A Darth Vader on the Gatwick Express. Darth Vader (plural Darth Vaders) A powerful individual or force, particularly one that is seen as malevolent, dominating and threatening. Robert Whiting, The Meaning of Ichiro: The New Wave from Japan and the Transformation of Our National Pastime (2004) p. 130:
exists and is an alternate of . Wind is a horizontal flow of air from higher pressure to lower pressure the force that generates wind is called the Pressure-Gradient Force. Wind is a horizontal flow of air from higher pressure to lower pressure the force that generates wind is called the Pressure-Gradient Force.
Tidal force. The tidal force is a force that is the secondary effect of the force of gravity; it is responsible for the phenomenon of tides. It arises because the gravitational force exerted by one body on another is not constant across it: the nearest side is attracted more strongly than the farthest side. Thus, the tidal force is differential.