Apositive point charge (q = +8.65 x 10-8 c) is surrounded by an equipotential surface a, which has a radius of ra = 2.97 m. a positive test charge (q0 = +4.56 x 10-11 c) moves from surface a to another equipotential surface b, which has a radius rb. the work done by the electric force as the test charge moves from surface a to surface b is wab = -6.95 x 10-9 j. find rb.

Three archers each fire four arrows at a target. joe’s four arrows hit at points 10 cm above, 10 cm below, 10 cm to the left, and 10 cm to the right of the center of the target. all four of moe’s arrows hit within 1 cm of a point 20 cm from the center, and flo’s four arrows hit within 1 cm of the center. the contest judge says that one of the archers is precise but not accurate, another archer is accurate but not precise, and the third archer is both accurate and precise. which description applies to which archer? explain

Which transition by an electron will release the greatest amount of energy? oa ob oc od

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?