please guys if u can explain this in 1 para. it be a great help.
2006-11-08 14:08:04 · 3 answers · asked by kewl_dave_us_05 2 in Science & Mathematics ➔ Physics
The water evaporates from the head (Maxwell-Boltzmann distribution)
Evaporation lowers the temperature of the glass head (heat of vaporization)
The temperature drop causes some of the dichloromethane vapor in the head to condense
The lower temperature and condensation together cause the pressure to drop in the head (ideal gas law)
The pressure differential between the head and base causes the liquid to be pushed up from the base.
As liquid flows into the head, the bird becomes top heavy and tips over during its oscillations.
When the bird tips over, the bottom end of the neck tube rises above the surface of the liquid.
A bubble of vapor rises up the tube through this gap, displacing liquid as it goes
Liquid flows back to the bottom bulb, and vapor pressure equalizes between the top and bottom bulbs
The weight of the liquid in the bottom bulb restores the bird to its vertical position
2006-11-08 14:17:59 · answer #1 · answered by Drink Beer! 1 · 0⤊ 0⤋
First, the bird does not have air in it but a vapor. The liquid inside is one with a very low boiling point, near room temperature. Over the years, the specific liquid has changed. The space is filled with the vapor of this liquid. When the head gets wet, the evaporation of the water from the furry head cools it. The cooled vapor inside condenses back to liquid, decreasing the volume and sucking liquid from the base up the tube. When the liquid gets high enough, the bird overbalances and tips over. The tipping action lets some vapor back into the tube, dropping the liquid back to the bottom. This makes the bird tip back up and everything starts over.
2006-11-08 22:38:14 · answer #2 · answered by Pretzels 5 · 0⤊ 0⤋
Wow! Do they still make those things!? I used to be amazed by them when I was a kid. They are pretty cool!
Heat makes it work. The air inside expands forcing the fluid up inside the inner glass tube to the head of the duck making it fall forward. This allows the fluid to drain back into the base and the cycle repeats
That is about as simple as I can explain it for you.
2006-11-08 22:19:19 · answer #3 · answered by Mr. Right 4 · 0⤊ 0⤋