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Q. show that the motion of simple pendulum is simple harmonic and hence derive an equation for its time period .what is its seconds pendulum
Q. The least count of a stop watch is 1/5 second. The time of 20 oscillations of a pendulum is measured to be 25 seconds. The maximum percentage error in the measurement of time will be?
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The period of revolution of an earth satellite close to surface of earth is 90 min. The time period of another satellite in an orbit at a distance of three times the radius of earth from its surface will be
360 min
720 min
270 min