An aircraft flies directly overhead at an altitude of 5 km. If the sound of the aircraft is heard 6 s later, determine the speed and Mach number of the aircraft. Assume an average air temperature of 10°C.
Q: The noise level in an empty examination hall is 42 dB. When 50 physics students are writing an exam,…
A:
Q: The speed of sound in air is 331 m/s at atmospheric pressure and 0 Celsius. Suppose you put a…
A: we know that
Q: In the upper atmosphere at altitudes where commercial airlines travel, we find extremely cold…
A: Given data *The given temperature is T = -470 C = (-47 +273) K = 226 K
Q: A noise level meter reads the sound level at the emergency ward to be 85 dB. What is sound…
A:
Q: A typical sound level for a buzzing mosquito is 35 dB, and that of a vacuum cleaner is approximately…
A: Given, sound level for a buzzing mosquito=35dB sound level for vacuum cleaner=65dB
Q: The noise a lawn mower produces is 80 dB. How much noise is from 12 identical lawn mowers?
A: Noise = 80dB Let I is the intensity of one lawn mowers , Then for 12 lawn mowers, the intensity is…
Q: You hear a sound of (4.8x10^1) decibels. What is the intensity? Give your answer in microwatts/m2…
A: β = 4.8×10 decibels Threshold of human hearing is , Io = 1×10-12 W/m²
Q: A brand of earplugs reduces the sound intensity level by 27 dB. By what factor do these earplugs…
A:
Q: Picnickers see a lightning flash and hear the resulting thunder 7.8 s later. If the storm is…
A: Speed is given by, V=dt...................(1) Where, V=velocity d=distance…
Q: of
A: In the doppler effect, the frequency of waves varies when the source and observer move closer or…
Q: But suppose the distance increases by the factor 4.3. (A) Now what is the change in sound intensity?…
A: Given, the distance increases by a factor 4.3, let the initial distance be r1 and the new distance…
Q: When a person wears a hearing aid, the sound intensity level increases by 24.4 dB. By what factor…
A:
Q: What is the speed of sound in air at a temperature of 31 degrees Celsius? O a O b Oc Od 332 m/s 362…
A: We know speed of sound is different in different temperature and the formula for calculating it is ,…
Q: You hear a sound of (4.0x10^1) decibels. What is the intensity? Give your answer in microwatts/m2…
A: Given data: Intensity level (β) = 4.0 × 101 dB Threshold of hearing (I0) = 1.0×10-12 W/m2 1 μW =…
Q: L = 10 log (7) where I is the intensity of sound in watts per square metre 10-¹2 W/m². Determine the…
A: Given that:L=10 log (IIo)Io=10-12 W/m2L=100 dB
Q: The speed of sound at sea-level is 340.29 m/1 second. If lightning strikes 10.0 miles away, how many…
A: According to question we need to find the value of time take for you to hear sound ?
Q: Crickets produce a musical chirping sound at a frequency around 10,000 Hz (very high pitched)! The…
A: Answer :- Given Frequency of sound (f) = 10000 Hz Wavelength (λ) = 0.03 m Speed of sound = V…
Q: The velocity of sound in air at sea level is above 1100 feet per second. If a man hears a clap of…
A:
Q: he noise a lawn mower produces is 80 dB. How much noise is from 10 identical lawn mowers?
A: Given: The sound level of the lawnmower is 80 dB. The number of identical lawnmowers is 10.
Q: The sound intensity of a jet engine, measured in watts per meter squared (W/m2), is inversely…
A: Given, The sound intensity of a jet engine, measured in watts per meter squared (W/m2) I∝1d2where d…
Q: A typical sound level for a buzzing mosquito is 39 dB, and that of a vacuum cleaner is approximately…
A:
Q: The table gives an estimate for the sound intensity of a whisper at 1.0 m. What is the sound…
A:
Q: A group of hikers hears an echo 4.00 s after shouting. How far away is the mountain that reflected…
A:
Q: Picnickers see a lightning flash and hear the resulting thunder 8.6 s later. If the storm is…
A:
Q: We can estimate the length of an aluminum fence by comparing the sound heard through the fence and…
A:
Q: Air temperature in the Sahara Desert can reach 56.0°C (about 134°F). What is the speed of sound,…
A:
Q: The noise a lawn mower produces is 80 dB. How much noise is from 11 identical lawn mowers?
