Mass is the measure of inertia. what does it mean?

Mass is a measure of inertia as measured in an inertial frame, i.e., the frame in which an object free of the influence of external forces continues to move at a constant velocity. In the presence of gravity, the inertial frame is really the freely falling frame.

Explanation:

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.

false.

explanation:

this statement is false. after falling for 5 seconds, its speed will not be 100 m/s.