Recent content by chrisy2012

The entire question is posted correctly.

But I am suppose to integrate over the arclength(ds). I'm suppose to parametrize the curve with respect to t so that the curve imoves along 1 unit of length per unit of time. That's how I got the bounds for the integral

Homework Statement Evaluate the line integral over the curve C \int_{C}^{}e^xdx where C is the arc of the curve x=y^3 from (-1,-1) to (1,1) Homework Equations \int_{C}^{}f(x,y)ds=\int_{a}^{b}f(x(t),y(t))\sqrt((\frac{dx}{dt})^2+(\frac{dy}{dt})^2)dt The Attempt at a Solution I tried...

Oh I got it, the professor explained that the 3 ohm resistor is on the side of a short, so the current would not reach there. Therefore it's 0.

oops i swear i had it when i posted it. anyways it should be there now

Homework Statement see thumbnail second part Homework Equations V=IR The Attempt at a Solution I remember the professor saying that current throughout a circuit is constant no matter where it is. So adding all of the resistance together it should be 12/10 or 6/5 Ampere's. Is this...

I had my physics midterm today and I totally blanked out. I want to know how to solve it for next time. So In the picture, there are two springs connected to the mass on a platform. a) if the platform is at rest, find the angular frequency the expression for angular frequency is...

Thanks for the reply guys, I asked the TA today and she says you have to divide it up into two identical triangles. so the answer would be ∫ 0 to ∏/4 of ( ∫ 0 to secθ (rdr))dθ which would equal to 1/2. But since there are two of the triangles the area would equate to 1. So it all works out :)

Homework Statement Find the area of a square with each side measuring 1 using double integral and change of euclidean coordinates to polar coordinate. Homework Equations x=rcosθ y=rsin0 dA=dxdy=rdrdθ The Attempt at a Solution int(int(rdr)dθ)

sorry my mistake, What i meant to say is that the domain is the xy plane except for at point (0,0). But still, how is that different from "domain of continuity"?

Homework Statement x*sin(sqrt(x^2+y^2))/sqrt(x^2+y^2) find the domain of continuity Homework Equations none The Attempt at a Solution I found the domain, which is x^2+y^2 > 0 and since x^2 >= 0 and y^2 >= 0 therefore the domain is (-inf,0) (0,inf) but the professor then asked...

oh got it, haha thanks, it was easier than i thought

you have to multiply by "Z" and use quadratic formula?

I already tried that, it did not work, you have to know the value of cos(x) in order to solve it that way

And Don't worry, it's not a take home test, it's one of the problems from mastering physics, I have already gotten the right answer but I want to know how to solve these kind of questions in case it comes up on the test.