Basic notion for building materials

Curs - Basic notion for building materials

1.UNITS, MEASURES, & DIMENSIONS

1.1. MEASUREMENTS
Measurement is the most useful form of description in science. Often the most useful measurements are those that have a number and a unit, such as ‘12.7 inches.' Here '12.7' is the number and 'inches' is the unit. This unit of inches in the example is one of the common units in the dimension of length. A number, then, is an expression in numerals. A unit is a recognized way to divide the essence of a dimension for measurement, and a dimension is a measurable physical idea. Here is a bit of advice you can overlook only at your peril: To become fluent in the subject we should memorize the basic background of information. The following units, dimensions, and measures are so basic to the study of Chemistry.