if the ruler is plucked while it is held with 25 cm of it off the table, does it make sound? if there is no sound, look for the reason why it is so
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If the ruler is plucked while it is held with 25 cm of it off the table, does it make any sound? ... so, frequency is less and hence pitch of the sound is low and hence low pitch sound is produced by a blade. conclusion: More is shrillness of sound more is the pitch and it has more frequency.
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