A. I looked it up and it should be somewhere around A
Chemical reaction produces new substances.
If you can identify substances you look for some differents befor and after. if find then sure there was chemical reaction.
Answer:
Va is two times greater than Vb
Explanation:
The maximum height reached by the balls are:

Since we are told that Ya = 4Yb:

Simplifying the equation:


Answer:
The average velocity from 5 to 6 seconds is -27 m/s
Choice A ... I = V/R ... is a correct form of Ohm's Law.