As Measured from the Earth,a Spacecraft Is Moving at Speed

question 4

Multiple Choice

As measured from the Earth,a spacecraft is moving at speed 0.80c toward a second spacecraft moving at speed 0.60c back toward the first spacecraft.What is the speed of the first spacecraft as viewed from the second spacecraft?

• A)0.81c
• B)0.95c
• C)0.38c
• D)0.20c

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Definitions:

Urinalysis

An analysis of the urine; a test performed on urine to determine its characteristics.

Audiometer

A device to measure the degree of hearing ability.

Rinne Test

A hearing test that compares air conduction to bone conduction of sound, used to evaluate loss of hearing in one or both ears.

Weber Test

A tuning fork test used in audiology to assess hearing loss by determining whether sound is heard better in one ear than the other.