If the transistor is well insulated at all but its exposed, Mechanical Engineering

If the transistor is well insulated at all but its exposed

A circular transistor of 10-mm diameter is cooled by impingement of an air jet exiting a 2-mm-diameter round nozzle with a velocity of 20 m/s and a temperature of 15°C. The jet exit and the exposed surface of the transistor are separated by a distance of 10 mm.

If the transistor is well insulated at all but its exposed surface and the surface temperature is not to exceed 85°C, what is the transistor's maximum allowable operating power?

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Mechanical Engineering: If the transistor is well insulated at all but its exposed

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Mechanical Engineering: If the transistor is well insulated at all but its exposed

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