3.1.4. Fluid Properties

Try these first

1. 1.

   Define density and provide its mathematical formula.

   Hint

   Think about how mass relates to volume.

2. 2.

   What does specific gravity tell us?

   Hint

   Remember that water has a specific gravity of 1.

3. 3.

   What formula is used to calculate density?

   • Density = Volume / Mass
   • Density = Mass / Volume
   • Density = Pressure / Volume

   Hint

   Recall the basic definition of density.

4. 4.

   True or False: Specific gravity is a dimensionless quantity.

   • True
   • False

   Hint

   Think about the units involved in the ratio.

5. 5.

   A tank holds water with a density of 1000 kg/m³ and oil with a density of 800 kg/m³. If the tank has equal volumes of both liquids, what will be the density of the combined liquid in the tank?

   Hint

   Consider the definition of an average density based on volume.

6. 6.

   If the specific gravity of a substance is 2.5, what is its density in kg/m³?

   Hint

   Use the fact that the density of water is 1000 kg/m³ to find your answer.