Heat, gas production, and color change can all be evidence of chemical change. true or false

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

hope this : )

that's what i got you can count the number of atoms