Question 9

Two speakers are situated 3 m apart, emitting pure sounds of 1100 Hz frequency towards each other. Along the line between the sources, how far apart are the minima caused by superposition of the sound waves? (The velocity of sound is 330 m/s.)

• A.    60 cm
• B.    30 cm
• C.    15 cm
• D.    7.5 cm
• E.    None of the above

Formula Sheet

Question 8

Question 10

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