A railroad car having a mass of 13 Mg is coasting at 1.5 m/s on a horizontal track. At the same time, another car having a mass of 12 Mg is coasting at 0.75 m/s in the opposite direction. The cars meet and couple together. Find the difference between the total kinetic energy before and after coupling has occurred. Express your answer to three significant figures and include the appropriate units.

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