Formulas Used to Determine the Density
Method
Buoyancy: Wa · (Rhofl – LA)
Rho = + LA
(Wa – Wfl) · Corr
where: Rhofl = density of the liquid causing buoyancy
Wa = weight of the sample in air
Wfl = weight of the sample in liquid
Corr = correction for buoyancy produced by the immersed
wire = 0.99983
LA = density of air = 0.0012 g/cm
3
Specific
gravity bottle: Wa · (Rhofl – LA)
Rho = + LA
Wfl + Wa – Wr
where: Rhofl = density of the reference liquid
Wa = weight of the sample
Wfl = weight of the reference liquid
Wr = weight of the sample + reference liquid
LA = density of air = 0.0012 g/cm
3
3–37
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