10. A vibrating tuning fork is held above a column of air, as shown in the diagrams above. The reservoir is raised and lowered to change the water level, and thus the length of the column of air. The shortest length of air column that produces a resonance is L₁ = 0.25 m, and the next resonance is heard when the air column is L2=0.80 m long. The speed of sound in air at 20°C is 343 m/s and the speed of sound in water is 1490 m/s. 4₁ (a) Calculate the wavelength of the standing sound wave produced by this tuning fork. (1.1 m) 10. 296 omla The lo zubo Resonance 100 acowrie guc Note: Figure not draw Yravo zamu 18.8 shyp b) Calculate the frequency of the tuning fork that produces the standing wave, assuming the air is at 20°C.

10. A vibrating tuning fork is held above a column of air, as shown in the diagrams above. The reservoir is raised and lowered to change the water level, and thus the length of the column of air. The shortest length of air column that produces a resonance is L₁ = 0.25 m, and the next resonance is heard when the air column is L2=0.80 m long. The speed of sound in air at 20°C is 343 m/s and the speed of sound in water is 1490 m/s. 4₁ (a) Calculate the wavelength of the standing sound wave produced by this tuning fork. (1.1 m) 10. 296 omla The lo zubo Resonance 100 acowrie guc Note: Figure not draw Yravo zamu 18.8 shyp b) Calculate the frequency of the tuning fork that produces the standing wave, assuming the air is at 20°C.