Q. Calculate the Specific weight and mass density of an oil of weight 150 kN and occupies a volume of 15 m³.
SOLUTION
Weight of oil, W = 150kN = 150 * 1000N
Volume of oil V = 15m ^ 3
Specific weight of oil w = ?
Mass density ρ = ? SPECIFIC WEIGHT OF THE OIL= weight of oil/Volume of the oil
w = W/V
= (150 * 1000)/15
= 10000Nm^3 MASS DENSITY
ρ = w/g ( g taken as = 9.81kgm³)
ρ =10000/(9, 81)
= 1019.37kgm ^ 3
The specific weight of the oil is 10000Nm ^ 3 and the density is 1019.37kgm ^ 3
Q. Calculate the specific weight, Mass density and specific gravity of an oil weighing 130 kN and occupies a volume of 15 m³.
SOLUTION:
Given data:
Weight of the oil ,W =130 kN = 130×1000 N
Volume of the oil,V = 15 m³
Specific weight,w = ?
Mass density,p = ?
Specific gravity,S = ? SPECIFIC WEIGHT OF THE OIL
= weight of the oil/ volume of the oil
w = W/V = (130 * 1000)/15
= 8666.67N / (m ^ 3) MASS DENSITY ρ = w/g
= 8666.67/9.81 ( g taken as = 9.81kgm³)
= 883.45kgm³ SPECIFIC GRAVITY OF OIL S = density of oil/ density of water
= 883.45/1000 ( density of water 1000kgm³
= 0.883
