A 2.00 g air-inflated balloon is given an excess negative charge. q = -3.75 x 10 C, by rubbing it with a blanket. It is found that a charged rod can be held above the balloon at a distance of d= 7.00 cm to make the balloon float. Assume the balloon and rod to be point charges. The Coulomb force constant is 1/(4xco) = 8.99 x 10 N-m/C and the acceleration due to gravity is 8 = 9.81 m/s. In order for this to occur, what polarity of charge must the rod possess? 92 is neutral O2 is positive O is negative 92 92 is a proton How much charge q2 does the rod have? 92= C