USA HISTORY

Detailed explanation-1: -The Industrial Revolution was energized by coal and eventually by petroleum and natural gas. Fossil fuels that drive steam and electrical engines made possible a huge increase in the amount of productive energy available to humans.

Detailed explanation-2: -A synergy between iron and steel, railroads and coal developed at the beginning of the Second Industrial Revolution. Railroads allowed cheap transportation of materials and products, which in turn led to cheap rails to build more roads.

Detailed explanation-3: -Petroleum also became an important source of energy during this time, due to the development of new extraction and refining technologies. These new energy sources helped to power the factories and machines of the second industrial revolution, making it one of the most important periods in the history of energy.

Detailed explanation-4: -The second Industrial Revolution is usually dated between 1870 and 1914, although a number of its char-acteristic events can be dated to the 1850s. It is, however, clear that the rapid rate of pathbreaking inventions (macroinventions) slowed down after 1825, and picked up steam again in the last third of the century.

Detailed explanation-5: -Among the most influential and far-reaching innovations of the Second Industrial Revolution was the internal combustion engine. First introduced in 1878, it was powered by gas and air, which made it impractical for widespread public use.