Anemometers are instruments designed to measure wind speed and, in some designs, wind direction. The most common type is the “cup anemometer,” which features three or four cups that rotate when the wind blows. The speed of the rotation is converted into a measurement of wind velocity, typically in knots or kilometers per hour. ANSWER: (B) Wind speed
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Wind speed measurement is vital for everything from airport operations to hurricane tracking. Beyond the traditional cup design, there are “sonic anemometers” that use ultrasound waves to detect wind speed and direction with extreme precision and no moving parts. Another type, the “hot-wire anemometer,” measures how fast a heated wire is cooled by the passing wind. These devices are standard equipment at weather stations worldwide. The data collected helps meteorologists calculate the “wind chill” factor and predict the movement and intensity of weather systems across a geographic region.
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