The moon moves noticeable on the celestial sphere over the space of a single night. (a) to show this, calculate how long it takes the moon to move through an angle equal to its own angular diameter (½°) against the background of stars. give your answer in hours. (b) through what angle (in degrees) does the moon move during a 12-hour night.

It may seem strange that the selected velocity does not depend on either the mass or the charge of the particle. (for example, would the velocity of a neutral particle be selected by passage through this device? ) the explanation of this is that the mass and the charge control the resolution of the device--particles with the wrong velocity will be accelerated away from the straight line and will not pass through the exit slit. if the acceleration depends strongly on the velocity, then particles with just slightly wrong velocities will feel a substantial transverse acceleration and will not exit the selector. because the acc