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If you find that the H-alpha line in a star's spectrum occurs at a wavelength of 656.45 nm, what is the star's radial velocity? Note that the rest wavelength of this line is 656.30 nm.
State
A political entity that possesses sovereignty over a geographic area and the people within it, with a structured system of governance.
U.S. Tax System
A structured framework by which the federal, state, and local governments in the United States collect taxes from individuals and businesses based on income, sales, property, and other financial activities.
Primary Federal Tax System
The principal tax collection mechanism of the federal government, including income, payroll, and corporate taxes.
Primary State
The initial or foundational level of government authority in a country, often responsible for key areas such as law enforcement and taxation.
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