The emergence of rock-and-roll in the united states demonstrates <span>that cultural patterns are subject to change.
When rock-and-roll music first appeared in America, it was considered rude and obscene, and ungodly. Prior to that period, very different types of music were listened to. However, as times changed, new musical genres were introduced, and rock-and-roll was one of them, with Elvis Presley and the others. </span><span /><span>
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Parliament members usually get a position by persuading a political party to put their name on the ballot, and the voters choose between two or three national parties. On the other hand, a person comes into position in congress by running in a primary election, and political parties rarely affect the choice of who is nominated.
Two inventions from the World War two are the radar and the sonar, both of which had a huge impact in the war, but also after it, becoming a widely used devices all over the world.
The radar was an invention that was enabling detection of objects in the air. Initially it is was used for detection of planes, as that's where the biggest threat was coming. This device enabled the soldiers and the civilians to be warned about the oncoming danger, but also to be able to respond adequately to the threat.
The sonar was another invention inspired by the war. It had the same basic purpose as the radar, just that it was used for detecting objects in the water. This was a crucial instrument that gave the submarines big advantage in locating the enemy and destroying it, or if not capable of that, being able to move away and avoid it.
Answer:
The spread of the bubonic plague from Central Asia into Europe decimated the populations but increased opportunities for the survivors. An enormous variety of new consumer goods, agriculture, weaponry, religion, and medical science became available in Europe.
How did they affect India?
The Mongol Empire launched several invasions into the Indian subcontinent from 1221 to 1327, with many of the later raids made by the Qaraunas of Mongol origin. The Mongols occupied parts of the subcontinent for decades.
Who stopped the Mongols?
the attack by the Golden Horde, was led by a grandson of Genghis Khan, ended abruptly in AD 1242 with their unexplained retreat from Hungary.
How many people did the Mongols kill?
40 million people. Hope this helps :D
