Indigenous<span> cultures shaped, and were shaped by, the </span>geography<span> of North America. The first North Americans are believed to have </span>migrate<span>d from Siberia, in northeast Asia, by crossing a </span>land bridge<span> over the Bering Strait. These populations fanned out southward, to present-day Florida, California, Mexico, and Central America. </span>
<span>The Olmec and the Maya, indigenous to Central America, built the first cities on the continent, eventually leading to the great urban areas of Tenochtitlan, Texcoco, and Tlacopan. These cities, in what is now central Mexico, boasted </span>sophisticated engineering<span> structures, such as </span>canal<span>s, apartment buildings, and </span>irrigation<span> systems. </span>
<span>Many of these early North American cultures were scientifically and agriculturally advanced. Mayan calendars and </span>almanac<span>s recorded </span>celestial<span>events such as </span>eclipse<span>s and </span>seasonal<span> changes. The Mayans were also mathematically advanced. Their counting system was able to represent very large numbers using only three symbols: dots, lines, and a football-shaped symbol that indicated a zero. The Mayans were, in fact, the first culture to have a written symbol for zero. </span>
<span>Cultures throughout southern North America harvested corn, squash, and beans in regular cycles. This sort of </span>agriculture<span> allowed major </span>civilization<span>s to develop. People were no longer bound to produce food and shelter for their families—some people could work in the food and construction industries while others became engineers, artists, and political leaders. Leading North American civilizations include the Maya and Aztec, in what is now Mexico, and the Iroquois, native to southeastern Canada and the northeastern United States. .................</span>
You recently sold 200 shares of disney stock, and the transfer was made through a broker. this is an example of<u> A </u><u>secondary market transaction.</u>
<h3>What is secondary market?</h3>
Investors can acquire and sell securities they already possess on the secondary market. Although stocks are also sold on the main market when they are originally issued, it is what most people refer to as the "stock market." Secondary markets include the national exchanges, such the NASDAQ and the New York Stock Exchange (NYSE).
Investors trade with one another in secondary marketplaces as opposed to the issuing business.
The secondary market influences the price of securities toward their true worth through a vast network of separate but connected exchanges.
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To learn more about secondary market from given link
Stefan-Boltzmann law. Stefan-Boltzmann law, expresses that the all out brilliant warmth power transmitted from a surface is corresponding to the fourth intensity of its total temperature.
The law applies just to black bodies, hypothetical surfaces that assimilate all occurrence heat radiation.
From the relationship which is an adjustment to Astronomy, of Stephen's Law: