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What makes heart cells beat together?
1850
A year marked by significant events such as the passage of the Fugitive Slave Act in the United States, as part of the Compromise of 1850.
Nullification
The theory that states have the right to invalidate any federal law deemed unconstitutional, emphasizing state sovereignty.
South Carolina
A state in the southeastern region of the United States, known for its history, cultural heritage, and role in the American Civil War.
Federal Laws
Legislation enacted by the national government of a country that applies to the entire nation.
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