Stars Whose Intrinsic Brightness and Period of Variation Are Related

question 47

Multiple Choice

Stars whose intrinsic brightness and period of variation are related are called

• A)pulsars.
• B)Cepheid variables.
• C)main-sequence stars.
• D)red giants.

---

Definitions:

Multilateral Approach

A strategy involving multiple countries working together on a given issue or project, often used in international relations, trade agreements, and environmental policies.

Free Trade

A financial strategy that permits the trade of goods and services across borders without significant restrictions, tariffs, or bans.

Free Trade

The unrestricted purchase and sale of goods and services between countries without the imposition of constraints such as tariffs, duties, and quotas.

Living Standards

The magnitude of economic riches, comfort levels, material acquisitions, and basic livable needs assigned to a particular social strata or region.