6. A spherical mass of 5.0 g is hanging from a thread that is positioned between two plates that are a distance of 20.0 cm apart. The sphere has a charge of 6.2 uC and is deflected by an angle of 0 from the vertical as is evidenced in the figure below. What would the potential difference between the plates need to b for the angle of deflection to be 30" (i.e. 0 = 30')? Note that the sphere has mass and is accordingly acted on by gravity so there will be a gravitational force present