Explanation: The raw egg has a fluid inside and the hard-boiled is solid. You will lose energy to viscous dissipation in the case of the raw egg since it will take some time to spin up the internal fluid in the raw case. Or better, you can spin both of them up, then stop them both suddenly and then release them - the raw egg should start spinning up again because although the shell might have stopped, the internal fluid did not, so it then spins up the egg. Even more fun, if you spin them fast, the hard boiled egg will rise up.