The newton is defined as the: A. Force of gravity acting on a one kilogram object at Earth's surface.
B. Speed of an object when under the influence of Earth's gravitational field
C. Force that can give a 1-kilogram mass an acceleration of 1m/sec squared.
D. Mass of an object that is accelerated at rate 1m/sec squared.

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