A certain object floats in fluids of density Which of the following statements is true?
A)the buoyant force of fluid 1 is greater than the buoyant forces of the other two fluids
B)the buoyant force of fluid 3 is greater than the buoyant forces of the other two fluids
C)the three fluids exert the same buoyant force
D)the object displace the same volume of all three fluids
E)none of these are true

Question

A certain object floats in fluids of density  Which of the following statements is true?
A)the buoyant force of fluid 1 is greater than the buoyant forces of the other two fluids 
B)the buoyant force of fluid 3 is greater than the buoyant forces of the other two fluids 
C)the three fluids exert the same buoyant force 
D)the object displace the same volume of all three fluids 
E)none of these are true

Quizplus · Accepted Answer

The buoyant force exerted on an object is equal to the weight of the fluid that the object displaces. Therefore, since the object floats in all three fluids, it displaces the same volume of each fluid. Since the fluids have the same density, they have the same weight per unit volume, and therefore the buoyant forces exerted by each fluid are equal. Therefore, choice C is true.

A Certain Object Floats in Fluids of Density Which