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Yes I have, an eclipse can happen up to 3 times a year based on the earth and moons orbit. It is when the moon lines up with the sun in has the illusion of covering it. It can make certain parts of the earth look like its night time.
Explanation:
The mayor would operate the (Executive branch)
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The process of sharing results and working together to develop new hypotheses and experiments is known as collaboration.
Nullification is where a state has a right to disagree with a federal law they think is unconstitutional and not correct, and no longer abide by it. Nullification would have weakened the Union because states would no longer have to agree or act on certain laws, causing obvious conflict within the state and conflict between Congress and the state. The state would no longer be unified and a quarrel between people in the state, the states, and between the state and the Congress would deepen and would most likely lead to war and weaken the Union.
In Medieval Times humans were shorter and fatter while humans during the renaissance where tall and skinny yet unproportional