1 tip on egg
Is the egg boiled or raw?
Have you ever found an egg in a refrigerator and had no idea if it's already boiled or not? Well, there is an easy way to find out! Try spinning the egg around. If the spin is fast - the egg is already boiled. If the spin is slow and holds only for a couple of spins - the egg is raw.
The reason for that is that the raw egg is liquid inside, and this liquid is interfering with the spin.