C . Record the time to complete a chemical reaction
Answer:
This is because normal force is exerted perpendicularly to the point of contact between the upper and lower objects.
Explanation:
This is because the upper object is still subject to gravitational pull. Therefore, the amount of force it exerts on the lower object due to gravity will be equal to the normal force that acts in the negative direction of gravitational force. Additionally, normal force is evident because the upper object will not go into the lower object.
I believe you are right. pH is the concentration of H+. Therefore the more acidic the more H+.
Over time, yes. It will over time gain more momentum
