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Online Timer

StopWatches have long been known to man. At first, online timer role was played by the sun, then the water, sand and even fire. However, neither of which the accuracy of such measurements, however. These measurements are given the error from a few minutes to an hour. The situation is somewhat rectified with the advent of the mechanical clock. First there was the opportunity to learn the exact time to the minute, with the emergence of a second hand - second. But still this was far from the hour of the watch. They are, for example, could not stop and start at any moment. And the accuracy was far from ideal. References to the first "real" stopwatch appear in the late 17th early 18th centuries. How many can tell, it was almost the same instruments that were used until the mid-XX century, that is, the mechanical stopwatches. Since the beginning of the active development of the electronics appear online stopwatch.

    In research laboratories
    In the factory laboratories
    In teaching laboratories of universities, colleges and schools
    In sports
    In the military ( online timer of the torpedo, the definition of the moment of defeat torpedo goal)

Primarily used in sports stopwatch to accurately measure the length of time it took for a certain athlete exercises such as sprinting or swimming.

    At home (in the kitchen, to determine when cooking food)

Another interesting application of the stopwatch is in 60's. For lack of a modern radar traffic police employee with a stopwatch measured the time of the car between the two posts and it calculated the vehicle speed
The first press of the button includes a stopwatch. A second click on the button stops the stopwatch. A third press of the button sets the stopwatch hands to the initial zero. The rotation of the same button starts spring stopwatch.

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