These Objects Are No Longer Considered a Good Explanation for the Dark

question 6

Multiple Choice

These objects are no longer considered a good explanation for the dark matter in the halo.

• A) WIMPs
• B) MACHOs
• C) black holes
• D) clouds of cool, neutral hydrogen
• E) brown dwarfs

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Definitions:

Principal

The initial sum of money placed in an investment or lent out, excluding any interest or earnings.

Treasury Bill

Short-term government securities issued at a discount from the par value and mature without additional interest.

Simple Interest

Interest computed solely on the initial sum, or on the unpaid balance of that initial sum.

Yield

The income return on an investment, such as the interest or dividends received, expressed as an annual percentage of the investment cost.