As air molecules move over and under the wings of an airplane, the pressure decreases above the wings and increases below them, creating lift. This difference in pressure generates an upward force that allows the airplane to rise into the air. The phenomenon is explained by Bernoulli's principle, which states that faster-moving air has lower pressure.
Lift
Lift
Gas pressure is caused by gas molecules zipping around and bumping into things. These molecules have kinetic energy defined a 1/2 the mass times the velocity squared. Increasing temperature increases the speed that the molecules zip around - so the pressure increases (hot soda can for example has more pressure than a cold one).
Temperature and altitude are two qualities that affect atmospheric pressure. As temperature increases, air molecules move faster and create higher pressure. At higher altitudes, there are fewer air molecules above, leading to lower pressure.
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Bernoulli's principle states that as air speed increases, air pressure decreases. This principle is applied in airplane wings, which are designed to create a pressure difference between the upper and lower surfaces. This pressure difference generates lift, allowing the airplane to stay in the air.
The molecules that create the most pressure are typically gases, particularly those with high molecular weights and high kinetic energy. For example, gases like carbon dioxide (CO2) and sulfur hexafluoride (SF6) can exert significant pressure in a confined space due to their higher molecular mass compared to lighter gases such as helium or hydrogen. Additionally, increasing the temperature of a gas increases the kinetic energy of its molecules, leading to greater pressure.
Heat affect the gasses' molecules and atoms which make it spread and expand which increases the volume. If the volume is constant as in a closed system then the pressure will increase and decrease along with temperature in a extrusive relation.
Gas molecules collide with the container walls.
Fluids create pressure because the molecules in a fluid are constantly moving and colliding with each other and the walls of their container. This collision of molecules creates a force that is exerted evenly in all directions, resulting in pressure within the fluid.
Gas pressure is caused by the molecules of gas striking the walls of a container, or in the case of Earth's atmosphere, the molecules of air hitting the earth. In a vacuum, there are no gas molecules. No molecules, no pressure.
The number of collisions with enough energy to react increases.