A Spaceship Approaches Earth with a Speed 0

question 49

Multiple Choice

A spaceship approaches Earth with a speed 0.38c. A passenger in the spaceship measures his heartbeat as 72 beats per minute. How many beats per minute are observed in the telemetry radio signals received on Earth? Note that, in addition to time dilation, one must take into account that the signals of successive heartbeats have to travel shorter distances because the spaceship is moving closer (Doppler Effect) .

• A) 75
• B) 107
• C) 48
• D) 100
• E) 67

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Definitions:

Eardrum

A thin membrane that separates the outer ear from the middle ear and vibrates in response to sound waves, aiding in the process of hearing.

Auditory Cortex

The region of the brain responsible for processing and interpreting sounds.

Deafness

The condition of lacking the power of hearing or having impaired hearing.

Left Ear

The ear located on the left side of the head, responsible for receiving audio signals and transmitting them to the brain.