Which of the Following Is Necessary to Measure the Distance

question 53

Multiple Choice

Which of the following is necessary to measure the distance to a galaxy with Hubble's law?

• A) the Doppler effect formula
• B) resolving a Cepheid variable in the galaxy
• C) the size of the solar system
• D) the rotation velocity of the galaxy

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Definitions:

Online Course

An educational course offered entirely over the internet, allowing students to learn remotely.

Sample Size

The quantity of subjects or units selected from a population to participate in a research study, determining the study's ability to detect a significant effect.

T Procedure

A statistical method typically used to test hypotheses when the sample size is small and the population variance is unknown, involving the t-distribution.

Approximately Normal

Describes a distribution that closely follows a normal distribution, often used as an assumption in statistical tests.