Consider a 20-cm-diameter spherical ball at 800 K suspended in air as shown in the figure. Assuming the ball closely approximates a blackbody, determine (a) the total blackbody emissive power, (b) the total amount of radiation emitted by the ball in 5 min, (c) If the ball is actually having an average emissivity of 0.521, calculate the radiation heat transfer rate emitting from tho boll

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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Example 04
Consider a 20-cm-diameter spherical ball at 800 K
suspended in air as shown in the figure. Assuming the ball
closely approximates a blackbody, determine
(a) the total blackbody emissive power,
800 K
(b) the total amount of radiation emitted by the ball in 5 min,
(c) If the ball is actually having an average emissivity of
0.521, calculate the radiation heat transfer rate emitting
20 cm
Ball
from the ball.
Transcribed Image Text:Example 04 Consider a 20-cm-diameter spherical ball at 800 K suspended in air as shown in the figure. Assuming the ball closely approximates a blackbody, determine (a) the total blackbody emissive power, 800 K (b) the total amount of radiation emitted by the ball in 5 min, (c) If the ball is actually having an average emissivity of 0.521, calculate the radiation heat transfer rate emitting 20 cm Ball from the ball.
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