An Isolated Black Hole in Empty Intergalactic Space Would Be

question 56

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 above.

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Definitions:

Marginal Cost

The increase in total cost that arises from an extra unit of production.

Elasticity

A measure of how much the quantity demanded or supplied of a good responds to a change in price or other factors.

Long-run Profit

The amount of financial gain achieved over a longer period, taking into account all fixed and variable costs.

Market Demand Curve

Curve relating the quantity of a good that all consumers in a market will buy to its price.