1. You are asked to build some models of methane molecules for a science fair. You will arrange your
model atoms as shown on
the right, but you will
use ping-pong balls and tennis balls to model
hydrogen atoms and carbon atoms. If
you
have 12
ping-pong balls, how many tennis balls will you
need? Use the model you just developed to justify
your answer.

Science

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