1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: Hemisphere Centre

  1. Apr 13, 2009 #1
    imagine a hemisphere of radius a with the circle lying in the x-y plane and so the axis of the hemisphere is the z axis. if z=0 is at the centre of our circle, what value of z corresponds to the centre of the hemisphere?

    i used z=a/2 but have a sneaky feeling its' meant to be [itex]\frac{a}{\sqrt{2}}[/itex]

    can anyone help?
  2. jcsd
  3. Apr 14, 2009 #2
    Do you want the CENTER OF MASS?

    Are you looking at the top half of a solid sphere centered at the origin with radius a?
  4. Apr 14, 2009 #3
    i dont want the centre of mass. yes your talking about the right shape.

    basically i have an expression for the electric field on the z axis as the hemispherical surface is charged and it asks me to find the value of the electric field at the centre of the hemisphere - what z value should i use?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Similar Threads for Hemisphere Centre
How to find the volume of a hemisphere on top of a cone