What is ch h and what is h?

h (physical unit) generally refers to henry (unit of inductance).

Henry is the SI derived unit of inductance, and the symbol is represented as h. The unit was named after the American physicist Joseph Henry.

Introduction

If the current in the circuit changes by 1 ampere per second, an induced electromotive force of 1 volt is generated, at which point the inductance of the circuit is defined as 1 henry.

Henry's dimension in the International System of Units is 1h=1v·a-1·s =1m ·kg·s-2·a-2

The unit was named after the American physicist Joseph Henry.

Commonly used variations

Commonly used units are millihenges (mh) and microhenges (h).

1h=1000mh

1mh=1000μh

h stands for hour, and the full word is hour.

The hour is not the SI base unit of time, but an auxiliary unit of time that is harmonized with the SI base unit. With the exception of leap seconds, an hour is generally equal to 3600 seconds, or 60 minutes, or 1 24 days. The measurement of time in human daily life is generally carried out in hours, for example, the time of day, such as 8 o'clock in the morning is the eighth hour of the day.

The type of time unit

1. Minutes: also known as minutes, is a unit of measurement of time. The English word for minute is minute, which originally meant "tiny" and also meant min. Tick = 15 minutes, word = 5 minutes (usage in southern Fujian and Guangdong).

2. Second: The second is the basic unit of time in the International System of Units, and the symbol is s. It is also sometimes referred to as SEC. by an abbreviation.

SI prefixes are often combined with seconds to make more nuanced divisions, such as ms (milliseconds, thousandths of a second), us (microseconds, millionths of a second), and ns (nanoseconds, billionths of a second).

Although SI prefixes can also be used to amplify time, such as ks (kiloseconds), ms (million seconds), and gs (billion seconds), they are rarely used in practice, and everyone is still accustomed to using the decimal 60 minute, hour, and decimal 24 day as the second extension.

This is a set of symbols for chemical elements – expressions of valence.

1.According to the meaning of the element symbolic representation: macrocosm represents an element; Microscopically represents an atom of this element; If you add a number in front of the element symbol, it only has a micro meaning, not a macro meaning, and cannot represent the element.

From this, it can be seen that: h represents: hydrogen element;

2.+1 in the upper right corner of the H (hydrogen) element symbol indicates that the valency of the chemical element is positive monovalent.

Hour abbreviated as h or h

Hold a pen and create a world that belongs only to you - Xingxi Xuanluo.

h is the unit of measurement of time. h is an abbreviation of the English word "hour", which is a unit of time.

It means hours.

The hour is not the SI base unit of time.

The SI base unit of time is the second), but it is an auxiliary unit of time that is coordinated with the SI base unit.

Unit. Units have different statuses in various fields, and refer to the places where organs, groups or enterprises work; There are also units of calculation in mathematics or physics, generally including: meters (m), kilometers (km), Newton (ton) n, Pa (Ska) pa and other units.

But in Buddhism. In the traditional sense, units refer to quantitative units such as length, mass, time, etc., and there are also special terms such as: instant, instant, snap of the fingers, and moment.

Isomorphic rules.

h is an abbreviation of the English word "hour", which isUnits of timeIt means hours. The hour is not the SI base unit of time.

The SI base unit of time is the second, but it is an auxiliary unit of time that is coordinated with the SI base unit.

Time in a broad sense: when a point is relative to a coordinate system.

When moving, the line or line segment or curve formed by its motion is one of the times at the point at rest relative to that coordinate system. Each point corresponds to multiple times. Relative to a certain time, the faster the point at rest starts to move, the slower the time, when the speed is the same as the point moving in that time, the time stops, and the speed exceeds the point, which is equivalent to going back to the past.

Commonly used units include millisecondsms, minutes, hours, hours, and days.

The unit of time is converted as:

1 second = 1000 milliseconds (ms).

1 millisecond = 1 1,000 seconds(s).

1 second = 1,000,000 microseconds.

s)。1 microsecond = 1 1,000,000 seconds(s).

1 second = 1,000,000,000 nanoseconds.

ns)。1 nanosecond = 1 1,000,000,000 seconds(s).

1 second = 1,000,000,000,000 picoseconds.

ps)。1 picosecond = 1 1,000,000,000,000 seconds(s).

h is the unit of measurement of time.

h is the unit of measurement of time, hour. The hour is not the SI base unit of time.

The SI base unit of time is the second. The second is the basic unit of time in the SI system of units, and the symbol is s. It is also sometimes referred to as SEC. by an abbreviation.

The original meaning of the second in English is to calculate one-sixtieth of an hour (minute) and then one-sixtieth of a minute.

Unit of time: The unit of time is one of the 7 basic units, length, time, mass, and quantity of matter.

Illuminance, current, and (thermodynamics.

Temperature is the seven basic units.

At present, the day and night are 24 hours, and in ancient times it was 12 hours. When Western mechanical clocks were introduced to China, people called the Chinese and Western time points "big time" and "hour" respectively. With the popularization of clocks and watches, people gradually forgot about the "big hour", and the "hour" is still used today.

A century is a hundred years and usually refers to a continuous hundred years. When used to calculate days, the century usually begins from a year that is divisible by 100 or a year thereafter, so the first century runs from 1 AD to 100 AD, while the 20th century runs from 1901 AD to 2000 AD, so 2001 is the first year of the 21st century.

However, the first century has been set at 99 years AD, while the following centuries will be 100 years, and if this definition is followed, 2000 will be the first year of the twenty-first century.

Nm3 h (cubic meters per hour) is the volumetric flow rate of a fluid at standard temperature and pressure (STP). Both the International Association of Pure and Applied Chemistry (IUPAC) and the National Institute of Standards (NIST) stipulate that STP refers to K, and before the 1st century, it was used as a standard for K, 1 bar or bar.

1 m3 h (temperature t2, pressure p2) = 1 k 10 5 t2 (p2*t1) nm3 h

NM3 H is usually called the standard cube, which is the flow rate under the standard return auspicious and accurate state, and M3 H is the flow rate at the working temperature and working pressure.

NM3 h is the standard cubic meter hour, and the conversion relationship between it depends on the specific situation, and the liquid and gas are not the same.