Two very small spheres, each with a mass m = 1.5 g, are suspended from a common axis by insulating threads of length L= 6.0 cm. When each sphere has an identical charge q, the threads each make an angle of 15° from vertical. Assume the radius of each sphere is negligible compared to L.
a.) What is the magnitude of the unknown charge q?
b.) If the charges were changed to ½q and 2q on the right and left, respectively, what would the corresponding angles from vertical be?