You are performing an experiment that requires the highest possible energy density in the interior of a very long solenoid. which of the following increases the energy density? (select all that apply.) increasing only the length of the solenold while keeping the turns per unit lengh flxed increasing the number of turns per unit length on the solenold increasing the cross-sectional area of the solenoid none of these increasing the current in the solenoid

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