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The most efficient way to establish the best possible economizer position is to measure

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

Aroller coaster is traveling at 13 mi./s when you purchase a hill that is 400 m long and down the hill exonerate at 4.0 m/s squared what is the final velocity of the posterior found your answer to the nearest number