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.

d: the voltage of the secondary coil is less than that of the primary coil.

im not suree sorry if wrong

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).