Consider the thermocouple and convection conditions of Example 5.1, but now allow for radiation exchange with the walls of a duct that encloses the gas stream. If the duct walls are at 400C and the emissivity of the thermocouple bead is 0.9, calculate the steady-state tem- perature of the junction. Also, determine the time for the junction temperature to increase from an initial condition of 25C to a temperature that is wit

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answer:

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explanation:

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0.025 seconds

Explanation: You just have to divide the time between the # of flaps divided by the 1.25 m/s