Question $8$

$1/10$ points

At a distance of $0\mathrm{.}200$ cm from the center of a charged conducting sphere with radius $0\mathrm{.}100$ cm $,$ the electric field is $480.$ N$/$C$.$ What is the electric field $0\mathrm{.}400$ cm from the center of the sphere?

Answer:

$4\mathrm{.}77{10}^6\frac{N}{C}$

Question $9$

$\frac{1}{10}$ points

$$

Two very large, nonconducting plastic sheets, each $10\mathrm{.}0$ cm thick, carry uniform charge densities ${}_1,{}_2,{}_3,$ and ${}_4$ on their surfaces as shown in the figure above. These surface charge densities have the values ${}_1=+4\mathrm{.}00\frac{C}{m^2},{}_2=+2\mathrm{.}00\frac{C}{m^2},{}_3=-4\mathrm{.}00\frac{C}{m^2},$ and ${}_4=+6\mathrm{.}00\frac{C}{m^2}.$ Use Gauss's law to find the magnitude of the electric field at point $A,5\mathrm{.}00cm$ from the center of the left face of the left$-$hand sheet.

Answer:

$2\mathrm{.}83{10}^5\frac{N}{C}$

Can you help me with both questions please?