# Measurement units length and distance

## Contents

- 1 units measure length and distance 1.1 metric system 1.1.1 The units of measure lengths and microscopic objects 1.1.2 units of measure objects or relatively large distances 1.2 English and American system
- 1.1 metric system 1.1.1 The units of measure lengths and microscopic objects 1.1.2 units of measure objects or relatively large distances
- 1.1.1 The units of measure lengths and microscopic objects
- 1.1.2 units of measure objects or relatively large distances
- 1.2 English and American system
- 2 units of measurement distances very large
- 3 Examples of measurement units length
- 4 Video International System of Units
- 5 References

## Measurement units length and distance

It is used to measure the length of things or distances multiple units, which are classified under two different systems known as one imperial system or English (in English: Imperial System) which is the evolution of ancient hundreds of years in the United Kingdom, that the French developed the metric system (in English: Metric System) in 1670 m, which has spread rapidly in the whole of Europe, was adopted in most countries of the world except the United States and other few who have continued to adopt the imperial system of measurement in the present, and the units used in both systems are as follows: [1]

### The metric system

Used to measure the length of things or distances in the metric system multiple units, it is some multiples of a meter, and includes units that increase it, namely: dam., And Alhectamtr, and kilometer. The units below it illustrates the parts of it, namely: Alvmtomtr, and A, and Allbeckhumicr, nanometer , and micrometers, millimeters, and Centimeters Aldezmitr, and it is worth mentioning that the units that are parts of a meter or its complications usually are named by adding several characters in front of the word (m), the following months and measurement units length in this system arranged from smallest to largest: [2 ] [3]

Months measurement units the dimensions of the Hungarian objects very short are:

- Alvmtomtr: 1 femtometre = 10-15m, this is a very small length is used to measure the size of the nuclei; For example, the radius of the nucleus of carbon is 4 femtometre. [4]
- Allbeckhumicr: 1 picometre = 10-12m, and this unit is used to measure atomic dimensions; Any dimensions of the components of atoms. [5]
- A: A one equals 10-10m, and this unit is used primarily to measure the wavelengths of the electromagnetic spectrum, [6] and to measure atomic sizes.
- Nanometer represents a very small unit meter parts; Where it used to measure the extreme dimensions of the palace, which represents one thousand millionth of a meter; Ie: 1 nm = 10-9m, which is used to measure atoms and molecules; For example, a diameter of a water molecule is less than 1 nm, is also used in measurements of products, the so-called nanotechnology, [7] and is measured as the wavelength of visible light Balnanomitr; Ranging from 380 nm to 700 nm. [8]
- Micrometer or micron: It is part of a millionth of a meter; Any 1 micrometer = 10-6m, and is used in measuring the thickness or diameter of micro-organisms, as can be expressed as the wavelength of the infrared microns. [9]

Measurement units are considered objects or relatively large distances months and units of measurement in the metric system, namely: [10]

- Millimeter (mm): equal to 1/1000 of a meter; Ie: 1 mm = 0.001 m = 1 × 10-3m, one unit meter parts of the known and the smallest, which are used to measure objects dimensions of small objects or distances are relatively short, and almost equivalent to the thickness of the ATM card, and things measured by which the length of small keys, for example, or small notebook thickness. [11]
- Centimeter (cm): one centimeter is equivalent to 1/100 meters, it is part of a hundred of a meter; Each: 1 cm = 0.01 m = 1 × 10-2m, and every 100 cm is equivalent to 1 m, the equivalent of one centimeter display almost human fingernail. [12]
- Aldezimitr (creamy) is larger than a centimeter, and is equal to 1/10 meters; Ie: 1 = 0.1 m fat = 10-1m, and is less common than other units of length measurement such as centimeter, and meter, and kilometer.
- Meter (m): a basic unit to measure length in the International System of Units (SI), equivalent to the distance light travels in a vacuum during the period of 1/299 792 458 seconds, and 1 m = 10 Creamy = 100 cm = 1000 mm. [2]
- Dam.: It is the largest of a meter, and 1 decameter = 10 PM.
- Alhectomitr: It is the largest of the dam. Meter, and 1 hectometer = 100 m.
- Kilometer (km): It is the largest length units, and 1 km = 1000 m, used to measure large distances; Kalmsavh between the two cities.

### English and American system

Measurement units length and distances months in the English system and the US rank from largest to smallest are as follows: [13]

- Mile Maritime: (Nautical Mile) This unit is based on the perimeter of the basis of the planet, which is used by navigators during sea and air mobility, and 1 nautical mile = 6076 feet. [14]
- Farsakh: (Furlong), an old unit, currently used only in horse racing, and 1 = Farsakh 660 feet. [15]
- Mile: (Mile), a well-known unit used to measure the distances between places far from each other, and 1 mile = 5280 feet = 1.609344 km and tied traveled different seasonal walk in about twenty minutes.
- Aliard: (Yard) and a unit known and 1 yard = 3 feet = 36 inches = 0.9144 m, ie it is equivalent to almost a meter. [16]
- Football: (Foot), a unit of measurement depends on the length of the human foot used to measure distances in ancient times, was then considered as 1 foot = 12 inches = 30.45 cm to increase the accuracy of measurements, and standardization.
- An inch: (Inch), a small unit of measurement, and 1 inch = 0.083 feet = 2.54 cm, and width is estimated almost big thumb.

