Pepper particles can float on the water surface due to water cohesion. It is a natural property of water molecules.
Water cohesion
Water cohesion refers to the property of water molecules associated with their sticking (i.e., water is attracted to water).
Pepper particles can float on the water surface because water molecules are highly cohesive.
Water molecules are arranged themselves in order to generate surface tension on the top of the water, thereby maintaining pepper particles floating on top.
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