rudolph9
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 Jul 28 comment Computing the Poynting vector? It ended up being $S_z = -\frac{ c}{ \mu_0}(B_x^2 + B_y^2)$, a negative, and I do not understand why? How does the cross product work out... What I am I interpreting incorrect in the following: $\vec E = [c B_x, cB_y, 0], \vec B = [B_x, B_y, 0]$ and $\vec E \times \vec B = i(c B_y \cdot 0 - 0 \cdot B_y) - j(c B_x \cdot 0 - 0 \cdot B_x) + k(c B_x \cdot B_y - B_x \cdot B_y) = 0$ ? Jul 28 comment Computing the Poynting vector? How do I approach computing $E$, at $x = 0, y = 0, z = 0, t = 0$, wouldn't $B = B_x + B_y$, hence $E = c(B_x + B_y)$? (using this value doesn't give me the correct result) Jul 22 comment Double internal energy, how much will the entropy change? Your answer definitely make way more sense! Jul 22 comment Double internal energy, how much will the entropy change? Also on the note of the $sigma$, the answer was given as $\sigma_{final} - \sigma_{initial} = 69.3$ Jul 22 comment Double internal energy, how much will the entropy change? Sorry, I have a bad tendency to see what I wanted to write rather than what I actually wrote (I went ahead and updated the other question) and I am not particularly framilar with conventions for greek letters in physics. Please leme know if other changes are needed. Jul 22 comment Double internal energy, how much will the entropy change? What do you mean by the "the way you rewrite the question, we have to look up the source anyway."? Jul 22 comment What is $k_B$ in the context of this question? Thank you for elaborating, this really puts things in perspective! Jul 7 comment Algorithmic approach for applying Kirchhoff's Rules to circuit analysis That type of programming is my specialty! I simply find the manor in which physics is generally presented very difficult to comprehend. To be able to look at concise piece of code would do a lot for my understanding of these problems. I'll take a look on the electrical engineering stack exchange. Feb 3 comment Exam review question on thermodynamics I get the feeling these types of questions are not welcome on this forum and I am wondering if there is a better forum to ask questions similar to this? Feb 3 comment Finding coefficients of volumetric expandtion from a know coefficient of linear expandtion Actually solving... since the volumes are initially equal $Spill_{glycerin} = \Delta V_{glycerin} - \Delta V_{aluminum} = \left( V_{glycerin} \beta_{glycerin} - V_{aluminum} \beta_{aluminum} \right) \Delta T$