Consider an air wedge that has distance between glass sheets of 0.70mm and a light that has a wavelength of 700nm shines on the glass plates. If we consider interference only between Rays 1 & 2 (as above) would we observe constructive or destructive interference (or neither)? How do you know?

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?

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?