Traditional Culture Encyclopedia - Weather forecast - What time is midnight?

What time is midnight?

It should be roughly from 22: 00 p.m. to 4: 00 a.m., the first half of the night from 22: 00 to 24: 00, and the second half of the night from 24: 00 to 4: 00.

This is a physics problem: the pressure at the top of the mountain is P 1, and the pressure at the foot of the mountain is P2. How high is this mountain?

Under normal circumstances, when the air pressure increases by 1.2 m, the air pressure decreases by 1mmHg (about 133Pa).

If the atmospheric pressure in the topic is taken as mmHg, the height of the mountain is h=(P2-P 1)* 12m. If Pa is taken as the unit, the height of the mountain valve is h = [(p2-p1)133] *12m.

How to distinguish morning, morning, afternoon, evening, evening, late night, early morning, and what time is it now?

Generally, the morning refers to the time when people get up at 5-8 o'clock, the morning refers to 8- 12 o'clock, the noon refers to 12- 14 o'clock, and the afternoon refers to17 (or 18).

What time is midnight now?

More-in ancient times, it was regarded as a watch at night, a watch at sea, a watch at home, a watch at home, an ugly watch, and a watch from Yin Shi. In the first half of the night, 1 1 to 1 is "Zi Shi", in the second half of the night, 1 to 3 is "Ugly Shi", in the second half of the night, 3 to 5 is "Yin Shi", 5 to 7 is "Shi Mao" and 7 to 9 is "Chen Shi". Noon 1 to 3 o'clock is inappropriate; Night, untimely; And from 9: 00 to 1 1 is Shihai. The ancient people used the time system of 1 and twelve o'clock. It was used in the Western Zhou Dynasty. In the Han Dynasty, it was named Midnight, Crow, Pingdan, Sunrise, Food Time, Horn, Japan-China, Sundial, Sunset, Dusk and Man's Decision. It is also expressed by the twelve earthly branches, and it is the child time from 23: 00 to 1 at midnight, the ugly time from 1 to 3: 00, and the Yin Shi time from 3: 00 to 5: 00, which are recursive in turn. 2.24-hour system. After the Song Dynasty, every 20 hours were divided into two parts, namely, early childhood, early childhood, early ugliness, and early ugliness ..... In turn, it happened to be 24 hours, which is consistent with the current 24 hours a day. 3. Ten-hour system. Appeared in the pre-Qin period. Five minutes for day and five minutes for night. According to Tian Wenzhi of Sui Shu, the days are morning, evening, noon and evening, and the nights are A, B, C, D and E (later represented by Wu Geng). 4. Five-hour system. Its names are Chen Ming, Yong Ming, Dan Ming, flea (early) food, banquet (late) food, corner, center, less return, shop time, big return, high return, low return, county (hanging) east, dusk, and ding faint. See Huai Nan Zi. Astronomical training. 5, a hundred minutes. That is to say, day and night are divided into a balanced one hundred quarters. Its production is related to the use of missing prints. May have originated in Shang Dynasty. In the Han Dynasty, it was changed to 120, and in the Southern Dynasty, it was changed to 96, 108. After many twists and turns, it was not until the introduction of European astronomical knowledge in the late Ming Dynasty that the reform of 96 engraving books was put forward and made it a formal system in the early Qing Dynasty. 6. Ancient times did not necessarily have strict temporal significance, but there were quite a few common and commonly used names. Generally speaking, sunrise can be called Dan, Zao, Chao and Chen, and sunrise can be called evening, dusk and evening. When the sun is in the middle, it is called noon, noon and pavilion noon, when it is near noon, it is called angle, and when it is west, it is called day and sun. After sunset, it is dusk. After dusk, it's up to people. After a person is appointed, it is midnight (or midnight). After midnight, the chicken crowed. After the cock crow, it is ignorant and dull-this is the time when it is already dawn. The ancients had two meals a day, and the last meal was before sunrise, which was called eating time or eating early; After sundial, before sunset, it is time to have dinner. This time is called "time". Midnight, also known as midnight and midnight: the first hour of twelve o'clock. (23: 00 to 0 1 hour Beijing time). Ugly cock crow, also known as pheasant: the second hour of twelve o'clock. (065438+ 0: 00 to 03: 00 Beijing time). Yin Shiping Dan, also known as Dawn, Dawn and Sundan, etc. Time is the alternation of day and night. (03: 00 to 05: 00 Beijing time). Sunrise in Shi Mao, also known as the beginning of the day, dawn and rising sun, refers to the time when the sun just appeared and Ran Ran first rose. (05: 00 to 07: 00 Beijing time). Eating in the morning is also called breakfast. When the ancients ate in the morning, it was breakfast time (07:00 ~ 09:00 Beijing time). Forty holes, also known as Yu Ri, etc. : near noon, call the corner. (09: 00 to 1 1: 00 Beijing time). Noon, also known as sunrise, noon, etc. : (Beijing time 1 1 to 13). Not long ago, it was also called sunset, sun center and so on. : The sun sets in the west. (Beijing time 13 to Beijing time 15). Feeding at the time of application, also known as day shop, late food and so on. (Beijing time 15 to 17). As time goes by, it is also called sunset, sunset and evening: it means when the sun goes down. (Beijing time 17 to 19). Dusk, also known as sunset, sunset glow, dusk, etc. At this time, the sun has set and the sky will be dark. The world is dark and everything is hazy, so it is called dusk. (Beijing time 19 to Beijing time 2 1). At this time, it was already late at night, and people stopped their activities and had a rest. Calm means quiet. (Beijing time 2 1 hour to 23: 00). Time-the twelve hours of a day in the Chinese zodiac: the first half of the night is 1 1 to 1, the second half is 1 to 3, the second half is 3 to 5, the second half is 5 to 7, and the second half is 8 to 7. ......

What time is it in the middle of the night

The middle of the night should be bounded by 0: 00, morning, 20: 00 to 0: 00, 0: 00 to 3: 00!