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<blockquote data-quote="Kes1" data-source="post: 2077622" data-attributes="member: 172193">Wind would have both kinetic energy of the mass and kinetic energy of the individual gas molecules, both a result of motion.&nbsp; If wind drives a ship some of its kinetic energy of the mass is converted to mechanical work that may ultimately heat the sea very slightly.&nbsp; The kinetic energy of the gas molecules results in an average temperature where some of the molecules are instantaneously warmer or colder as they bounce off of each other or a container wall.&nbsp; If free gas gets slightly warmer it expands reducing its temperature slightly.&nbsp; On a cold day wind chill results because the wind strikes an object (person) with more gas molecules per unit time increasing heat transfer and dropping the temperature of the object more quickly to wind temperasture (but not lower).&nbsp; For a person that feels colder than still air with less heat transfer.Humidity can exist even below freezing because ice can sublimate giving off water molecules from the solid rather than the liquid.&nbsp; Water molecules can leave and reenter an ice cube in a freezer but if the freezer removes moisture the ice cubes will shrink.&nbsp; The kinetic energy of the water molecules within an ice cube is randomly distributed and constantly changing for any particular water molecule.&nbsp; If a water molecule randomly receives enough energy to break crystal bonds it may depart the ice cube as in evaporation.&nbsp; It has been said that there is always steam within ice and ice within steam if you can detect a few water molecules the have randomly acquired more or less than average kinetic energy, but collisions and vibrations instantly change the situation and the average temperature prevails.</blockquote>

[QUOTE="Kes1, post: 2077622, member: 172193"] Wind would have both kinetic energy of the mass and kinetic energy of the individual gas molecules, both a result of motion. If wind drives a ship some of its kinetic energy of the mass is converted to mechanical work that may ultimately heat the sea very slightly. The kinetic energy of the gas molecules results in an average temperature where some of the molecules are instantaneously warmer or colder as they bounce off of each other or a container wall. If free gas gets slightly warmer it expands reducing its temperature slightly. On a cold day wind chill results because the wind strikes an object (person) with more gas molecules per unit time increasing heat transfer and dropping the temperature of the object more quickly to wind temperasture (but not lower). For a person that feels colder than still air with less heat transfer. Humidity can exist even below freezing because ice can sublimate giving off water molecules from the solid rather than the liquid. Water molecules can leave and reenter an ice cube in a freezer but if the freezer removes moisture the ice cubes will shrink. The kinetic energy of the water molecules within an ice cube is randomly distributed and constantly changing for any particular water molecule. If a water molecule randomly receives enough energy to break crystal bonds it may depart the ice cube as in evaporation. It has been said that there is always steam within ice and ice within steam if you can detect a few water molecules the have randomly acquired more or less than average kinetic energy, but collisions and vibrations instantly change the situation and the average temperature prevails. [/QUOTE]

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