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Mama L [17]
2 years ago
13

Please help ill mark brainliest​

History
1 answer:
Lelechka [254]2 years ago
6 0

Answer and Explanation:

The three types of heat transfer are called conduction, convection and irradiation.

Conduction occurs with the contact between two bodies and with the agitation of the molecules. Warmer bodies have molecules in intense agitation. When a colder body comes into contact with that warmer body, the movement of molecules in the hot body affects the movement of molecules in the colder body, causing the heat between the two bodies to be shared.

Convection occurs in liquids and gases. This type of heat transmission occurs through circular currents, called convection currents, these currents are created through the difference in density between the coldest part of a liquid or gas and the warmest part. These currents cause the warmest, least dense part to rise, while the coldest and most dense part go down. This cycle is repeated several times, until all the liquid or gas has the same temperature.

Irradiação: Essa transmissão de calor é feita através das ondas eletromagneticas que são liberadas por qualquer corpo que possui temperatura. Essa transmissão de calor não necessita de contato direto entre os corpos, já que essas ondas se propagam através do espaço, até mesmo no vacuo.

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America's indigenous traditions of immigration and freedom created the context that made European colonization possible. Since time immemorial, the original inhabitants of the Americas were accustomed to dealing with strangers. They forged alliances and exchange networks, accepted political refugees, and permitted people in need of land and protection to settle in territories that they controlled but could share. No North American society was cut off from the world or completely autonomous. Thus, there was no question about establishing ties with the newcomers arriving from Europe. Initially arriving in small numbers, bearing valuable items to trade, and offering added protection from enemies, these Europeans could, it seemed, strengthen indigenous communities. They were granted rights to use certain stretches of land, much in the way that other Native American peoples in need would have been, especially in eighteenth-century Pennsylvania. However, Europeans, and all they brought with them—disease, beliefs regarding private property, ever more immigrants, and, occasionally, ruthless violence—undermined indigenous liberty. When Native Americans contested this, wars erupted—wars they could not win. Those who were able to avoid living as slaves or virtual servants of the Europeans (as some did) were driven from their homes.

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For Africans, as with Native Americans, liberty was inseparable from one's family ties. Kinship (whether actual or fictive) gave an individual the rights and protection necessary to be able to live in freedom. To be captured by enemies and separated from one's kin put a person in tremendous danger. Although some captives could be adopted into other societies and treated more or less as equals, most were reduced to a condition of slavery and had little influence over their destiny. Even before they arrived in North America, Africans brought to the New World as slaves had already been separated from their home communities within Africa. Without kin, they had to forge new relationships with complete strangers—and everyone, including most fellow Africans they encountered, was a stranger—if they were to improve their lot at all. Escape was very difficult, and no community of fugitive slaves lasted for long. Unlike Native Americans, who could find a degree of freedom by moving away from the frontier, Africans had to struggle for what liberty they could from within the British society whose prosperity often depended on their forced labor.

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