(Solved): Use Coulomb's law to determine the magnitude of the electric field at points A and B in (Figure 1) ...

Use Coulomb's law to determine the magnitude of the electric field at points A and B in (Figure 1) due to the two positive charges $(Q=4.5?\mathrm{C})$ shown. Suppose that $a=5.0\mathrm{cm}$. Determine the magnitude of the electric field at point $B$. Express your answer to two significant figures and include the appropriate units. X Incorrect; Try Again; 23 attempts remaining Part D Determine the angle between the direction of the electric field at point $B$ and the positive $x$-direction. Express your answer using two significant figures. Incorrect; Try Again; 22 attempts remaining