A 165 kg boulder is perched on the edge of a cliff that is 27 m high. If the boulder falls over the edge of the cliff, what will be its velocity just before it hits the ground at the base of the cliff?

Explanation is in the file

https://cutt.ly/kzjInUL

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.

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.