A: Given Noise produced by one lawn mower =80dB No of lawn mowers x=11
Q: An osprey (a type of hawk) has a distinct call: a whistle at 2100 Hz. An osprey calls while diving…
A: Frequency of whistle , fo = 2100 Hz Frequency of whistle heard , f= 2400 Hz Speed of sound , V = 343…
Q: The noise a lawn mower produces is 80 dB. How much noise is from 8 identical lawn mowers?
A: Given , the noise a single lawn mower produces Is 80 dB Let I is the intensity of one lawn mower,…
Q: You see condensed steam expelled from a ship whistle 4.948 seconds before you hear the sound. If the…
A:
Q: A sound source creates a sound intensity at a certain distance. If the sound intensity is increase…
A:
Q: The noise a lawn mower produces is 80 dB. How much noise is from 2 identical lawn mowers?
A: Given: β1=80 dB
Q: The area of a typical eardrum is about 5.0 × 10–5m2 . Calculate the sound power (the energy per…
A: It is given that,
Step by step
Solved in 2 steps with 2 images
- There was an accident and NASA engineers are trying to sort out where two of their Mars Rovers, Tango and Foxtrot, have landed. The engineers know that landing site A is much hotter than landing site B. Unfortunately, the only working sensors on Tango and Foxtrot measure the speed of sound. If Tango measures the speed of sound at it's landing site as 240 m/s, while Foxtrot measures speed of sound as 258 m/s at it's landing site, where has each rover landed?The figure shows a series of sound waves leaving a moving source. B E с Rank the locations by frequency heard by a stationary listener at each letter location. lowest D and E V E highest COn a workday, the average decibel level of a busy street is 70 dB, with 100 cars passing a given point every minute. If the number of cars is reduced to 25 every minute on a weekend, what is the decibel level of the street?
- The relationship between the number of decibles B and the intensity I in watts per square meteris denoted by the equation B = 10log(10^12 x I). If the intensity of a given sound is increased by a factor of 100, by how much does the number of decibels increase?While rolling down a hill, you produce a pitch of 387 Hz while honking on your horn. A stationary car blows it's horn at the same frequency. The combined sound of the two horns is 49 Hz. How do we calculate my speed in this scenario?A person holds a rifle horizontally and fires at a target. The bullet leaves the muzzle of the rifle with a velocity of 460m/s. Two seconds later the person hears the bullet strike the target. If the speed of sound in air is 340 m/s, calculate the distance travelled from the bullet to the target.
- The sound intensity of a jet engine, measured in watts per meter squared (W/m2), is inversely proportional to the square of the distance between the engine and an airport ramp worker. For a certain jet, the sound intensity measures 0.6 W/m2 at a distance of 8 meters from the ramp worker. What is the sound intensity (in W/m2) for a ramp worker 10 meters from the jet?On the planet Arrakis, a male ornithoid sings at a frequency of 1180 Hz. When flying toward her mate at a speed of 30 m/s, a female ornithoid hears the sound at a frequency of 1250 Hz. What is the speed of sound in the atmosphere of Arrakis?a noise level meter reads the sound level in a room to be 85 dB. What is the intensity of sound in W/m^2?
- The noise a lawn mower produces is 80 dB. How much noise is from 3 identical lawn mowers?The intensity of sound is measured on the decibel scale, dB. The equation dB=10logI represents the decibel level, where I is the ratio of the sound to the human hearing threshold.On a construction site, a large sheet of steel is dropped on the ground. The noise it makes is 100,000 times greater than the human hearing threshold. To the nearest whole number, what is the decibel value of the noise?A bystander hears a siren vary in frequency from 590 Hz to 368 Hz as a fire truck approaches, passes by, and moves away on a straight street. What is the speed of the truck? (Take the speed of sound in air to be 343 m/s.)