Ferbixo Novelty Perpetual Motion Machine Lucky Swaying Drinking Bird Unique Classic Moving Decor Birthday Christmas Gift

Operation: The drinking bird is a heat engine that exploits a temperature difference to convert heat energy to a pressure difference within the device, and perform mechanical work. Like all heat engines, the drinking bird works through a thermodynamic cycle. The initial state of the system is a bird with a wet head oriented vertically. The process operates as follows: 1.The water evaporates from the felt on the head. 1.Theporation lowers the temperature of the glass head (heat of vaporisation). 1.The temperature decrease causes some of the dichloromethane vapour in the head to condense. 1.The lower temperature and condensation together cause the pressure to drop in the head (by the ideal gas law). 1.The higher vapour pressure in the warmer base pushes the liquid up the neck. 1.The the liquid rises, the bird becomes top heavy and tips over. 1.Then the bird tips over, the bottom end of the neck tube rises above the surface of the liquid. 8.A bubble of warm vapour rises up the tube through this gap, displacing liquid as it goes. 1.Theuid flows back to the bottom bulb (the toy is designed so that when it has tipped over the neck’s tilt allows this), and pressure equalises between the top and bottom bulbs 1.The weight of the liquid in the bottom bulb restores the bird to its vertical position 1.The liquid in the bottom bulb is heated by ambient air, which is at a temperature slightly higher than the temperature of the bird’s head. WARNING! The fluid and dye inside the bird can permanently stain, and the bird’s glass body can easily be broken. ldren are fascinated by the boing bird, and the educational possibilities are great. But they should watch it, not fondle it!! Package Includes: 1 x stand Drinking Water Bird