2 A wave has a speed of 50m/s and a wavelength of 25000m.What is the frequency of the wave? A 100 cm pipe is open at one end and closed at the other end. When air is blow at 150 Hz. Calculate

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13. A 100 cm pipe is open at one end and closed at the other end. When air is blow at 150 Hz. Calculate the
12. A wave has a speed of 50m/s and a wavelength of 25000m.What is the frequency of the wave?
velocity of the sound along the pipe?
14 The loudness of sound changes from Li= 30d to L2= 60db. What is the ratio of intensities / in
the two cases?
15 The sound level at a distance of 8m from a soeice is 240db. At what distance is the sound level 200ab?
Transcribed Image Text:13. A 100 cm pipe is open at one end and closed at the other end. When air is blow at 150 Hz. Calculate the 12. A wave has a speed of 50m/s and a wavelength of 25000m.What is the frequency of the wave? velocity of the sound along the pipe? 14 The loudness of sound changes from Li= 30d to L2= 60db. What is the ratio of intensities / in the two cases? 15 The sound level at a distance of 8m from a soeice is 240db. At what distance is the sound level 200ab?
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