An object weighing 344 N in air is immersed in water after being tied to a string connected to a balance. The scale now reads 260 N. Immersed in oil, the object appears to weigh 283 N. (a) Find the density of the object. kg/m3 (b) Find the density of the oil. kg/m3
(a)
ρobject = ρw/[1 - Wwater / Wair]
= (1000 kg/m3)/[1 - 260 N / 344 N]
= 4.08*103 kg/m3
(b)
ρoil = ρobject[1 - Woil / Wair]
= (4.08*103 kg/m3)[1 - 283 N / 344 N]
= 7.23*102 kg/m3
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