Air has a very low thermal conductivity. This explains whywe feel comfortable wearing short sleeves in a 20°C environment eventhough our body temperature is 37°C. Material objects feel cooler to ourimmediate touch than the air, owing to relatively high thermal conductivities.(a) Touch a few surfaces in a room-temperature environment andrank them in order of which feel the coolest to which feel the warmest.Objects that feel cooler have larger thermal conductivities. Consider awood surface, a metallic surface, and a glass surface, and rank these inorder from coolest to warmest

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Air has a very low thermal conductivity. This explains why
we feel comfortable wearing short sleeves in a 20°C environment even
though our body temperature is 37°C. Material objects feel cooler to our
immediate touch than the air, owing to relatively high thermal conductivities.
(a) Touch a few surfaces in a room-temperature environment and
rank them in order of which feel the coolest to which feel the warmest.
Objects that feel cooler have larger thermal conductivities. Consider a
wood surface, a metallic surface, and a glass surface, and rank these in
order from coolest to warmest

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