orleans try to kiss me with her herpes mouth. You're an idiot if you couldn't tell there was herpes all up in whatever you touched.
>>
>>7794857
most people have it dormant anyway.

treat it, it's no big deal.

least u smoke ciggs and fukk slutz anon
>>
>>7794869
>it's no big deal.
then why do people want to cure it

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