479. assignment (hydrometer)
Ql. The hydrometer shown below floats with half its stem submerged when it is placed in pure water (SG=1.0). The same hydrometer floats with the entire stem exposed when placed in an unknown fluid. Note: the figure is not to scale.
a) What is the weight of the hydrometer in N?
b) What is the SG of the unknown fluid?
Hint: V sphere = 4/3 Pi r^3
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