It's a chemical chemical change
the answer is c because it is the 3rd step in the scientific analysis steps
b) 4m/s/s
This is because you divide the speed you reach, by the time it takes to get to that speed:
12m/s ÷ 3s = 4m/s/s
The units come from what you divide, meters per second ÷ seconds this can be written as m/s/s or ms-²
Values in physics that do not affect each other are considered Independent values
