Who knows who this who

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?

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.)

Specific heat refers to the amount of heat required to change 1 gram of a substance by degree(s) celsius