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Consider cross flow of gas X over an object having a characteristic length of L=0.1 m. For a Reynolds number of , the average heat transfer coefficient is . The same object is then impregnated with liquid Y and subjected to the same flow conditions. Given the following thermophysical properties, what is the average convection mass transfer coefficient?
In 1896 in Waco, Texas, William George Crush, owner of the K-T (or "Katy") Railroad, parked two locomotives at opposite ends of a 6.4-km-long track, fired them up, tied their throttles open, and then allowed them to crash head-on at full speed in front of 30,000 spectators. Hundreds of people were hurt by flying debris; several were killed. Assuming that each locomotive weighed and its acceleration along the track was a constant , what was the total kinetic energy of the two locomotives just before the collision?