Answer:
I think it would be a chemical change.
Explanation:
Because a physical would be like crushing it or something along that line.
The first choices are correct, because the second choices could happen by things other than light.
Answer:
Force / mass
Explanation:
Divide mass on both sides to get acceleration by itself leaving you with mass below force hence divide force by mass
With the advent of the plastic balloon and the beginning of the unmanned ... That would lead to a more sophisticated ballast system that uses fine steel or iron
