An Astronomer Examining a Compact Object Could Conclude That It

question 61

Multiple Choice

An astronomer examining a compact object could conclude that it was a black hole if it _____.

• A) emits regular pulses of radiation
• B) has a defined event horizon that emits X-rays
• C) has an accretion disk
• D) has a mass greater than 1.4 solar masses
• E) has a mass greater than 3 solar masses

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Definitions:

Retrograde Amnesia

A loss of memory-access to events that occurred, or information that was learned, before an incident that caused the amnesia.

Global Amnesia

A rare condition involving a sudden and severe loss of memory, usually temporary, affecting the ability to recall recent and remote events.

Anterograde Amnesia

A loss of the ability to create new memories after the event that caused the amnesia, leading to a partial or complete inability to recall the recent past, while long-term memories from before the event remain intact.

Procedural Memories

A type of long-term memory that involves the skills and actions we have learned and can perform without consciously thinking about them.