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Infobox references. 2,4,5-Trichlorophenoxyacetic acid (also known as 2,4,5-T), a synthetic auxin, is a chlorophenoxy acetic acid herbicide used to defoliate broad-leafed plants. It was developed in the late 1940s, synthesized by reaction of 2,4,5-Trichlorophenol and chloroacetic acid. It was widely used in the agricultural industry until being ...
Fishing is an ancient practice that dates back at least to the Upper Paleolithic period which began about 40,000 years ago. [4][5] Isotopic analysis of the skeletal remains of Tianyuan man, a 40,000-year-old modern human from eastern Asia, has shown that he regularly consumed freshwater fish. [6][7] Archaeological features such as shell middens ...
Primary education in Costa Rica is required by law for most children in the country between the ages of 6 and 13. Because of this, their literacy is 98% which is one of the highest in Latin America. Primary education starts in first grade and goes through sixth grade. Education is generally free to students.
Present location. National Archaeological Museum, Athens. The Antikythera mechanism (/ ˌæntɪkɪˈθɪərə / AN-tik-ih-THEER-ə, US also / ˌæntaɪkɪˈ -/ AN-ty-kih-) [ 1 ][ 2 ] is an Ancient Greek hand-powered orrery (model of the Solar System). It is the oldest known example of an analogue computer [ 3 ][ 4 ][ 5 ] used to predict ...
A Waffenamt-Prüfwesen 1 report estimated [87] that with the M4 angled 30 degrees sideways and APCBC round, the Tiger I's 8.8 cm KwK 36 L/56 gun would be capable of penetrating the differential case of an American M4 Sherman from 2,100 m (6,900 ft) and the turret front from 1,800 m (5,900 ft), but the Tiger's 88 mm gun would not penetrate the ...
The ii–V–I progression ("two–five–one progression") (occasionally referred to as ii–V–I turnaround, and ii–V–I) is a common cadential chord progression used in a wide variety of music genres, including jazz harmony. It is a succession of chords whose roots descend in fifths from the second degree (supertonic) to the fifth degree ...
The top grade, A, is given here for performance that exceeds the mean by more than 1.5 standard deviations, a B for performance between 0.5 and 1.5 standard deviations above the mean, and so on. [18] Regardless of the absolute performance of the students, the best score in the group receives a top grade and the worst score receives a failing grade.
This is a list of articles about prime numbers.A prime number (or prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself. By Euclid's theorem, there are an infinite number of prime numbers.