Two technicians were discussing the problems that are likely to occur if the brake hydraulic system is not air free. technician a stated that the brakes will not operate correctly if the brake hydraulic system is not air free. technician b stated that the driver will feel a spongy brake pedal that is often lower than normal if the brake hydraulic system is not air free. which technician is correct?

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.