Two equal-mass balls with speeds 10 m/s and 8 m/s collide head-on, as shown, and bounce off each other along the original line of motion. The speeds of the balls after the collision could possibly be (not necessarily in the same order)

The answer is B, I took that test and nailed it.

this means that the temperature of both substances will be equal

well, you would divide 135 by 33 to get your answer. then that is how many seconds it would take. boardman should fly about 132 m or 4.090909090909091 seconds.