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What does the drinking bird use to evaporate water from its head?
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How did the drinking bird from the 1960s work to continue to bob its head into a glass of water?
The classic bobbing or drinking bird toy has amused kids and adults for years. It appears to be perpetual motion (impossible) but is actually a heat engine with a lot of thermodynamics going on. Although the bird is often thought to be a recent invention it was invented in 1945 and patented in 1946. The "toy" was the brainchild of to PHD candidates, Miles V. Sullivan and George H. Shackley. The science is so complex that it has been the basis of several thermodynamics courses.The classic bird is made from two glass bulbs joined by a glass tube. The tube extends almost to the bottom of the bottom bulb. It is joined to the top bulb but only at the end. The bulb contains some fluid which evaporates and condenses easily at about room temperature. The bird so far is similar in construction to the "love meters" which move fluids from one bulb to the other based on the heat of your hand.The other parts of the bird are a bird beak or head made of absorbent material, a pivot which lets the bird balance on a stand, and a glass of water for the bird to dip its beak into. The actual operation of the bird is the result of several gas laws, evaporative cooling and, pressure changed due to heat, leverage and showmanship!What happens is:The birds felt (or similar) head is dampened with water and positioned in front of a glass of water located so that the beak will swing down into the water if it moves forward about the pivot.The water on the felt evaporates cooling the head, creating a vacuum in the gases (through condensation of the gas there) and subsequently sucking up fluid from the bottom bulbThis makes the head heavier and it swings down dipping the nose into the water.The water absorbs into the beak fabric, warming the fabric and the bulb, which in turn warms the gases in the head.The warmed gases expand increasing the top bulb pressure and expelling the fluid back into the bottom bulbThe head (now lighter as the fluid is gone) raises, the water starts to evaporate cooling the head and restarting the cycle
What is a root head?
One use of the word root head is for a hunting decoy of a bird, in which the head has been carved from the root of the tree.
What would you do if you were at a volcano and it erupted?
i would run like a bird whith no head
What is a heron with red spot on head?
If it is a grey bird with a red "cap" it could be a Sandhill Crane
Do oil spills evaporate in salt water?
Not entirely. The oil that spilled in the gulf coast will change in composition with time, due to evaporation and biological processes. It may exist the well head as a light oil and wash up later on beaches as an oil emulsion, or tar balls with a much higher viscosity.
How is energy stored in the dunking bird?
When the bird's head is in the water, the cool water soaks into the felt head. This causes the liquid inside the bird to contract, making the tail end denser. This causes the bird to tip the head out of the water. The air is warm enough to heat up the thin layer of water, causing the water to evaporate, and the liquid inside to expand. This makes it rise up the inside tube and tip the bird back into the water, and the cycle begins again. So, in short, I suppose the energy in the bird is stored as heat.
How does a baby chicken drink water?
By dipping its beak in the water, then tilting it's head back and drinking it.
How did the drinking bird from the 1960s work to continue to bob its head into a glass of water?
The classic bobbing or drinking bird toy has amused kids and adults for years. It appears to be perpetual motion (impossible) but is actually a heat engine with a lot of thermodynamics going on. Although the bird is often thought to be a recent invention it was invented in 1945 and patented in 1946. The "toy" was the brainchild of to PHD candidates, Miles V. Sullivan and George H. Shackley. The science is so complex that it has been the basis of several thermodynamics courses.The classic bird is made from two glass bulbs joined by a glass tube. The tube extends almost to the bottom of the bottom bulb. It is joined to the top bulb but only at the end. The bulb contains some fluid which evaporates and condenses easily at about room temperature. The bird so far is similar in construction to the "love meters" which move fluids from one bulb to the other based on the heat of your hand.The other parts of the bird are a bird beak or head made of absorbent material, a pivot which lets the bird balance on a stand, and a glass of water for the bird to dip its beak into. The actual operation of the bird is the result of several gas laws, evaporative cooling and, pressure changed due to heat, leverage and showmanship!What happens is:The birds felt (or similar) head is dampened with water and positioned in front of a glass of water located so that the beak will swing down into the water if it moves forward about the pivot.The water on the felt evaporates cooling the head, creating a vacuum in the gases (through condensation of the gas there) and subsequently sucking up fluid from the bottom bulbThis makes the head heavier and it swings down dipping the nose into the water.The water absorbs into the beak fabric, warming the fabric and the bulb, which in turn warms the gases in the head.The warmed gases expand increasing the top bulb pressure and expelling the fluid back into the bottom bulbThe head (now lighter as the fluid is gone) raises, the water starts to evaporate cooling the head and restarting the cycle
Does aftershave evaporate?
yeh nob head
How does a balance bird work?
It is a small bird toy. It's wings are pointed towards hits head. Which gives it balance. You place your finger on his beak since his head turned down and he balances. These toys are not that complicated to understand.
Why do chickens raise their head when drinking?
So the water can travel through their throat. They don't have whatever it is that humans do to swallow the water.
What bird has a black head?
a Rook is a bird with a black head.
When was The Bird on My Head created?
The Bird on My Head was created in 1958.
Is there anything special about the drinking habits of a deer?
i think they just bend there head down and drink the water
What helps get rid of head aches?
by drinking a glass of water or stop doing anything that requires concentration.
When was A Bird in the Head created?
A Bird in the Head was created on 1946-02-28.
Name of the bird which has legs on his head?
No bird has a foot on its head.
