In Their Common Rest Frame, Two Stars Are 90

question 7

Multiple Choice

In their common rest frame, two stars are 90.0 light-years (ly) apart. If they are 12.0 ly apart as measured by the navigator in a spaceship traveling between them, how fast is the spaceship moving? Express your answer in terms of c.

• A) 0.991c
• B) 0.986c
• C) 0.980c
• D) 0.972c

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Definitions:

Hairdressers

Professionals trained in cutting, styling, and treating hair.

Natural Monopoly

A market condition where a single company can provide goods or services at a lower cost than any potential competitor, leading to a monopoly due to natural market forces.

Positive Externality

A benefit that affects a party who did not choose to incur that benefit, often associated with public goods and services.

Patent Laws

Regulatory legal frameworks designed to protect the rights of inventors by giving them exclusive rights to their inventions for a certain period.