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Archived threads in /sci/ - Science & Math - 226. page
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Will I still get banned if I post a specific math problem I'm needing help with, if it's not homework?
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No, not as long as it isn't obviously homework, e.g. "Hey /sci/ what's the answer to this question? Thanks". Post it.
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>>7700569
If it's highschool tier then obviously yes.
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I don't undrstand why people here suddenly came up with that hate for homework. It's perfectly alrught to help others with homework. Just make it clear that it is homework in the OP, and people can give hints or show the general direction or explain how it's done. Giving just the solutions without challenges for the student should be banned, not asking for it.

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A colleague of mine scrawled out some equations on a whiteboard a few days ago. As far as I can tell, they are a set of cross-coupled, vector-valued, two-dimensional, first-order nonlinear differential-algebraic equations.

I don't know what context exactly they are from, but IIRC they have something to do with the intercept of ballistic trajectories.

I've tried pretty much every trick in the book to sort this out. They're not seperable, they don't match any well-studied nonlinear ODE, and none of the integral transforms are of any help.

Let's...
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For clarification, $x$,$y$,$x_1$, and $y_1$ all depend on $t$, but $v_0$, $\vec{V}_0$, $\theta$, $\vec{n}$, and $a$ are all constants.

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What is the answer to the sleeping beauty problem?

I understand the Monty Hall problem easily and I know and can apply Bayes theorem, but this problem I don't know the right answer to, I can flip back and forth.

I was actually steadfast with my belief in one of the 2 main answers when I first saw the problem but then after thinking about it a lot I started to see the other side.
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Two thirds of her interviews are on tails, and one third are on heads. So she should say "there is a one in three chance that you flipped head".
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>>7700483
1/3 of the time she is woken it will be heads. 2/3 of the time she is woken it will be tails. Really not that hard to get and I don't know why people who understand Bayesian probability have problems with this.
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>>7700584
>>7700593
This is the position I started out on, too.

Actually, I am now having a hard time considering the halfer position, but a few weeks ago I was. Fuck. I don't even remember the argument that got me.

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What diet has the best scientific support?
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>>7700289
eat a bit of everything, mostly vegetables
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I try to stick to the Mediterranean diet myself.
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Intermittent fasting has many benefits.

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Who /naturally stupid/ here?

>low IQ of 115
>not a natural at math, have to work hard to do it
>nowhere near genius level, will probably just be an average engineer

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>>7700249
Stop complaining and start working.
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>>7700250
I do work hard, and I do get good grades, but I don't know if I have the potential to do great things
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>>7700249
I'd you're above average you aren't stupid.

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tl;dr: I suck at math. How can I get better?

It's apparent that some people just have a mathematical mind. They have no trouble at all "seeing" numbers in their head and manipulating them. I've never been one of those types. I've always done much better at reading and writing. I flunked math every single year of elementary school, and I only received passing grades after that because I was in the remedial classes.

I won't bore you with the details, but I've been trying to become a smarter person, and I think I should build up...
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>>7700199

Seriously, the only way to get good at math is to practice over and over and over. Do problems until you can't forget the rules.
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I've been "math-y" at times and "not math-y" at times. It depends how much you do it. When you do it a lot, and the concepts fit in your mind and you see the relationships between them, you'll be able to manipulate them well. It has less to do with ability than you think.
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>>7700199
General rule of thumb, think geometrically, but work algebraically (this isn't to say algebraic intuition isn't important or helpful). Also, as the other anon pointed out, practice! Mathematics is not a spectator sport. Go back to the very basics and make sure you can do those and understand why they are true

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Who here also /putnam/?

I'm kinda freaking out. I'm a junior and this is my first year taking it, and I didn't prep at all because I was lazy.

I'm looking at practice problems now and I'm hardly coming close at all to a correct answer.

I suppose there's always next year.
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I'm taking it.

Why would you freak about about a non-mandatory exam that's taken just for fun and has no bearing on your potential skill as a professional mathematician?

Just relax, dude. If you do poorly, then great - you're like everyone else.
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>>7700118
im a freshman who is shit at math

do i have any reason to consider taking this
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>>7700124
Honestly? You have no business being there... if placing is your concern.
But it's just for fun, so just show up and see what it's like. It's just an experience. Don't worry about it.

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The last 3 brick houses I've lived in were all falling apart like this but -ONLY- in the area where the large plastic wheeled bins were parked.

Is it possible the bins themselves are somehow causing this? Wind? Static electricity?
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>>7700078
>>7700084
I'm guessing it's the excess insects or rodents that are attracted to your garbage.
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>>7700078
shit batch of mortar,

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We live on a planet, that lives in a solar system, which live in a galaxy, which lives in a universe, which lives in a higher dimensional universe, which lives in your mum.
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>>7700000
Fuck you, why did we need to switch from Rad to Gray? What was the problem with Rad? Is science just amusing itself at this point?
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>>7700000

no one gives a fuck

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what would happen if you jumped into a pool of capsaicin
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>>7699917
>>7699917
It would be extremely painful...
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You'll get a boner
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>>7699917
Probably nothing. Capsaicin only affects birds. You should do it anon

Why can't the US into overall high quality and quantity in science?
How will they survive if only a very small number of people are extremly high qualified while the Rest of the population is literally 3rd world shithole tier education-wise?
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Pic obviously unrelateted? Amount doesn't mean quality.
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>>7699781
I can confirm so.e countries make it painfully easy for you to graduate.
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>>7699781
Yeah right, quality of education obviously sucks in the top 5 countries...

It's measured per capita btw

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Serious question.

Would a solar shade help solve or at least slow down Global Warming? What would be the benefits and disadvantages of such scheme?

The UN seems to think this seemingly insane idea likely, since it has moved to banned any type of "planetary solar shade".
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If the shield is outside of our atmosphere, yes.
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One thing you have to keep in mind is that the sun is so far away that the beams of light are virtually parallel. In order to block 3% of the suns's rays you would need an object 3% the surface are of a circle with the Earth's radius. That's a big-ass fucking floating satellite.
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Just an idea, how terrible will inducing a small scale nuclear winter be?

Wouldn't there be enough residue to block enough light, or is it not that simple?

Inb4 tinfoil wrapped testicles

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If you put extremely cold water in ice will it cool it down more or will it be less cold?
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Dumb meme poster
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>>7699737
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>>7699733
Your Mom doesn't have a thermometer in the kitchen?

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So, does gravity abide by the speed of light?

I mean, hypothetically, if the sun were to blink out of existence would we fell the gravitational effect immediately or 8 minutes after?
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8 minutes after
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>>7699554
No.
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Speed of light.

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what are ideas? neural connections in the brain

so, if someone can map all neural connection of a specific idea, maybe he can also construct that neural connection in other brain. It will be a complete idea transfer between two brain.

You won't use words to explain something to somebody anymore. You will only tranfer your idea to the persons brain you're talking to.

It has a quite wide use. Not more reading books or learning something by classical method. You only will download all neural connections necessary.

You guys believe will it be...
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Transplanting a neuron cluster from one brain to another would be like cutting out a random bit of machine language code from one program and putting it in another. There's the slightest chance that it'll do what you want but most of the time it would just as good as random bytes.
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