An astrolabe is a primitive angle-measuring tool. It can be used to - very in-exactly! - measure the altitude above the horizon of a celestial body like the Sun, Moon or Polaris in order to calculate your position.
Medieval gunners used the astrolabe to calculate the height of towers and buildings, in order to more accurately aim their cannons.
Answer:
C
Explanation:
The nullification crisis was a conflict between the U.S. state of South Carolina and the federal government of the United States in 1832–33. ... Calhoun, who opposed the federal imposition of the tariffs of 1828 and 1832 and argued that the U.S. Constitution gave states the right to block the enforcement of a federal law.
D) European social and political reform movements erupted
Explanation:
Almost as soon as the effects of Industrial Revolution became permanent many social and political reform movements sprang up all across Europe looking for greater freedom and rights.
<u>This happened because now the population could see the exploitation within closed quarters of each other and it was easier to mobilize in the cities.</u>
<u>The scholarly response to Industrial Revolution also called for the dignity of man</u> and safeguard of his rights as he became more of a cog of a machine.
<span>The northern Sudanese demanded that the southern Sudanese convert to Islam.
Northern Islamic leaders ruled Sudan under Islamic law and those living in the South were Christian and animistic faiths. The beginning of Islamic law started a civil war as the South was ready to be independent from Islamic law. </span>
