A sphere (emissivity=0.42) of radius 25 cm is at 27 deg C. It's placed in a room with a temperature of 2 deg C.Match each item to a choice:How long will it take for the sphere to lose 1x10^6Joules of energy?What is the rate of heat energy entering the sphere?Choices:: 151.4981 W: 8.236 hrs: 6.832 hrs: 44.5303 W: 3.268 hrs: 6.238 hrs: 106.9678 W

Answered: Image /qna-images/answer/6c950ca3-78d6-41e9-b61a-d27e326dd129.jpg

Answered: A sphere (emissivity=D0.42) of radius…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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You have the six pieces of metal listed below plus a beaker of water containing 400. g of water. The water temperature is 21.0 °C. Metals Specific Heat (J/g. K) Mass (g) 1. Al 0.9002 100. 2. Al 3. Au 4. Au 5. Zn 6. Zn 0.9002 0.1289 0.1289 0.3860 0.3860 50. 100. 50. 100. 50. The specific heat capacity of water is 4.184 J/g °C.
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