Readit NewsIt would be useful to allow more organ trading in general, not just in blood or blood plasma.
Iran is one of the few countries that allow you to pay eg kidney donors. Guess who doesn't have a waitlist for donor kidneys?
It is controversial to put into system letting people sell their bodies to make ends meet.
hansbo commented on To buy a Tesla Model 3, only to end up in hell myteslaexperience.com/202... · Posted by u/lleims
The Weierstrass function is cool but the undisputed champion of calculus counterexamples has to be the Dirichlet function[1]
f(x) = 1 if x is rational, 0 otherwise.
It is defined over all real numbers but continuous nowhere. Also if you take the Dirichlet function and multiply it by x so you get
g(x) = x if x is rational, 0 otherwise
…then you have something that is continuous at exactly one place (0) and nowhere else, which also is pretty spectacular.
It is unintuitive to me why the rational numbers are dense in the reals, since rational numbers are countably infinite, as opposed to the reals. I think infinity is hard to grasp.
"Why" is more of a philosophy question, pre-scientific or a-scientific if you like. Science question would be "How". Maybe not this particular Q, but having in mind that on every A-answer, one can again ask Q-question "Why". That's more philosophy not so much science, imo.
I don't think it explains "How" either, in this case.
Isn't the primary experimental argument beta decay from that link? A nucleus can emit a positron, and observably loses nuclear charge equal to one positive electron.
So by a pretty simple inferrence you could conclude the proton has a positive in it, hence the charge (it of course isn't literally like this for other reasons though).
And since we also observe antiprotons, the opposite can clearly apply.
So a proton can emit a positron. Does that mean that the positron is somehow "part" of the proton? Does it mean that their wave functions interact in some specific way? Is there another reason?
Quantum physics has always bothered me, personally, since I find it difficult to understand reasons. Not philosophical reasons, I am fine with axioms and foundations to models, but rather intuitive reasons why it works a certain way. I know it is an extremely strong theory which makes unexpected, later confirmed, predictions, but there is a frustration that the only explanation to things is "math".
No one who has replied to your question has got the right answer. https://physics.stackexchange.com/questions/21753/why-do-ele... has the right answer. There are multiple aspects to this argument, but essentially, the symmetries of your system force the charges in the Standard Model (quarks and leptons) to be the way they are due to gauge anomaly cancellation. If you believe in quark confinement, which is extremely well motivated, computationally, theoretically and experimentally, then the fact that the proton has exactly charge +1 follows naturally.
I am reading this as "it has to be this way, or the model does not hold", but it does not explain why. What causes it? Consistency of a model cannot be the ultimate reason, right?
hansbo commented on How to Make Your Own Spooky Magic Eye Pictures (Autostereograms) blog.demofox.org/2023/10/... · Posted by u/jstanley
for those who can master it, here is Tetris to play: https://www.deviantart.com/3dimka/art/3D-Stereogram-Tetris-3...
I was never able to see stereograms, the most I was able to pull out was to see it inverted (x seeing with eyes, while the opposite is required).
Fun, but extremely unpleasant. The more stressed I get the more difficult it is to relax my eyes and see the pattern.
Like leaving your door unlocked, because you live in such a sketchy neighbourhood that everyone else always locks their doors.