Materials Required Peeled hard-boiled egg A jar with opening slightly smaller than the diameter of the egg Very hot water. How to do it Set the egg on the bottle. Run the bottle under very hot tap water. Warmed air will escape around the egg. Set the bottle away from the hot water. As it cools, the egg will be pushed into the bottle. Explanation When the temperature of the air inside the bottle is changed by putting the fire inside, there is a change in the pressure of the air inside the bottle. Hence when the jar is cooled, there is change in pressure and Hence the egg is pulled inside the jar.
How to do it
Explanation