Two Identical Atomic Clocks Are Made

question 13

Multiple Choice

Two identical atomic clocks are made. One is placed in the foothills of the Rocky Mountains at the NIST in Boulder, Colorado, about one mile above the sea level, and the second is flown in a GPS satellite around Earth at about 17,000 mph. Which clock gets ahead of the other?

• A) The clock in orbit
• B) Both clocks run at the same rate.
• C) The Boulder clock

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