How fast would a 20 kg dog have to run, to reach a momentum of 120 kg x m/s? (Include unit in answer.)

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.

pretty sure it's false

prndulum needs thread, weight clock to time swings