In a Cepheid Variable, What Happens to Make the Temperature

question 4

Multiple Choice

In a Cepheid variable, what happens to make the temperature decrease?

• A) Massive solar flares release great amounts of energy, after which the star goes through a partial collapse.
• B) Hydrogen fusion in the shell begins to shut down because it is running low on fuel.
• C) A periodic eruption of sunspots blocks the radiation from below.
• D) The ionized helium layer expands and cools.

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Definitions:

Simple Delivery Contract

A type of contract involving the transfer of ownership of specific goods or property from the seller to the buyer upon delivery.

Merchant

An individual or business entity engaged in the selling and purchasing of goods or services.

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An incoterm meaning "Free on Board," which indicates that the seller is responsible for goods until they are loaded on a shipping vessel, at which point the responsibility shifts to the buyer.

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A term used in contracts to specify the responsibilities of buyers and sellers regarding the transportation of goods.