Archived threads in /sci/ - Science & Math - 362. page
Images are sometimes not shown due to bandwidth/network limitations. Refreshing the page usually helps.
What is the clue to solve delta-epsilon proofs?
Pick any epsilon, find delta
>>7846590
Get gud with inequalities
The Cauchy-Schwarz Master Class: An Introduction to the Art of Mathematical Inequalities by Steele
Inequalities by Hardy, Littlewood, and Polya
>>7846590
Do you have an example that you'd like to work through?
General methodology:
- Work backwards, start with the inequality bounded by epsilon that you want to obtain and try to work back towards being bounded by delta, then choose that delta.
- Leave gaps in your work and jump to what you would like to achieve. Sometimes the delta to pick becomes obvious that way.
>are abandoned on mars
>no prefab shelters
>no seeds to grow crops
>5 hours of oxygen left
How do you science the shit out of this? Failure is not an option.
what the fuck lel. They didn't edit out the plants on the left side of the screen in the movie ? Thats bad directing right there if you ask me
>>7846563
You have to give more descriptions, bro. Is there a spacecraft nearby? Some way out? If not, it's just impossible to get out of the planet, of course. The land isn't fertile either so anybody in that situation would be screwed and would have to just wait for death.
>>7846578
>expecting to be prepared in a situation like this
Kek. You must be an engineer.
I stopped caring about math when I was introduced to the concept of imaginary numbers. What a crock of shit. If your equation can only be solved by inventing numbers that can't exist, like some kind of math deity , then you are fucking wrong and the math is flawed. Same for algebra solutions that basically say "the correct answer is whatever the correct answer is". Thats what the math said transcribed to words but god forbid if i wrote in down in english instead of the ancient math runes the teacher word mark me wrong.
Math is logical and numbers never...
Comment too long. Click here to view the full text.
>>7846556
Here's your (You)
>>7846556
I realized imaginary numbers were real when working on precession. a 2D number plane is the only way to explain it. You see precession is all about addition of angular momentum causing a rotation. How can you add something to get a rotation on a 1 dimensional number line? There must be a second dimension orthogonal to it that it goes through in order to end up rotated.
>>7846556
Oh man, I guess Electrical Engineering is bullshit then, wonder how all those electronics ended up working when designed if imaginary numbers are a crock.
>field with one element
>mathematicians investigate it
>>7846555
there is no field with one element, you mong
>>7846656
>assuming fields must have 1!=0
might as well assume that all conjectures are true.
It's not interesting because there are no ring maps out of it and the zero map is the only map into it from any other ring.
Any Americans here ?
I'd like to know what do you learn in highschool in mathematics and physics. I searched on the internet but there were no clear results.
I'm in 12th grade right now. Intending to major in Physics.
In science I'm in AP physics C ( E&M and Mech) It's pretty fun actually.
In math I'm at the equivalent of Calc I or Calc AB.
Most people do Physics C and Calc BC together - which is Calc II in the US.
>>7846571
What do you learn in Calcul I and II ? I would like to compare it with what I learned in France (I was in the equivalent of the 12th grade last year).
>>7846571
As a non American, what does any of this mean?
>AP
>Physics C
>Calc I, AB, II
What makes something nuclear?
When neutrons are so packed it takes a small amount of energy to make the atom release them into other atoms and so on until you have a chain reaction which creates anime.
you mean "radioactive". Radioactive material is something that has unstable isotopes. This means it's made of atoms which undergo fission (with some probability). Since fission releases energy and neutrons, it's dangerous to be close to a radioactive material. They are easy to spot though since they give out heat so they tend to glow and are warm to the touch.
Ask big boss
The theory of quantum tunnelling derives mathematically the result that particles have a non-zero probability of passing through a barrier which in classical mechanics would be impassable. It predicts that particles can pass through walls.
Now a ball is clearly made out of particles. Therefore there has to be a non-zero probability that a ball can transition through a solid wall.
Why has this never been observed?
There have been hundreds of thousands of recorded sports matches with balls, but not even once did we see a ball transition through a wall. Not...
Comment too long. Click here to view the full text.
