What Mechanism Is Believed to Produce Grand-Design Spiral Galaxies

question 26

Multiple Choice

What mechanism is believed to produce grand-design spiral galaxies?

• A) shock waves from explosive star formation in the nuclear bulge
• B) density waves in the interstellar medium
• C) satellite galaxies plunging through the disk of the nuclear spiral galaxy
• D) self-propagating star formation, where star formation occurs in bursts

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Definitions:

Comparative Negligence

A legal doctrine that reduces the amount of damages a plaintiff can recover in a negligence-based claim, based upon the degree to which the plaintiff's own negligence contributed to cause the injury.

Implied Assumption

An unstated understanding or presumption that underlies an agreement or contract, accepted as a term by the parties involved.

Risk Doctrine

A principle in law that assigns liability based on the foreseeable risk created by actions or negligence, particularly in situations where harm could have been prevented.

Action Of Negligence

A legal claim made against someone for harm caused by their failure to act as a reasonable person would under similar circumstances.