Recent content by Quiablo

Doesnt anyone here have any idea of what I am talking about, or my presentation is so badly written hat none has understood what I meant?

No, no, PV = nRT is used only for (ideal) gases, and we are talking about water, a liquid that is. Indeed, the fact that water boils at 100 degrees C and no other temperature, assuming one atmospheric pressure, has to do with the fact that any substance changes its state (solid to liquid or...

Actually if the water is boiling you can be sure what the temperature is, as it will be a function of the atmospheric pressure only. Assuming the experiment is performed at the sea level, the temperature of the boiling water shall be 100 C.

Instead of considering the voltmeter as an effective "open circuit" at the point of measurement, which is equivalent to an infinite parallel resistance, substitute it for (i.e. model it as) a finite resistance, say Rv.

Hi everyone, I am really stuck here, and I would really appreciate if someone could help me out. The statement of the problem is attached as a image. Some equations referred by the problem are also attached in another image. I will try to explain how I have reasoned using more words than...

Hey JavierR, thanks for answering. I am not sure if I understand what you say exactly, but I got kind of lost in your reasoning. First, in the second paragraph, I believe instead of meaning 3x3 matrix and 2x2 matrix, you probably mean rank 3 tensor and rank 2 tensor, respectively, because you...

I just wanted to mean that you will get, as a solution to the differential equation, a harmonic function of the form A cos(Bx), as you said it should be. You can right solutions of the exponential form also, complex exponentials, but that won't help you much in this case. The general...

First, considerer Newtons gravitation law: F = \frac{-GmM}{r^{2}}; where the minus sign indicates that the force is attractive. Now consider a body moving through the center of the Earth, at a distance r(t) from the center. Suppose that the Earth has constant mass density \rho. Tha total...

Homework Statement Problem 2, chapter 3 of Wald's General Relativity. The details don't matter much, but it is given a totally anti-symetric tensor field Eab such that EabEab=2(-1)^(s), s being the signature of the metric. I have checked a solution to the exercise, and somewhere during the...