Examlex
An unstable particle produced in a high-energy collision is measured to have an energy of 483 MeV and an uncertainty in energy of 84 keV. Use the Heisenberg uncertainty principle to estimate the lifetime of this particle. ( = 1.055 × 10-34 J ∙ s = 6.59 × 10-16 eV ∙ s)
Supreme Court
The highest federal court in the United States, responsible for interpreting the Constitution and reviewing the validity of laws.
Lewis And Clark
Leaders of an expedition mandated by President Thomas Jefferson to explore the newly acquired Louisiana Territory and find a path to the Pacific Ocean (1804-1806).
Trans-Mississippi
Referring to the region of the United States that lies west of the Mississippi River.
Cotton Gin
A machine invented by Eli Whitney in 1793 to separate cotton fibers from their seeds, greatly impacting the cotton industry and increasing the demand for slave labor in the southern United States.
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