i am helping my son with a science project,and the one i was wanting to know about is the egg squeezing in jar

Answer 1

First you need to find a jar where a hard boiled egg can sit on the opening without falling through. Then drop a few matches in the jar and let them burn out (this is just to heat up the air inside the jar, you can pick the method as long as the air inside the jar gets hot). The, place the egg on the opening. As the air cools it will suck the egg into jar. Also, some oil around the rim of the jar or on the egg will keep the egg surface from tearing.

Answer 2

Take a jar and a hard boiled egg. Place a small amount of water in the jar. Heat the water in the jar for a while. This will cause the water to expand and push out some of the air in the jar. While still heating, then place the egg on the jar and remove from heat source. As the air cools, it will decrease pressure. The ambient atmospheric pressure will push the egg into the jar.
A variation on this is to take some sort of metal can--like a mineral spirits can. [Empty it out of course.] Put in some water and set over a heat source. Allow water to boil. While water is still boiling, remove from heat and then put cap very tightly back onto can. As it cools, the can will implode and crush itself.
This is a demonstration of Charles Law. The increase temperature, increase pressure one.

Answer 3

if you have a jar..with a match at the bottom of it..take a hard~boiled egg and set it on top of the jar..it will slowing sink in through the jar ♥