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*of positive charge, and a concentric shell from*

**a***to*

**a***of negative charge. The positive charge is equal to the negative charge. (non-conducting, uniform density)*

**b**Is there an outward pressure at

*a*of kqq/

*a*

^{2}/(4π

*a*

^{2}) - with pressure decreasing with radius, becoming P = 0 at

*b*.

Or, is there an attraction between the sphere and the shell --> P = 0 everywhere. The thickness of the shell does not matter. What if

*b*was infinity?

Thanks