#SET TIMER FOR 25 MIN FREE#

Exercise and want to dose physical activity.The timer is sure to come in handy when you: It is difficult to list all the situations in which it is necessary to know the exact time spent and at the same time not be distracted by observing the numbers on the dial or electronic scoreboard. The countdown starts after the timer starts. With the online timer, you can keep track of time without installing additional software. Add the timer to your bookmarks, and it will always be at hand when you need it.

#SET TIMER FOR 25 MIN FREE#

The sound is generated at the same time as the lightning strike, but it takes time for it to reach the ears.ДЄn accurate, simple and free timer is a good trainer for anyone who already understands the value of time. If three seconds pass between a flash of lightning and a discharge of thunder, the thunderstorm is a kilometer away.

The thunderstorm timer will help you understand how far away the epicenter is.

While a ship with a speed of 99% of the speed of light flies from Earth to Sirius and back for 2.5 years, 17 years pass on our planet.

The faster we move, the slower time flows.

Light from another closest star, Proxima Centauri, has been coming to us for 4 years. So, we see the Sun as it was 8 minutes and 20 seconds ago.

We see only the past - the speed of light creates delays of everything visible.

But even this value is not constant, many factors affect the rotation speed, for example, the attraction of the moon. In fact, a day consists of 23 hours, 56 minutes, and 4.2 seconds.

It is generally accepted that there are 24 hours in a day - during this time the Earth rotates around its axis.

The International Earth Rotation Service adds the 'leap' second on June 30 or December 31 to bring Earth time into exact correspondence with the Sun.

Sometimes there are 61 seconds in a minute.

At the end of the last century, an electronic timer naturally arose - an accurate device that is used today in thousands of different devices. The rapid scientific progress of the twentieth century did not pass by the clock. In 1821, the French master Nicolas Mathieu Rieussec created the first publicly available chronograph, an order for which came from King Louis XVIII (Louis XVIII). The first mechanical timer in 1816 was invented by Louis Moinet. In order not to miss a single drop of time, the watchmakers constantly improved their devices. From that moment on, the price of a minute only grew, and in 1670 the English watchmaker William Clement built a stopwatch. The familiar mechanical watch with hands appeared in China in 725 AD, designed by the masters Yixing (иЎЊ) and Liang Lingzan (жўЃ д»¤ з“љ). Only a thousand years remained until the invention of the mechanical movement. The hourglass was invented around the 3rd century BC in the Middle East and Ancient Greece. Chinese and Indian water timers acted the other way around - an empty hemisphere with a small hole at the bottom, floating in the pool, gradually filled with water.

In Babylon, Ancient Egypt, and Ancient Greece, water slowly flowed out of a filled vessel. The water clock helped people count the hours and minutes for a long time - the clepsydras heard the speeches of ancient Roman orators and helped the kings to be punctual. From the glass cylinder, water flowed out in a thin stream, perhaps then the expression 'time is up' appeared. In the Middle Ages, time was measured by marks on candles.Д¬lepsydras or water clocks appeared about half a millennium later than the fire ones, they were invented by the ancient Babylonians and Egyptians. After the invention of glass, the functions of the fire clock were transferred to lamps with marked divisions - minutes and hours ran away along with the burnt out oil. When the stick decayed to the mark, the ringing of the ball that fell on the stand was heard. Metal balls were often attached to the marks. Sticks or spirals with marks were made from the mixture. The dry wood was ground into powder and mixed with incense. About 3000 years ago they were used in China, Japan, India, Greece and Persia.

The ancient ancestors of timers are fire clocks. After the specified time has elapsed, an audible signal sounds. Timer is a device that measures a specified time interval from the moment of start.

Set timer for 25 min