Suppose the X-Ray Signal from a Quasar Fluctuates with a Period

question 78

Multiple Choice

Suppose the X-ray signal from a quasar fluctuates with a period of 3 hours. What is the maximum size of the source?

• A) 150,000 km, about the diameter of Jupiter
• B) 10.8 au, about the diameter of Jupiter's orbit
• C) 4.5 ly, about the distance between the Sun and the nearest star
• D) 10,800 ly, a tenth the size of the Milky Way Galaxy

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Definitions:

Arrhythmia

An irregular heartbeat, which can be too fast, too slow, or with an irregular rhythm.

Arrhythmia

Arrhythmia refers to any change from the normal sequence of electrical impulses in the heart, leading to irregular heart rhythms.

Tachycardia

A condition characterized by an abnormally fast heart rate, typically defined as exceeding 100 beats per minute in adults.

Bradycardia

Slow heart rate.