Prefixes units

The Systeme International d Unites (International System of Units) has the abbreviation SI. It includes base units, supplementary and derived units which together form a coherent system of units. Prefixes are used to form decimal multiples and sub-multiples of the SI units. 

The structure-based nomenclature rests upon the selection of a preferred CRU [1, 12] of which the polymer is a multiple the name of the polymer is the name of this repeating unit prefixed by poly . The unit itself is named wherever possible according to the established principles of organic nomenclature [3]. For double-strand polymers, this unit usually is a tetravalent group denoting attachment to four atoms. Since some of these attachments may be double bonds, the unit may be hexavalent or octavalent. Table 6 lists some examples. 

For units, prefixes and conversion factors see front matter, pp. xii-xiv. 

Prefix Symboi Factor of Base Unit Prefix Symboi Factor of Base Unit... 

Prefixes for units larger than the base unit Prefixes for units smaller than the base unit ... 

Conversion of units within the metric system may be accomplished by using the factor-label method as well. Unit prefixes that dictate the conversion factor facilitate unit conversion (refer to Table 1.1). 

From the basic units, other units may be derived, e.g., Newton, Pascal, Joule, Volt To the basic units prefixes may be attached. The prefixes are given in Table 11.4. We ask now whether the seven basic units are literally basic. For example, we can derive the temperature from the ideal gas law... 

With SI units, prefixes are used to indicate decimal liractions or multiples of various units. For example, the prefix milH- represents a 10 fraction, one-thousandth, of a unit A milligram (mg) is 10 gram (g), a millimeter (mm) is 10 meter (m), and so forth. TABLE 1.5 presents the prefixes commonly encountered in chemistry. In using SI units and in working problems throughout this text, you must be comfortable using exponential notation. If you are unfamiliar with exponential notation or want to review it, refer to Appendix A.l. 

All other SI units are derived from the seven fnndamental units. Prefixes are used to indicate multiples or fractions of the fundamental nnits (Table 1.2). In some cases, it has been found convenient to give derived units specific names. For example, the derived unit for force is kg m/s, which has been given the name newton (abbreviated N) in honor of Sir Isaac Newton (1642-1726). Some examples of derived units are given in Table A.2. 

The metric system, or International System (SI, from Systlme International), is a decimal system of units for measurements of mass, length, time, and other physical quantities. Built around a set of standard units, the metric system uses factors of 10 to express larger or smaller numbers of these units. To express quantities that are larger or smaller than the standard units, prefixes are added to the names of the units. These prefixes represent multiples of 10, making the metric system a decimal system of measurements. Table 2.1 shows the names, symbols, and numerical values of the common prefixes. Some examples of the more commonly used prefixes are... 

Interactivity SI Base Units (1.5) Interactivity Unit Prefixes (1.5)... 

The kilogram (1 ) is the SI base unit of mass, equal to about 2.2 pounds. This is an unusual base unit in that it contains a prefix. In forming other SI mass units, prefixes are added to the word gram (g) to give units such as the milligram (mg 1 mg = 10 g). 

Prefixes such as centi, milli, and micro provide smaller units prefixes such as kilo, mega, and tera provide larger units. 

Table 1.2 lists the basic quantities as expressed in SI together with the unit abbreviations, Table 1,3 lists the unit prefixes needed for this book, and Table 1.4 lists some of the constants needed in several systems. Finally, Table 1.5 lists the conversion factors into SI for all quantities needed for this book. The boldface letters for each quantity represent the fundamental dimensions F = force, L = length, M = mass, mole = mole, T = temperature, 0 = time. The list of notation at the end of each chapter gives the symbols used, their meaning, and dimensions. 

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