If a Space Heater Consisted of a 10 $^{\circ}$ C? Assume the Ball Is a Perfect Blackbody

question 77

Multiple Choice

If a space heater consisted of a 10.0 cm radius iron ball through which electrical current was passed in order to heat the ball,what temperature would it need to be raised to in order to radiate 500 W into the surrounding air (which is at a temperature of 20 $^{\circ}$ C? Assume the ball is a perfect blackbody.

• A) 510 K
• B) 346 K
• C) 730 K
• D) 530 K

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