A Protostar Becomes a Star When

question 51

Multiple Choice

A protostar becomes a star when:

• A) its luminosity reaches a maximum.
• B) its surface temperature reaches 5,000 K.
• C) it loses all its gravitational energy.
• D) nuclear fusion begins.

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Definitions:

Promissory Note

A finance-related instrument embodying a guarantee by one party to pay a certain party a designated sum of money, redeemable upon demand or on a specific forthcoming date.

Promissory Note

A written promise to pay a specified amount of money to a designated person at a specified date or on demand.

Electronic Components

Basic discrete devices or physical entities in an electronic system used to affect electrons or their associated fields.

Percent of Sales Method

A forecasting approach where future amounts are estimated as a fixed percentage of sales.