Basic Units of Measurement and Conversions - Basic Mathematics for Water and Wastewater Operators - page 28

■ Example 2.49
Problem : Find the specific gravity for a rock if the density is 162 lb/ft 3 .

Solution:

3
3

Densityofrock
Densityof

162 lb/ft
62.4 lb/ft

Specificgravity = = = 260 .

water

■ Example 2.50
Problem : Find the specific gravity of a dry chemical that has a density of 65 lb/ft 3 .

Solution :

3

Densityofdry chemical
Den

65 lb/ft
62.4 lb/ft

Specificgravity = = =104 .

3

sity of water

■ Example 2.51
Problem : Find the specific gravity for a liquid chemical that weighs 11.07 lb/gal.

Solution :

Densityofliquidchemical 11.07 lb/gal

8.34lb/gal

Specificgravity = = =1.3

Density of water

■ Example 2.52
Problem : Find the specific gravity for an acid that weighs 10.5 lb/gal.

Solution:

Densityof acid
Densityof

10.5 lb/gal
8.34 lb/gal

Specificgravity = = =1.

water

■ Example 2.53
Problem : Find the specific gravity for a liquid chemical that weighs 12.34 lb/gal.

Solution :

Densityofliquidchemical 12.34 lb/gal

8.34 lb/gal

Specificgravity = = =1.5

Density of water