GEOL 1340 Lecture Notes - Lecture 2: Dynamic Equilibrium, Thermostat, Refraction
24 Aug 2016
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Document Summary
Open: e and matter flow in and out of system. Self-contained as e and matter don"t leave system. Examples of open system o o o o. Solar radiation and precipitation in, evaporation and latent heat out. Change in system triggers one or more mechanisms that reverses that. Example: thermostat (furnace kicks in to maintain t) Threshold: when system tries to resist abrupt change but reaches the point where it no longer maintains character. Variables o o o o o o o. Measured relative to known mass of standard using balance (doesn"t change on different planets) o. Weight: measure of gravity on an object (changes) Sensible heat: heat we feel (changes t of substance) Latent heat: heat absorbed/released due to phase changes (liquid changing to vapor for example) Molecules on hot end are rapidly vibrating (high k e) Molecules on cooler end have lower k e. Heat transferred thru mvmt of material due to t differences.
