Some Astronomers Searching for What the Mysterious "Dark Matter" Might

question 9

Multiple Choice

Some astronomers searching for what the mysterious "dark matter" might be made of have pinned their hopes on MACHO's (MAssive Compact Halo Objects) . What do they think these MACHO's are?

• A) huge concentrations of antimatter, outside of galaxies
• B) vast clouds of neutrinos, emitted by ancient supernovae
• C) black holes, brown dwarfs, and white dwarfs in the regions outside the main disk of our Galaxy
• D) "cannibal galaxies" that have swallowed smaller galaxy neighbors until they have grown very large
• E) large groups of college football players who have flunked astronomy, and now hang around the outskirts of town, just showing off their muscles

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Definitions:

Prototype Testing

The process of evaluating a preliminary model of a product to assess its performance, design, and reliability before it goes into mass production.

Batch Level Activity

Operations or tasks that are performed on groups of products together, typically as a step within the production process, where costs are incurred for the batch as a whole rather than for individual units.

Unit Level Activity

Activities that vary with the number of units produced or sold, directly impacting the cost of goods or services.

Direct Labour-Hours

The total hours worked by employees that can be directly attributed to the production of goods or services.