>>7846336
>Why has this never been observed?
Quantum effects only happen on very small scales
>>7846336
Goddammit? Now that OP has debunked tunnelling I guess my STM will stop working. Damn.
gr8 b8 m8, i r8 8/8
Looking to identify some stones that belonged to my Great Grandfather.
Number 1.
And the last one.
One more, for scale.
Why does it take six years to teach kids addition, subtraction, multiplication, division and fractions?
What things should be taught in elementary?
because kids are dumb
Basket weaving tag hop skotch memes beyblade and yugioh.
>>7846302
>Why does it take six years to teach kids addition, subtraction, multiplication, division and fractions?
Because teachers hate math and try to skirt teaching it as much as possible.
>What things should be taught in elementary?
Arithmetic, Algebra, and Logic
So /sci/,
what board games are you playing with your non-pleb friends?
>>7846255
>board games
it's 2016, not 3000 bc
we play online games
>>7846258
This OP, we all play highly intelligent, and extremely strategic games like dota, lol or hearthstone, not your sissy, casual monopoly shit.
>>7846255
league of legends
former sc2 gm and #1 bf3 pilot lol
Why do people believe superintelligent AI could solve all our problems and rule the world and do all other sort of magic stuff?
>>7846260
>people keep posting an image of a book they probably didn't even read themselves
Well excluding the magical stuff, a lot of our problems as a society can be solved be a smarter problem solving, state budgets for example, there are many factors, some of them are interwined some are not, over all this is a kind of task AI's are good at, AI doesn't have to be perfect, and by AI I don't mean the conscious bullshit, it's simply a program that preforms a task that wan't explicitly programmed and improves somewhat with experience, AI can be exremely helpful in the future, but it's not the second coming of jesus.
What are the biggest public health memes?
Tap water is in any way dangerous
>inb4 rajeet shitposts on how his country has faeces in their watrer
>>7846228
You don't need to be Rajeet to live near a fracking facility and drink lead water.
>You can get a cold from standing outdoors when it is cold.
>If your hair is thinning, shave it and it will grow back thicker.
>Condoms are extremely effective in stopping transmission of viruses such as HIV and HSV.
>HSV is dangerous and ruins your life forever.
>A glass of red wine a week is good for everyone.
>Eating fat makes you fat; avoid fat at all costs.
>Sugar...
Comment too long. Click here to view the full text.
How can humans compete with actual gorillas?
>bigger muscles
>don't need jobs for survial
>vegan
>don't even bother lifting
No wonder all those women in Japan have been going over to the gorilla and visiting the Zoo just to see the gorilla. Gorilla theory is an new theory stating that women's sexual attraction is really the gorilla due to their combination of height and frame. Gorillas have bigger frames than humans and...
Comment too long. Click here to view the full text.
>>7846213
>don't need jobs for survial
they live on welfare, from the zoo
Human skeletons are more aesthetic.
>>7846227
because you are a human and you are biased to see human shape as more aesthetically pleasing
your privilege, humans pls check.
> its got a bigger brain
> can't even walk
This proves that smaller brains means better intelligence :^)
>>7846096
bigger brain = more rape
>>7846096
I dolphin brain is superior, why do they tricks for human entertainment?
Dolphin make bubble hoop to copy human technology and practice gangbang.
Why no dolphin city? Why no dolphin space race?
If I feed hornworms carrots all their lives will they turn orange?
What color will the moths be?
Sorry if this belongs on /an/ but they're all women who own cats, they don't know this stuff.
why don't you try it and find out
>>7846053
I don't have any hornworms, and if one gets loose it could cause an agricultural nightmare!!
>>7846046
it took me exactly 2 mins of google search to look for this :Tomato hornworms are known to eat various plants from the family Solanaceae, commonly feeding on tomato, eggplant, pepper, tobacco, moonflowers and potato. Accordingly, they are often found on defoliated tomato plants, the caterpillar clinging to the underside of a branch near the trunk. They are difficult to spot due to their green coloration. Tomato hornworms fluoresce differently from tomato leaves. Using an ultraviolet light source of 375 nm and viewed...
Comment too long. Click here to view the full text.
