Why does a feather fall slower than a rubber ball? How could you make them hit the ground at the same time?

Galileo discovered that objects that are more dense, or have more mass, fall at a faster rate than less dense objects, due to this air resistance. A feather and a rubber ball dropped together. Air resistance causes the feather to fall more slowly, while the ball falls more fast.

Explanation:

A hydrogen ion is called a proton because hydrogen ions lose their one electron and are only composed of one proton.