A gas consists of 1024 molecules, each with mass 3 × 10-26 kg. It is heated to a temperature of 300 K, while the volume is held constant. 1) If the gas is confined to a vertical tube 7 × 103 m high, what is the ratio of the pressure at the top to the pressure at the bottom?

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