Arigid wire is put into the shape of a square with side length l. the square has a mass m and carries a current i. the square lies on a horizontal surface(x-y plane) and there is a uniform magnetic field b that is in the +x direction. what is the minimum value of the magnetic field so that one edge of the square will lift off the surface

In what direction does an applied force move an object

The movement of electrons between atoms is called an

Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?