METEO 300 Lecture Notes - Lecture 2: Rankine Scale, International System Of Units, British Thermal Unit
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Me 300 - lecture 2 dimensions and units. Primary dimensions (si units): mass (kilogram), length (meters), time (second), temperature (kelvin), electric current (ampere), amount of substance (mole). Derived dimensions: force = m a = 1 kg m = 1 newton (n) Energy = force length = 1 n m = 1 joule (j) Pressure =force time = 1 kg m23 = 1joules = 1 watt (w) Non-si units: mass (pound mass/lbm/slug), length (foot), time (second), temperature (degree rankine [r]) Energy = 1lbf: ft = 1 british thermal unit (btu) Power = 1 ft: lbf s2 = 1 pound force (lbf) s2 = 1 pound force (lbf) Does it appear to be reasonable and consistent: write one or more comments using step 9 as a guide. A small airplane, which travels at an airspeed of 200 miles/hour, makes a round trip. Each leg of the trip is 200 miles.
