BIOL 1001 Chapter : Chapter 1 PowerPoint
Document Summary
Objective: to understand fluid properties (definition, dimension/units, typical value, and influencing factors) Properties involving mass and weight (density ) Mass per unit volume, mass/volume = m/ v= . Typical values: water = kgm-3, air = kgm-3. For liquid, density depends on temperature and is independent of pressure, i. e. = f(t ) (1) ( decreases with increasing t) The density of water at 4 oc is 1000 kg/m3 (62. 4 lbm/ft3). The density of water at 30 oc is 995. 65 kg/m3. The density of mercury at 20 oc is 13. 6 103 kg/m3. In fluid mechanics, we frequently use 1/ . Thus, we define it as a specific volume ( ), i. e. = 1/ . It is related to density through the equation = g. G = local acceleration of gravity, 9. 81 m/s2 or 32. 2 ft/s2. Typical values: water = 9810 nm-3, air = 12. 07 nm-3.
