Abstract
Publisher Summary This chapter presents an introduction to various physical notions, such as density, energy, and force. The task of physics is to investigate and comprehend the universe on a microscopic scale, such as atoms and molecules and on a macroscopic scale, such as everyday objects. It explains the three fundamental units of measure, which are length, time, and mass. The standard units of the metric system are the meter, the kilogram and the second, which is the MKS system. The chapter reviews the atomic standards of measure, and illustrates the calculation of density. It also presents how to estimate and express the sizes of some everyday things in terms of metric units and powers of 10.
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