A negative charge is placed between a pair of oppositely charged plates, as shown. Which best describes the result of moving the charge to the point marked X?

A. Its electric potential energy increases because it has the same electric field.
B. Its electric potential energy increases because the electric field increases.
C. Its electric potential energy stays the same because the electric field increases.
D. Its electric potential energy stays the same because it has the same electric potential.

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.

Debris produced by mining is called