Recent content by MarcMTL

Here's another one for you guys: I found my transformer ratio to be: np=1.44*ns So, 240Vrms/(1.44)=166.6Vrms on the secondary, which is correct as Vch = [ 2*Vst*sqrt(2) ]/2 gives us 150Vch, exactly as stated int he problem. So apparent power on the primary would be: Sp=Vpe*Ipe =...

The Electrician got it right. Since the load is 'highly inductive', one can assume that the ripple voltage is negligible and then your average & RMS value would be the same. In this problem the solution is attainable by assuming the RMS value is aprox. equal to the average.

Exactly. What I'm not able to find is the rms value of Ich, as it's an inductive load.

No, they are both average qtys.

Homework Statement A highly inductive load is subjected to 10A and 150V via a center-tap recitifier powered by a monophased 240V supply. See schematic below: Homework Equations I'm trying to calculate the apparent power at the primary and secondary windings. For the secondary: S=Vse*Ise...

Homework Statement A factory makes glass bottles, and 15.0% of the bottles are considered defective. A defective bottle will break 60.0% of the time when dropped from a controlled height, whereas a non-defective bottle will only break 10.0% of the time in the same conditions. You pick a single...

Homework Statement Sulfur dioxide reacts with the oxygen in humid air to produce sulfur trioxide. After the reaction, how many moles are left of: SO2, O2 and how many moles of SO3 were created?Homework Equations 2 SO2 + O2 --> 2 SO3 The Attempt at a Solution The limiting reactant is SO2, so...

Homework Statement Sulfur dioxide reacts with humid air to produce Sulfure trioxide. Find the chemical equilibirum. Homework Equations The Attempt at a Solution I wrote out that: SO2 + O2 + H2O(g) --> SO3 + H2O(g) And balanced, I obtain: 2 SO2 + O2 + 2 H2O(g) --> 2 SO3 +...

Homework Statement Calculate the molar percent of nitrogen in 1kg of Ni(NO2)2. Homework Equations mol% of A = n(A) / n(total) * 100 The Attempt at a Solution I'm stuck on this basic question. I have a tendency to say that the molar percent of nitrogen would basically be...

Homework Statement A 750N man raises a 200N bucket of water 30m up a helicoidal staircase. If we know that the staircase has a 10 meter radius and does exactly 4 complete turns in the 30m span, what was the total work done by the man against gravity? Also, in the same scenario, what is the...

Update: My problem was that I was using the center of the sphere as my origin for the coordinates. Using the coordinates measured from the real origin makes much more sense now.

Thank you very much Lynn. I believe I've grasped the concept here. I'll do a couple more to make sure it sinks in :). For my limits I obtain: \theta 0 to 2Pi \phi 0 to arccos(1/3) \rho 0 to sqrt(27)cos(\phi) Thanks again.

This is my maple graph of the problem:

LCKurtz, Yes, you're correct, it's the volume located above the cone and below the sphere. As for the \phi, how do I go abouts to finding the angle, or more specifically, the central angle of the cone? I know I can figure out the intersect between the both solids, but can't seem to deduce the...

Homework Statement Find the volume of the solid which is contained by 1) z= \frac{\sqrt{2}}{4}\sqrt{x^2+y^2} and 2) x^2+y^2+z^2= \sqrt{27}z Homework Equations I've completed the square on the 2nd equation to obtain x^2+y^2= 8z^2 and also the 1st equation to obtain...