The answer i think it is... is Temperature
Hope this helped!
The tractor trailer will push the car when they hit so therefore the car will have to greatest change
higher temp=faster motion
lower temp=slowed motion
Explanation:
Space exploration was aided most by the use of liquid fuel.
<em>Hope</em><em> </em><em>this helps</em><em>.</em><em>.</em><em> </em>
