Recent content by Unto

Bump, I still don't know what constitutes the Dispersive Component of Surface Energy.

Can anyone tell me what the definition of Dispersive Component is?

Hello, I'm doing an MSc project concerned with the treatment of plastic polymers with an μ-APPJ. I have been getting a tonne of results on different plastics using an APPJ of He carrier gas with an Oxygen admixture of 1/2, 1 & 2%. However, in my analysis I'm unsure of what the dispersive...

Yeah but how do I show it? I know the particles can exit the cross-section through a solid angle Ω = 2π(1-cosθ), but ingrating over this angle gives me π/4nv. I think I am doing it completely wrong but I honestly don't know how to approach this problem any other way. Taking velocity...

Hello, It is a finite cylinder of let's say length vdt, with a cross-sectional area A of 1cm^2 The particle 'source' is a simple 3D gas with maxwellian velocity distribution (which I have already accounted for). The gas particles bounce elastically off of the walls until they exit through...

I check back every hour and my topic has 180 views but no replies from experts. Why?

I keep getting a factor of π/2 in my answer. So I end up getting π/4nv which is wrong. Surely someone on this forum knows how to do this? I can't find any helpful sources on the internet, yet everyone quotes it religiously when the subject of particle flux comes up.

I understand that about 1/2 the particles go in opposite directions, so for one end of the cylinder you already have 1/2nv.. But you have to take into account the angular distribution of particles with a velocity distribution [v, v + dv] coming out of the end. And this is where the solid angle...

Homework Statement Consider a cylindrical vessel with cross-sectional area 1m^2 Derive the particle flux (1/4n\bar{v})Homework Equations I have the solid angle: \Omega = 2π(1-cosθ) The Attempt at a Solution I'm assuming that the solid angle represents the full area that the particles can...

Simply have the 2 x 2 matrix of Sx operate on the state v, then multiply your new 2 x 2 matrix with the conjugate of v. And yes the conjugate of v is a transpose matrix with the i's all different.

Learn how to use Coulombs Law. That will give the exact result for the E field of a disk of charge.

Any ideas guys? It's the gaussian that's irritating me. How do I integrate it?

Homework Statement Use the variational method with a gaussian trial wavefunction ψ(x) = Ae^{\frac{-a^{2}x^{2}}{2}} to prove that in 1 dimension an attractive potential of the form shown, no matter how shallow, always has at least 1 bound state. *Figure is of a potential V(x) that has a minimum...

How do I integrate e^[(-1/2)x^2] dx from -∞ to ∞ ?

Do you still have it? I want to become a more active contributing member of this forum, but Latex is firmly staunching my progress :( Of course I will learn, I just don't understand why it needs to be so complicated and at certain times 'clunky' to use :(