An egg is placed at the bottom of a bowl filled with water. Salt is slowly added to the water until the egg rises and floats. From this experiment, we conclude that
A)egg-shell calcium is repelled by sodium chloride.
B)the density of salt water exceeds the density of the egg.
C)buoyant force does not always acts upward.
D)salt sinks to the bottom.
E)none of the above

Question

Quizplus · Accepted Answer

When salt is added to the water, the density of the water increases. As the density of saltwater exceeds the density of the egg, the egg rises and floats. Therefore, option B is the correct answer. Option A is incorrect as there is no repulsion between egg-shell calcium and sodium chloride. Option C is incorrect as the buoyant force always acts upward, as stated by Archimedes' principle. Option D is incorrect as salt dissolves in water and does not sink to the bottom.

An Egg Is Placed at the Bottom of a Bowl