The hydrometer shown in Fig. is used to measure the specific gravity of liquids. The length of the stem protruding above the fluid surface of the liquid in which the hydrometer floats is a function of the specific gravity of the liquid. If the mass of the hydrometer is 0.045 kg and the cross-sectional area of its stem is 290 mm2, determine the distance between graduations on the stem for specific gravities of 1.00 and 0.90.
