What Is the Source of Energy That Allowed Supernova 1987A

question 71

Multiple Choice

What is the source of energy that allowed supernova 1987A to continue to brighten slowly for a few months after its initial explosion?

• A) Radioactive decay of specific nuclei produced in the explosion
• B) Thermonuclear reactions between iron nuclei and protons,neutrons,and helium nuclei
• C) Thermonuclear reactions between hydrogen nuclei in the shell of gas surrounding the supernova,triggered by the shock wave from the explosion
• D) Slow gravitational compression of the remnant core of the supernova and the consequent release of gravitational potential energy

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Definitions:

Eating Behavior

The range of psychological and physiological processes that influence how and what individuals consume for food.

Stimulus Discrimination

The learned ability to differentiate between similar stimuli and respond only to the original stimulus in conditioning.

Extinction

In behavior psychology, the gradual weakening and eventual disappearance of a conditioned response when the conditioned stimulus is no longer paired with the unconditioned stimulus.

Systematic Desensitization

Therapy technique that involves exposing a client to increasingly anxiety-producing stimuli or situations while having the client relax at the same time.