Hello, I'm a horticulturist with a passion for all things botanical. I have extensive knowledge of plant biology and the properties of various fruits, including watermelons. Let's dive into the question at hand.

Watermelons are unique fruits with a rind that is less dense than water, which allows them to float on the surface. The density of an object is determined by its mass compared to its volume. Since watermelons have a high water content and a relatively large volume, they tend to displace more water than their mass would suggest, resulting in a buoyant force that keeps them afloat. However, it's important to note that the ability of a watermelon to float can be influenced by several factors, including the size of the watermelon, its ripeness, and the water's salinity.

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A watermelon floats because it is less dense than the liquid in which it floats. An object's density, relative to the liquid it's sitting in, is the property that determines whether an object floats or sinks. If an object is denser than a liquid, then the object sinks.read more >>