What does it mean when an egg floats in hot water?

Online Answer
An egg can float in water when its air cell has enlarged sufficiently to keep it buoyant. This means the egg is old, but it may be perfectly safe to use. Crack the egg into a bowl and examine it for an off-odor or unusable appearance before deciding to use or discard it.
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The Bottom Line. Stuffed pasta noodles will float to the surface during the cooking process. ... Pasta is done when it's al dente, or to the tooth. That's that short moment of time when it's still firm to the but, but cooked just enough to be easy to chew and very digestible for your body.
If the chestnuts sink, they are fresh. If the chestnuts float, remove them from the bowl and cut them in half. Discoloration and mold on the inside meat of the chestnut indicates spoilage. The other reason fresh chestnuts may float involves drying.
When the gnocchi first touches the boiling water, the outside cooks quickly. Then, the water inside the gnocchi begins to evaporate, but the air can't escape because the outside is already cooked. ... This essentially lowers the density of the gnocchi, causing it to float when it's completely cooked.".
To perform the float test, gently set your egg into a bowl or bucket of water. If the egg sinks, it is fresh. If it tilts upwards or even floats, it is old. This is because as an egg ages, the small air pocket inside it grows larger as water is released and replaced by air.
When you fry a food item, such as French fries, its density becomes less than the oil in which it is being fried. ... Water is heavier than oil, but the process of frying makes the food less dense than the oil surrounding it, thus making it float.