(Solved): A hollow metal sphere has 5cm and 11cm inner and outer radii, respectively, with a point char ...

A hollow metal sphere has $5\mathrm{cm}$ and $11\mathrm{cm}$ inner and outer radii, respectively, with a point charge at its center. The surface charge density on the inside surface is $?100\mathrm{nC}/{\mathrm{m}}^2$. The surface What is the strength of the electric field at point $4\mathrm{cm}$ from the center? charge density on the exterior surface is $+100\mathrm{nC}/{\mathrm{m}}^2$. Express your answer to three significant figures and include the appropriate units. What is the strength of the electric field at point $8\mathrm{cm}$ from the center? Express your answer as an integer and include the appropriate units. What is the strength of the electric field at point $12\mathrm{cm}$ from the center? Express your answer to three significant figures and include the appropriate units.