Question

Name and state the principal on which lactometer and hydrometer are based upon.

Answer 1

Both are based on archimides principle.

Lactometer is a device used for finding the purity of a milk sample. It works on the principle of Archimede's principle that a solid suspended in a fluid will be buoyed up by a force equal to the weight of the fluid displaced. If the milk sample is pure, then the lactometer floats on it and if it is adulterated or impure, then the lactometer sinks.

The point at which the surface of the liquid touches the stem of the hydrometer correlates to specific gravity.

The hydrometer makes use of Archimedes' principle: a solid suspended in a fluid is buoyed by a force equal to the weight of the fluid displaced by the submerged part of the suspended solid.