If the 19th century science was defined by certainty, and what ways do these documents undermine that certainty? do any of these authors see this loss of the certainty as a good thing? why or why not?

If 19th-century science is defined by certainty, the experiments with advanced technology and the scientific studies would have been the poof of certainty.

19th century was a period when many ideas, theories and inventions were developing. This era was also known as a modern era of science. The result of the discovering and experimenting would have been recorded in the Journal, some of them still exist. So, there wouldn't have been any loss, whatever the scientists were putting forward were seen in the public. Some of the examples are the Steam Engine, Charles Darwin Theories, telegraph and telephone, medicines.

the correct answers are the following

a proxy war which functioned as a training field for wwii

republican democratic goverment

national side, leaded by the fascist general franco

the spanish civil war took place between 1936 and 1939 and was fought after a military coup undertaken on the 17th july 1936 by a group of generals that had seceeded from the spanish republican army, under the leadership of general franco, and who aimed to expel the democractically-elected republican goverment from power.

this war became a proxy war in which european powers tested their military equipment. on one side, urss and mexico supported the left-wing republican spanish goverment, while nazi germany and fascist italy supported the national fascist side.

franco managed to win the war in 1939, with the significant contribution of the foreign military support, and became the dictator of spain until his death in 1975.

explanation:

mark brainliest and have a great day!

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