Recent content by xaer04

anybody?

Homework Statement Torricelli's Law of Fluid Flows How long does it take for water to drain through a 1cm diameter hole in the bottom of a conic tank (like a large funnel: 50cm tall, base radius is 30cm)? This problem has a few steps, some of them I'm not worried about at all...

Homework Statement "ASSIGNMENT 1 The Methane Molecule Introduction: The methane molecule CH4, composed of four hydrogen atoms and one carbon atom, is shaped liked a regular tetrahedron. The four hydrogen atoms are on the vertices and the carbon atom is at the center. What is the angle...

ah... thank you very much:)

[SOLVED] Electric Current Homework Statement "A power plant produces 1000 MW to supply a city 40km away. Current flows from the power plant on a single wire of resistance .050\Omega/km[/tex], through the city, and returns via the ground, assumed to have negligible resistance. At the power...

alright.. anyways, thanks a lot for the help.

ooh, and that means my ratio was backwards, which means... it works out, heh. but why do they use the ratio inside of a sphere where i have to use it outside of a rod?

ooh, thanks for spotting that, learningphysics...

that would be \pi r^2 L. i thought it would be that. where i get tripped up is in the example in the text, the same problem is done with a sphere using a ratio of the gaussian inner area and the area of the actual sphere: \frac{4}{3}\pi r^3 for the inside area \frac{4}{3}\pi R^3 for the...

Homework Statement "An infinitely long rod of radius R carries a uniform volume charge density \rho. Show that the electric field strengths outside and inside the rod are given, respectively, by E=\rho R^2/2\epsilon_0 r and E = \rho r/2\epsilon_0, where r is the distance from the rod axis."...

ah, i got it now... i didn't understand the concept of flux. thanks much, everyone:)

so... you're basically saying that shape doesn't matter and the answer is: 2\pi R^2 E and was ridiculously simple, and my real flaw is i was trying to overcomplicate? which i tend to do a lot... and as suggested, i still want to think it has to be more complicated than this since it's not an...

Homework Statement "What is the flux through the hemispherical open surface of radius R? The uniform field has magnitude E. Hint: Don't use a messy integral!" \mid \vec{E} \mid= E radius = R Homework Equations Electric Flux over a surface (in general) \Phi = \int \vec{E} \cdot \,dA...

Homework Statement "An electric quadrupole consists of two oppositely charged dipoles in close proximity. (a) Calculate the field of the quadrupole shown in the diagram for points to the right of x = a, and (b) show that for x>>a the quadrupole field falls off as \frac{1}{x^4}"...

Homework Statement "A thin rod carries a total charge Q distributed uniformly over its length, L. Use integration to show that the electric field strength a distance x along the rod's direction from either end of the rod is E=\frac{kQ}{\left[ x(x+L) \right]}."Homework Equations E = \int dE =...