Te emissivity of non-polished gold is about 047 suppose a

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The emissivity of non-polished gold is about 0.47. Suppose a non-polished solid golden sphere has a radius of 0.2 m and is at a temperature of 158^oF. If this sphere is placed in a room in which the temperature is 68^oF, determine the rate in which heat is leaving the sphere (due to radiation) into the room.

(a) 56.8 W

(b) 66.8 W

(d) 86.8 W

(e) 96.8 W

(f) None of the above.

Reference no: EM13619508

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