It decreases because it gave its momentum to the other car.
Coefficients is your answer. I hope I helped:)
In the National Grid, the Step Up Transformer increases the amount of voltage that is passing through the grid at any one time. These are used at power stations, as without them, there would not be enough power to transport the electricity around the national grid.
Hope this helps :)
The answer is C. Elements
Elements cannot be broken down int simpler substances even by chemical means
