One Star Has a Surface Temperature of 6000 K and Another

question 31

Multiple Choice

One star has a surface temperature of 6000 K and another has a surface temperature of 7000 K. If the two stars have the same absolute luminosity, and if the radius of the 6000 K star is R₆ and the radius of the 7000 K star is R₇, what is the ratio R₆/ R₇?

• A)0.7
• B)1.2
• C)1.4
• D)1.6
• E)1.9

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Definitions:

Group Purchasing

The aggregation of purchasing orders from many buyers so that a volume discount can be obtained.

Aggregate Demand

The total demand for all goods and services within an economy at a given overall price level and in a given time period.

Lower Prices

A strategy or condition where the cost of goods or services is reduced to attract customers or gain a competitive edge in the market.

Stored-value Money

A type of electronic money that is stored on a card or a digital wallet, representing a claim on a predefined amount of currency.