How Did Astronomers Discover the Relationship Between Spectral Type and Mass

question 35

Multiple Choice

How did astronomers discover the relationship between spectral type and mass for main sequence stars?

• A) by measuring stellar radii with very powerful optical telescopes
• B) by measuring stellar radii with very powerful radio telescopes
• C) by comparing stars with the same spectral type but different luminosities
• D) by using computer models of hydrogen fusion and stellar structure
• E) by measuring the masses and spectral types of main-sequence stars in binary systems

Grasp the significance of groundwater and aquifers in freshwater supply.

Learn about the effects of large-scale projects on water displacement and ecosystems.

Understand the principles behind water conservation techniques and infrastructure.

Acknowledge the relationship between water usage patterns and water-saving measures in residences.

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Definitions:

Quantity Effect

The change in the quantity demanded or supplied as a result of changes in price, holding all else constant.

Price Effect

The impact on consumer demand and supply of goods or services caused by a change in the price of those goods or services.

Perfectly Elastic

Describes a situation where the quantity demanded or supplied can change infinitely with any small change in price.

Price

The total monetary value expected, obliged, or handed over in exchange for something.