## The units measure distances very large

The following units are used too large to measure distances in space normally, namely:

- Astronomical Unit: astronomical unit is defined as the average distance between the Earth and the sun, equal to 150 million km, which is suitable for measuring distances within the solar system. [17]
- Light-year: the distance light travels in the floor of one, a unit to measure the distances between the stars, as the light-year one is equal to 9.4607 × 1015 m, or 9.4607 × 1012 km, or 63.241 astronomical units. [18] [19]
- Astronomical farsakh is a unit of measurement for very large distances, usually used within the scope of the galaxy, which is equal to 3.09 × 1016 m or 3.26 light years, and has been the practice that scientists also used academics astronomical multiples farsakh; Such as Kilo Farsakh; Which is equal to 1,000 leagues, or mega leagues; Which equals 100,000 leagues. [20]

## Examples of measurement units length

- Example: Type the appropriate unit to measure each of the following: [21] [22] The distance between New York and London. The radius of the finger. Human length. The thickness of the ID card. The length of a paper clip. The room dimensions. The book dimensions. The length of the shoe. The distance between the Earth and Mars.
- The distance between New York and London.
- The radius of the finger.
- Human length.
- The thickness of the ID card.
- The length of a paper clip.
- The room dimensions.
- The book dimensions.
- The length of the shoe.
- The distance between the Earth and Mars.
- The solution: The distance between New York and London: Mile English system, kilometer metric system. The radius of the finger: the English system an inch, centimeter or millimeter metric system. Human length: Aliard or foot English system, the meter metric system. ID card thickness: English system an inch, Ml metric system. The length of a paper clip: English system an inch, centimeter metric system. The room dimensions: Aliard English system, the meter metric system. The dimensions of the book: foot or an inch English system, a centimeter metric system. Boot Length: foot or an inch English system, a centimeter metric system. The distance between the Earth and Mars: astronomical unit.
- The distance between New York and London: Mile English system, kilometer metric system.
- The radius of the finger: the English system an inch, centimeter or millimeter metric system.
- Human length: Aliard or foot English system, the meter metric system.
- ID card thickness: English system an inch, Ml metric system.
- The length of a paper clip: English system an inch, centimeter metric system.
- The room dimensions: Aliard English system, the meter metric system.
- The dimensions of the book: foot or an inch English system, a centimeter metric system.
- Boot Length: foot or an inch English system, a centimeter metric system.
- The distance between the Earth and Mars: astronomical unit.

## Video International System of Units

Is a scientific way to express values and magnitudes important, watch the video to recognize the international system of units:

## References

- ↑ "Metric - US/Imperial Conversion Charts", www.mathsisfun.com, Retrieved 10-5-2020. Edited.
- ^ A b Dr. Mohamed Ahmed Aeshuna (.), The basics of measuring the dimensions in the light of international quality standards ISO 9000: The basics of measuring dimensions in the light of the international quality standard ISO 9000,.: Obeikan, Page 91-103, Part I. Edited.
- ↑ "Metric Units of Length: Lesson for Kids", study.com, Retrieved 7-5-2020. Edited.
- ↑ George F. Bertsch, Sharon Bertsch McGrayne, James Trefil (12-7-2017), "Atom"، Britannica, Retrieved 15-12-2017.
- ↑ "Picometer", Your Dectionary, Retrieved 15-12-2017.
- ↑ "Angstrom", Britannica, Retrieved 15-12-2017.
- ↑ Lynn Charles Rathbun (5-11-2013), "How Big is a Nanometer?"، nanooze, Retrieved 15-12-2017. Edited.
- ↑ "Visible Light", NASA, Retrieved 15-12-2017. Edited.
- ↑ The Editors of Encyclopædia Britannica, "Micrometer"، Britannica, Retrieved 15-12-2017. Edited.
- ↑ "Units of Length Conversion Charts", www.math-only-math.com, Retrieved 7-5-2020. Edited.
- ↑ "Physical Quantities and Their Units", www.ipracticemath.com, Retrieved 7-5-2020. Edited.
- ↑ "Metric units of length review (mm, cm, m, & km)", www.khanacademy.org, Retrieved 7-5-2020. Edited.
- ↑ "US Standard Lengths", www.mathsisfun.com, Retrieved 7-5-2020. Edited.
- ↑ "What is a nautical mile, and how does it differ from a normal mile and a kilometer?", https://science.howstuffworks.com/innovation/science-questions/question79.htm, Retrieved 10-5-2020. Edited.
- ↑ "Furlong", www.britannica.com, Retrieved 10-5-2020. Edited.
- ↑ "Yard", /www.britannica.com, Retrieved 7-5-2020. Edited.
- ↑ "What is an Astronomical Unit?", coolcosmos.ipac.caltech.edu, Retrieved 7-5-2020. Edited.
- ↑ Bruce McClure (28-8-2017), "How far is a light-year?"، Astronomy Essentials, Retrieved 15-12-2017. Edited.
- ↑ Fraser Cain (2-7-2017), "HOW FAR IS A LIGHT YEAR?"، Universe Today, Retrieved 15-12-2017. Edited.
- ↑ "Parsec", www.britannica.com, Retrieved 7-5-2020. Edited.
- ↑ "US Standard Lengths ", www.mathopolis.com, Retrieved 10-5-2020. Edited.
- ↑ "3.8 Appropriate Units for Metric Measurement", www.ck12.org, Retrieved 10-5-2020. Edited.

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