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The far east

Back to The Far East: A.D. 1301 to 1400

China and manchuria (ming dynasty)

In 1428 the Ming Empire was divided into thirteen provinces, plus the two metropolitan areas of Peking and Nanking. China's canal system was enlarged and nothing in the world equaled China's internal water traffic and trade. Eventually some of the river rafts were three miles long, able to ingeniously fold so as to make the bends in the rivers. (Ref. 260 ) Fortunately the invention and construction of deep water locks throughout the length of the Grand Canal allowed the use of that canal 12 months a year, without having to worry about high and low water periods. (Ref. 279 )

In addition, great maritime expeditions established Chinese hegemony over the key commercial centers of the Indian Ocean, the Malacca straits, Ceylon, Calicut and less definitely at the Persian Gulf. By 1420 the navy was comprised of at least 3,800 ships of which 1,350 were fighting vessels, including 400 large floating fortresses. (Ref. 279 ) Between 1405 and 1433 a Chinese Admiral Cheng-ho, actually a Moslem eunuch, had made seven voyages into the Indian Ocean, bringing back objects from Java, Ceylon and even East Africa. He had 62 ships, the largest vessels probably displacing about 1,500 tons

In comparison, Vasco da Gama's flagship displaced only 300 tons. (Ref. 279 )
and carrying 28,000 men. Including the expeditions under other leaders there were perhaps some 250 vessels participating in the various overseas projects, all of which came to an abrupt halt in 1434 when the emperor suddenly ordered the expeditions stopped and prohibited any further ship construction. The result of this was delivery of the China coast into the hands of the Japanese
Although the Japanese were blamed, McNeill (Ref. 279 ) says that these actually were chiefly Chinese merchant sailors who now had to make their living illegally in this way.
and Malay pirates along with the Portuguese sailors. (Ref. 46 , 8 , 101 , 260 )

Politically, Ming China was somewhat subdued, because of the previous excesses of the Mongol Dynasty and some conscious social leveling affected by the early Ming rulers.

The rich were humbled, slavery was abolished and the poor were pampered with low rental, state land and gifts of seeds, tools and farm animals. China received her horses from Asia, particularly through special frontier fairs in Mongolia and Manchuria. (Ref. 260 ) Fairs were not seen in the number and way that we met in Europe. When the nation was pretty well unified under the Mings, the fairs almost -completely disappeared from the interior and appeared only on the external frontiers, as noted regarding the horse fairs near Manchuria. Occasionally a caravan would arrive from Moscow, setting up fairs in Hanchu or Cheng Tun. (Ref. 292 )

In the first half of the century metal characters for use as moveable type were perfected (this may actually have been done in Korea) and these soon became widely used for 50 years before the Gutenberg "invention". Inflation, which had been occurring over several centuries, now reached the point where 1,000 paper notes were required for 3 caixas of cash, so the state abandoned the paper money and private banks put it out only for local needs. As paper money disappeared, rice reappeared as a money substitute for ex- change. (Ref. 260 )

Questions & Answers

A golfer on a fairway is 70 m away from the green, which sits below the level of the fairway by 20 m. If the golfer hits the ball at an angle of 40° with an initial speed of 20 m/s, how close to the green does she come?
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A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of 8.0 m/s. During its fall, how much work is done on the mouse by air resistance
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A ball is thrown straight up.it passes a 2.0m high window 7.50 m off the ground on it path up and takes 1.30 s to go past the window.what was the ball initial velocity
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2. A sled plus passenger with total mass 50 kg is pulled 20 m across the snow (0.20) at constant velocity by a force directed 25° above the horizontal. Calculate (a) the work of the applied force, (b) the work of friction, and (c) the total work.
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you have been hired as an espert witness in a court case involving an automobile accident. the accident involved car A of mass 1500kg which crashed into stationary car B of mass 1100kg. the driver of car A applied his brakes 15 m before he skidded and crashed into car B. after the collision, car A s
Samuel Reply
can someone explain to me, an ignorant high school student, why the trend of the graph doesn't follow the fact that the higher frequency a sound wave is, the more power it is, hence, making me think the phons output would follow this general trend?
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Nevermind i just realied that the graph is the phons output for a person with normal hearing and not just the phons output of the sound waves power, I should read the entire thing next time
Joseph
Follow up question, does anyone know where I can find a graph that accuretly depicts the actual relative "power" output of sound over its frequency instead of just humans hearing
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progressive wave
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A string is 3.00 m long with a mass of 5.00 g. The string is held taut with a tension of 500.00 N applied to the string. A pulse is sent down the string. How long does it take the pulse to travel the 3.00 m of the string?
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Source:  OpenStax, A comprehensive outline of world history. OpenStax CNX. Nov 30, 2009 Download for free at http://cnx.org/content/col10595/1.3
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