Explain Definition and 1000 Threads

I'm a student in South Korea(It is my first English question ever). I found descriptions of quantum tunneling explained by the uncertainty principle in Korea. There are two kinds of descriptions to explain quantum tunneling; position-momentum and time-energy uncertainty principle. First...

Hey everyone! So I have attempted this Q which is shown below I had a go at all the parts and I think they are right but I'm not so sure on what answer to give for c)iii, I mentioned about the ratio of protons to neutrons but I'm not sure if that is necessary over here? Any help would be...

Could you please explain Azeotropes in detail? I find it really difficult to wrap my head around it. The only thing I know is Azeotropes are the mixtures whose composition is the same in both vapor and liquid state. This might be a stupid question but why and how is the composition the same? If...

I was read this article(https://engineering.purdue.edu/wcchew/ece604f19/Lecture%20Notes/Lect31.pdf). I was read this paper about Huygens' principle(https://engineering.purdue.edu/wcchew/ece604f19/Lecture%20Notes/Lect31.pdf) Main idea of Huygens' principle is how wave function ##ψ(r)##...

I've google all the keywords like "eductor", "ejector", "Venturi pump". All of them are the mechanism or applications that utilize "Venturi Effect". All of them are trying to explain the "suction effect" by saying that restriction area makes the fluid's velocity higher and hence lower pressure...

Any one can help deduct the process to obtain the following equation? n= squart(ε*μ), n=refractive index, ε=relative permitivity, μ=relative magnetic permitivity. I am reading a book relating to spectroscopy, and saw the above equation. I am really interested how the scientists got this...

In physics, the concept of absolute time and absolute space are hypothetical concepts closely tied to the thought of Newton. Absolute, true and mathematical time of itself, and from its own nature flows equally without regard to anything external. There is another term duration measures...

Homework Statement:: A particle with mass m is effected by potential V(x) = ∞ when x<0, -V0 when 0<x<a, 0 when x>a A) Set up a relation from which the energy for bounded states can de determined B) For which values V0 does the particle have only one bounded state? Homework Equations...

As a Computer Programmer, it's hard to wrap my head around Quantum Entanglement and non locality being explained in the context of Classical Physics. In other words, if the universe at it's core is physical where does Quantum Entanglement fit within a physical picture of reality? There's been...

According to pascal's principle a change in the pressure applied to enclosed fluid is transmitted and diminished to every point of fluid and to was of the containing vessel and my question is how this happens.

Problem Statement: Precised to its constant . Thank you! Relevant Equations: Below En

Sol: ##Mg.sinθ - μMg.cosθ = ma## ##a = g.sinθ - μg.cosθ## Now ##S = ut + \large\frac{1}{2}\normalsize at^{2}## but ##u = 0## ##t = \large\sqrt\frac{2s}{a} = \sqrt\frac {2s}{gcosθ(tanθ- μ)}## My questions: What is the meaning of " PQ = s" in the question? How ##t = \large\sqrt\frac{2s}{a}...

here delete, thread, and const are obviously keywords, I saw this when the system libraries threw a breakpoint, not my code, I'm new at this and that line of code makes very little sense to me, afaik, (const thread&) should be a conversion operator, how can you set an operator to a statement...

what does it mean when you say the stars all fall in on each other?And what does the line uniform distribution of stars outside this region mean?and what does this line mean- again fall in?what does fall in mean? would really appreciate some help in understanding the meaning in simpler words...

If one considers the kinetic theory of gases, can a first order estimate of thermal transfer be performed by considering momentum exchange at the container's surface? I understand the basics of explaining and calculating pressure with the kinetic theory of gases, but if we assume energy is...

##R_{X} = \sum F_{X}## ##R_{X} = 750.sin 60^{0} + 250## ##R_{X} = 899.52 N## to the right. ##R_{y} = \sum F_{y}## ##R_{y} = 750.cos 60^{0} - 1250## ##R_{y} = - 875 N## ##R_{y} = 875 N ## downward ##R = \sqrt {R_{x}^{2} + R_{y}^{2}}## ##R = 1254.89 N## ## tan θ_{X} = \large \frac...

These are the experimental results for the energy levels of Samarium-154: From 0+ to 8+ I recognize rotational energy: $$E = \frac{l(l+1)\hbar^2}{2I}$$ But from there on I do not know how to justify the rest. I have been reading that we sometimes get energy diagrams like above for even-even...

Summary: Nonperturbative top-Higgs effects proposed to explain all violations of lepton universality Three years ago, Froggatt & Nielsen wanted to explain the, apparently spurious, 750 GeV resonance as top quarks bound, not just by the gluonic strong force, but also by the 'Higgs force', which...

Heat is taken from food in the refrigerated space to the evaporator which has evaporated (I am assuming saturated vapor) refrigerant flowing through it. My first stumble would be, if this is true, why doesn't the temperature increase for the fluid coming out of the evaporator (unless it is...

Apparently the initial distribution for this problem, P_0 = ( 0 0 1 0 0 0 0 0 ) but I do not understand why there are 8 entries?

Hello! I want your help for core losses on how to calculate core loss on a toroid core?

Since for the two events of Samir starting the stopwatch, and the stopwatch reaching 10.0s, Samir and his stopwatch are stationary from his own frame of reference, I said it was the proper time and that delta t0 = 10s. Then the speed of the moving frame of reference was 0.6c. I thought placing...

What activities can one use in explaining collision theory to secondary level students?

I am posting this question separately from the ongoing thermal interpretation thread started by @A. Neumaier since it is a question about a specific experiment and how that interpretation explains it. The experiment is the Stern-Gerlach experiment. For concreteness, I will specify that we are...

