Figure \( 23-42 \) gives the magnitude of the electric field inside and outside a sphere with a ...

Figure \( 23-42 \) gives the magnitude of the electric field inside and outside a sphere with a positive charge distributed uniformly throughout its volume. The scale of the vertical axis is set by \( E_{s}=10 \times 10^{7} \mathrm{~N} / \mathrm{C} \). (a) What is the charge on the sphere? (b) What is the field magnitude at \( r=8.0 \mathrm{~m} ? \)
Figure 23-42 Problem 6.