Recent content by jheld

Yeah. I assume number 4 is in the manual, fortunately. Number 6 should be similar. So, I suppose help on 5 and 7 (despite the incorrect numbering in the hw) would be much appreciated!

Hey, if you're talking about Minden, then I am in your class. I agree that there aren't many resources to try and solve this problem. I'm assuming we have to use D-Flip Flops--and probably four of them, the first outputs to 100MHz, and another line runs to a second which outputs at 50MHz, etc...

yeah, which is what i did originally. from there i thought about reparametrizing the function in cylindrical coordinates, where z = 0. x = 2cos(t), y = 2sin(t), 0<=t<=2pi. but you're saying that if I do the aformented -5f_x, -2f_y, -1 da, that will work as well? seems rather simple :)

okay...but what about F(x,y,f(x,y))dot(-f_x,-f_y,k)?

Well, I plugged in everything and made the dot product... Here is what I came up with (thus a little stuck again): (2xy(4-x^2-y^2)^(-1/2)-1-2xy+xy(4-x^2-y^2)^(-1/2)-2y^3+y^3(4-x^2-y^2)^(-1/2)+3y-3x)dxdy I was thinking of making u = 4-x^2-y^2, but that doesn't totally solve my problem.

oh, ok. yeah, I've tried with the parametrization, and it doesn't seem that I can solve it by myself.

alright, understandable. I saw that equation earlier, but didn't think I needed it. In this case z = sqrt(4-x^2-y^2), but are x and y just as they are... for F(x,y,f(x,y))? or should I parametrize x,y and z?

just did. sry bounds are x^2 + y^2 + z^2 = 4 and z<= 0, just a typo.

Oh ok. Yeah, I probably didn't press the shift key. Do you know where I should go from here?

Yeah, that's been confusing me lately. I took elem. linear algebra, so I know how to calculate a determinant, so this is kind of ridiculous. I'll post my curl... curl F = [d/dy(4y-3x)-d/dz(x+y^2-z)]i - [d/dx(4y-3x)-d/dz(2y-z)]j + [d/dx(x+y^2 -z)-d/dy(2y-z)]k. And from there I got = [4-(-1)]i...

Homework Statement verify Stokes's theorem for the given surface and vector field. S is defined by x^2 + y^2 + z^2 = 4, z <= 4, oriented by downward normal; F = (2y-z, x + y^2 - z, 4y - 3x) Homework Equations double integral over S of the curl F ds = integral over S' of F ds...

Okay, so far I understand. And, just to clarify, I wasn't using f_x and f_y notation for the hell of it, I was just making f the general equation. But, I understand the x - 2 and y -4 in conjunction with the two equations given. So, I have taken the first (and second order) derivatives of...

Yeah, it is phrased weird. I'll rewrite the entire problem statement just to be sure: The Java Joint Gourmet Coffee House sells top-of-the-line Arabian Mocha and Hawaiian Kona beans. If Mocha beans are priced at x dollars per pound and Kona beans at y dollars per pound, then market research...

Homework Statement Show that the two lines: L1: x = t - 3; y = 1 - 2t; z = 2t + 5.. L2: x = 4 - 2s; y = 4s + 3; z = 6 - 4s... (I changed the t's to s's for L2) are parallel, and find an equation for the plane that contains them. Homework Equations A(x - x0) + B(y - y0) + C(z - z0) =...

Homework Statement Mocha beans are priced at X dollars per pound, and Kona beans at y dollars per pound. 80 - 100x + 40y pounds of Mocha beans sold each week 20 + 60x -35y Kona beans sold each week. Cost of the beans is $2 per lbs of Mocha and $4 of Kona beans to the owners. How should the...