• Support PF! Buy your school textbooks, materials and every day products Here!

Hemisphere Centre

  • #1
1,444
0
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?
 

Answers and Replies

  • #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?
 
  • #3
1,444
0
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?
 

Related Threads for: Hemisphere Centre

Replies
0
Views
20K
Replies
5
Views
10K
  • Last Post
Replies
1
Views
770
  • Last Post
Replies
1
Views
842
  • Last Post
Replies
8
Views
5K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
1
Views
4K
  • Last Post
Replies
12
Views
5K
Top