19) Ice cubes submerged at the bottom of a liquid indicate that the liquid A) is less dense than ice. B) is warmer than the ice. C) is only partly displaced by the submerged ice. D) produces insufficient buoyant force on the ice. 20) Two life preservers have identical volumes, but one is filled with Styrofoam while the other is filled with sand. When the two life preservers are fully submerged, the buoyant force is greater on the one filled with A) sand. B) same on each as long as their volumes are the same C) Styrofoam. 21) Compared to an empty ship, the same ship loaded with Styrofoam will float A) lower in the water. B) higher in the water. C) at the same level in the water. 22) The amount of water displaced by a liter-sized block of ordinary wood floating in water is A) depends on the water density B) 1 liter. C) more than 1 liter. D) less than 1 liter. E) none of the above 23) When you float in fresh water, the buoyant force that acts on you is equal to your weight. When you float higher in the denser water of the Dead Sea, the buoyant force that acts on you is A) equal to your weight. B) greater than your weight. C) less than your weight. 24) A floating ice cube contains small pieces of iron. The water level after melting will A) rise. B) remain unchanged. C) fall. 25) When an ice cube in a glass of water melts, the water level A) remains the same. B) falls. C) rises.