You have a flat rock (total area = 1.2 m2) that is lying flat on the floor in a room at 20° C. The rock is 350° C and is 4 cm thick as it rests on the floor of the room. Does it transfer more heat into the room via conduction or radiation? The emissivity of this rock is 0.85 and you are welcome to guess which type of rock it is. Rock has the conductivity of concrete or brick.

Elements Of Electromagnetics
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ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Link: https://www.optotherm.com/emiss-table.htm - please show step by step explanation and solve this on paper so, it would be more easier for me to understand.
You have a flat rock (total area = 1.2 m2) that is
lying flat on the floor in a room at 20° C. The
rock is 350° C and is 4 cm thick as it rests on the
floor of the room. Does it transfer more heat into
the room via conduction or radiation? The
emissivity of this rock is 0.85 and you are
welcome to guess which type of rock it is. Rock
has the conductivity of concrete or brick.
Transcribed Image Text:You have a flat rock (total area = 1.2 m2) that is lying flat on the floor in a room at 20° C. The rock is 350° C and is 4 cm thick as it rests on the floor of the room. Does it transfer more heat into the room via conduction or radiation? The emissivity of this rock is 0.85 and you are welcome to guess which type of rock it is. Rock has the conductivity of concrete or brick.
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