Which sample of copper has atoms with the lowest average kinetic energy?

10. g at 45°C
20. g at 35°C
30. g at 25°C
40. g at 15°C

2b2t

explanation:

2b2t

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 : )