The Astronaut Whose Heart Rate on Earth Is 60 Beats/min

question 24

Multiple Choice

The astronaut whose heart rate on Earth is 60 beats/min increases his velocity to v = 0.80 c.Now what is his heart rate as measured by an Earth observer?

• A)36 beats/min
• B)48 beats/min
• C)75 beats/min
• D)100 beats/min

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