The frequency of the middle C on the piano is 261.6 Hz. What is the wavelength of sound with this frequency as it travels in air at room temperature? (Take the speed of sound to be 344 m/s)
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- dolphins make sounds in air and water. What is the ratio of the wavelength λa of a sound in air at sea level to its wavelength λs in seawater if the speed of sound in water at that specific location is 1530 m/s and the air temperature is 10.00 ∘C? λa/λs=A stretched string has a fundamental frequency of 780 Hz. What is the fundamental frequency if the tension is increased by a factor of 3.00?If the vocal tract of a human is considered a closed tube 17 cm in length, what is the frequency of what would become the second harmonic? Consider 340 m/s as the speed of sound. The answer must be in Hz units.
- An organ pipe is open at both ends. It is producing sound at its n = 3 harmonic, the frequency of which is 164 Hz. Take the speed of sound to be 345 m/s. What is the length of the pipe?Standing at a crosswalk, you hear a frequency of 540 Hz from the siren of an approaching ambulance. After the ambulance passes, the observed frequency of the siren is 435 Hz. Determine the ambulance's speed from these observations. (Take the speed of sound to be 343 m/s.)A sound wave with a frequency of 9800 Hz travels along a copper pipe. If thewavelength is 0.370 m and the density of copper is 8.9 x 10^3 kg/m^3, what is the elastic modulus of copper?
- The ear canal can be thought of as a tube leading from the outer ear to the ear drum that is closed at one end. The typical length of an adult human ear canal is 2.5 cm. What is the fundamental resonant frequency of the ear canal? Assume the air inside it is at body temperature (37°C).What is the length in meters of a closed organ pipe with a fundamental frequency of 27 Hz? State your answer to the nearest m. The speed of sound in air is 343 m/s.