What is most often the basis for racist behavior in the united states?

Will you chech and finish these for me, because i am stumped with them.

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.)

Me with this and you will be marked brainliest