2. which of the following choices best describes an object's velocity? a. the bus traveled at 50 mph for 20 minutes. b. the airplane traveled southwest at 280 mph. c. the car went from 35 mph to 45 mph. d. the train made several stops, with an average rate of 57 mph.

Select the three ways that the parallel-plate capacitor differs from a car battery.

What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.

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.