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DJJ20073 | T2_aida
Lecture Notes DJJ20073 – FLUID MECHANICS
TOPIC 2: Physical Properties of Fluid
a) Mass density, ρ
Mass density is a quantitative expression of the amount of mass contained per unit volume.
The standard unit is kilograms per meter cubed (kg/m3). The symbol most often used
for density is: (the Greek letter rho).
b) Specific Weight, ω
The specific weight is the weight per unit volume of a material. The symbol of specific weight is ω
(omega) or γ (gamma).
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DJJ20073 | T2_aida
c) Relative Density/ Specific Gravity, S
d) Specific Volume
e) Fluid Compressibility
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TUTORIAL:
1. Weight of a fluid is 8 kN and its density 9000 cm3
. Calculate the following:
i. Mass of fluid
ii. Specific weight of fluid
iii. Specific gravity of fluid
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DJJ20073 | T2_aida
2. Determine the density of fluid, ρ in kg/m3
. Given the mass and volume of fluid are 450g and
9cm3
respectively. Then, determine the specific volume in m3
/kg and specific gravity, if given
the density of water is 1000kg/m3
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DJJ20073 | T2_aida
3. If the mass and the volume of air is 11.5kg and 650cm3
. Calculate:
i. Mass density
ii. Specific weight
iii. Specific volume
iv. Relative density of air
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DJJ20073 | T2_aida
4. Given specific of fluid is 7.20kN/m2
and its mass 8.3kg. Calculate the following:
i. Volume of fluid
ii. Density of fluid
iii. Specific volume
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DJJ20073 | T2_aida
5. Determine the density of fluid, ρ in kg/m3
. Given the mass and volume of fluid are 450g and
9cm3
respectively. Then, determine the specific volume in m3
/kg and specific gravity, if
given the density of water is 1000kg/m3
.
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DJJ20073 | T2_aida
6. Given specific weight of fluid is 7.20kN/m2
and its mass 8.3kg. Calculate the following:
i. Volume of fluid
ii. Fluid density
iii. Specific volume
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DJJ20073 | T2_aida
7. A reservoir contains of 6000liter of oil weighing 50000N. Determine:
i. Mass density of oil, ρ
ii. Specific weight of oil, ω
iii. Specific gravity of oil, s
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DJJ20073 | T2_aida
8. If the volume of oil is 5.6m3 and weight is 46000N. Calculate:
i. Mass density, ρ in kg/m3
ii. Specific weight, ω
iii. Specific gravity of oil, s
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DJJ20073 | T2_aida
9. The volume of a stone is 1.5x10-4 m3
. If the relative density of the stone is 2.6. Calculate:
i. The density
ii. The specific weight
iii. The specific volume
iv. The weight
v. The mass
