Whether the day is 12 hours or 24 hours

The so-called day means a day, and a day is equivalent to 24 hours. However, it also depends on the special context of the context, and the expression in the context is different.

How to recover the fading clothes.

First of all, you can add vinegar to the water, or soak it in beer.

In fact, the clothes that will fade should be put into the salt water in advance for color fixing, in the usual printing and dyeing factory dyeing process, in fact, we have to add salt, salt itself is for the dyeing of cotton fabrics to promote dyeing, in direct dye.

In the process, salt has a very obvious effect on dyeing.

So we buy the clothes back and soak them in salt water, its color fastness will be better, and when washing, it is best to use light salt water.

Soak it first, which is similar to the dyeing process in a factory, so that some of the floating color will be re-dyed on the garment, so that the next time you wear it, there will be no fading.

If the color of the clothes fades after washing, you need to consider whether the clothes themselves fade, or whether the detergent hurts the clothes and thus makes the clothes fade. If it is the former, on the one hand, the color fixation of the clothes is not good, this dye is also harmful to the human body, if it smells of formaldehyde (very pungent), it is recommended that you choose according to the degree of fading of the clothes.

Actually, I think there are many meanings of this kind of text, a whole day is 24 hours, a day and a night are day and night with me for 24 hours.

A day consists of a day and a night, so a day is 24 hours. A day is a day, and a day is a day.

A day must refer to 24 hours, a day is a day, a day is a day, of course 24 hours.

Hello, a day is generally counted as 24 hours.

Unless otherwise specified, a day is 24 hours, not 12 hours. If we say one day and one night, then one day here refers to 12 hours, and one night is also 12 hours. We also know that the day is divided into day and night, so why is there a situation of day and night, instead of one being both day, or always being in a state of night?

This is because the earth we are in will rotate around the axis of the earth and produce two states, the earth rotates.

Relative to the sun, it rotates once every 24 hours, which is why it is 24 hours a day, and then because the distance of the rotation from the equator will always change, so there are two states: day and night.

24 hours

The day is 24 hours. Start at zero point zero. It is one o'clock at night from 0:00 to 1:00 at night.

It is also the third watch of the ancient people to record the time, and it is still the son of the two zodiac signs of the ten tongyin imitations. Four o'clock in the morning is the fourth watch day, and it is also the ugly hour of the zodiac. At 12:12 p.m., it was recorded as 12 a.m.

At 12 o'clock in the evening, it was recorded as 12pm.

Why is the day 24 hours

The 24 hours of a day are mainly determined according to the rotation and rotation of the earth, the rotation of the earth is almost 24 hours, the earth's rotation around the earth's axis from west to east is called rotation, and the earth's rotation is 24 hours a day and night. The 24 hours were originally set by the Egyptians. It is also for the convenience of people's travel and life, the scientific community has artificially uniformly stipulated a 24-hour day.

However, some British astronomers believe that as the Earth's rotation speed becomes slower and slower, there may be 25 hours a day in the future, but this statement remains to be verified.

Twelve hours

Midnight, also known as midnight, midnight: the first hour of the twelve. (23:00 to 01:00 Beijing time).

Ugly time] rooster crow, also known as wild chicken: the second hour of the twelve. (01:00 a.m. to 03:00 a.m. Beijing time).

Yinshi] Pingdan, also known as dawn, morning, day, etc.: Shi is the time of the alternation of night and day. (03:00 to 05:00 Beijing time).

Sunrise, also known as the beginning of the sun, dawn, rising sun, etc.: refers to the time when the sun has just appeared and is rising. (05:00 to 07:00 Beijing time).

Chenshi] food time, also known as morning food, etc.: the time of the ancients "morning food" is also the time to eat breakfast, (Beijing time 07 to 09 o'clock).

巳时] Yuzhong, also known as Riyu, etc.: When it is close to noon, it is called Yuzhong. (09 a.m. to 11 a.m. Beijing time).

Noon] midday, also known as sunday, noon, etc.: (11 a.m. to 13 p.m. Beijing time).

Untime] Sunset, also known as sunset, sunset, etc.: the sun is westerly for the sunset. (1 p.m. to 3 p.m. Beijing time).

Shen Shi] feeding time, also known as day shop, evening food, etc.: (15 to 17 o'clock Beijing time).

Unitary time] sunset, also known as sunset, sunset, evening: It means when the sun sets. (From 5 p.m. to 7 p.m. Beijing time).

Dusk, also known as sunset, sunset, sunset, etc.: At this time, the sun has set, and the sky will be dark before it gets dark. The sky and the earth are dim, and everything is hazy, so it is called dusk. (7 p.m. to 9 p.m. Beijing time).

At this time, the night is deep, and people have stopped their activities and slept peacefully. People are quiet, that is, people are quiet. (9 p.m. to 11 p.m. Beijing time).