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    Time dilation

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    Does time dilation mean that time actually passes more slowly in a moving inertial reference frame, or that it seems to move slower? Would a mechanical clock be affected by time dilation? If you are traveling away from Earth at 0.7c does your heart rate slow down?

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    https://brainmass.com/physics/relativistic-mechanics/time-dilation-45596

    Solution Preview

    You have just touched one of the most perplexing and fundamental concepts of relativity. The question is not simply if time moves slower in a moving reference frame but is actually who takes the measurement.

    For someone who is in a moving frame relative to another frame, everything ...

    Solution Summary

    The question is not simply if time moves slower in a moving reference frame but is actually who takes the measurement.

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