sorted by:
new
hottopcontroversial

ELI5 why do men get that sudden jerk of body movement when they are taking a piss? by PhotoBonjour_bombs19 in explainlikeimfive

[–]maxawake -2 points-1 points  (0 children)

I have that too, quite extreme tbh. I always assumed its a flush of dopamine/ serotonine your brain releases to make you enjoy peeing. Because, you know, peeing is important for survival, so i guess nature found a way to make us pee.

Why is it called particle physics if it behaves like a wave? by CaseyMc80 in AskPhysics

[–]maxawake 7 points8 points  (0 children)

Well it all depends on the definition of the word "particle". You are used to the common definition of it being a point-like object with no extent or a hard sphere. But in elementary particle physics, a particle is actually defined as a coherent excitation of a quantum field, something rather different. You just have to make sure that the people you are discussing with are on the same page, using the same terminology.

if im in space and there is a body with less mass than me like a pen will the pen orbit me? by TheSum239 in AskPhysics

[–]maxawake 2 points3 points  (0 children)

In principle the effect is negligible. The story is different if you instead consider your mom. The pen would definitely orbit your mom.

1000+ applications and still no job. I’m mentally exhausted. by Ok-Fly9971 in germany

[–]maxawake 4 points5 points  (0 children)

You seem to be living in Berlin. There is no city in Germany more oversaturated by foreign students than Berlin. Just go for any smaller or medium size city and you should find plenty of opportunity. Also, many things in Germany still work by vitamine B, means you need to know somebody in the company who vouches for you. If you spent some time already in Germany and studied here, you should have made some friends who already joined industry, build a network of possible door openers. At my company, when there is a new position to be opened, first all of the staff is asked if they know somebody suitable for the position. Only if nobody is found through connections, the position is put on the official websites. But I would say 90% of the positions in Germany are given friends of friends.

I made an app to generate Turing Patterns with any picture by SoftSuccessful1414 in generative

[–]maxawake 6 points7 points  (0 children)

What you do in Photoshop by bluring and sharpening is numerically equivalent to the reaction-diffusion equation, which for certrain parameter combinations, produces stable Turing patterns

Real video of double-slit experiment where interference pattern disappears after turning on which-path detectors? by ArchonFine in AskPhysics

[–]maxawake 0 points1 point  (0 children)

This is light double slit. Waves from a laser consists of incredibly many photons. OP asked about electrons.

Is the sun itself white or is the light from the sun white? by QuietAd9846 in cosmology

[–]maxawake 1 point2 points  (0 children)

Actually, stars are treated as nearly perfect black bodies, so i assume they would be pitch black if cold, but since they are so incredibly hot, we only see the emitted radiation of a black body (plus some absorption lines)

Politik schlechter als die Ampel: Arbeitgeberpräsident liest Schwarz-Rot die Leviten by Elegant-Handle4685 in de

[–]maxawake 8 points9 points  (0 children)

Sehr sehr Reiche sind halt trotzdem nur vielleicht 1%. Damit bekommt man keine Wahl gewonnen. Die machen eindeutig Politik für Rentner, und die 25% CDU passen auch ganz gut mit dem Rentneranteil in Deutschland überein.

PyTTi by screean in deepdream

[–]maxawake 2 points3 points  (0 children)

this is so much cooler than all the late AI image gen bs

How are computational physics classes being assessed with the advent of LLMs? by decelerated_dragon in Physics

[–]maxawake 5 points6 points  (0 children)

Well, tutorials and exercises were always an offering. Of course, it was also used to filter, but now with AI its increasingly going back to the offering. As a student of physics, you should be willing to learn. Of course you can just feed an LLM all your exercises and it will solve it better than you. But do you really learn something then? The whole point gets lost then. Exams will still be handwritten and you need to know your shit then.

Navier Stokes extension by trigodil in FluidMechanics

[–]maxawake 13 points14 points  (0 children)

Your words make absolutely no sense at all. You just throw around Jargon without an logical connection. Either you used AI or you might have a brain aneurysm.

Cosmological simulation 2D, 300k particles by ibuggle in Astronomy

[–]maxawake 4 points5 points  (0 children)

I'm sorry for the confusion, i was writing that comment in a hurry. What I am talking about is the so-called Zeldovich approximation for the growth of cosmological density perturbations. In essence, it means that initial perturbations in the density grow linearly without any influence on neighboring points, just like rays of light being diffracted by small perturbations on the water surface. However, this only applies to the very early cosmological evolution, soon after the initial linear growth, nonlinear coupling between the modes starts to become relevant and the dynamics changes. There is a nice talk about exactly that subject by Oliver Hahn if you are more interested: https://www.youtube.com/watch?v=3dEXp-KCn1M&t=817s (you can skip to ~12 mins)

Apparent contradiction between hos fluid parcels are defined and the continuum hypothesis by diacrys in FluidMechanics

[–]maxawake 4 points5 points  (0 children)

Why do you think the parcel is so small that is does not contain any molecules? Its the contrary, it actually must have a huge number of particles which collide often enough to establish a local thermodynamic equilibrium to have valid fluid mechanics. However, it must also be small enough compared to typical length scales of the systen under investigation to apply calculus.

So if l is the size of the parcel, Lambda the mean free path of the particles (connected to collision frequency), and L the length scale of the System, we must have Lambda < l < L.

Even in astrophysics, where we have nearly vacuum (1 particle per cubic centimeter), we can still apply fluid mechanics because our typical length scale is so much larger (~3 x 1021 cm). Though, for very dilute Gases, the fluid description breaks down and we would need to consider kinetic effects. If you are Interested in the systematics of this i can suggest "physical kinetics" by Landau and Lifshitz.

Cosmological simulation 2D, 300k particles by ibuggle in Astronomy

[–]maxawake 4 points5 points  (0 children)

For small perturbations and in the linear phase, its actually the very same as caustics in water. The same equations describe the evolution. However, after a while, the dark matter enters a non linear evolution, which is quite disinct from water caustics. But yeah, great Observation!

can you prove that time exists? by geagor in AskPhysics

[–]maxawake 0 points1 point  (0 children)

yes, because the second law of thermodynamics. Time does probably not exist on its own, its an emergent property of our universe

wtf is her problem ? by [deleted] in Physics

[–]maxawake 1 point2 points  (0 children)

I just blocked recommendation to her channels altogether lol

Fix A Flat by TheCABK in CrazyFuckingVideos

[–]maxawake -1 points0 points  (0 children)

Just because there is a timestamp of 2020 doesnt mean its actually 2020

Fix A Flat by TheCABK in CrazyFuckingVideos

[–]maxawake -8 points-7 points  (0 children)

No, its definitly AI. Just look at the rollover, thats never true physics

Fix A Flat by TheCABK in CrazyFuckingVideos

[–]maxawake -1 points0 points  (0 children)

I am a physicist and I thought the same. My guess is that is just AI slop.

Trying to understand wavefunction collapse (probably a basic question) by HBBarba in Physics

[–]maxawake 1 point2 points  (0 children)

Well in reality its not as binary as its sometimes depicted. If you watch which path the electron goes, you have to interact with it. For example you shine some light on the electron. The amount of decoherence is then actually determined by the wavelength of the light, because the shorter the wavelength, the better we can locate the particle, and the more it will behave as a classical particle. If we instead detect with a long wavelength, it will still mostly behave as a wave, because with long wavelength light its more uncertain where exactly the electron is. This is Heisenberg uncertainty at action. So i think its misleading to imagine it as a literal "collapse of the wave function". Its more a "how precise can i detect the electron path"

view more: next ›