The meaning of a second How is a second defined

To God, one second equals 10,000 years. For bacteria, a second can take up most of their lives. A second is a period of time, and a moment can be seen as a moment, and I don't think we can mix them up.

A second means a lot and could be your whole life. For example, one second before you die, you recall what you have experienced in this life. One second can change your life, for example, if you arrive one second late, don't catch the bus, and therefore be late, and lose an important opportunity.

A second is a unit that makes up time in the space-time we are in, but it should not be the smallest unit. It is precisely because of such a fragment that we have our lives.

A second, no certainty, just an instant; Grasp it, it's eternity. The meaning of a second is big, and without it, there would be no generation. Immutable in terms of eternity; It's small and small, casually, in the blink of an eye.

But in that moment, everything is changing, and it's not up to you. From this point of view, the weight of one second is not light.

It is both instantaneous and eternal, and at the same time it is a fundamental element that makes up the concept of the development of time.

The meaning of a second is time and history or getting closer to death, and you are almost at the end of the game.

Different angles have different answers, which is very meaningful!

It's just in the sense of reason.

It's both instant and eternal.

A second doesn't make sense.

What makes sense is what happened in that second, what you did.

The pendulum length of the second pendulum was proposed by the Royal Society of London as a unit of length in 1660. On the surface of the earth, a single pendulum about a centimeter long, a swing or a half-cycle, and the time for a swing without repetition is about one second.

The first people used the earth's rotational motion to measure time, and the basic unit was the mean solar day. At the end of the 19th century, one of the 86,400 percent of a solar day was used as one second, called the universal time second.

Due to the irregular changes in the rotation of the earth and the long-term slowing down, the world time changes year by year and cannot be kept constant. Therefore, the accuracy of the reproduction second by this definition can only be 100 millionths of a second.

There are 60 seconds in a minute, and one second is equal to 1 60 in a minute.

Minutes is a tall Chinese word for a bright ruler, and the minute key indicates the length of time, one minute is equal to 60 seconds.

You can blink in one second, you can organize your image in one minute, and you can finish a game in an hour. This seemingly short moment of stupidity is rarely cherished. You can read an article of five or six hundred words in one minute, Brother Pi can browse a copy of more than 40 editions of **, watch 5-10 wonderful advertising videos, run 400 meters, and do more than 20 sit-ups ......When I wake up in the morning, I spend one minute dressing my pants, one minute arranging the quilt, one minute brushing my teeth, and one minute washing my face.

See, in just four minutes, we can do what we would have done in ten minutes before. Even though a minute is only 60 seconds, our lives are made up of countless minutes, and if we cherish each minute and learn to break it down, many great things can be done in many minutes.

The concept of one minute.

What is the concept of a minute? You can read a short paragraph of a book in a minute, solve a math problem, play a piano, write a blog post or write a short paragraph, and if you type slowly, you can type a dozen words!

Inscription. There are a few students in the class who are good at English, how can their English be so good? According to my observation, it is because they are waiting for the time of the people, and as long as they have a little time to do something, they will take out the booklet in their pockets and memorize the words for a while, without delaying for a minute.

Einstein's success is also due to the fact that he can solve a math problem even when he waits for someone, and a great scientist can find time to solve a math problem, isn't it because they will use their time?

Some people always complain that they have little time, no free time, no time to read, in fact, time slips away before you know it. Today, I did a little experiment.

In the morning, my mother just called me, I jumped up, I will no longer lie in bed as before, quickly get dressed, make the bed, but wash can not be less than five minutes (brushing teeth takes three minutes), sit on the sofa and read my "Daily Recitation", finished reading, but the meal is not ready, in the usual, I have not finished reading the meal has been ready, but it is really time-saving!

I don't want to waste my time, otherwise, wouldn't I let the time go in vain? I just got to practice on the piano bench, and even though I only practiced for 10 minutes, I was able to squeeze out a little bit of time!

At noon, my stupid mother and I went to the Rebecca Hotel to eat happy noodles, and before the meal started, I started to read the book, reading one after another, but it was only about ten minutes! It's a success if I can save a little time, no matter how much or too little, because if you can save a little time every day, a week is a lot of money.

So a person measured in minutes will have 59 minutes more time than someone measured in hours.

A minute of time can not be ignored, so we must save every minute and every second, you know: an inch of time is an inch of gold, and an inch of gold is difficult to buy an inch of time.

