Answer:
Explanation:
the repeating rifle, submarine, railroad, telegraph/morse code, ironclad, battlefield medicine, minie ball ammunition
I believe the answer is D. Hope this helps ;D
If I would have to make a good guess, I would choose A.
Physical change only change the appearances of a substance, not it’s chemical composition. Chemical changes cause an entirely new substance with new chemical formula.
Some balls will drop slower than others.
