Recent content by Sneaksuit

That's great guys! For some reason it won't let me see the gifs though...it says I don't have permission to access those pages.

Yeah, May 12 1975.

Ok, I know this is not too much of a teaser but maybe you guys could come up with something cool and original. I'm getting a tattoo and part of it has my birthdate in it. Except I don't want it to be obvious...I want some type of complicated equation with lots of mathmatical symbols etc so if...

So just switch my sin and cosin and that is another way of parametrizing S?

There is no specific starting point. Do you know of another way parametrizing S though?

If S is part of the plane z = y - 2 that lies inside the elliptic cylinder x^2 + 4y^2 = 4 and I want to parametrize S I will let x = 2sin(t) y = cos(t) z = cos(t) - 2 I assume this is right but let me know if not. My question is are there any other ways of parametizing S?

Well, we are working on Green's Theorem right now but i don't remember it incorporating the area of a rectangle. So, to answer your question...no, i don't even know where to begin.

Anyone know how to do this question? Let C be the boundary of any rectangular region in R2. Show that the value of the line integral \oint (x^2 y^3 -3y)dx + x^3 y^2 dy depends only on the area of the rectangle and not on its placement in R2.

Yes, I need the entire Frenet apparatus...tangent, normal, binormal, curvature, and torsion.

Ok, but then that gives me T(t) = \frac{(1 + sin(t))i + (cos(t))j + k} {\sqrt{2sin(t) + 3}} Now for T'(t) I don't ever remember taking derivatives of vectors this complicated. Do I use the quotient rule?

Thanx for the latex help. Now, do u see a problem with the math?

I need to calculate the Frenet apparatus for the space curve defined by \overrightarrow{r} (t) = \langle t - cos (t), sin(t), t \rangle so for T I did \overrightarrow{r} \prime (t) = \langle 1 + sin(t), cos(t), 1 \rangle then I got |r'(t)| = \sqrt{2sin(t) + 3 which I'm pretty sure...

If you drilled a hole exactly in the center of a container there would be no swirl no matter what the shape and size of the container as long as the top is open to the atmosphere. There is never a swirl in a seperatory funnel...the level of the liquid lowers evenly on a horizontal plane unless...

"Anyway, a stove puts out 10s of kilowatts of energy. The subsequent sound waves constitute maybe 1 milliwatt of energy. That's a ratio of over 10,000,000, so it's no use relating the two. " If there's no relation(indirectly or directly) then why would the ticking start when the stove is...

"The clicks you hear are the various pieces of the stove rubbing against each other as they expand. " Perhaps you might care to elaborate. What peices are you referring to? I suppose I should have asked the "physics" behind it. But I assumed since this was a physics forum I would have...