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Human flight has become a tired fact of modern life. At any given moment, roughly 5,000 airplanes crisscross the skies above the United States alone, amounting to an estimated 64 million commercial and private takeoffs every year [source: NATCA]. Consider the rest of the world's flight activity, and the grand total is incalculable.
It is easy to take the physics of flight for granted, as well as the ways in which we exploit them to achieve flight. We often glimpse a plane in the sky with no greater understanding of the principles involved than a caveman.
How do these heavy machines take to the air? To answer that question, we have to enter the world of fluid mechanics.
Physicists classify both liquids and gases as fluids, based on how they flow. Even though air, water and pancake syrup may seem like very different substances, they all conform to the same set of mathematical relationships. In fact, basic aerodynamic tests are sometimes performed underwater. To put it simply, a salmon essentially flies through the sea, and a pelican swims through the air.
The core of the matter is this: Even a clear sky isn't empty. Our atmosphere is a massive fluid layer, and the right application of physics makes it possible for humans to traverse it.
In this article, we'll walk through the basic principles of aviation and the various forces at work in any given flight.
It is easy to take the physics of flight for granted, as well as the ways in which we exploit them to achieve flight. We often glimpse a plane in the sky with no greater understanding of the principles involved than a caveman.
How do these heavy machines take to the air? To answer that question, we have to enter the world of fluid mechanics.
Physicists classify both liquids and gases as fluids, based on how they flow. Even though air, water and pancake syrup may seem like very different substances, they all conform to the same set of mathematical relationships. In fact, basic aerodynamic tests are sometimes performed underwater. To put it simply, a salmon essentially flies through the sea, and a pelican swims through the air.
The core of the matter is this: Even a clear sky isn't empty. Our atmosphere is a massive fluid layer, and the right application of physics makes it possible for humans to traverse it.
In this article, we'll walk through the basic principles of aviation and the various forces at work in any given flight.
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science mix
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Nose Bleed Prevention Tips
- USE A HUMIDIFIER
If you live in a dry climate use a humidifier year round, in other climates run a humdifier during the winter months when forced heat from your furnace is creating a dry atmosphere (especially at night time while you are sleeping).
- USE SALINE SPRAY
Saline (salt water) spray for your nose three to four times daily helps reduce drying out of the mucus membranes in your nose and help prevent nose bleeds.
Herbal Treatments and Precautions for Nose Bleeds
- Astringent herbs can be used topically to decrease or eliminate bleeding.
- Agrimony
- Yarrow
- Witch Hazel
- Bilberry herb decreases the fragility of small blood vessels.
- Rescue Remedy is recommended for onset of trauma due to a nose bleed for its calming effect to slow down the heart rate. Slowing down the heart rate will slow the flow of the bleeding.
- Stop using Ginkgo Biloba if you are experiencing nose bleeds, this popular herb used for mental alertness can increase the risk of bleeding.
Recommended Nutritional Supplements
- VITAMIN C
Deficiency in Vitamin C is associated with epistaxis. - VITAMIN K
Bleeding problems can occur with a vitamin K deficiency. Vitamin K helps the blood clotting process. Adequate amounts of vitamin K can be assured by consuming plenty of fruits and vegetables. - VITAMIN E
Vitamin E squeezed from a gel cap can be applied inside the nose as a lubricant to dry airways. However, Vitamin E is more likely to increase the risk of bleeding in patients on anticoagulant medications. - ZINC
Natural wound healer. Low zinc levels can impair wound healing