Questions from College Physics

Q: In certain ranges of a piano keyboard, more than one string

In certain ranges of a piano keyboard, more than one string is tuned to the same note to provide extra loudness. For example, the note at 1.10 x 102 Hz has two strings at this frequency. If one string...

Q: The G string on a violin has a fundamental frequency of 196

The G string on a violin has a fundamental frequency of 196 Hz. It is 30.0 cm long and has a mass of 0.500 g. While this string is sounding, a nearby violinist effectively shortens the G string on her...

Q: Two train whistles have identical frequencies of 1.80 x 102

Two train whistles have identical frequencies of 1.80 x 102 Hz. When one train is at rest in the station and the other is moving nearby, a commuter standing on the station platform hears beats with a...

Q: Two pipes of equal length are each open at one end.

Two pipes of equal length are each open at one end. Each has a fundamental frequency of 480. Hz at 300. K. In one pipe the air temperature is increased to 305 K. If the two pipes are sounded together,...

Q: A student holds a tuning fork oscillating at 256 Hz. He

A student holds a tuning fork oscillating at 256 Hz. He walks toward a wall at a constant speed of 1.33 m/s. (a) What beat frequency does he observe between the tuning fork and its echo? (b) How fast...

Q: The surface of the Sun has a temperature of about 5800 K

The surface of the Sun has a temperature of about 5800 K. The radius of the Sun is 6.96 x 108 m. Calculate the total energy radiated by the Sun each second. Assume the emissivity of the Sun is 0.986....

Q: If a human ear canal can be thought of as resembling an

If a human ear canal can be thought of as resembling an organ pipe, closed at one end, that resonates at a fundamental frequency of 3.0 x 103 Hz, what is the length of the canal? Use a normal body tem...

Q: Some studies suggest that the upper frequency limit of hearing is determined

Some studies suggest that the upper frequency limit of hearing is determined by the diameter of the eardrum. The wavelength of the sound wave and the diameter of the eardrum are approximately equal at...

Q: Calculate the reflected percentage of an ultrasound wave passing from human muscle

Calculate the reflected percentage of an ultrasound wave passing from human muscle into bone. Muscle has a typical density of 1.06 x 103 kg/m3 and bone has a typical density of 1.90 x 103 kg/m3.

Q: A typical sound level for a buzzing mosquito is 40 dB,

A typical sound level for a buzzing mosquito is 40 dB, and that of a vacuum cleaner is approximately 70 dB. Approximately how many buzzing mosquitoes will produce a sound intensity equal to that of a...