Hot, Low-Density Gas Can Be Detected in Galactic Clusters Through

question 54

Multiple Choice

Hot, low-density gas can be detected in galactic clusters through X-ray emission. The gas is important in understanding dark matter because ____.

• A) dark matter is responsible for heating the gas
• B) dark matter must make the cluster massive enough to hold on to the hot gas
• C) the gas may be the source of dark matter
• D) the gas is clumped in empty places between galaxies where there is more dark matter
• E) the gas is produced by dark matter

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Definitions:

Marginal Tax Rate

The rate at which an additional dollar of income would be taxed, pertaining to the highest tax bracket of an individual or entity.

Pellet Mill

A machine or device for producing pellets from powdered material by pressing, forming, or extruding it, commonly used in the manufacturing of animal feed or wood pellets.

Marginal Tax Rate

The rate of tax that applies to the last dollar of the taxpayer's income, affecting additional income earned.

Salvage Value

The projected value at which an asset can be sold after its usage period has ended.