A 200 kg boulder is 1000 m above the ground (c) The
boulder begins to fall. What is the its potential energy when it is 500-m
above the ground? Where did the lost potential energy go? *

answer; equivalent to a one(1) horsepower motor;

d) physical means can be used to separate the components of air.

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.