ENGG 201 Lecture Notes - Lecture 1: Electric Current, Viscosity, Kilogram
4 Jun 2016
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The phase rule, pure substance behaviour (p3 - l3/4) Ideal gas behaviour, ideal gas mixtures (p - l7/8) Engineering is a tool to e ciently produce conditions or things that are di erent from the state in which they naturally exist. Conditions (p, t, etc) -> phase(s) -> properties (density, viscosity, conductivity) 2. 2 fundamental & derived quantities** (often rst mistake made in midterms and nal exams) Mass, length, time - fundamental quantities or dimensions. With these, we can de ne any number of quantities. Velocity, viscosity, to de ne thermodynamic and other quantities we also need: temperature, current, light intensity the dimensions of any quantity can be de ned in terms of fundamental quantities: [] - the dimensions of (cid:12254) (cid:12254) (cid:12254) (cid:12254) (cid:12254) As long as at least one of alpha, beta, or g is not zero -> then a has dimensions (a is dimensional) also means a will have units.
