H d d (9%) Problem 1: Common static electricity involves charges in the range between nanocoulombs and microcoulombs. 50% Part (a) How many electrons are needed to form a charge of Q1=-3 nC? N=1.8751010 N=1.875 x 1010 Correct! 50% Part (b) How many electrons must be removed from a neutral object to leave a net charge of Q2 = 1.9 C? N=1.1875*1010| sin() cotan() atan) cosh() cos() asin() tan 7 8 9 HOME acos() E 4 5 9 acotan() sinh() tanh * 1 2 3 cotanh() 0 END