Consider a system to be two train cars traveling toward each other. What is the total momentum of the system before the train cars collide?

1= 26.17

2= 1.17

3=30.86

4=5.86

just took the assigment on edge

in most common fires, oxygen is needed for an oxidation reaction to takes place. the combination of oxygen with any element as fuel can create fire and combustion will occur especially if wood, light materials and other combustible things are combine with oxygen.