They altered the deal on Vader's helmet (jpeg & gif comparison) (self.StarWars) submitted 4 months ago by pldkn. In a previous Japanese trailer, we could see Darth's menacing pose as he turns to the camera - but mostly I saw his awkward neck situation. In a new Chinese trailer, they show the same shot again, but this time it's obviously edited. No more weird neck situation, much more sinister looking indeed.
Air parcels, in a horizontal air pressure gradient, flows in a direction to eliminate the pressure gradient. The force that causes air parcels to move as the consequence of an air pressure gradient is known as the pressure gradient force and always acts directly perpendicular to isobars and toward lowest pressure.
The forces that govern wind velocity include the pressure gradient force, the Coriolis âforceâ (an apparent force due to Earthâs rotation) and friction. The pressure gradient force is what causes the wind to blow. In the atmosphere, pressure differences are a result of changes in density due to warm and cold air. When warm and cold air is close together, we have a pressure gradient.