A country's relations with other countries
Gears are supposed to be softer than worms or pinions so they don't cause as much wear. Each tooth of a worm or pinion meshes with the teeth of the gear many more times in it's life than a tooth on the larger gear, two hard teeth meshing will wear more than a hard ans soft teeth. Having a steel gear would cause the worm to wear out too fast. Ideally the worm wheel should be phosphor bronze but bronze is expensive and plastic is cheap.
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Answer:
This is partially related to the fact that people at older ages produce less emissions and that a reduction of the proportion of people in the labor force tends to slow the growth in the size of the economy.
Explanation:
Answer: C. Industrialization created factory jobs in urban areas while eliminating agricultural jobs in rural areas.
Explanation:
In the late 19th century, industrialization was in full swing and technology was being created that made farming more efficient. This led to a loss of jobs for people in the rural areas who depended mostly on farming.
These people then had to move to urban areas where industrialization had led to the construction of factories that required more labor. This significantly increased rural to urban migration.
