The motion of air relative to the earth's surface.
The motion of air currents.
Materials or phenomena which can provide energy directly or via conversion.
The use of wings or wing-like appendages to remain aloft and move through the air.
A system using beamed and reflected radio signals to and from an object in such a way that range, bearing, and other characteristics of the object may be determined.
Units that convert some other form of energy into electrical energy.
Forms of energy that are constantly and rapidly renewed by natural processes such as solar, ocean wave, and wind energy. (from McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
The state of the ATMOSPHERE over minutes to months.
Devices that control the supply of electric current for running electrical equipment.