An Isolated Black Hole in Empty Intergalactic Space Would Be

question 17

Multiple Choice

An isolated black hole in empty intergalactic space would be difficult to detect because

• A)there would be no stars behind it whose light would be affected by gravitational lensing.
• B)it could not emit light from inside its event horizon.
• C)no companion stars would be affected by its gravitational field.
• D)no matter would be falling into it to create an X-ray-emitting accretion disk.
• E)All of the other choices are correct.

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Definitions:

Pretax Income

Income earned by an entity before any taxes have been deducted.

Operating Leverage

The degree to which a firm or project can increase operating income by increasing revenue, reflecting the fixed versus variable cost structure.

Clockworks Co.

A hypothetical or generic name that could be used to refer to a company specializing in mechanical devices, especially those involving gears and timekeeping mechanisms.

Contribution Margin Ratio

The ratio that indicates the percentage of each sale that exceeds the variable costs, calculated by subtracting variable costs from sales revenue and dividing by sales revenue.