Edwin Hubble Found the Great Nebula in Andromeda (M31 Galaxy)

question 12

Multiple Choice

Edwin Hubble found the Great Nebula in Andromeda (M31 galaxy) to be very far away by

• A) comparing absolute to apparent magnitudes of Cepheid variable stars.
• B) comparing absolute to apparent magnitudes of RR Lyrae variable stars.
• C) measuring parallaxes of stars in M31.
• D) getting radar echoes off stars in M31.

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Definitions:

Efficiency Loss

The loss of economic efficiency that can occur when the balance between supply and demand is not achieved or when market conditions lead to a misallocation of resources.

Marginal Benefit

The additional satisfaction or utility gained by consuming or producing one more unit of a good or service.

Marginal Cost

The increase in cost that results from producing one additional unit of a good or service.

Efficiency Loss

The loss of potential economic welfare when resources are not optimally allocated, leading to outcomes where potential benefits exceed costs.