Recent content by Oblakastouf

Let V_B be the rate of decrease of the magnetic fields \frac{dB}{dt} For the 3rd path: \oint E\cdot ds = -\frac{d\phi _B}{dt} = -\frac{{d\phi _B}_1 + {d\phi _B}_2}{dt} \phi _B_{(t)} = A_{(t)}B_{(t)} The area is constant, it's only the magnetic field that's changing: \phi _B_{(t)} =...

Bump again...

Alright... What are the rules for when the numerator (Top part) of the fraction has a higher degree than the lower part of the fraction. Something + {*} ... As in what is that SOMETHING based on the numbers? I have a midterm in like... 50 minutes and this is the only thing I need to know.

Homework Statement http://i.imgur.com/ks0WZ.png Homework Equations A lot of them. The Attempt at a Solution I've got all the right answers up until part four, where you have to solve for C. -5000 is incorrect. I need help setting up to solve C! Please ^_^.

Gawd... That was a f--king ordeal... Thanks though lol.

integral xsin^2(5x) + integral x Integral x/2 + Integral xcos(10x)/2 + integral x right?

Yeah see, we were never taught what the heck perfect squares are in high school... Basically we were told to use the quadratic equation for everything. We never even learned cubes...

Here's the integral: 2*pi*y*sqrt(1+(sin(5x)*sqrt(3-cos(5x)^2))^2) I just don't see an EASY method to evaluate it... All of the method's I've tried end up in just a more and more complicated integral...

I can never see the algebra that they try to make "Clever". It annoys the hell out of me that they need to make it "Clever" instead of letting us do it the sec^3(x) method... That's easy as hell in comparison to this complex algebra that I never learned because my high school teachers couldn't...

Homework Statement Homework Equations integral [a, b] 2*pi*x*sqrt(1 + (dy/dx)^2) The Attempt at a Solution Well I know how to do surface area questions... But that the @#$@ is with this random equation? How would I even start to evaluate it... Like honestly... I don't even understand the...

I am, but I'm in a class that doesn't use them yet lol.

Right... My mistake, but I'm also having trouble with integration, and that isn't my strong suit, how would I integrate that?

Homework Statement http://i47.tinypic.com/1z6naa.jpg Note... I used wolfram alpha to get the answer, I did not get it myself... So I still need help. The answer shown is correct, so you'll know if you got it. Homework Equations Integral [0, ln(4)] sqrt(1+(dy/dx)^2) The Attempt at...

Hint #2: Chain rule: f(g(x)) = f'(g(x))g'(x) In this case... f(g(x)) = g(x)^-2 Soooo...

Homework Statement http://i47.tinypic.com/1z6naa.jpg Note... I used wolfram alpha to get the answer, I did not get it myself... So I still need help. The answer shown is correct, so you'll know if you got it. Homework Equations Integral [0, ln(4)] sqrt(1+(dy/dx)^2) The Attempt at a...