A Galaxy Cluster Consists of 1,000 Galaxies Within a Radius

question 36

Multiple Choice

A galaxy cluster consists of 1,000 galaxies within a radius of 2.5 Mpc,traveling at a typical velocity of 1,000 km/s.If the average stellar mass of a cluster galaxy is 10¹¹ M_Sun,what fraction of the cluster's mass is NOT stellar?

• A) 5/6
• B) 9/10
• C) 1/2
• D) 1/10

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Definitions:

NREM sleep

Non-Rapid Eye Movement sleep, which constitutes the majority of sleep time and is characterized by slower brain waves, reduced heart rate, and relaxed muscles.

Respirations

The act of breathing, which involves the inhalation and exhalation of air to facilitate gas exchange within the body.

Heart rate

The number of heartbeats per minute, a vital sign indicating the heart's efficiency and health status.

Polysomnogram

A comprehensive recording of the biophysiological changes that occur during sleep, used to diagnose sleep disorders.