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An abacus (pl. abaci or abacuses), also called a counting frame, is a hand-operated calculating tool which was used from ancient times in the ancient Near East, Europe, China, and Russia, until the adoption of the Hindu–Arabic numeral system. [1] An abacus consists of a two-dimensional array of slidable beads (or similar objects). In their ...
Before the Renaissance, mathematics was divided into two main areas: arithmetic, regarding the manipulation of numbers, and geometry, regarding the study of shapes. [7] Some types of pseudoscience, such as numerology and astrology, were not then clearly distinguished from mathematics. [8] During the Renaissance, two more areas appeared.
[1] [2] It was formulated by physicist Amos Dolbear and published in 1897 in an article called "The Cricket as a Thermometer". [3] Dolbear's observations on the relation between chirp rate and temperature were preceded by an 1881 report by Margarette W. Brooks, [ n 1 ] although this paper went unnoticed until after Dolbear's publication.
[2] [3] The unit of energy consumed is deemed to be 33.7 kilowatt-hours without regard to the efficiency of conversion of heat energy into electrical energy, also measured in kilowatt-hours (kWh). The equivalence of this unit to energy in a gallon of gasoline is true if and only if the heat engine, generating equipment, and power delivery to ...
Sunshine hours for selected cities in Europe Country City Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Ref. Albania: Tirana: 124 125 165 191
Sagittarius A*, abbreviated as Sgr A* (/ ˈ s æ dʒ ˈ eɪ s t ɑːr / SADGE-AY-star [3]), is the supermassive black hole [4] [5] [6] at the Galactic Center of the Milky Way.Viewed from Earth, it is located near the border of the constellations Sagittarius and Scorpius, about 5.6° south of the ecliptic, [7] visually close to the Butterfly Cluster (M6) and Lambda Scorpii.
This is an accepted version of this page This is the latest accepted revision, reviewed on 29 January 2025. Electronic telecommunications device to perform financial transactions Several terms redirect here. For other uses, see Cash machine (disambiguation), Money machine (disambiguation), and ATM (disambiguation). An old Nixdorf ATM Smaller indoor ATMs dispense money inside convenience stores ...
In 2012, Nokia announced and released the Nokia 808 PureView, featuring a 41-megapixel 1/1.2-inch sensor and a high-resolution f/2.4 Zeiss all-aspherical one-group lens. The high resolution enables four times of lossless digital zoom at 1080p and six times at 720p resolution, using image sensor cropping . [ 103 ]