Air pressure decreases with altitude. The combined weight of air molecules at increasing altitude decreases. Air pressure is greatest at the Earth's surface, because the surface air molecules bear the combined weight of all the air molecules above.Know More
As altitude increases, individual air molecules can occupy a greater volume of the atmosphere. Because air molecules can achieve increasing distances from one another with increasing altitudes, the air can be described as being thinner, or less dense.
For example, aircraft flying at higher altitudes can face control issues because the air becomes increasingly rarefied. The air molecules can reach such a low density that aircraft control surfaces, such as the wings, ailerons and rudder, can become ineffective.Learn more about Particle Physics
Linear expansivity is a material's tendency to lengthen in response to an increase in temperature. Linear expansivity is a type of thermal expansion. It is described by a fraction that represents the fractional increase in length of a thin beam of a material exposed to a temperature increase of one degree Celsius. The fraction is called the linear expansion coefficient of the material.Full Answer >
As altitude increases, the air pressure decreases. The surface of the earth is the bottom of an ocean of air. The layers on top increase pressure so that at sea level a body is under 14.7 pounds of pressure per square inch. Moving up in altitude decreases weight of air that causes the pressure. At 18,000 feet, the pressure decreases to 7.4 pounds of pressure per square inch.Full Answer >
Altitude sickness can occur following a drop in air pressure at altitudes above 8,000 feet. Altitude sickness usually only occurs when a person has not been gradually exposed or acclimatized to the low air pressure in advance, according to Medical News Today.Full Answer >
Sinus pressure develops when the sinuses become inflamed, mucus is unable to drain normally, and the sinus passages narrow due to the increase in mucus. Often this increased pressure leads to sinus headaches, according to MedicineNet.com.Full Answer >