Recent content by Ne0

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That looks like one of the designs I had to do in my engineering courses as an undergrad. What school do you go to?

Have you done circuits in the s-domain? That would make this problem much easier to solve for. It would become a simple two-mesh problem in which you could use Cramer's rule to solve for with the constraint equation for the dependant source. And I am pretty sure it is not going to be a second...

Can anyone help please with what I am doing wrong in the Fourier expansion?

If you guys are stuck the answer in the book is: {y} = {c}_{1}\cos\omega{t} + {c}_{2}\sin\omega{t} + {A}(\omega)\cos\omega{t} {A}(\omega) = \frac{1}{\omega^2 - 1} {\leq} 0 if \omega^2 {\leq} 1 {A}(\omega) = \frac{1}{\omega^2 - 1} {\geq} 0 if \omega^2 {\geq} 1 Since there was not...

I swear this latex thing I can't figure it out.

Ok we are given the ODE {y}^{\prime\prime}(t) + \omega^2{y(t)} = {r(t)} r(t) = cos\omega{t} \omega = 0.5,0.8,1.1,1.5,5.0,10.0 I know you can use variation of paramaters to solve for it so I start by finding the complementary solution. {y}^{\prime\prime}(t) + \omega^2{y(t)} = 0...

Question: Beam AB is subject to a uniform load of 300N/m and is supported at B by column BC. If the static coefficients of friction at B and C are (muB) = .2 and (muc) = .5, determine the force P needed to pull the column BC out from under the beam if P is .25m away from C and .75m away from B...

I was thinking like one point on an isothem to be (V1,P1) and another point (V2,P2) and the slope would be, P=nrt/V, (nRT/V2-nrt/V1)/(V2-V1). I am not quite sure what to do with this result because we need to somehow show from the other isothem that they are identical and therefore will never...

Yes we are trying to prove using the ideal gas law that the two isotherm lines never intersect just like Gbert mentioned. I was thinking of maybe differentiating for PV=nRT and somehow show that the two isotherms have the same slope.

Dealing with isothermal lines. How would you go about proving if the two lines are parallel if no values are given for the Pressure or the Volume? This is what I've got so far: Q = -W dU = 0, where U is internal energy. P1V1 = nRT P2V2 = nRT P1V1=P2V2 Or: P1/P2 = nRT1 / nRT2...

All physics problems come from the Resnick and Halliday Physics text 5th edition, volume 1, Chapter 21-22. E21-25: Density is mass divided by volume. If the volume V is temperature dependant, so is the density (row). Show that the change in density (delta row) with change in temperature...