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WARRIOR [948]
3 years ago
10

What are the two sources of thermal energy in Earth’s interior?

English
2 answers:
erastovalidia [21]3 years ago
6 0

Answer:

The two sources of thermal energy in Earth's interior is radiogenic heat and primordial heat.

Explanation:

The radiogenic heat produced by the radioactive decay of isotopes in the mantle and crust, and the primordial heat left over from the formation of Earth.

sp2606 [1]3 years ago
4 0

Answer:

heat from the decay of radioactive elements.

frictional heating, caused by denser core material sinking to the center of the planet

Explanation:

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How did people redefine the word American during the 20th century
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Answer:

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In the early decades of the 20th century the American people benefited from industrial growth while also experiencing its adverse effects. Cheap labor and assembly-line manufacturing made mass production possible. Railroad networks carried the mass-produced goods, many of them the result of new technologies, around the country. Montgomery Ward, J.C. Penney, and other retailers expanded their operations and laid the foundation for the consumer-driven society that evolved later in the century. Materially, city dwellers' standards of living improved steadily, not only in food, shelter, housing, and other material goods, but also in health care and education. Inexpensive books, magazines, newspapers, and improved public libraries, funded in part through the benevolence of Andrew Carnegie, contributed to their intellectual lives. Sexual fulfillment in marital relationships continued to gain importance, and family life increasingly reflected the ideals of companionship. Silent films and amateur and professional sports helped fill leisure time. The Boy Scouts and Girl Scouts, founded in 1908 and 1910, provided recreational and educational opportunities for children.

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Explanation:

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