A tuning fork of 425 Hz resonates with a closed air column of length 20 cm (first resonance). The speed of sound is:

  1. 170 m/s
  2. 680 m/s
  3. 340 m/s
  4. 85 m/s
Answer

C) 340 m/s

lambda = 4L = 0.8 m; v = flambda = 340 m/s. SLO P-11-D-10 · Application

Physics MCQ · More Superposition, Stationary Waves and Beats MCQs · Practise