A spherical shell is 20 cm thick, with an inner radius of 40 cm. If the charge density is given by 10.4 ×10-3 C/m3 :
a) Find the total charge Q and Explain why this value of Q is irrational (from a physical, not just mathematical, point of view)then find the electric flux density, at a distance of 1 m out from the center of the shell.