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1) Engine oil at 200 oC is forced over a 20-cm-square plate at a velocity of 1.2 m/s. The plate is heated to a uniform temperature of 60°C. Calculate the heat lost by the plate

2) Considering water at 30°C flowing over a flat plate 1 m × 1 m at 10°C with a free stream velocity of 0.3 m/s, plot the variation of hx along the length if heating starts from 0.3 m from the leading edge.

3) Air at 20 °C and 1 atm. flows over a flat plate at 35 m/s. The plate is 75 cm long and is maintained at 60°C. Assuming unit depth in the z direction, calculate the heat transfer from the plate.

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