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Sahay Sir > Question Answers > Cengage NEET by C.P Singh > Part 1 > Chapter 17 - Sound Waves > Vibrating tuning fork of frequency n is placed near the open end of a long cylindrical tube. The tube has a side opening and is fitted with a movable reflecting piston. As the piston is moved through 8.75 cm, the intensity of sound changes from a maximum to minimum. If the speed of sound is 350 m/s. Then n is

Vibrating tuning fork of frequency n is placed near the open end of a long cylindrical tube. The tube has a side opening and is fitted with a movable reflecting piston. As the piston is moved through 8.75 cm, the intensity of sound changes from a maximum to minimum. If the speed of sound is 350 m/s. Then n is

A thin plane membrane separates hydrogen at 7 degree C from hydrogen at 47 degree C both being at the same pressure. If a collimated sound beam travelling from the cooler gas makes an angle of incidence of 30 degree at the membrane the angle of refraction is