Explanation:
The substance that is in excess that doesn't get used up as a reactant is called limiting reactant.
Yea I think the light is to fast
The correct letter to your answer would be A
Answer: A mechanical wave is a disturbance in matter that transfers energy through the matter. A mechanical wave starts when matter is disturbed. A source of energy is needed to disturb matter and start a mechanical wave.
I think it's calorie
Hope this helps