| http://www.w3.org/ns/prov#value | - wherein (g) is acceleration due to gravity, and ??p is the difference in density between the fluid sample 312 and the medium 318 into which the sample 312 is dispensed (e.g., ???? is substantially the density of the fluid sample 312 when the drops 316 are dispensed into a vacuum or a lighter gas medium 318 such as air).
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