The details are as follows:

You can take a breath in a second, you can look at someone you like, you can hug your parents, you can write a word, you can close your eyes, you can yawn, you can pick up something, you can take a step, you can run 10 meters, you can turn around.

The unit of time, the second (second), is the basic unit of time in the International System of Units and the symbol is s. It is sometimes referred to as SEC by the English abbreviation.

The day is divided into 24 equal portions, and each portion is still represented by "hour". At this time, "one hour" is one hour now, which is only half of the "one hour" or "one hour" in the past (after the Han Dynasty), and the time referred to is shortened.

Then, the hour is divided into 60 equal parts, and the time of each part is called 1 minute, and the time of 1 minute is divided into 60 equal parts, and the time of each part is called 1 second. In this way, the hours, minutes, and seconds are determined.

Ancient Chinese timekeeping methods:

1. Twelve-hour system.

It has been used in the Western Zhou Dynasty, and in the Han Dynasty, it was named in the middle of the night, the rooster crows, the pingdan, the sunrise, the eclipse time, the middle of the day, the middle of the day, the sun, the sunset, the sunset, the dusk, and the people. It is also expressed by the twelve earthly branches, taking 23 o'clock to 1 o'clock in the middle of the night as the sub-time, 1 to 3 o'clock as the ugly time, and 3 to 5 o'clock as the yin time, and then pushing it in turn.

2. Twenty-four hour system.

After the Song Dynasty, each hour in the twenty hours was divided into two parts: the beginning and the positive, so that the sub-beginning, the sub-positive, the ugly beginning, and the ugly positive. In turn, it is exactly twenty-four hours, which is the same as the twenty-four hours of the present day.

3. Ten hour system.

Appeared in the pre-Qin period, five minutes each day and night. According to the "Slippery Imitation Seepage Sui Book. Astronomical Chronicles", the day is the morning, Yu, the middle, the sun, the evening, and the night is A, B, XINZHI C, D, and E (later represented by five watches).

1 in 86,400 of the time it takes for the Earth to rotate in one revolution.

The switch that turns on the light is one second.

The second itself is an arbitrary human process, and the second we are talking about today is based on the sociology of the universe, because before you say a second to a human on Earth, he will know how long it has been. But there's a problem with when you talk to an alien (let's say any) one second of Earth time, guess what's going to happen, it's mostly someone late or you're late. Therefore, it is not correct for us to say that the time represented by one second is in the cosmic society.

Here's my guess the definition of a second.

First of all, there are only a few things in the universe that are constant, in the cosmic environment of the vacuum, the first thing that comes to mind is the speed of light, how to define the speed of light, then we have to define gravity first. A black hole is a strong gravitational field that can distort light, which is defined by the value of the speed of light itself, so how much gravitational force the light begins to distort is the basis for the definition of the speed of light. And then at this critical point, the time it takes for light to travel through the diameter of this gravitational field is defined as one second, what do you think?

In addition, the current definition of 0 degrees Celsius by Lou is meaningless in the sociology of the universe, and if we define 0 degrees, we have to run to the universe to define it, that is, the temperature in the interstellar vacuum can be defined as 0 degrees, and that temperature is also constant in the universe.

By analogy, some of the things defined in our human universe have to be put into the universe to define that it makes sense, because these things such as one second, one kilogram, one meter, and 0 degrees are necessary things for society, so there must be a definition recognized by the whole universe civilization in the universe society, and our small human beings can only define these values by the global environment in which they are located, which feels so superficial.

If you want to dig deeper, of course, I guess you also thought that because in our universe, the speed of light is the maximum number of degrees, and the speed of light is not in the universe we are in, so in the universal unity, we have to find something that can be constant in the universe in all dimensions as a reference. What is it, what can run through all dimensions of the universe unchanged, that is not something we can imagine.

Therefore, we can only define these basic things very superficially, such as one second, one kg, and 0 degrees, because there is no way to define them correctly, if one day there is communication with an alien civilization, maybe our common sense may also be a burden on our thoughts and actions, which is really a tragedy for all mankind.

The definition of the second itself is one 86,400th of a day, and this unit of time is artificially divided and meaningless. Both the Earth's rotation or the Earth's revolution definition and the cesium atom definition are only aimed at fixing the length of a second. As an internationally recognized definition, if you must think that it is invalid, you can only hope to see your masterpiece, explain how it is invalid, and how it can be effectively defined, and you will definitely win the award!