# Question: Your pulse rate is 70 beats min and your physics professor

Your pulse rate is 70 beats/min, and your physics professor in a spacecraft is moving with a speed of 0.85c relative to you.

(a) According to your professor, your pulse rate is (1) greater than 70 beats/min, (2) equal to 70 beats/min, (3) less than 70 beats/min. Why?

(b) What is your pulse rate, according to your professor?

(a) According to your professor, your pulse rate is (1) greater than 70 beats/min, (2) equal to 70 beats/min, (3) less than 70 beats/min. Why?

(b) What is your pulse rate, according to your professor?

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