Which statement about a flat magnet that can stick onto a refrigerator is true? -It has no poles.
-It has only a north pole, where Santa lives.
-It has only south poles.
-It has two poles.

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)

Petroleum contains energy. a. light b. kinetic c. chemical d. mechanical

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge