Recent content by luuurey

I can't agree with the opinion that kinetic energy of a particle of gas does not correspond to temperature. Each degree of freedom has energy kT/2. Mean kinetic energy of molecules (regardless of number of atoms) means 3 degrees of freedom. It means that the mean kinetics energy of molecules is...

This interpretation is a bit missleading. Microscopic kinetic energy(of molecul movements) corresponds with temperature rather then with heat. Heat doesn't equal temperature. Heat is simply energy that a system gains or gives up. Strictly speaking, heat is transfer of energy. Thus heat is...

Hello everyone, I've been wondering if I can calculate the apparent magnitude of The Moon since I know the apparent magnitude of The Sun(say -27mag) and reflection coefficient of Moon's surface(say 0.12). We know the equation \Delta m = -2.5 log_{10}(I/I_0) Where I is the flux of the...

There is a chapter in Feynman Lectures on Physics called The Random Walk(41-4). I understand everything till the paragraph right after equation 41.18. I have no idea what he is trying to say. There is an equation 41.19, which is diff. eq. for object that is forced and is in a environment that...

Got it. So you say it's all about practise, like in normal algebra, right?

I would get the same, wouldn't I ? One thing I'd like you to tell me. How do you know what subtitution you have to use?

Well a = \sqrt{a_g} \\ x = \sqrt{\alpha}v So I got \frac {\arctan({\sqrt{\frac{\alpha}{a_g}} v})}{\sqrt{a_g}} = t didn't I? So v = \frac {\tan(\sqrt{a_g}t)}{\sqrt{\frac{\alpha}{a_g}}} IS IT RIGHT ?

\int \frac{dx}{a^2 +x^2} x=a \tan \theta dx=\frac {a} {\cos^2 \theta} d \theta - is it like this ? so we get: \frac {1}{a^2}\int \frac{\frac{a}{\cos^2}d \theta}{1 +\tan^2 \theta} = \frac {1}{a}\int \frac{d\theta}{\cos^2\theta +\sin^2 \theta} = \frac{\theta}{a} = \frac {\arctan...

No, I haven't. I do not know how to substitute. The first one I can. The next two I cannot.

Can you show me please ?

Okay. Let's say n = 1. Then it should be resolvable. And what if n = 2 ? For n = 0 it is trivial...

Greetings everyone. Can you help me please with solving this differential equation? \large \frac{dv}{dt} = a_g + \alpha v^n where \Large a_g \alpha n are constants. Artelnatively with specific n as n = 1, 2. I have no idea what to do... Thank you very much

I'm asking you how we get the frist equation for a? Sorry, I cannot find out.

Ok. So how would you calculate the deformation of a pad if you put an cylinder on it. How would you calculate the distribution of normal force along the curvature?

I understand that it's sth. like calculating efective elastic modulus of two serial springs. \frac {1}{E} = \frac{1}{E_1} + \frac{1}{E_2} E is elastic modulus. It's because we can say it's like two springs. One is the object and second is the pad. And it is almost all I know about it. I...