Q: One of the loudest sounds in recent history was that made by
One of the loudest sounds in recent history was that made by the explosion of Krakatoa on August 26–27, 1883. According to barometric measurements, the sound had a decibel level of 180 dB at a distanc...
See AnswerQ: A sound wave from a siren has an intensity of 100.
A sound wave from a siren has an intensity of 100.0 W/m2 at a certain point, and a second sound wave from a nearby ambulance has an intensity level 10 dB greater than the siren’s sound wave at the sam...
See AnswerQ: A person wears a hearing aid that uniformly increases the intensity level
A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies of sound by 30.0 dB. The hearing aid picks up sound having a frequency of 250 Hz at an intensity of...
See AnswerQ: The area of a typical eardrum is about 5.0 x
The area of a typical eardrum is about 5.0 x 10-5 m2. Calculate the sound power (the energy per second) incident on an eardrum at (a) The threshold of hearing and (b) The threshold of pain.
See AnswerQ: The toadfish makes use of resonance in a closed tube to produce
The toadfish makes use of resonance in a closed tube to produce very loud sounds. The tube is its swim bladder, used as an amplifier. The sound level of this creature has been measured as high as 100....
See AnswerQ: A trumpet creates a sound intensity level of 1.15 X
A trumpet creates a sound intensity level of 1.15 X 102 dB at a distance of 1.00 m. (a) What is the sound intensity of a trumpet at this distance? (b) What is the sound intensity of five trumpets at t...
See AnswerQ: There is evidence that elephants communicate via in-frasound, generating
There is evidence that elephants communicate via in-frasound, generating rumbling vocalizations as low as 14 Hz that can travel up to 10.km. The intensity level of these sounds can reach 103 dB, measu...
See AnswerQ: Earthquakes at fault lines in Earth’s crust create seismic waves, which
Earthquakes at fault lines in Earth’s crust create seismic waves, which are longitudinal (P - waves) or transverse (S - waves). The P-waves have a speed of about 7 km/s. Estimate the average bulk modu...
See AnswerQ: A family ice show is held at an enclosed arena. The
A family ice show is held at an enclosed arena. The skaters perform to music playing at a level of 80.0 dB. This intensity level is too loud for your baby, who yells at 75.0 dB. (a) What total sound i...
See AnswerQ: A 250-m-long bridge is improperly designed so that
A 250-m-long bridge is improperly designed so that it cannot expand with temperature. It is made of concrete with α = 12 x 10-6 (°C)-1. (a) Assuming the maximum change in temperature at the site is ex...
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