A feather "floats" because the density of the air molecules surrounding it is only slightly less than the feather itself. The air has a "resistance" which is applied to the feather as it falls, making it appear as though it is floating downwards. In a vacuum however, where no atmospheric molecules are present, the feather will fall as fast as any other object, regardless of mass.
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Ducks have a high fat content in their bodies, which makes them more buoyant and helps them float on water. Additionally, their bodies are designed with air pockets that also aid in keeping them afloat.
Rubber ducks will float higher in saltwater compared to freshwater or chlorinated water due to the increased density of saltwater. Saltwater is denser than freshwater and chlorinated water, providing more buoyancy to objects like rubber ducks.
Rubber ducks float in the bathtub because they displace water and are less dense than the water around them. This buoyancy allows them to stay on the surface of the water rather than sinking.
Actually, they do float. They are lighter than air, so they are supposed to float.
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No, a coin can not float on gasoline.