ABSTRACT
Measurements enable us to compute quantities and solve problems. Units of measurement are also important in measurements and problem solving. A group of standard units and their combinations is called a system of units. Different units in the same system or units of different systems can be used to describe the same thing. Length, mass, and time are fundamental or base physical quantities that are used to describe a great many quantities and phenomena. Historically, the metric system was the outgrowth of proposals for a more uniform system of weights and measures in France during the seventeenth and eighteenth centuries. The data are given in centimeter-gram-second units, which are often used for practicality when dealing with small, whole-number quantities in some situations. The results of intermediate steps are important in themselves and need to be rounded off to the appropriate number of digits as if each were a final answer.
