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Anemometer is used to measure wind direction.

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Hint: An anemometer is likewise a typical climate station instrument. The term 'anemometer' has been derived from the Greek word anemos, which means wind, and is utilized to portray any wind speed instrument utilized in meteorology. The main known description of an anemometer was first given by Leon Battista Alberti in 1450.

Complete step-by-step solution:
Anemometers are important tools for meteorologists, who study weather patterns and predict future weather conditions. This device is also crucial for physicists who study the way air moves.
It is used to determine wind direction.
The Vane Anemometers, Thermal Anemometers, Thermal Anemometers with Velocity / Temperature Profiling, and Cup Anemometers are the most popular anemometers used worldwide.
The normal type of anemometer incorporates cups that are attached with the hand. These arms are connected to a bar that is in a vertical position. At the point when the breeze blows, at that point cups in the anemometer will go to make the bar turn. When the breeze blows quickly, at that point the pole will pivot rapidly. Thus, this device records the revolutions made and calculates the speed with which the wind is blowing. Although the wind speed does not vary much, to get a better and precise calculation the speed is averaged for a number of the observations.

Note: Anemometers, gadgets used to gauge wind speed, by and large fall into three classifications. The least expensive and most generally utilized in natural examinations are cup or propeller anemometers, in which turning cups or a propeller is driven by the breeze. In the last case, the gadget should either be held opposite to the heading of the breeze or be mounted on a vane; for computerized estimations, such gadgets normally measure course just as speed.