A 45 kilogram mass is attached to a spring. If the frequency of simple harmonic motion is 2/π cycles/s, what is the spring constant k? k = N/m What is the frequency of simple harmonic motion if the original mass is replaced with an 180 kilogram mass? cycles/s

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