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Q. |
Second’s pendulum is a pendulum which executes one oscillation in: |
A. | Half a second |
B. | One second |
C. | Two seconds |
D. | None of these |
Answer» C. Two seconds | |
Explanation: A pendulum is a weight suspended from a pivot so that it can swing freely. A seconds pendulum is a pendulum whose period is precisely two seconds; one second for a swing in one direction and one second for the return swing, a frequency of 1/2 Hz. |
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