ATOC 181 Lecture Notes - Lecture 4: Phase Velocity, Soot, Planck Constant
12 Oct 2017
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Adiabatic process: no heat exchange between air parcel & surrounding. Wind chill: increased heat loss due to presence of wind. Over our skin, insulating air layer (few mm thick) Winds transport some of this warm air away. To replenish this layer, body gives off more heat. In addition: increased evaporation from skin in dry air conditions and when skin is wet. Temperature: a measure of the average kinetic energy (average speed) of atoms and molecules. Evaporation (liquid vapor) requires energy and is therefore a cooling process that can cool the air. Condensation (vapor liquid) gives up energy to the surrounding environment and is a warming process. Heat is energy in the process of being transferred between objects due to a temperature difference. temperature difference. Conduction: heat transfer molecule-to-molecule from warmer to colder regions. Air is a poor conductor of heat, so significant conduction occurs only in the first few millimeters above the earth surface.
