/sci/ - Science & Math

i too wanna know opee

post more ass in the meantime

>>9944129
>How do gradients exist?
I dont understand the question. A gradient is just a derivative with respect to space.
>How does an area of high pressure "know" to proceed to the area of low pressure, especially if there is a barrier between the two
Newtons Laws. A partical sitting in a place where there is a pressure gradient will experience more pressure on one side of it than the other, pushing it toward the region with less pressure.

>>9944129
>be in crowded corner of bus
>move to less crowded cause its more comfy
>everyone does so until theres same max distance for everyone for max comfy

>>9944129
It's just atoms bouncing around and shit. Also newton's laws. More atoms banging hard on one side with less banging back on the other moves the barrier.

>>9944164
No but like how do the atoms "nkow" like does someone tell them?

>>9944465
Yes, God made gradients.

>>9944129
Because of the second law of thermodynamics.
States in which the pressures are equalized are massively more likely than states in which there is a pressure gradient. It doesn't know to equalize pressure, it just happens that it is so much more likely that you will never ever see the pressure change in the reverse direction.

Is that tape allowed at competitions?

What's stopping someone from covering their shit in layers and layers of tape to store and release the potential energy to jump farther?

You mean convection? Since it's brainlet tier - it happens in pot of water on a stove because of gravity: heavier, colder particles are pushing on the lighter, hotter particles and thus cause their upward movement.

>>9944129
we are going to need more of these pictures before we get to talkin boss.

>>9944129
It doesn't know, for example the gas inside a bottle is always pushing against the barrier, non stop. It moves over as soon as the glass breaks, simply cuz the barrier is gone.

>>9944485

OP here, thanks guys, for once I got an honest answer. I'm satisfied.

>>9944708

No I mean as in an aerofoil.

How does the force generating lift between the lower pressure air flow at the bottom of the wing "know" about the lower pressure air travelling over the top of the aerofoil.

There's a solid barrier between the two, so what exactly signals to the force that there is a differential in pressure, and what then compels that force to act?

>>9945055
>lower pressure air flow at the bottom of the wing

Derp, obviously meant higher pressure.

>>9944455
>implying people don't just aglomerate next to the door

>>9945055
The air pressure is the same...
The wing however pushes air downwards, which generates lift
It works via the coanda effect

>>9944129
Imagine a particle, lets call it brainlet, sitting at the center of pic related. All of the particles in the image are randomly moving around and bumping into eachother (temperature), the probability of brainlet being hit by the left side is much greater than the right side (because there are more particles there) so brainlet will be pushed to the right. This applies to all the particles so they will diffuse to the right.

That being said, brainlet cold perfectly be hit in just the right way by particles to his right and move to the left, but the chances are much, much lower, so in agregste that happening to all particles is virtually impossible.

>>9944465
Impact of other particles.

>>9944129
>How does an area of high pressure "know" to proceed to the area of low pressure, especially if there is a barrier between the two?
See Fick's first law, anon. It's purely a statistical thing.

>>9945055
Two questions:
Why would the air have to get to the other side in the same time instead of the same speed and how come airplanes can fly upside down?
Also, I've seen many older aircrafts which had symmetric wing shapes

>>9945805
Isn't Ligma effect more relevant here?

>>9947495
>what is ligma effect?
> Ligma balls!
XD

>>9945805

That accounts for only a small amount of lift generated by the aerofoil. The largest is the force caused by the Bernoulli effect.

>>9945874

Alright, now put a solid, non-permeable barrier between the two.

How will the higher density particles know to bang on the wall opposite the low density volume, and generate a force towards the low density volume?

>>9947495
Go back to redddit or lurk a bit more

>>9947495
Based

>>9944129
It doesn't. It just moves. Statistics is what tries to get things to distribute evenly. If I put 10 balls on one side of a box, 2 on the other side, and then shake the box, I'm more likely to find the balls evenly mixed throughout the box than in their original distribution.

Statistics drives diffiusion.

>>9947619
All the particles bang on the wall equally, so if there's more particles on one side there's more bangs on that side

>>9945932
but how do the other particle knows, you can´t explain particles by using other particles

>>9948469
I don't know why you keep personifying particles with thought, the particles don't have to do anything, the net movement is a result of the aggregate force, that's why people have been replying to you with more particles, more force. This is not using particles to explain particles, as you say, it's using the behaviour of individual particles to explain the behaviour of large amounts of particles

>>9948469
brainlet. It's a consequence of sugondese law

>>9947619
All of them bang. On the higher density side there's just more banging so net force is from high to low.

>>9947563
LOL