If Most of the Mass of a Galaxy Is Located

question 17

Multiple Choice

If most of the mass of a galaxy is located near the center of the galaxy, then in the outer part of this galaxy the orbital speeds of stars must decrease with increasing distance from the center. This behavior would be equivalent to

• A) Newton's third law.
• B) Wien's law.
• C) Hubble's law.
• D) Kepler's third law.

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Definitions:

Marginal Tax Rates

The tax rate that applies to the next dollar of taxable income.

Vertical Equity

A principle in taxation that suggests taxpayers with a greater ability to pay should contribute more in taxes.

Ronald Reagan

The 40th President of the United States, serving from 1981 to 1989, known for his economic policies known as "Reaganomics".

Marginal Tax Rate

The rate at which the last dollar of income is taxed, indicating the proportion of any additional dollar of income that will be taken as tax.