Recent content by m453438

  1. M

    Casual Function? (Electrical Engr)

    Thank You cepheled.
  2. M

    Casual Function? (Electrical Engr)

    Causal Function? (Electrical Engr) Homework Statement I have the following function: d^2 y(t)/dt^2 + 3* dy(t)/dt + y(t) = dx(t)/dt +2x(t+1) Where y(t) is the output and x(t) is the input. I need to determine if it is causal or non causal. Homework Equations See above. The...
  3. M

    Engineering Finding impedance in an ideal transformer circuit

    I haven't tried solving yet, but the correct answer according to my instructor should be 210 - j2700 ohms. And thank you everyone for helping me out.
  4. M

    Engineering Finding impedance in an ideal transformer circuit

    Thank You!, I would never thought of that...
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    Engineering Finding impedance in an ideal transformer circuit

    Homework Statement This is a review question for my test, but I can't get the right answer, the problem is to find the impedance ab. Homework Equations Zin = 1/a^2 * ZL The Attempt at a Solution The 10 ohm resistor and the capacitor are in parallel and then add the 50 ohm resistor...
  6. M

    Surface integral from vector calculus

    Homework Statement F = (x^2) i + (y^2) j + (z) k, S is the cone z = (x^2+y^2) ^ (1/2), with x^2 +y^2 <= 1, x >= 0, y >= 0, oriented upward. Homework Equations All of the above The Attempt at a Solution My attempted solution is 0. But other students claim that the answers is...