Which of the Following Methods Used to Determine the Mass

question 60

Multiple Choice

Which of the following methods used to determine the mass of a cluster of galaxies does not depend on Newton's law of gravity?

• A) measuring the orbital velocities of galaxies in the cluster
• B) measuring the temperature of X-ray gas in the intracluster medium
• C) measuring the amount of distortion caused by a gravitational lens
• D) none of the above

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