Q4: A spherical object that is made of a material with specific heat-383 J/kg.K, and density 8954 kg/m'. The diameter of the sphere is 5-cm and it is initially at a uniform temperature of 150 C. It is suddenly exposed to an environment at 20 C having a heat-transfer coefficient h-28W/m2 C. Using the lumped-capacity method of analysis, calculate the time necessary for the sphere emperature to reach 90 C.
Q4: A spherical object that is made of a material with specific heat-383 J/kg.K, and density 8954 kg/m'. The diameter of the sphere is 5-cm and it is initially at a uniform temperature of 150 C. It is suddenly exposed to an environment at 20 C having a heat-transfer coefficient h-28W/m2 C. Using the lumped-capacity method of analysis, calculate the time necessary for the sphere emperature to reach 90 C.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Q4: A spherical object that is made of a material with specific heat=383 J/kg K , and density = 8954 kg/m’. The diameter of the sphere is 5-cm and it is initially at a uniform temperature of 150¢C. It is suddenly exposed to an environment at 20-C having a heat-transfer coefficient h=28W/m? -
![Q4: A spherical object that is made of a material with specific heat-383 J/kg.K , and density =
8954 kg/m. The diameter of the sphere is 5-cm and it is initially at a uniform temperature of
150•C. It is suddenly exposed to an environment at 20 C having a heat-transfer coefficient
h=28W/m? C. Using the lumped-capacity method of analysis, calculate the time necessary
for the sphere emperature to reach 90 C.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9c4835c8-8551-4570-9b46-fc903bdde046%2F238f48c6-040f-4a9a-bca3-fd06fc71fab5%2Fzqckeyw_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Q4: A spherical object that is made of a material with specific heat-383 J/kg.K , and density =
8954 kg/m. The diameter of the sphere is 5-cm and it is initially at a uniform temperature of
150•C. It is suddenly exposed to an environment at 20 C having a heat-transfer coefficient
h=28W/m? C. Using the lumped-capacity method of analysis, calculate the time necessary
for the sphere emperature to reach 90 C.
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