Q.

The time period of a pendulum when taken to the Moon would:

A. remain the same
B. decrease
C. become zero
D. increase
Answer» D. increase
Explanation: Since the pendulum rate will increase with an increase in gravity, and local gravity varies with latitude and elevation on Earth, pendulum clocks must be readjusted to keep time after a move. For example, a pendulum clock moved from sea level to 4000 feet will lose 16 seconds per day.
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