A charge of 5.50 x 10-9 C and a charge of -3.00 x 10-9 C are separated by a distance of 60.0 cm. Find the position at which a third charge, of 10.0 x 10-9 C, can be placed so that the net electrostatic force on it is zero. ____ m (beyond the -3.00 x 10-9 C charge)
An object with a net charge of 14 µC is placed in a uniform electric field of 710 N/C, directed vertically. What is the mass of the object if it "floats" in the electric field? ______ kg