Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Finding Vol using double int- some messy domain

  1. Apr 15, 2008 #1
    [SOLVED] Finding Vol using double int- some messy domain

    1. The problem statement, all variables and given/known data

    http://img145.imageshack.us/img145/5963/63623863qj4.jpg [Broken]

    I think r should not go from 0 to 2*cos theta
    because it should go from that parabola like arc to the disk ..
    http://img90.imageshack.us/img90/199/35168880ck5.jpg [Broken] (the red line represent r)

    so, why they don't consider this?

    Second: I always worked with triples to find volumes, but here I guess I can't use it?
    Why they used x^2+y^2? **<nvm about this .. height*dA = V)**

    I ignored this example for the whole semester, and discovered all the mess in it today ><

    >>>>> Edit 2: They just said Area*height! <<<<<
    Couldn't find delete button
     
    Last edited by a moderator: May 3, 2017
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?