The low pressure inside the hurricane is what ultimately produces it. The low pressure in a hurricane pulls air inward. As this air converges it is then force upward. There it becomes warmer than its surroundings and rises due to its own buoyancy.
Winds move toward the center of a hurricane because of the low pressure generated by the upward motion of the air inside it.
With the CG ahead of CP (aka CL), the downward force on the tail creates an upward pitching moment which is opposite of the downward pitching moment caused by the upward force at the CP--these are stabilizing forces. But notice what happens when the CG is behind the CP--both forces now create an upward pitching moment around the CG but there is no counterbalancing downward pitching moment created to stabilize the aircraft.
Because magma is less dense than the surrounding solid rock, it is forced upward toward the surface. When magma reaches the surface and flows from volcanoes, it is called lava.
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Winds move toward the center of a hurricane because of the low pressure generated by the upward motion of the air inside it.
The convection of relatively warm air creates a circular, upward movement, causing a low pressure zone (partial vacuum). Air moves from areas of high pressure to areas of low pressure, like the center of the hurricane.
With the CG ahead of CP (aka CL), the downward force on the tail creates an upward pitching moment which is opposite of the downward pitching moment caused by the upward force at the CP--these are stabilizing forces. But notice what happens when the CG is behind the CP--both forces now create an upward pitching moment around the CG but there is no counterbalancing downward pitching moment created to stabilize the aircraft.
Air in a tornado is rapidly drawn upward. This creates low pressure as more air rushes in to replace it. However this can ever completely fill the pressure deficit until the upward movement stops.
The ship floats because of its large volume which displaces an amount of water that is more than its weight. That creates an upward force called buoyant force which keeps the ship on the surface.
warm air
due to surface tension
There are a few different ways that plateaus can be formed. One way is erosion by water. Another is erosion by glaciers. Magma swelling to the Earth's surface and pushing the crust upward is a third way they can be formed.
As the plane flies through the air, the upper surface of the wing, or aerofoil, is so curved that it creates higher air speed and lower pressure. In other words this lower pressure gives an upwars"lift" to the aerofoil, wheras the air rushing under the aerofoil creates higher air pressure giving an upward "push" to the aerofoil. So both surfaces create upward forces.
Warm moist air over the equator creates a zone of convection.
When a body is immersed in water , due to pressure difference between upper surface and lower surface of the body an unbalanced upward force acts on a body . This unbalanced upward force is called Buoyancy force
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