1. Three factors that allowed the United States to rapidly industrialise were a wealth of natural resources, government support for business, and growing urban population that provided both cheap labor and markets for new products.
2. The invention that provided architects with the ability to build skyscrapers was steel.
3. The weight of large buildings being supported entirely by walls or by iron frames had hampered a building's height previously.
4. The harnessing of electricity transformed American business by allowing machines to be run by electric power (such as fans or printing presses), because it was inexpensive and convenient it became available in homes and spurred the invention of time-saving appliances, electric streetcars made cheap and efficient and also promoted the outward spread of cities, electricity allowed manufacturers to locate their plants where ever they wanted.
5. Women were affected by the inventions of the typewriter and the telephone because they were provided with new jobs as secretaries or operators.
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