Many automobile passengers have suffered neck injuries when struck by cars from behind. how does newton's law of inertia apply here?

Abar magnet cut in half will form a total ofpoles.a)fourb)eightc)two

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.

Debris produced by mining is called