GEOG 2050 Chapter : Geog Chap.5
Document Summary
Heat= energy of molecular movement along a gradient. Heat is measured in calories: raise temp 1g of water by 1c, 1000 food calories= 1 calorie. Developed by daniel gabriel fahrenheit in 1724 (german physicist) Water at standard atmospheric pressure (atm) freeze/melt point (32f: boiling point (212f, 180 deg. apart. Developed by anders celsius in 1742 (swedish astronomer: also known as centigrade scale, water at atm, 0c=freeze/melt point, 100c=boil/steam point, 100 deg. apart, used worldwide, international system of units (si) Developed by lord kelvin 1848 (british physiscist: also known as absolute scale. 0k is absolute zero where all molecular motion ceases: no negative values. From c to f: f=(1. 8 x c) + 32. Sealed glass tube liquid heated expands (cooling contracts: calibrations mark temp. Cold weather thermometers: alcohol in glass, solid at -112c, -170f, cold climates bc alcohol freezes at low temps.
