A baseball bat his a baseball with a force of 100 Newtons. What is the force and its direction exerted by the ball on the bat?

I think it's "100 Newtons in the opposite direction of Net Force Motion".

increase masses, decrease separation

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.