f sound in air at 20 oC is 344 m/s. (a) What is the wavelength of a sound wave with a frequency of 784 Hz, corresponding to the note on a piano, and how many milliseconds does each vibration take? (b) What is the wavelength of a sound wave one octave higher than the note in part (a)?
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The speed of sound in air at 20 oC is 344 m/s. (a) What is
the wavelength of a sound wave with a frequency of 784 Hz, corresponding
to the note on a piano, and how many milliseconds
does each vibration take? (b) What is the wavelength of a sound
wave one octave higher than the note in part (a)?
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- A cyclist is using a loudspeaker to measure her speed. She cycles directly towards the loudspeaker which emits a sound with a constant frequency 261 Hz. The cyclist measures the frequency to be 269 Hz. You should assume that the speed of sound in air is 335 m s-¹. (a) Calculate the speed of the cyclist. (b) Describe briefly what the cyclist will hear as she passes the loudspeaker.Standing at a crosswalk, you hear a frequency of 570 Hz from the siren of an approaching ambulance. After the ambulance passes, the observed frequency of the siren is 488 Hz. Determine the ambulance's speed from these observations. (Take the speed of sound to be 343 m/s.)A flute is designed so that it plays a frequency of 268.2 Hz, when all the holes are covered and the temperature is 18.2°C. (a) What is the speed of sound in the flute? A flute is designed so that it plays a frequency of 268.2 Hz, when all the holes are covered and the temperature is 18.2°C. (b) What is the wavelength of the first harmonic? Consider the flute to be a pipe open at both ends A flute is designed so that it plays a frequency of 268.2 Hz, when all the holes are covered and the temperature is 18.2°C. (c)Consider the flute to be a pipe open at both ends and find its length, assuming this frequency is the fundamental frequency A flute is designed so that it plays a frequency of 268.2 Hz, when all the holes are covered and the temperature is 18.2°C. A second player, nearby in a colder room, also attempts to play middle C on an identical flute. A beat frequency of 3.00 beats/s is heard. (e) What is the speed of sound in the second room? A flute is designed so that it plays a…
- a sound source of frequency 600 hz is moving towards an observer with a velocity of 20 m/s the speed of sound is 340 m/s the frequency heard by observer will beThe speed of sound in a solid medium is 15 times greater than that in air. If the frequency of a wave in the solid is 25 kHz, then what is the wavelength? (The speed of sound in air is 344 m/s.)A train is moving away from an observer at a speed of 50 m/s with its whistle on, the frequency of the whistling sound being 400 Hz. What should be the approximate frequency heard by a stationary observer? Take the speed of sound as 345 m/s when atmospheric temperature is 24°C. 328 Hz 310 Hz 380 Hz 349 Hz