Recent content by thunderjolt

I, too, noticed that they summed to 90. Well, the entire problem, minus the EE info, is: I have an equation that makes an elipse: E = x[10cos(wt + 30°)] + y[30cos(wt)] We can make wt our variable. x and y are the vector directions, I believe. (they have hats ^ above them) gamma is...

Homework Statement I've solved a problem in my engineering homework to a point where I have the following data: ψ = arctan(3) = 71.57 (degrees) , inverse tangent of 3 δ = 30 degrees solve for gamma and chi (χ): tan(2gamma) = tan(2ψ)cos(δ) sin(2χ) = sin(2ψ)sin(δ) Homework Equations...

ok, that makes sense, the prof did the taylor series in class...thanks

Homework Statement I am in dif eq, but just need to know how to separate a power. separate e^(xi) into the form a-bi, where x is a constant (in my homework, x is 4pi/3, but that's not too relevant) i is the imaginary number sqrt(-1) Homework Equations I don't know if there is some simple...

It asks for Farads, and to put everything as XXX*10^Z. I have done so. I've used Mastering Physics all last year, so I know how to deal with the inputs. Is there some special integral or another equation that I could try? P.S. The way I'm doing the problem is exactly like the example in...

The other option also resulted in a wrong answer. 6.13*10^-11F using an area of (.16m)^2. I've 3 tries left.

That's the exact question word-for-word, so I can't tell either. The answer I got from doing the calculation was 3.83pF, which is wrong.

A parallel-plate air capacitor is made by using two plates 16 cm square, spaced 3.7 mm apart. It is connected to a 12-V battery. What is the capacitance? What is the charge on each plate? What is the electric field between the plates? What is the energy stored in the capacitor? What I...