Period Period A full stop ( . ) (British, New Zealand and Australian English) or period (American English and Canadian English)[1] is the punctuation mark commonly placed at the end of sentences. In the 21st century, it is sometimes called a dot. In conversation, as opposed to linguistics, the term is often used to mean "the end of the matter" (for example, "We are calling a full stop to discussions on this subject" or "We will not do it. Period!"). The full stop symbol derives from Aristophanes of Byzantium who invented the system of punctuation where the height of placement of a dot on the line determined its meaning. The high dot (˙) was called a "periodos" and indicated a finished thought or sentence, the middle dot (·) was called a "kolon" and indicated part of a complete thought, while the low dot (.) was called a "telia" and also indicated part of a complete thought. The glyph has two alternative uses with regard to numbers. It can be used either as a decimal separator or to present large numbers in a much more readable form. The former use is more prevalent in English-speaking countries. In much of Europe, Southern Africa and Latin America (with the exception of Mexico due to the influence of the United States), a comma is used as a decimal separator, while a full stop or a space is used for the presentation of large numbers. The following are examples where the comma is or would be used as a decimal separator: 1.002,003 or 1 002,003 (One thousand and two and three thousandths) Know More About :- Derive Quadratic Formula
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1.002.003 or 1 002 003 (One million two thousand and three) In countries that use the comma as a decimal separator, the full stop is sometimes found as a multiplication sign; for example, 5,2 . 2 = 10,4. This usage is impractical in cases where the full stop is used as a decimal separator, hence the use of the interpunct: 5.2 · 2 = 10.4.[citation needed] This notation is also seen when multiplying units in science; for example, 50 km/h could be written as 50 km·h−1 (this can also be written as 50 km h−1). Time is a dimension in which events can be ordered from the past through the present into the future, and the measure of durations of events and the intervals between them. Time has long been a major subject of study in religion, philosophy, and science, but defining it in a manner applicable to all fields without circularity has consistently eluded scholars. Nevertheless, diverse fields such as business, industry, sports, the sciences, music, dance, and the live theater all incorporate some notion of time into their respective measuring systems. Some simple, relatively uncontroversial definitions of time include "time is what clocks measure"and "time is what keeps everything from happening at once". Two contrasting viewpoints on time divide many prominent philosophers. One view is that time is part of the fundamental structure of the universe—a dimension independent of events, in which events occur in sequence. Sir Isaac Newton subscribed to this realist view, and hence it is sometimes referred to as Newtonian time. The opposing view is that time does not refer to any kind of "container" that events and objects "move through", nor to any entity that "flows", but that it is instead part of a fundamental intellectual structure (together with space and number) within which humans sequence and compare events. This second view, in the tradition of Gottfried Leibniz and Immanuel Kant,holds that time is neither an event nor a thing, and thus is not itself measurable nor can it be travelled. Time is one of the seven fundamental physical quantities in the International System of Units. Time is used to define other quantities — such as velocity — so defining time in terms of such quantities would result in circularity of definition.[24] An operational definition of time, wherein one says that observing a certain number of repetitions of one or another standard cyclical event (such as the passage of a free-swinging pendulum) constitutes one standard unit such as the second, is highly useful in the conduct of both advanced experiments and everyday affairs of life. The operational definition leaves aside the question whether there is something called time, apart from the counting activity just mentioned, that flows and that can be measured. Read More About :- Quadratic Formula Examples
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