One Answer

  1. The first case is not quite a smooth change in the pitch of the aircraft (the direction of the nose of the aircraft up and down) towards the ground, combined with inertia. The second case is the properties of air as air pits. Air and gases are very similar in their dynamics to liquids. When the plane abruptly falls from denser areas to less dense ones, its lifting force is slightly reduced for a short time and the plane literally falls by several centimeters, and passengers due to inertia find themselves in zero gravity. Warm air is less dense than cold air. If the speed of its upward flow is not enough to compensate for the transition, this phenomenon occurs. If the flow rate is sufficient, then the pit occurs when moving back to the cold region of air or simply leaving the ascending air flow. There are also micro-bursts of wind and descending air flows, and when weightlessness gets into them, it turns out to be more intense. Warm areas appear around cities in the form of a conditional hemisphere with an upward flow from the top. Also, if the sun shines intensely on a dark surface, a stream of warm air appears above it. Streams can reach several kilometers in height, where they already cool down and die down, forming fog and clouds.

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