SELECT * FROM question_mgmt as q WHERE id=6540 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=12 AND subId=16 AND chapterId=376 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 8th science Sound a pendulum oscillates 40 times in 4 seconds find

Question:

A pendulum oscillates 40 times in 4 seconds. Find its time period and frequency.

Answer:

Number of oscillations of pendulum = 40

Time taken = 4 second

Frequency = Number of oscillation                                                                                                                                                                                                                                   Time taken

Frequency = 40/4 = 10 Hz


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