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