[填空题]
A solid metal sphere of radius 3. rg)f9 xh 5yz-3b)kyi y7(wmnp00 m carriesx8lvmc1 hxp0n 7h ,4a mvw:ng9 a total charge of $-3.5\mu C$ What is the magnitude of the electric field at a distance from the sphere’s center of
(a) 0.15 m,
(b) 2.90 m,
(c) 3.10 m, N/C
(d) 6.00 m? N/C
(e) How would the answers differ if the sphere were a thin shell?