試題詳解

14. Under what circumstance would buoyance become a non-negligible factor and should be accounted for when using an analytical balance accurate to± 0.1 mg.
(A) Variation of the temperature in the laboratory
(B) The density of standard weights is 8.0 g/cm³ and the density of the object being weighed is 0.2 g/cm³
(C) The density of the object being weighed is 16 g/cm³
(D) Density has little role in buoyance consideration
(E) None of the above