Question: Atmospheric air is in parallel flow ( u = 1 5 m / s , To = 1 5 deg C ) over a

Atmospheric air is in parallel flow (u =15 m/s, To =15\deg C) over a flat heater surface that is to be maintained at a temperature of 140\deg C. The heater surface area is 0.25 m^2, and the airflow is known to induce a drag force of 0.25 N on the heater. What is the electrical power needed to maintain the prescribed surface temperature?

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