You and a friend are watching fireworks that are launching from Grant Park.You are standing right in front of 624 S. Michigan Building (150 m from the launch area) and your friend is across campus at the Film Department (700 m from the launch area). The sound intensity at the Film Department is 0.2 W/m2. What is the sound intensity at your location, and how much power is the fireworks emitting?

I'm not sure how to solve this type of problem. Detailed steps would be very helpful, please.  The intensity of a sound wave is 100 W/m2 at a distance of 3 m. a. What is the intensity of the sound wave at a distance of 6 m? b. What is the intensity at 9 m?

A student hears a sound with a power of P = 42 μW. At their distance from the source, the sound has intensity I = 0.71 W/m2. A. Assuming the eardrum is circular, what is the radius of their eardrum, in meters?  B. Another student stands in the exact same location, but receives 20% more power from the same source. What is the radius of the second student's eardrums?

A loudspeaker on a pole at the same height as your ears is radiating 100 W of sound energy in all directions. You are walking directly toward the speaker at 0.60 m/s. Assume your ears are 20 m away from the loudspeaker itself and, although it is not realistic, ignore all reflections of sound from nearby objects such as the ground. What is the sound intensity level at the location of your ears? Express your answer with dB units. ► View Available Hint(s) B Submit Part B dß dt = Submit μÀ || Value What is the rate (dB/s) at which the sound intensity level is increasing? Hint: Use the chain rule and the relationship log₁0 x = ln x/ ln 10. Express your answer in decibels per second. ► View Available Hint(s) Units VE ΑΣΦ www ? ? dB/s

f. It is discovered that over this part of the track, the cars are experiencing friction forces of 100 N. If the length of the drop is 40 m, what is the total work done on a carriage weighing 200 kg? Oscillator Type Question: A ship uses a horn to signal to other ships. The horn emits a sound intensity measuring 120 dB at 1 m using a point detector, with a frequency of 150 Hz. The horn is at approximately sea level at a temperature of 10°C. a. If the reference intensity of sound in air is 1 pW/m², what is the total power of the horn? b. If the ambient sound of the ocean is about 50 dB, at what distance will the horn be difficult to hea How long will it take the sound of the horn to cover this distance if the air is mainly N2 with a molar mass of 28 g/mol and an adiabatic ratio of 7/5? C. d. A window measuring 2x3 m is placed 1 m from the horn. The window can withstand a maximum force of 100 N, will it be shattered by the sound if the reference pressure for sound in air is 20μPa? e. The…

A 1m tall vertical tube is filled with 20 degrees C of water.  A tuning fork vibrating at 561 Hz is held just over the top of the tube as the water is slowly drained from the bottom.   At what water heights, measured from the bottom of the tube, will there be a standing wave in the tube above the water? (If there is more than one answer, enter your answers in descending order.) h=  m

The figure below shows wave fronts of sound waves from the siren of a police car. Two people on both side of the car are running at 5 m/s to the left. The frequency of the siren is 400 Hz. The person on the left observes a frequency of 388.7 Hz. Speed of sound in air is 340 m/s. a) How fast is the policy car travelling? b) What is the frequency observed by the person on the right? c) What is the wavelength observed by the person on the righ? R

You live along the flight path of planes coming in for a landing at the airport. The intensity of sound waves from a plane's engines is 4.0  10-7 W/m2 when the plane is at an altitude of 10000 m.A. What is the power of the sound waves emitted by the engines (assuming the sound travels equally in all directions)?P =  _______ WB. What is the intensity of the sound waves emitted by the engines when the plane is at an elevation of 100 m?I =  ________ W/m2