As Measured from Earth, the Spectrum of the Galaxy NGC

question 42

Multiple Choice

As measured from Earth, the spectrum of the galaxy NGC 7512 reveals a receding velocity of about 7,000 km/s.If an observer in that galaxy takes a spectrum of the Milky Way they would
Measure ________.

• A) the same 7,000 km/s receding speed
• B) only 1,000 km/s, because for that observer the Hubble expansion is a lot slower
• C) something that we cannot possibly know, because the known laws of physics apply only within the Milky Way
• D) 23,000 km/s, because the speed of light has a different value for that observer
• E) no relative motion, because we are in fact measuring Earth's motion about the Sun.

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Definitions:

Access Control

Access control is a security technique that regulates who or what can view or use resources in a computing environment.

Encryption

The method of transforming data or information into a coded format to safeguard against unauthorized entry.

RFID

Stands for Radio-Frequency Identification, a technology used to identify and track tags attached to objects using electromagnetic fields.

Automatically Logs

The process by which a system records events, transactions, or activities without manual intervention.