What you will need:
Two
eggs, one hard boiled and one raw. Make sure the hard-boiled egg has been in
the fridge long enough to be the same temperature as the raw egg.
1. Spin the eggs and watch what
happens, one egg should spin while the other wobbles.
2. You can also lightly touch each of
the eggs while they are spinning, one should stop quickly while the other keeps
moving after you have touched it.
What is happening?
The
raw egg's center of gravity changes as the white and yolk move around inside
the shell, causing the wobbling motion. Even after you touch the shell it
continues moving. This is because of inertia, the same type of force you feel
when you change direction or stop suddenly in a car, your body wants to move
one way while the car wants to do something different. Inertia causes the raw
egg to spin even after you have stopped it, this contrasts with the solid white
and yolk of the hard-boiled egg, it responds much quicker if you touch it.
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