3) Convection can only happen in what? *

Convection can only happen with liquids and gases.

Hope it helps :)

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 : )