Protostars Are

question 48

Multiple Choice

Protostars are

• A) stars made almost entirely out of protons.
• B) objects with masses less than about 0.08 solar masses,which do not have enough mass to become true stars.
• C) old stars,contracting after using up all of their available hydrogen fuel.
• D) very young objects,still contracting before becoming true stars.

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Definitions:

Substitutes

Products or services that can be used in place of one another, where an increase in the price of one leads to an increased demand for the other.

Complements

Goods or services that are used together, where an increase in the consumption of one leads to an increase in the consumption of the other.

Law of Supply

The principle that, other things equal, an increase in the price of a good leads to an increase in the quantity supplied, and vice versa.

Price

The amount of money required to purchase a good or service, representing the value that consumers or buyers are willing to pay.