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Burka [1]
3 years ago
13

Examples and non examples of isolationism

History
1 answer:
Volgvan3 years ago
3 0

this might help but isolationism is like something that keeps to itself, country stays out of foreign entanglements really non involvements

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What are contributions of Ancient Africa? <br><br> Please state at least 3...
elixir [45]
Surely only a few of us know that many modern high-school-level concepts in mathematics first were developed in Africa, as was the first method of counting. More than 35,000 years ago, Egyptians scripted textbooks about math that included division and multiplication of fractions and geometric formulas to calculate the area and volume of shapes (3). Distances and angles were calculated, algebraic equations were solved and mathematically based predictions were made of the size of floods of the Nile. The ancient Egyptians considered a circle to have 360 degrees and estimated Π at 3.16 (3).

Eight thousand years ago, people in present-day Zaire developed their own numeration system, as did Yoruba people in what is now Nigeria. The Yoruba system was based on units of 20 (instead of 10) and required an impressive amount of subtraction to identify different numbers. Scholars have lauded this system, as it required much abstract reasoning (4).

Astronomy
Several ancient African cultures birthed discoveries in astronomy. Many of these are foundations on which we still rely, and some were so advanced that their mode of discovery still cannot be understood. Egyptians charted the movement of the sun and constellations and the cycles of the moon. They divided the year into 12 parts and developed a yearlong calendar system containing 365 ¼ days (3). Clocks were made with moving water and sundial-like clocks were used (3).

A structure known as the African Stonehenge in present-day Kenya (constructed around 300 B.C.) was a remarkably accurate calendar (5). The Dogon people of Mali amassed a wealth of detailed astronomical observations (6). Many of their discoveries were so advanced that some modern scholars credit their discoveries instead to space aliens or unknown European travelers, even though the Dogon culture is steeped in ceremonial tradition centered on several space events. The Dogon knew of Saturn’s rings, Jupiter’s moons, the spiral structure of the Milky Way and the orbit of the Sirius star system. Hundreds of years ago, they plotted orbits in this system accurately through the year 1990 (6). They knew this system contained a primary star and a secondary star (now called Sirius B) of immense density and not visible to the naked eye.

Metallurgy and tools
Many advances in metallurgy and tool making were made across the entirety of ancient Africa. These include steam engines, metal chisels and saws, copper and iron tools and weapons, nails, glue, carbon steel and bronze weapons and art (2, 7).

Advances in Tanzania, Rwanda and Uganda between 1,500 and 2,000 years ago surpassed those of Europeans then and were astonishing to Europeans when they learned of them. Ancient Tanzanian furnaces could reach 1,800°C — 200 to 400°C warmer than those of the Romans (8).
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3 years ago
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Describe the impact the Erie Canal had in the U.S
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It improved New Yorks economy and was the second longest canal at the time it was built

8 0
3 years ago
what could happen if someone refuse to answer questions asked by the house un American Activities Committee​
hram777 [196]

Answer:

If someone refused to answer questions asked by the House Un-American Activities Committee, he could be accused of being a communist.

Explanation:

The House Un-American Activities Committee was active between 1934 and 1975. This committee, whose activities accelerated especially in the 1950s, investigated many American artists and intellectuals. In 1969, the name of the Committee was changed to "House Committee on Internal Security", and in 1975 it was ceased.

Many prominent artists such as Albert Einstein, Hanns Eisler, Orson Welles and Jules Dassin were investigated, suspected on being communists, or even worse, Soviet spies.

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3 years ago
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According to the 25th Amendment, what are the first 3 offices listed in the presidential line of succession?
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Vice President , speaker of the HOR(house of representatives), then the president pro tempore of the Senate
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The Chairperson of a House committee goes to
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<span>The Chairperson of a House committee goes to a full house.</span>
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