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Europe

Back to Europe: A.D. 701 to 800

As this century opened, and particularly in A.D. 814, the year of the death of Charlemagne, Europe and Asia were recovering from the previous waves of barbarian invasions and a series of powerful empires extended in unbroken sequence from the Atlantic to the Pacific. The northern ones of Europe, however, - Frankish and Bulgarian - were really conquests of war bands and had very little stability. (Ref. 8 )

Southern europe

Eastern mediterranean islands

The copper mines of Cyprus continued to be exploited. Over a period of some 3,000 years about 200,000 tons of that metal has been produced on Cyprus. The smelting requires charcoal in the amount that would be the equivalent of 150,000 square kilometers (58,000 square miles) of forest. Since all Cyprus totals only 9,300 square kilometers, the forests of the island must have been destroyed at least 16 times. (Ref. 281 ) The Turks took Crete from the Byzantine controlled Venetians and in 825 built a base with a surrounding moat, where Moslem pirates dominated until the middle of the next century. Malta was taken by the Moslems in 869. (Ref. 38 , 222 )

Greece

The greater part of Greece was a part of Byzantium and, as such, shared in its temporary renaissance. Bulgaria took over part of northern Greece as a part of their expansion early in the century. Demonstrating the geological instability of the region, an earthquake of 856 killed 45,000 Corinthians. (Ref. 222 )

Upper balkans

The Avars were conquered by Charlemagne in 805 and as the remnants were pushed out of Hungary into the upper Balkans, they were absorbed by the Bulgars and Slavs. In 811 the still pagan Bulgars, under Prince Drum, defeated and destroyed the Byzantine armies of Emperor Nicephorus and then they took over a large part of the peninsula, even including some of Greece. Their territory then stretched from the Danube to the Theiss and from the Carpathians to the Dniester. Originally a Turkish people, the Bulgars became, by repeated admixture, almost entirely Slavonic in race and language. The Bulgar Khanate, under Czars Malamir and Boris , continued to expand rapidly and their empire even included a great part of Hungary until about 893, when the Magyars overcame the light hold of the Bulgarians in that region. (Ref. 137 , 8 )

Bulgaria and Serbia were won for the eastern Christian Church in 870 and 879, respectively, through the efforts of Cyril and Methodius, Macedonian Brothers, who helped Khan Boris to evolve a Slavonic or Cyrillic alphabet, thus allowing the development of a national written language and culture. Faced with Slavonic sounds which did not exist in Greek, they stretched the Greek alphabet as far as it would go, then drafted one or two Hebrew characters and invented others. The Eastern Church (Russian, Ukrainian, Serbian and Bulgarian) still uses this Cyrillic alphabet. (Ref. 168 , 222 ) Farther for Western Christianity in 879, after they had made themselves independent of the German Empire in 869. (Ref. 137 )

Italy

We noted in the last chapter that Charlemagne had seized the Lombard Kingdom in 774 and this remained under his control until his death in 814. Italy, as a whole was under divided rule. By the Treaty of Verdun of 843, the Frankish heir, Lothar, got a long central strip of Europe along with northern Italy and down to the frontier of the Duchy of Benevento in southern Italy and he retained the title of emperor. A weak papacy, leagued with France, ruled a central area; the Venetians had their own kingdom; and various dukes ruled scattered provinces. Part of Sicily was conquered by the Aghlabids from Tunisia in 827 and by 840 they held most of that island and the heel of Italy. They were finally expelled by the Byzantines at the end of the century. During the period of the Moslem raids, even Rome had been attacked. (Ref. 8 , 137 )

Questions & Answers

Three charges q_{1}=+3\mu C, q_{2}=+6\mu C and q_{3}=+8\mu C are located at (2,0)m (0,0)m and (0,3) coordinates respectively. Find the magnitude and direction acted upon q_{2} by the two other charges.Draw the correct graphical illustration of the problem above showing the direction of all forces.
Kate Reply
To solve this problem, we need to first find the net force acting on charge q_{2}. The magnitude of the force exerted by q_{1} on q_{2} is given by F=\frac{kq_{1}q_{2}}{r^{2}} where k is the Coulomb constant, q_{1} and q_{2} are the charges of the particles, and r is the distance between them.
Muhammed
What is the direction and net electric force on q_{1}= 5µC located at (0,4)r due to charges q_{2}=7mu located at (0,0)m and q_{3}=3\mu C located at (4,0)m?
Kate Reply
what is the change in momentum of a body?
Eunice Reply
what is a capacitor?
Raymond Reply
Capacitor is a separation of opposite charges using an insulator of very small dimension between them. Capacitor is used for allowing an AC (alternating current) to pass while a DC (direct current) is blocked.
Gautam
A motor travelling at 72km/m on sighting a stop sign applying the breaks such that under constant deaccelerate in the meters of 50 metres what is the magnitude of the accelerate
Maria Reply
please solve
Sharon
8m/s²
Aishat
What is Thermodynamics
Muordit
velocity can be 72 km/h in question. 72 km/h=20 m/s, v^2=2.a.x , 20^2=2.a.50, a=4 m/s^2.
Mehmet
A boat travels due east at a speed of 40meter per seconds across a river flowing due south at 30meter per seconds. what is the resultant speed of the boat
Saheed Reply
50 m/s due south east
Someone
which has a higher temperature, 1cup of boiling water or 1teapot of boiling water which can transfer more heat 1cup of boiling water or 1 teapot of boiling water explain your . answer
Ramon Reply
I believe temperature being an intensive property does not change for any amount of boiling water whereas heat being an extensive property changes with amount/size of the system.
Someone
Scratch that
Someone
temperature for any amount of water to boil at ntp is 100⁰C (it is a state function and and intensive property) and it depends both will give same amount of heat because the surface available for heat transfer is greater in case of the kettle as well as the heat stored in it but if you talk.....
Someone
about the amount of heat stored in the system then in that case since the mass of water in the kettle is greater so more energy is required to raise the temperature b/c more molecules of water are present in the kettle
Someone
definitely of physics
Haryormhidey Reply
how many start and codon
Esrael Reply
what is field
Felix Reply
physics, biology and chemistry this is my Field
ALIYU
field is a region of space under the influence of some physical properties
Collete
what is ogarnic chemistry
WISDOM Reply
determine the slope giving that 3y+ 2x-14=0
WISDOM
Another formula for Acceleration
Belty Reply
a=v/t. a=f/m a
IHUMA
innocent
Adah
pratica A on solution of hydro chloric acid,B is a solution containing 0.5000 mole ofsodium chlorid per dm³,put A in the burret and titrate 20.00 or 25.00cm³ portion of B using melting orange as the indicator. record the deside of your burret tabulate the burret reading and calculate the average volume of acid used?
Nassze Reply
how do lnternal energy measures
Esrael
Two bodies attract each other electrically. Do they both have to be charged? Answer the same question if the bodies repel one another.
JALLAH Reply
No. According to Isac Newtons law. this two bodies maybe you and the wall beside you. Attracting depends on the mass och each body and distance between them.
Dlovan
Are you really asking if two bodies have to be charged to be influenced by Coulombs Law?
Robert
like charges repel while unlike charges atttact
Raymond
What is specific heat capacity
Destiny Reply
Specific heat capacity is a measure of the amount of energy required to raise the temperature of a substance by one degree Celsius (or Kelvin). It is measured in Joules per kilogram per degree Celsius (J/kg°C).
AI-Robot
specific heat capacity is the amount of energy needed to raise the temperature of a substance by one degree Celsius or kelvin
ROKEEB
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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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