The american railroad industry in the first half of the nineteenth century: a. stimulated the coal mining industry. b. was smaller in terms of total miles of track than the european rail system. c. encouraged entrepreneurs to begin building extensive canal systems for the first time. d. was exclusively in the north. e. mainly connected one waterway to another waterway.

Option: A. Stimulated the coal mining industry.

Explanation:

The industrialization in America began in 1800. With the availability of coal and other natural resources helped the industries to flourish. The railroad industry at the beginning of the 19th century supports coal mining industry to grow rapidly.  Coal became necessary fuel for railways to operate their engines as it became a cheap and efficient source of power for steam engines. As the coal mining expanded in 1900, some coal mine use new methods compared to the old technique of using picks and shovel to extract the coal.

travels along an axon. this triggers a wave of electrical activity that passes from the cell body along the length of the axon to the synapse

the correct answer is "pioneers carried all of their possessions on long and dangerous trails".

the first wave of pioneers travelled in 1842. they were merely 100 people. the next year that sum climbed to 1000 men, women, and children. these people travelled around 2,000 miles to oregon in the hopes of a better life. although the first part of the trip didn't present many obstacles, as time and miles went by they learnt that threat came from simple things, like becoming ill due to unclean water or bad food.

the weather didn't much, as wagons couldn't protect them from storms. as they travelled through the desert, the intense heat caused wood to shrink. their own lips abscessed and split because of the dry air. the only cure for this was to rub axle grease on their lips.

even crossing rivers was dangerous. sometimes wheels were damaged by unseen rocks on shallow water. mud didn't much either. pioneers were afraid of indian attacks, but there aren't many records of fights between pioneers and native americans. accidents happened because of negligence, exhaustion, guns, and bad weather.

history says that 1 of 10 pioneers who travelled to oregon didn't survive the journey. diseases spread fastly because they didn't have doctors and medical care was ofently improvised. one of the most deadly diseases they came upon was cholera, which became a worldwide pandemia.