Recent content by Cursed

Homework Statement Find \frac{V_o}{V_i} for http://img685.imageshack.us/img685/8658/nodevoltage.png Homework Equations s=σ+jω, where σ=real component & jω=imaginary component The Attempt at a Solution Solution is \frac{V_o}{V_i}=\frac{1}{s+2} Solution manual says...

It says to derive the Electric Gauss Law (1) from Generalized Ampere's Law (2). What is the appropriate way to apply Stokes' theorem? I'm confused. Thanks for both of your help, by the way. I greatly appreciate it.

Even if I use the divergence theorem and Stokes' Theorem, I get stuck: \nabla \times H = J + \frac{\partial D}{\partial t} \int\int_s (\nabla \times H) \cdot ds = \int\int_s J \cdot ds + \int\int_s \frac{\partial D}{\partial t} \cdot ds \oint_c H \cdot dl = \int\int_s J \cdot ds +...

Well, the problem asks for us to derive the equations as they are, but if integrals are necessary, I can try that. I just didn't know if I had to use integrals or not. How would I go about starting that? \nabla \times H = J + \frac{\partial D}{\partial t} \int H \cdot dl = I_f,s +...

Homework Statement Derive equation (1) from equation (2): (1) \nabla \cdot D = \rho_f (2) \nabla \times H = J + \frac{\partial D}{\partial t}Homework Equations [PLAIN]http://img198.imageshack.us/img198/4645/maxwell.png The Attempt at a Solution \nabla \times H = J + \frac{\partial...

yes, but what dose that have to do with finding the equivalent impedance? to find the equivalent impedance, you must combine the resistors in the phasor domain. I'm having difficulty doing that.

Homework Statement Find the input impedance Z. (i.e. Find Z equivalent.) Answer in the back of the book: Z=84.907-j20.12 ohms [PLAIN]http://img834.imageshack.us/img834/8508/circuit.png Homework Equations n/a ** j=sqrt(-1) The Attempt at a Solution I combined the 60-ohm, 50-ohm, and...

Homework Statement I just want to know why the tension in the rope in system A is not equal to 100 lbs, while the tension in the rope in system B IS 100 lbs. [PLAIN]http://img823.imageshack.us/img823/9462/conceptualquestion.png In system A, a 100-lb mass is hanging. In system B, there...

Homework Statement Find the Thevenin equivalent seen by RL in the figure below: [PLAIN]http://img708.imageshack.us/img708/7023/thevenineqi.png Homework Equations RL = Load resistor The double-headed arrows indicate that RL is the loadThe Attempt at a Solution I know how to find the Thevenin...

60 views and no answers? can someone help me with this?

Homework Statement Draw the free-body diagram of the structure by isolating it from its supports at A and E. Determine the reactions at A and E. [PLAIN]http://img715.imageshack.us/img715/7161/physics.png Homework Equations M = (Fy)*x, or M = (Fx)*y where "x" represents horizontal distance...

Homework Statement [PLAIN]http://img24.imageshack.us/img24/4168/circuitv.png Find vx and ix. Homework Equations Kirchhoff's Current Law: The algebraic sum of the currents entering a node is zero at any instant: Σi = i1 + i2 +... iN = 0 The Attempt at a Solution Since it's...

Yeah. I figured that's probably where I went wrong. I don't know how else to relate the two tensions. :S

Homework Statement A 1000 kg steel beam is supported by two ropes. What is the tension in each? Homework Equations F = ma = mg The Attempt at a Solution I labeled the left tension as T_{1} and the right tension as T_{2}. \sum{F_{y}} = T_{1,y} + T_{2,y} -mg = 0...

Homework Statement The work function of chromium metal is 7.2 x 10-19 J. What is the maximum speed an electron can be moving if it is ejected from chromium metal by light of wavelength 250 nm? (Answer: u= 4 x105 m/s) Homework Equations \Phi = h v_{0} KE = h v_{light} - \Phi =...