2.87. The hydrometer shown in Figure P2.87 with no mercury has a mass of 0.01 kg. It is designed to float at the midpoint of the 120-mm-long stem in pure water. a. Calculate the mass of mercury needed. b. What is the specific gravity of the liquid if the hydrometer is just submerged? c. What is the specific gravity of the liquid if the stem of the hydrometer is completely exposed?

Elements Of Electromagnetics
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2.87. The hydrometer shown in Figure P2.87 with no mercury has a mass of 0.01 kg. It is designed to
float at the midpoint of the 120-mm-long stem in pure water.
a. Calculate the mass of mercury needed.
b. What is the specific gravity of the liquid if the hydrometer is just submerged?
c. What is the specific gravity of the liquid if the stem of the hydrometer is completely exposed?
Figure P2.87
Stem
5 mm dia.
150mm,
Mercury
1.5 cm dia.
Transcribed Image Text:2.87. The hydrometer shown in Figure P2.87 with no mercury has a mass of 0.01 kg. It is designed to float at the midpoint of the 120-mm-long stem in pure water. a. Calculate the mass of mercury needed. b. What is the specific gravity of the liquid if the hydrometer is just submerged? c. What is the specific gravity of the liquid if the stem of the hydrometer is completely exposed? Figure P2.87 Stem 5 mm dia. 150mm, Mercury 1.5 cm dia.
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