Anew statue of the town founder is erected in the park. at the unveiling, the statue is a orange-brown copper. after a year, the statue looks blue-green. has a physical or chemical change taken place?

It is a chemical change. Oxidization (rusting) is what happened, and that is a chemical change. One famous example of that is the Statue of Liberty.

car stops. he keeps going = he has inertia

hello there!

your answer is a “generator”

a generator does not create energy but instead it transforms it.

it’s basically a motor working in reverse.