If you mean climate change. Then scientists can study it by seeing where places and things are eroded.
Answer:
It conserves both energy and momentum in the collision at the same time. By design, when the balls collide the strings that hold them up are vertical (assuming balls are only swung from one side).
Explanation:
Hope This Helps!!
Average speed=total distance travelled/time
Answer:an open flame
Explanation:
Flammable materials like alcohol should never be dispensed or used near an open flame