The Hubble Law Is One of the Most Important Relations

question 70

Multiple Choice

The Hubble law is one of the most important relations in modern astronomy because it ____.

• A) allows astronomers to measure the distance to very distant galaxies using only their spectrum
• B) explains the difference in the types of galaxies seen in different directions
• C) relates the rotation curve of a galaxy to the amount of dark matter it contains
• D) connects the mass of a spiral galaxy's bulge to the size of its central black hole
• E) determines the mass of a cluster using the rotation period of the galaxies it contains

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Definitions:

Complex Sugars

Carbohydrates that consist of long chains of sugar molecules, such as fiber and starches, offering sustained energy.

Stretch Receptors

Sensory receptors that detect stretching within muscles and other tissues, sending signals to the nervous system to inform about movement and position.

Urinary Reflex

The automatic process managing the flow of urine from the bladder, involving signals between the brain and urinary system.

Sphincters

Circular muscles that maintain constriction of a natural body passage or orifice and that relax as required by normal physiological functioning.