A measuring instrument is a device to measure a physical quantity. In the physical sciences , quality assurance , and engineering , measurement is the activity of obtaining and comparing physical quantities of real-world objects and events .
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A typical soil is about 50% solids (45% mineral and 5% organic matter), and 50% voids (or pores) of which half is occupied by water and half by gas. The percent soil mineral and organic content can be treated as a constant (in the short term), while the percent soil water and gas content is considered highly variable whereby a rise in one is simultaneously balanced by a reduction in the other.
Italy (Italian: Italia ()), officially the Italian Republic (Italian: Repubblica Italiana [reˈpubblika itaˈljaːna]), is a country located in the middle of the Mediterranean Sea, in Southern Europe; its territory largely coincides with the homonymous geographical region.
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