I. Meaning of Capital H
1.h in chemistry, a chemical symbol representing elemental hydrogen, or 1 hydrogen atom, or a substance composed of atoms.
Greek hud &；; Ocircr (water) gennen (cause) means a substance that "produces water".
In Chinese, "hydrogen" was originally called "light gas" and "hydrogen" is a new pictophonetic word.
Specific analysis;
Hydrogen is a chemical element with symbol H, ranking first in the periodic table of elements. Hydrogen usually exists in the form of hydrogen, which is colorless, tasteless and odorless. It is a highly flammable gas composed of diatomic molecules, and hydrogen is the lightest gas. Hydrogen is used to treat diseases in medicine. Japanese follows the original meaning of Greek and is called "water element".
2. In geometry, lowercase h stands for height.
3. In Hubble's law, h stands for Hubble constant.
4. In electromagnetism, H stands for magnetic field strength, and vector refers to the difference between the quotient of magnetic induction strength B and magnetic constant at a given point and magnetization strength M. In vacuum, it is the quotient of magnetic induction strength B and magnetic constant.
In quantum physics, it means "Planck constant", and the lowercase h stands for Planck constant. (its value is about 6.626196×10-34j s) Planck constant is a physical constant, which is recorded as h to describe the quantum size. It plays an important role in quantum mechanics. When Max Planck studied the law of thermal radiation of objects in 1900, he found that as long as the emission and absorption of electromagnetic waves were not continuous, but one after another, the calculated results could be consistent with the experimental results.
6. In baseball technical statistics, H stands for the number of hits. H and H are hits, the sum of hits, and the sum of hits of all the team members in this game. Hitting is a term in baseball and softball, which refers to the situation that the batter throws the ball out of the pitcher and hits it out of bounds, so that the batter can reach first base safely at least. Hits can be divided into first base hits, second base hits, third base hits and home runs. A first base hit refers to a situation in which a batter successfully reaches first base after hitting a ball. Similarly, a second base hit is when the batter reaches second base safely after hitting the ball.
7. In the field of machining, H is the accuracy grade. H is the code of basic deviation. Capitalized as a hole, H indicates that the hole can only be large but not small. As for how many microns, check the tolerance level. Lowercase is the axis, and H indicates that the outer diameter can only be small but not large. As for how small it is, we should also check the tolerance level. .
8. In the mobile communication network, it stands for "HSPDA wireless service" and is usually displayed on the status bar of mobile devices.
8.h stands for obscenity and pornography on the Internet. The original meaning is the abbreviation of "Hentai(へんたい) in Japanese, that is, metamorphosis. Because the pornographic game is "Hentai-Game", it is named.
9. Alphabetic symbols
H (capital); H (lowercase) is the eighth letter in the Latin alphabet. Probably because of the symbol of the fence, it appeared in Semitic writing very early-Sinai Peninsula in about 1500 BC.
10.h, the abbreviation of "yellow" on the network. "On the Internet, H comes from the Japanese proverb" ェッチ ",which means sexy and erotic. It can be extended to describe all large-scale and welfare content. Sometimes it is also synonymous with adult pornography, indicating a restricted level. Close to the work port. The word source H comes from the Japanese proverb "ェッチ" and describes lewdness, lewdness or sexual behavior. China netizens think it is the first letter of the word "yellow".
Second, the meaning of lowercase h.
1. In the SI prefix, h stands for "hour". An hour is a unit of time. The hour is not the basic unit of the International System of Time Units (the basic unit of the International System of Time Units is sec(s), but an auxiliary unit of time coordinated with the basic unit of the International System of Units, 1 hour hr (h) = 60min min (m) = 3600sec (s).
2. International Phonetic Alphabet: unvoiced glottal fricative, sometimes called "unvoiced transitional sound" and usually called "unvoiced fricative sound", is a common sound in spoken language, most of which are regarded as consonants, but sometimes used as vowels or even sounds in between. What is the symbol representing this sound in the International Phonetic Alphabet? h？ And in the X-SAMPA phonetic alphabet? h？ .
3. The hardness of the pencil is the lead content.
H, B and HB marked on the pencil represent the hardness of the pencil, which is also historical. Let's see:
Pencil lead produced by different clay proportions in graphite has different hardness and color. "H" is the initials of the English word "Hard", which stands for clay and the hardness of pencil lead.
The larger the number before "h" (such as 6H), the harder the pencil lead, that is, the greater the proportion of clay mixed with graphite in the refill, and the lighter the color of the written text, which is often used for copying.
"B" is the initials of the English word "Black", which stands for graphite and is used to indicate the softness of pencil lead and the obvious degree of writing. With "6B" as the softest and blackest handwriting, it is often used in painting. The label of ordinary pencils is generally "HB", and the label of pencils used to paint answer sheets in exams is generally "2B".