1 Suppose you ride a bicycle around the block, returning to your starting point.
At the end of your trip, your average velocity will be
Positive
Negative
Zero

moving ball hits still ball. mover stops, hit ball moves. momentum transfer.

v=ir = 3x15 =45 v

reserve is the 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.