Variable Stars,such as Cepheid Variables and RR Lyrae Stars,are Used

question 41

Multiple Choice

Variable stars,such as Cepheid variables and RR Lyrae stars,are used in what important measurement in astronomy?

• A) Keeping of accurate time
• B) Measurement of the gravitational fields of supermassive black holes by their effect upon the star's pulsation rate
• C) Measurement of the surface temperatures of stars
• D) Measurement of distances to galaxies

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Definitions:

Rent Controls

Government-imposed laws that limit the rent landlords can charge tenants, aiming to keep housing affordable.

Equitable Way

Equitable way refers to a manner or approach that is fair, impartial, and just, ensuring equal treatment and opportunities for all involved parties.

Binding Price Floor

A minimum price set by the government above the equilibrium price, causing a surplus of the product in the market.

Equilibrium Price

The price at which the quantity of a good or service demanded by consumers equals the quantity supplied by producers.