At t=0 a grinding wheel has an angular velocity of 25.0 rad/s. It has a constant angular acceleration of 31.0 rad/s2 until a circuit breaker trips at time t = 1.80 s. From then on, it turns through an angle 432 rad as it coasts to a stop at constant angular acceleration.(a) Through what total angle did the wheel turn between t = 0 and the time it stopped? (b) At what time did it stop? (c) What was its acceleration as it slowed down?

Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.