A small sphere of mass 2.5 grams and charge 2.5 *10^-6 C is hung from a string of length 55 cm. When placed in a uniform electric field, the sphere moves so that the string makes an angle of 20 degrees with the vertical. A) Determine the tension in the string (Newtons). B) For the situation in part A determine is the magnitude of the electric field (N/C)?