Question

An unknown solid weighs 31.6 N. When submerged in water, its apparent weight is 19.8 N. What is the specific gravity of the unknown sample? A. 2.96 B. 2.68 C. 2.02 D. 1.68

Answer 1

Weight of water displaced = 31.6 N - 19.8 N = 11.8 N

By definition of specific gravity S = 31.6 / 11.8 = 2.68

The object weighs 2.68 times its equivalent weight of water

(B)