What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour?

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these

This is the number of complete movements of a wave per second.

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.