The Nova Phenomenon, an Occasional and Sometimes Repeated Intense Brightening

question 27

Multiple Choice

The nova phenomenon, an occasional and sometimes repeated intense brightening of a star by a factor of about 10⁶, is caused by

• A) a beam of radiation from a nearby pulsar illuminating the surface of a red giant star and inducing rapid and intense heating.
• B) the capture and rapid compression of matter by a black hole.
• C) the explosion of a single massive star at the end of its thermonuclear fusion phases.
• D) explosive hydrogen fusion on the surface of a white dwarf star after mass transfer from a companion star in a binary system.

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Definitions:

Voting Common Stock

Shares that give the holder the right to vote on corporate matters.

Dividend

A payment made by a corporation to its shareholders, usually as a distribution of profits.

Net Income

The total profit of a company after all expenses and taxes have been deducted from revenues, indicating the company's financial performance over a specific period.

Significant Influence

A level of control in an investment relationship, generally assumed to exist if the investor holds 20% to 50% of the voting stock of the investee company.