An unshielded thermocouple is used to measure the temperature of a stream of hot air. Assume the thermocouple surface is diffuse-gray, the emittance of the thermocouple is 0.8 and the area of the thermocouple is 0.1 mm2 . The convection heat transfer coefficient between the thermocouple and the hot air stream is 80 W/m2 K. The thermocouple radiates to the environment at 300 K, and there is no radiative exchange between the hot air stream and the thermocouple. If the reading of the thermocouple is 600 K, what is the temperature of the hot air stream (20 points)

the equation above shows how temperature f, measured in degrees fahrenheit, relates to a temperature c, measured in degrees celsius. based on the equation, which of the following must be true?

a temperature increase of 1 degree fahrenheit is equivalent to a temperature increase of

5

9

degree celsius.

a temperature increase of 1 degree celsius is equivalent to a temperature increase of 1.8 degrees fahrenheit.

a temperature increase of

5

9

degree fahrenheit is equivalent to a temperature increase of 1 degree celsius.

a) i only

b) ii only

c) iii only

d) i and ii only

answer:

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