Hence, (Wa - Wl)/(Wa - Ww) equals the specific gravity of the liquid.
Important Topics
1. Definitions of density and specific gravity.
2. Methods of finding density: (a) regular solids; (b) irregular solids; (c) solids lighter than water; (d) liquids by hydrometer; (e) liquids by loss of weight.
Exercises
Note.—Consider that 1 cu. ft. of water weighs 62.4 lbs. Consider that 1 ccm. of water weighs 1 g.
1. What is meant by the statement that a block of wood has a specific gravity of 0.6?
2. Considering that the density of the human body is the same as that of water, what is the volume of a 125-lb. boy? Of a 250-lb. man? Of a 62.4-lb. boy? What is the volume of your body?
3. How is the weight of large ships found? Give an example.