Principle of Egg Floating in Salt Water

Every time I tutor primary school students with their homework or take out my old textbooks, I find some differences, especially now there are so many scientific experiments. Various scientific experiments can allow you to experience different funs and understand some simple principles. For example, an egg can be used to make a very distinctive experiment. It's also very simple. The principle of why eggs can float on water. Let's take a look at the principle of eggs floating in salt water.

According to physical knowledge, F float = ρ liquid g V discharge

ρ Liquid density

V is the volume of the liquid displaced, which is equal to the volume of the object immersed in the liquid (suspension, sedimentation: the entire object is in the liquid, V is equal to the volume of the object; floating: part of the object is in the liquid, V is equal to the volume of the part of the object submerged in the water)

①If the density of salt water is greater than the density of eggs, the eggs will float

②If the density of salt water = the density of eggs, then the eggs are suspended in the liquid.

③If the density of salt water is less than the density of eggs, the eggs will sink.

Brain-boosting and intelligence-enhancing: The lecithin, triglycerides, cholesterol and yolk in egg yolks have a great effect on the nervous system and body development. They can prevent mental decline in the elderly and improve memory in all age groups.

Protect the liver: The protein in eggs can repair liver tissue damage. The lecithin in egg yolk can promote the regeneration of liver cells, increase the amount of plasma protein in the human body, and enhance the body's metabolic and immune functions.

Prevention and treatment of arteriosclerosis: American nutritionists and medical workers used eggs to prevent and treat arteriosclerosis and achieved unexpectedly amazing results.

Prevent cancer: Eggs contain more vitamin B2, which can decompose and oxidize carcinogens in the human body. Trace elements in eggs, such as selenium and zinc, also have anti-cancer effects.

Delaying aging: Eggs contain almost all the nutrients needed by the human body, so they are called "the ideal nutrient bank" and nutritionists call it "complete protein model". It is one of the longevity experiences of many centenarians.

The most nutritious cooking method: There are many ways to eat eggs. In terms of nutrient absorption and digestibility, boiled eggs are 100%, scrambled eggs are 97%, deep-fried eggs are 98%, deep-fried eggs are 81.1%, eggs mixed with boiling water or milk are 92.5%, and eaten raw are 30%~50%. Therefore, boiled eggs are the best way to eat them, but you should chew them slowly, otherwise it will affect absorption and digestion. However, for children, steamed egg custard and egg drop soup are the most suitable, because these two methods can loosen the protein and are easily digested and absorbed by children.

Eggs are high-protein foods. If consumed too much, it can lead to an increase in metabolic products and increase the burden on the kidneys. Generally speaking, it is more appropriate for children and the elderly to eat one egg a day, and for teenagers and adults to eat two eggs a day.

The statement that eating eggs frequently leads to high cholesterol is wrong - because egg yolks are rich in lecithin, a powerful emulsifier that can make cholesterol and fat particles extremely fine, allowing them to pass through the blood vessel walls smoothly and be fully utilized by cells, thereby reducing the cholesterol in the blood; moreover, after the lecithin in the egg yolk is digested, bile acid is released, which enters the blood and then synthesizes ethyl choline, the main substance of neurotransmitters, which can improve brain function and enhance memory.