How is wind speed measured? Detailed answer

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How is wind speed measured? Detailed answer

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How is wind speed measured?

On a windy day, it may seem to you that the wind is blowing at a terrible speed. And then you listen to the weather report and they say, "Wind speed is 10 to 15 miles per hour." It is very easy for us to make mistakes about wind speed. But knowing exactly the speed of the wind is very important for many people, and therefore there are scientific ways to determine this speed.

The first instrument for measuring wind speed was invented in 1667 by the Englishman Robert Hook. The device is called anemometer.

There are many types of anemometers, but the most common one has several aluminum cups on the axis. It is fixed freely, and the stronger the wind, the faster the cups rotate on the axis. By counting the number of revolutions that the cups make in a certain time, you can calculate the wind speed.

When people began to fly, it became necessary to measure wind speeds at high altitudes. To do this, balloons were launched, and they were monitored with the help of special optical instruments called "theodolites". But when the clouds covered the balls, observation became impossible.

Weather radar was invented in 1941. And now the radar can observe the ball even through the clouds and measure the wind speed in the upper atmosphere. Since ancient times, people have also been interested in which way the wind blows, and around 900 AD. e. weather vanes were placed on the spiers of churches to show the direction of the wind.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

Why are London cops called bobbies?

The idea of organizing a police service to protect the city originated in London. In 1737, a law was passed on the organization of a police service of 68 people. But the city grew, the property of the citizens increased, and robberies and robberies were no longer controllable in London.

In 1829, Sir Robert Peel organized the London Police, headquartered at Scotland Yard. Recruits wore top hats and tailcoats. Peel's newly created service was numerically larger, better trained, more disciplined than any previous police service. Robbery in London was soon stopped, but they moved to other areas. As a result, in 1835 all cities and towns were ordered to organize their own police departments. And from the short name of Sir Robert Peel - Bob - the common name of the English policemen arose.

In 1830, a group of specialists from the city of New York studied the police system in Great Britain. As a result, in 1844, New York became the first city in the United States to establish a XNUMX-hour police service similar to that proposed by Peel. And other cities followed the example of New York.

Why is an American policeman called a "cop" or "copper"? Some believe the name comes from the eight-pointed copper star once worn by New York police officers. Copper sounds exactly like this in English: "copper". Others believe that "cop" is the first letters of the English phrase "patrolman".

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