A Nova Is an Explosion Involving a White Dwarf

question 131

Multiple Choice

A nova is an explosion involving a white dwarf. Can a white dwarf become a nova more than once? Why or why not?

• A) No. The white dwarf's magnetic field is eliminated in the explosion.
• B) Yes. A white dwarf can become a nova more than once if its temperature is high enough for recurrent helium flashes in the core.
• C) Yes. A white dwarf can become a nova more than once if it continues to receive matter from a companion star.
• D) No. The white dwarf is destroyed in the explosion.

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Definitions:

Learned Helplessness

A psychological condition in which an individual becomes passive and unable to avoid adverse situations or stimuli after repeated exposure to uncontrollable events.

Bipolar Disorder

An emotional health issue distinguished by pronounced swings in mood, ranging from high (mania or hypomania) to low phases (depression).

Depressive Episodes

Periods characterized by a significant and persistently low mood, diminished interest or pleasure in most activities, often accompanied by other symptoms like changes in appetite, sleep disturbances, and feelings of guilt or worthlessness.

Manic Episodes

Periods of abnormally elevated mood and high energy, often characterized by excessive talkativeness, decreased need for sleep, and risky behavior, commonly seen in bipolar disorder.