Recent content by ziddy83

Equations Involving Vectorssss... hey guys...stuck on a homework problem here... very simple but...im not sure how to start... Here is the question: Find a vector equation and parametric equations for: The line through the point (1,0,6) and perpendicular to the plane x + 3y +z =5 can i...

I'm having a little trouble with the following problem. here it is... Determinte whether a_n is convergent for... a_n = \frac{2n}{3n+1} How would i go about solving this? Can i just simply take the limit and use L'Hospital's rule to see if it diverges or converges? Or is it a little...

Hey everyone...I need to find the volume of the following shape... y= \frac{1}{x}, y=0, x=1, x=3 rotated about y=-1 ok so, i drew out the shape, and for the radius i came up with: r= \frac{1}{x} + 1 I think that's correct...so assuming that my radius is right, then the...

oh ok...cool. Thanks guys

ok here is the integral...sorry for the laziness... integral of dt/(t^4)-25 would this just turn out to be (t^4)-25 since you can bring up the denominator to the top as (something)^-1...then just take the antiderivative...? hope that makes sense edit: ok that won't work...so I think i...

Anyone...?

hey everyone, I need some help solving the following problem. I am kind of confused on where to start. here is the question from the book. A carnot refrigerator is operated between two heat reservoirs at temperatures of 320K and 270K. a) If in each cycle the refrigerator receives 415J...

ok i got it ..thank you.

You have the basic concept down. I guess the most effective way to get good is to practice. I used to be horrible at integrals, but i have gotten much better, yet I am no expert...i practiced a lot. get familiar with all of the different techniques of integrals, like u substitution, trig sub, by...

Ok i have another problemo here... if F(x) = \int_{-x}^{x} \frac{dt}{1+t^2} Find F(1) and F'(1)...I need some assistance...the anti derivative is arctan(t) so then... do i set that equal to f(1) and solve for t? and then for F', take the derivative and then solve for t again? I...

ahhh..DUH! goshh...how did i NOT see that? Thanks man...haha...

Hey what's up..I need a little help with the following problem. If \int_{-\frac{\pi}{2}}^{M} \cos x dx= 1.5}, find M. How do I go about doing this? I know that...the anti derivative of cos is sin, and that \sin x \right]_{-\frac{pi}{2}}^{M} = 1.5 Any help would be greatly appreciated...

Can Anyone help? Thats all that was given in the question...

hey what's up guys, I need some help solving a homework problem for physics... here is the question. A gasonline engine has a power output of 180 kW (241hp). Its thermal efficiency is 28%. a) How much heat must be supplied to the engine per second? b) How much heat is discarded by the...

Ok, here is the integral i seem to be having some issues with. I know there's a very simple step I am missing. \int_{}^{} e^x \sin(\pi x) dx i attempted to do this using by parts integration. I tried u = \sin(\pi x) so du= \pi \cos(\pi x) dx so then dv= e^x dx and v= e^x...