Why the fresh egg sink in water?

A fresh egg will sink in water because it has a higher density than water. Here's why:

* Egg Composition: An egg is primarily made up of water, but it also contains protein, fat, and a hard shell.

* Air Pocket: Inside the egg, there's an air pocket at the wider end. This air pocket is small in a fresh egg.

* Density: The density of an object is its mass divided by its volume. The combination of the egg's solid components and the small air pocket makes the egg denser than water.

Why older eggs float: As an egg ages, the air pocket inside grows larger. This is because moisture escapes through the porous shell, causing the egg's contents to shrink and the air pocket to expand. With a larger air pocket, the overall density of the egg decreases. When the egg's density becomes less than the density of water, it floats.

In summary: Fresh eggs sink because they are denser than water due to their smaller air pocket. Older eggs float because their larger air pocket lowers their overall density.