Q. Calculate the specific mass, specific weight and specifie gravity of one litre of liquid their weights 12N.

Q. Calculate the specific mass, specific weight and specifie gravity of one litre of liquid their weights 12N.

Solution:
Volume of liquid V = 1 litre
Weight of liquid w = 12N
MASS m = w/g

= 12/9.81

= 1.223kg
SPECIFIC MASS = mass/ volume

= (1223g)/(1000c * m ^ 3)

= 1.223g / cm^3
SPECIFIC GRAVITY = sp. weight of liquid/ sp. weight of water

= (12kNm^3/(9.81kNm^3))

= 1.223 ( no units)

DEFINITION:

MASS:Mass density (or specific mass) of a fluid is its mass per unit volume. It is denoted by a symbol p (rho). In S.I units it is expressed in KN/m³

SPECIFIC GRAVITY  : the ratio of specific weight of the fluid to the specific weight of standard fluid. It is dimensionless and has no units.