Which of the following best describes the magnetic field lines around an isolated, permanent bar magnet? a. the field lines go from the magnet's south pole into its north pole. b. the field points out along radial lines from the bar magnet, extending straight out to infinity. c. the field lines go from the magnet's north pole into its south pole. d. the field points straight into the bar magnet along radial lines that extend to infinity.

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.

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?

A1000-kg car is moving at 30 m/s around a horizontal unbanked curve whose diameter is 0.20 km. what is the magnitude of the friction force required to keep the car from sliding?