Questions from Modern Physics

Q: The frequency of the note F4 is 349 Hz. (

The frequency of the note F4 is 349 Hz. (a). If an organ pipe is open at one end and closed at the other, what length must it have for its fundamental mode to produce this note at 20.0C? (b). At wha...

Q: Two identical loudspeakers are located at points A and B, 2

Two identical loudspeakers are located at points A and B, 2.00 m apart. The loudspeakers are driven by the same amplifier and produce sound waves with a frequency of 784 Hz. Take the speed of sound in...

Q: A bat flies toward a wall, emitting a steady sound of

A bat flies toward a wall, emitting a steady sound of frequency 1.70 kHz. This bat hears its own sound plus the sound reflected by the wall. How fast should the bat fly in order to hear a beat frequen...

Q: The sound source of a ship’s sonar system operates at a frequency

The sound source of a ship’s sonar system operates at a frequency of 18.0 kHz. The speed of sound in water (assumed to be at a uniform 200C) is 1482 m/s. (a). What is the wavelength of the waves emit...

Q: A 2.00-MHz sound wave travels through a pregnant

A 2.00-MHz sound wave travels through a pregnant woman’s abdomen and is reflected from the fetal heart wall of her unborn baby. The heart wall is moving toward the sound receiver as the heart beats. T...

Q: Horseshoe bats (genus Rhinolophus) emit sounds from their nostrils and

Horseshoe bats (genus Rhinolophus) emit sounds from their nostrils and then listen to the frequency of the sound reflected from their prey to determine the prey’s speed. (The “horseshoe” that gives th...

Q: A police siren of frequency fsiren is attached to a vibrating platform

A police siren of frequency fsiren is attached to a vibrating platform. The platform and siren oscillate up and down in simple harmonic motion with amplitude Ap and frequency fp. (a). Find the maximum...

Q: Standing sound waves are produced in a pipe that is 1.

Standing sound waves are produced in a pipe that is 1.20 m long. For the fundamental and first two overtones, determine the locations along the pipe (measured from the left end) of the displacement no...

Q: A turntable 1.50 m in diameter rotates at 75 rpm

A turntable 1.50 m in diameter rotates at 75 rpm. Two speakers, each giving off sound of wavelength 31.3 cm, are attached to the rim of the table at opposite ends of a diameter. A listener stands in f...

Q: A long, closed cylindrical tank contains a diatomic gas that is

A long, closed cylindrical tank contains a diatomic gas that is maintained at a uniform temperature that can be varied. When you measure the speed of sound v in the gas as a function of the temperatur...