Time - seconds, minutes, hours, years...

Time is perceived by us in different ways. Often events that last seconds, seem like an eternity and vice versa. Statistician S. Sandow tried to introduce some order into our idea of time - he collected and published a book, which included over 3,5 thousand data on the duration of various processes and phenomena. Here are some of them:

A time is perceived by us in different ways

0,001 seconds lasts a flash of lightning, 0,005 seconds is spent by a bee on one wing flap, for 0,1 second the spacecraft flies 1 km, for 1,25 seconds passes the distance from the Earth to the Moon the light signal, 8 seconds it is necessary to hold on the back of the mustang or bull to the participant rodeo, for 1 minute an experienced lacemaker can tie 100 loops, after 21 minutes a person's hunger disappears after he has eaten a piece of bread, the longest dreams we "scan" in 15 minutes, 1 hour lives a butterfly-one-day, 12 hours can continuously (during this time it executes 4320 "songs"), for 1 year, Africa and South America are separated from each other by 5 centimeters, 3 years are allotted to the Puman (Borneo) three-year-old girls are declared adults, for 15 years, children can witness 18 thousand murders occurring on television, in 22 years a person forgets the names and faces of almost all of his classmates, 45 years on average live a horse, 250 million years is necessary for the formation of oil in the Earth's crust, after 10 billion years, the extinction of Sun.

But, what is time? Time is a form of physical and mental processes. One of the basic concepts of philosophy and physics, a measure of the duration of the existence of all objects, as well as one of the coordinates of a single space-time.

Time can be characterized by one-pointedness. Also time is determined in a certain frame of reference, which can be either uneven (human pulse) or even. A uniform reference reference frame is selected "by definition", earlier, for example, it was associated with the movement of bodies Solar system (ephemeris time), and at the present time such is locally considered atomic time, and the standard of the second is 9192631770 radiation periods corresponding to the transition between two hyperfine levels of the ground state of the cesium-133 atom in the absence of perturbation external fields.