Calculate the vector potential and from it the B-field of a steady current I running on a circular loop of radius R situated in the x-y plane. Comparing with the B-field we calculated with B-S law in class, what do you conclude about evaluating the integral?

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat

Which of these is the best way to manage a natural resource