# Measurements and Mathematics Terms

#### (mathematics is the deductive study of quantities, magnitudes, and shapes as determined by the use of numbers and symbols while every branch of science and engineering depends on mathematics; measurement is the process of associating numbers with physical quantities and phenomena and measurement is fundamental to the sciences; to engineering, construction, and other technical fields; and to almost all everyday activities)

**S**ystème**I**nternationale d’Unités**International System of Units**.

The International System is called the **SI**, using the first two initials of its French name *Système International d'Unités*.

The primary agreement is the "Treaty of the Meter" or the *Convention du Mètre*, signed in Paris on May 20, 1875.

Forty-eight nations have signed the treaty, including all the major industrialized countries. The United States is a charter member of the metric club, having signed the original document back in 1875.

Each SI unit is represented by a symbol, not an abbreviation. The use of unit symbols is regulated by precise rules.

These symbols are the same in every language of the world; however, the names of the units themselves vary in spelling according to national procedures; therefore, it is correct for Americans to write **meter** and Germans to write **Meter**, and it is also correct for the British to write **metre**, Italians to write **metro**, and Poles to write **metr**.

There is no *official* spelling of the SI units; however, the SI does provide the **names**, the **definitions**, and the **symbols** of the units which must be followed even when the spellings are different as shown below.

### The fundamental SI unit of length has numerous spellings

- meter (American English, Danish, Dutch, German, Hungarian, Norwegian, Slovak, and Swedish)
- metr (Czech, Polish, Russian, Ukrainian)
- metras (Lithuanian)
- metre (British, Australian, Canadian and New Zealand English; French)
- metri (Finnish)
- metro (Basque, Italian, Portuguese, Spanish)

### A list of elements associated with the *International System of Units* (SI)

- ampere (unit of measurement)
- are (unit of area measurement)
- atomic second
- candela (cd) (SI unit of measurement)
- centimeter (cm) (unit of measurement)
- coulomb (unit of energy measurement)
- farad (unit of measurement)
- gram (gm or g) (measurement)
- hectare (unit of measurement)
- henry (unit of energy measurement)
- hertz (unit of measurement)
- joule (unit of energy measurement)
- kelvin (K) (unit of measurement)
- kilogram (kg) (unit of measurement)
- kilometer (km) (unit of measurement)
- liter (l) (unit of measurement)
- lumen (unit of energy measurement)
- lux (unit of energy measurement)
- megohm (electronics)
- meter (m) (measurement)
- metric ton (unit of weight)
- micrometer (unit of measurement)
- millimeter (mm) (unit of measurement)
- mole (chemistry)
- nanometer (unit of measurement)
- nanotesla (physics)
- newton (unit of measurement)
- ohm (unit of energy measurement)
- pascal (Pa ) (unit of energy measurement)
- second (unit of time)
- siemens (S) (unit of energy measurement)
- tesla (unit of energy measurement)
- unit (measurement)
- volt (unit of measurement)
- watt (unit of measurement)
- weber (unit of measurement)

It is equal to 10^{-26} watts per square meter per hertz, and is named for the U.S. radio engineer, Karl Jansky (1905-1950).

3. A unit of work or energy in the International System of Units (SI) which is equal to the work done by a force of one newton (that force necessary to provide a mass of one kilogram with an acceleration of one meter per second per second).

2. An SI unit of work and energy, replacing the calorie (one joule equals 4.2 calories).

An an average speed of 186,291 miles or 299,792 kilometers, per second; which equals approximately 5.88 trillion miles or 9.4607 trillion kilometers, or 63,246 astronomical units.

The light-year is also divided into light-minutes and light-seconds; for example, the moon is 1.3 light-seconds from the earth; the sun is 8.3 light-minutes away from the earth.

Although a light-year is a measurement of distance and not time, it does imply time; such as, the light from a star that is ten light-years from the earth takes ten years to reach the earth; so, an observer on earth is seeing the star as it appeared ten years ago.

Math is the science of structure, order, and relation that has evolved from counting, measuring, and describing the shapes of objects

It deals with logical reasoning and quantitative calculation. Since the 17th century it has been an indispensable adjunct to the physical sciences and technology, to the extent that it is considered the underlying language of science.

Among the principal branches of math or mathematics are algebra, analysis, arithmetic, combinatorics (also called *combinatorial mathematics*, a branch of mathematics concerned with the selection, arrangement, and combination of objects chosen from a finite set), Euclidean and non-Euclidean geometries, game theory, number theory, numerical analysis, optimization, probability, set theory, statistics, topology, and trigonometry.

2. The branch of science concerned with number, quantity, and space, either as abstract ideas (pure mathematics) or as applied to physics, engineering, and other subjects (applied mathematics).

It uses signs, symbols, and proofs which includes arithmetic, algebra, calculus, geometry, and trigonometry.

2. The systematic treatment of magnitude, relationships between figures and forms, and relations between quantities expressed symbolically.

3. The calculations involved in a process, estimate, or plan; such as, it may be a simple idea, but the mathematics of it are much more complex.

Originally, mathematics was the science of numbers and quantities; however, with the birth of numerous more qualitative formalisms (including, logic, propositional calculi, set theory), with the emergence of the unifying idea of a mathematical structure, with the advent of the axiomatic method emphasizing inference, proof and the descriptions of complex systems in terms of simple axioms, and, finally, with self-reflective efforts as meta-mathematics, the term has become the autonomous science of formal constructions.

Among the principal branches of mathematics are algebra, analysis, arithmetic, combinatorics, Euclidean and non-Euclidean geometries, game theory, number theory, numerical analysis, optimization, probability, set theory, statistics, topology, and trigonometry.

2. A unit specified by a scale; such as, a degree, or by variable conditions, for example, room temperature.

3. A system of measurement including the metric system.

4. To ascertain the dimensions, quantity, or capacity of something.

5. To mark off or apportion, usually with reference to a given unit of measurement.

6. A standard used for determining the dimensions, area, volume, or weight of something.

2. The process of associating numbers with physical quantities and phenomena.

Measurement is fundamental to the sciences; including, engineering, to construction, and other technical fields; and to almost all everyday activities. That is the reason the elements, conditions, limitations, and theoretical foundations of measurement have been studied so much.

The number indicates what part of the denominator is used.

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