What initially prevented deep mining for coal in premodern times?

A. mines flooding with water
B. stale air in deep mines
C. seepage of flammable fumes into the mine shafts
D. antiquated tunneling techniques


Answer: A

History

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Tokugawa Japan's most important commercial center was __________

A) Tokyo B) Canton C) Nagasaki D) Osaka

History

The Ptolemaic model of the universe troubled Copernicus mainly because

a. it disagreed with observations of the planets. b. it contradicted the Biblical cosmology. c. its mathematics was so complex. d. it contradicted Aristotle's cosmology. e. it lacked internal consistency.

History

_________ was the first state that withdrew from the Union. a. Mississippi B. Alabama C. Georgia D. South Carolina

Fill in the blank(s) with correct word

History

The Coercive Acts were intended to punish Massachusetts for the Boston Tea Party

a. true b. false

History