RR Lyrae Stars Are

question 275

Multiple Choice

RR Lyrae stars are

• A) pulsating stars that vary regularly, all with periods of less than 1 day.
• B) rotating neutron stars with very rapid and regular brightness fluctuations.
• C) eclipsing binary stars.
• D) pulsating stars that vary irregularly, with periods of several hundred days.

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Definitions:

Tariff

A tax on imports.

Subsidy

Financial support provided by the government to businesses, individuals, or other entities, aimed at promoting economic activities or ensuring the affordability of basic goods.

Tariffs

Taxes imposed by a government on imported goods in order to protect domestic industries or to generate revenue.

Quotas

A quota is a government-imposed trade restriction that limits the number or monetary value of goods that can be imported or exported during a specified period.