The Galaxy Has Become Enriched in Heavy Elements Since It

question 56

Multiple Choice

The galaxy has become enriched in heavy elements since it formed.What is responsible for the enrichment?

• A)Nuclear reactions in interstellar clouds
• B)The infall of heavy elements from intergalactic space
• C)The transformation of cosmic rays into heavy elements
• D)Nuclear reactions in stars,followed by stellar mass loss

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Definitions:

Rationally

Making choices that are consistent and in line with one's self-interest, guided by the use of reason and available information.

Sealed-Bid

A type of auction or tender where bidders submit confidential offers, and usually, the highest bid wins without the bids being disclosed to other participants.

Second-Price Auction

In a second-price auction, the highest bidder wins but pays the price bid by the second-highest bidder, encouraging participants to bid their true value.

Expected Revenue

The anticipated amount of money a business expects to receive over a certain period, usually as a result of sales or services.