Egg in bottle

2001/09/01 Ares, Felix Iturria: Elhuyar aldizkaria

• Fisika
• Museoak

For starters we need a wide neck bottle. The neck should be wider than a bottle of water, but narrower than the egg. Those used for fruit juice are very suitable.

Now we will cook the egg. To do this, place the fresh egg in a bowl of the kitchen and fill with water to cover the egg well. Keep boiling for about 12 minutes.

Then let cool and remove the skin. Then the paper of the kitchen is collected with elongated shape so that it can be inserted into the bottle and a few drops of alcohol are poured at the end

Set fire with a match at the end impregnated with alcohol (be careful not to burn it) and insert the paper into the fire inside the bottle. Drop it to the bottom. Without wasting time, put the egg in the mouth of the bottle with the narrowest part inward and you will see how the egg will be inserted into the bottle (see figures 1 and 2).

Why has the egg been inserted into the bottle?

The answer is in the air components. In fact, about a third of the air is oxygen. When burned, the paper is combined with oxygen, it becomes soot and therefore the volume decreases dramatically.

Its combination with carbon hardly takes up space. That is, inside the bottle there has been a certain vacuum and atmospheric pressure has pushed inside the egg.