1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Volume method, having trouble picturing

  1. Oct 7, 2007 #1
    So I know it is the "washer" method...but because the book says it is.

    The region enclosed by [tex]x=y^2[/tex] and [tex]x=y+1[/tex] revolved around the y-axis.

    Now I think I see it , but is it a "hollow" washer because my bounds y=-1 and y=2 (where the curves intersect) are not ON the axis, thus my coss sections are not disks....

    that is to say "the region between the points of intersection and the y axis does not get "swept out" during the revolution"...

    I know this is tricky without a diagram,
    thanks,
    Casey
     
  2. jcsd
  3. Oct 7, 2007 #2
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?