Homework Statement
Water flows down a channel whose floor is porous, so that water seeps out of the bottom of the channel at a speed v, where v is constant and much less than the flow speed, U, along the surface of the channel. The seepage rate is slow so that H may be regarded as constant...
Homework Statement
A) A tank of water of cross-sectional area A empties through a pipe
of cross-sectional area a, where a A so that the speed of the water flow in the tank can be neglected compared to that in the pipe. The initial height of the water in the tank is H and the pipe extends a...
OK, by integration I've found the charge enclosed by the sphere to be (4pi*k*r^5)/5, but I'm not really sure where to go from here?
From
\oint _S \vec{E} \cdot \vec{dA} = \frac{Q_{enclosed}}{\epsilon_0}
I can see that I need to divide the charge enclosed by epsilon 0 then equate to the...
Homework Statement
Compute the electric field generated by a spherically symmetric charged sphere of radius R with charge density of \rho = kr^{2}
Homework Equations
\oint _S \vec{E} \cdot \vec{dA} = \frac{Q_{enclosed}}{\epsilon_0}
The Attempt at a Solution
I know that this question...