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55C methanol flows over a 4m long 2m width flat plate with temperature of 25 C. The velocity of methanol is 1.08 km/h. Determine

55C methanol flows over a 4m long 2m width flat plate with temperature of 25 C. The velocity of methanol is 1.08 km/h. Determine the total drag force and the rate of heat transfer from the entire plate. What is the value of x_ and what does it mean?

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