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Higher density.
Salt water is denser than fresh.
The older an egg is the more likely it is to float. If it actually sits on the surface it may actually have gone bad.
why does an egg float or sink in water
An egg will sink in water but will float in salt water. An egg will sink faster in hot water than it will in cold water.
It floats or if it sinks it is fresh and if it goes in the middle it could be rotten or not it depends
An egg will float in salt water because the salt makes it denser and allows the egg to stay near the surface. But in regular water it will sink straight to the bottom.
A fresh chicken egg will sink, an old egg will float. The egg has an air pocket in the blunt end that grows as the egg dries out.
fresh water
In a denser liquid.A raw egg will sink in fresh water, but float in salt water. It also depends on how fresh the egg is.Set an egg in cold water-If the egg stay at the bottom - it is fresh.If the egg is at an angle on the bottom - it is still fresh and good to eat.If the egg stands on its pointed end at the bottom - it is still safe to eat but best used for baking or boiled eggs.If the egg floats - it is best discarded.
i think it is ppeople because they float in salt water and sink in fresh water.