I'm a student trying to explain quantum superposition without using Schrodinger's cat. Instead, I'm trying to use the principal of wave particle duality to explain how a particle can be in multiple states (and locations) at once before it is observed due to wave properties. However, I'm unsure...

Suppose we are in communication with aliens who live in a different universe. I know, that's impossible, communication requires the exchange of mass or energy, which implies that we live in the same universe. But suppose it is true. I am wondering, can we and the aliens, via this communication...

I would like to read historical documents where the chemist that succeded in synthetizing a new molecule explains the process he used to obtain his results. Does that exists? Instead of reading about solving the shrodinger equation in a square potential I would like to read how someone actually...

How can we explain our process of thinking by physics?

Hi! I'm working in a new area and I'm looking for inputs/suggestions for relevant factors to look into and possible ressource where I can read about this :) I did some tests in a pulley similar to the one below. I had a fixed weight at M2. I started with M1=M2 but added weights to M1 until...

Homework Statement "Explain combinatorially (not algebraically) why ##\binom n k=\binom n {n-k}##. In other words, explain why this is true using words, and not algebraic manipulations." Homework Equations ##\binom n k = \frac{n!}{k!(n-k)!}## The Attempt at a Solution "Suppose you have a set...

We have talked about light behaving as a wave and a particle. Having trouble understanding what 'mediated' means in this context.

Homework Statement From reliable information, once Baron Münchhausen was stuck in a swamp, he pulled himself out of it by the hair. What laws of physics did the baron break? (Find the answer analytically) Homework Equations None. The Attempt at a Solution Well, I think that he breaks the...

I am studying how to determine the nuclear charge radius from direct measurement of the Coulomb energy differences of nuclei. My book says that there is strong evidence which suggests that the nuclear force does not distinguish between protons and neutrons. Thus changing a proton into a...

Homework Statement Its in the title 2. Relevant equation aneuploidy? The Attempt at a Solution

Hi, I'm new to this thread. My brother tried to explain the Schrodinger's cat to me but the explanation was vague, I became confused. Can someone explain to me in high schooler language what it is and how it works? Thanks in advance.

##E = \frac{1}{2}(kx^2+m \dot{x}^2)## ## \frac{2E - kx^2}{m}=\dot{x}^2## ##\frac{dx}{dt} = \sqrt{\frac{2E - kx^2}{m}}## or ## dt = \sqrt{\frac{m}{2E - kx^2}}dx ## ⇒##= \frac{1}{\sqrt{\frac{2E - kx^2}{m}}}dx## My Question please help me. 1. I know ##T = 2\pi\sqrt{\frac{m}{k}} .## but i don't...

Inflation seems to explain why distantly separated parts of the universe are at the same temperature etc. But I've never seen any reason why the different parts should have been at different temperatures in the first place. Is there a simple answer to that?

I took this photo, which is of the flashlight on another phone, and I was just hoping someone could explain why it looks the way it does to me. (The pink circles, the blue half halo etc.) Just in case the uploaded image doesn't load for you, here is a direct link to the image...

The Kirchhoff law of dependence of energy emitted from a blackbody only on wave length and temperature was demonstrated by Kirchhoff in a paper in the year 1859. The paper is in german naturally but I found it translated in english in a book of prof. Brace in 1901. A lot of time ago. But my...

I just read an excerpt from Philip Ball's new book and was disappointed by its hyperbolic, boosterish tone. He adopts the pose that physicists have made great strides in understanding what happens during measurement. Wave functions decohere, etc. He concludes by saying something like "now...

hi, I’m trying to understand why in a rotor bearing system that the critical speeds of the rotor are higher for forward whirl, and lower for backward whirl. My general understanding is that forward and backward whirl frequencies diverge due to gyroscopic effects, and for forward whirl the...

Regge-theory succesfully explains the latest LHC ##pp## elastic scattering experimental results and total cross-sections: https://arxiv.org/pdf/1711.03288 https://arxiv.org/abs/1808.08580 Three different Regge-trajectories are needed: one Reggeon, one (soft) Pomeron and one Odderon. The...

The first three equations i was given is as follows: Vf = V0 + at Vf^2 = V0^2 + (1/2)at^2 x = V0*t + (1/2)at^2 [why do they sometimes use y instead of x or V0,y?] I don't understand in what situations i would use them in nor do i understand why you us V=gt or X=Vx*T. (i understand g can is...

Ok so she says that electric dipoles are of opposite charge but equal magnitude at 3:40. But then at 5:33 she shows 2Q with -Q, at that point the magnitude of the 2Q particle wouldn't be equal to the -Q so they wouldn't be electrical dipoles right?

Homework Statement H------S-----C Sandra is represented by S, Home is represented by H, and C is represented by commercial mall. If Sandra walks home, what is her displacement if the commercial mall is the origin? The distance between H and S is 2 miles and the distance between S and C is...

Why is there a tendency to use the concept of entropy to explain everything from relativity to quantum mechanics. Why people think this concept is so satisfactory?

Hello, this idea of holographic universe is mind boggling to me. If we are 2d and everything we see is actully 2d hologram, like picture on the monitor https://metro.co.uk/2017/01/30/our-entire-universe-is-an-illusion-and-reality-is-actually-a-2d-hologram-say-scientists-6415724/. There is...

Homework Statement For the solution to a given problem, in the second to last step I had: ##-\frac{\sqrt 6}{4} + \frac{\sqrt 2}{4}## I stated next that the solution was ##-\frac{\sqrt{6}+\sqrt{2}}{4}## I was told this was incorrect and that the correct solution is...