If your mass is 100 kg on earth, what do you weigh on the moon?
a) 162 n
b) 100 kg
c) 981 n

Point charges q1 = 51 µc and q2 = −27 µc are placed 1.0 m apart, with q2 on the right. what is the force (in n) on a third charge q3 = 19 µc placed midway between q1 and q2? (assume the positive direction is to the right. indicate the direction with the sign of your answer.)