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A 6-kg piece of metal displaces 1 liter of water when submerged. What is its density?

Density = mass/volume 1 liter of water = 1000 cm3 = 1 kg

Ans: 6 kg / 1000 cm3 = .006 cm3

How would this one work out?

When a 2.0-kg object is suspended in water, it ‘masses’ 1.5 kg. What is the density of the object?

I'm guessing:

Density = mass/volume = 2.0 kg/1.5 kg = 1.333

Or 2.0 kg/ 1500 cm3 = .00133 cm3

Now I'm totally lost on what to do:

A vacationer floats lazily in the ocean with 90% of his body below the surface. The density of the ocean water is 1.025 kg/m3. What is the vacationer’s average density?

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# Fluid Mechanics Density problems

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