Conversion metrics

16 Cups 256 Tablespoons 256 Tablespoons = 768 Teaspoons 1 Gallon = 4 Quarts 1 Quart 2 Pints 1 Pint = 2 Cups  

Pounds Metric U.S. Grams(g) or Ounces Kilograms(kg) Pounds Metric U.S. Grams(g) or Ounces Kilograms(kg)  

Pounds Tendis Kilograms(kg) Pounds Tenths Kilograms(kg)  

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Table 1-5 Metric Conversion Factors as Exact Numerical...

Fairfield Engineering Co. data in U.S. customary system. Metric conversion is rounded off. For inclined conveyors, add lift liotnepower to center horsepower for total horsepower. For temrinals multiply horsepower hy the following factotn 0-50 ft (15.2 m), 1.20 51-100 ft (.30.5 m), 1.10 101-150 ft (45.7 m), 1.05. For countershaft drives, multiply horsepower hy 1.05 for each reduction (cut geatn). 

TABLE 21-21 Expected Metric Conversion of Packages for Chemical Products in the United States... 

FPN) For metric conversion practices, see Standard for Metric Practice, ANSI/ASTM E380-I993. 

Beginning students often regard the metric system as difficult because it is new to them and because they think they must learn all the English-metric conversion factors (Table 2-3). Engineers do have to work in both systems in the United States, but scientists generally do not work in the English system at all. Once you familiarize yourself with the metric system, it is much easier to work with than the English system is. 

Instructors often require English-metric conversions for two purposes to familiarize the student with the relative sizes of the metric units in terms of the more familiar English units, and for practice in conversions (see Sec. 2.4). Once you really get into the general chemistry course, the number of English-metric conversions that you do is very small. 

The conversion factor approach is quite useful with metric problems. (If you have not yet worked your way through the conversion factor presentation in Unit 4, you might want to do so now.) The metric conversion factors are ones that you can make yourself using the prefixes in Table 15.1. Examples include... 

The SI (metric) system of units is the primary one for the text. Because the Btu-ft-pound system is still in wide use, answers and intermediate steps to examples are occasionally stated in these units. A few examples and problems are completely in English units. Some figures have dual coordinates that show both systems of units. These displays will enable the student to develop a bilingual capability during the period before full metric conversion is achieved. 

The metric system problem, part (a), can be solved without paper and pencil— by moving the decimal point in 5.200 three places to the right. The English system conversion, part (b), requires that we remember the number of yards per mile (harder than the 1000 m/km metric conversion factor) and that we use pencil and paper or a calculator to do the arithmetic. The conversion factor 1000 is used for kilograms, kilohters, kilowatts, and any other factor involving the prefix kilo-. The English conversion factor 1760 yd/mile is not used in any other conversion. 

English-metric conversions are most often presented, if at all, to give an idea of the size of the metric unit. They are not used very much in this course. 

The Metrication Committee plans to submit a series of articles to CEP at two or three month intervals that will deal with various aspects of metric conversion. These are planned to include a typical process flow diagram in SI, a consideration of hard vs. soft conversion, consideration of conversion of various physical properties into SI, case histories of conversion in various industries and companies, and a description of the working of the International Standards Organizations. 

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