A 50-mL, 75-g object is immersed in water.  What is its apparent mass in water?
(Density of water is 1 g/mL)

The object will be lighter in water therefore the mass of water will be subtracted from the object.


Mass of body
75-g
75-g
Volume of body
50-mL
.
Volume of fluid displaced
50-mL
.
Mass of fluid displaced 
(Salt water has a density of 1.1-g/mL)
50-g
- 50-g
Mass of body while water (subtract) .
  25-g

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