5. You are investigating the power output of a speaker to ensure it is safe to use at an outdoor concert. You can treat the speaker as a point source generating spherically symmetric waves and you can assume the waves do not reflect off any nearby surfaces. a) When you are 7.5 m from the speaker, your ears encounter an intensity of 0.11 W/m². An intensity of 1 W/m² is often used as a threshold for pain. How much closer can you get to the speaker before your ears begin to hurt? b) On average, how much power is the speaker supplying? Using the average power, about how much energy does the speaker supply in 2 seconds? c) At the concert, you know that audience members are planned be 2 m closer to the speaker than how close you could get without experiencing pain (your answer to part a). You decide to decrease the power supplied by the speaker to ensure the closest audience members do not encounter pain. What should you adjust the power output of the speaker to be?

5. You are investigating the power output of a speaker to ensure it is safe to use at an outdoor concert. You can treat the speaker as a point source generating spherically symmetric waves and you can assume the waves do not reflect off any nearby surfaces. a) When you are 7.5 m from the speaker, your ears encounter an intensity of 0.11 W/m². An intensity of 1 W/m² is often used as a threshold for pain. How much closer can you get to the speaker before your ears begin to hurt? b) On average, how much power is the speaker supplying? Using the average power, about how much energy does the speaker supply in 2 seconds? c) At the concert, you know that audience members are planned be 2 m closer to the speaker than how close you could get without experiencing pain (your answer to part a). You decide to decrease the power supplied by the speaker to ensure the closest audience members do not encounter pain. What should you adjust the power output of the speaker to be?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Related questions

Q: A point source is generating (3D) spherical waves. The intensity of these waves at a distance of…

A: Initial distance , r1 = 3.6m Initial intensity at r1, I1 = I W/m2 r2 = 7.2m

Q: ! Required information college a Amazon.com: Otter... https://www.sprint.c... Saved Contact Form…

A: The problem is asking us to find the average power incident on a pupil of diameter 8.60 mm when the…

Q: 63. Two loudspeakers located along the x-axis as shown in Figure P16.63 produce sounds of equal…

A: If we assume that the cones of the speakers move in phase with each other, we can say that the sound…

Q: A girl is playing a trumpet. The sound waves produced are traveling through air to your ear. Which…

A: This problem can be solved using basic properties of sound waves

Q: 1. Two out of phase loudspeakers are some distance apart. A person stands 5.60 m from one speaker…

A: Speed of sound in air v= 340m/s

Q: B. A wave traveling at 550 m/s strikes a boundary between two different kinds of material. If it…

Q: Satellite TV is broadcast from satellites that orbit 37,000 kmkm above the earth's surface. Their…

A: Area is given as, Power si given as, P = 15 MW.

Q: What is the gravitational potential energy of a 50 N bird at a height of 50 meters? A. 2500 J…

A: Given Data : The weight of the bird is given as W = 50N. The height of the bird is given as H = 50m.

Q: Party hearing. As the number of people at a party increases, you must raise your voice for a…

Q: Energy from the Sun arrives at the top of the Earth's atmosphere with an intensity of 1.3 kW/m². How…

A: Given, the intensity of the energy from the Sun arriving at the top of the Earth's atmosphere: I =…

Q: 6. A 10.0-Hz waterwave travels from deep water, where its speed is 38.0 cm/s, to shallow water,…

A: Given: Frequency of waterwave, f=10.0 Hz Speed in deep water, vd=38.0 cm/s Speed in shallow water,vs…

Q: A metal guitar string has a linear mass density of µ = 3.100 g/m. What is the speed of transverse…

Q: Which of the following conditions guarantees that two overlapping waves will exhibit the property of…

A: QUESTION 7 We have given that, Which of the following conditions guarantees that two overlapping…

Q: 2. Light is a wave that travels at a speed of 3 x 108 m/s. The different colors that we see are…

Q: 5. The distance between Planet X and a star is 1.2 x 1011 m. At the surface of Planet X, the average…

A: Given information, distance, r= 1.2×1011 m Intensity ,I= 5355 W/m2 Average power = Intensity × 4πr2

Q: When the temperature of a substance decreases, what happens to its molecules? Oa The molecules…

A: Temp. has significant effect on the Kinetic energy

Q: 5. A pipe with one end open and one end closed produces a fifth harmonic frequency of 1760 Hz at 20…

A: Answer is Option (c) The expression for find length of the pipe is f5=5v2LL=5v2f

Q: In a pond two Water Skeeterbugs are taping their antennae on the water surface simultaneously and in…

Concept explainers

Stretched string

A stretched string is a wire which is made up of any metal that must have a larger length compared to its thickness. The ends of the wire are fixed, and when they oscillate or are plucked, it produces two reflected transverse waves of the same frequency and same amplitude. The waves or pulses are traveling in alternate directions and superimpose with one another. This waveform is named standing or stationary waves.

Question

5. You are investigating the power output of a speaker to ensure it is safe to use at an outdoor concert. You can treat
the speaker as a point source generating spherically symmetric waves and you can assume the waves do not reflect off any
nearby surfaces.
a) When you are 7.5 m from the speaker, your ears encounter an intensity of 0.11 W/m². An intensity of 1 W/m² is often
used as a threshold for pain. How much closer can you get to the speaker before your ears begin to hurt?
b) On average, how much power is the speaker supplying? Using the average power, about how much energy does the
speaker supply in 2 seconds?
c) At the concert, you know that audience members are planned be 2 m closer to the speaker than how close you could get
without experiencing pain (your answer to part a). You decide to decrease the power supplied by the speaker to ensure
the closest audience members do not encounter pain. What should you adjust the power output of the speaker to be?

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step by step

Solved in 4 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions

A wire under a tension of 81N has a natural frequency of 256Hz. If the tension is raised to 121N.What will be the new frequency. ii.How many overtones can be found between 200Hz and 1024Hz for a wire whose fundamental frequency is 200Hz.
a) Show that H = Hoei(wt-kz)az Is a solution to the vector wave equation: 1 a²Ĥ = 0 c2 at2 v2 Η +
An intensity detector can be moved along a straight track. a source of spherical waves is placed at one end of the track. When the detector is 2 m away from the source, it measures an intensity of 80 W/m2. What distance do we need to move the detector from that position to get a measurement 13 dB lower? Answer: 6.95m
Under favorable conditions, the human eye can detect light waves with intensities as low as 2.50 × 10−12 W/m2. A) At this intensity, what is the average power incident on a pupil of diameter 8.20 mm in W B) If this light is produced by an isotropic source 15.5 m away, what is the average power emitted by the source? in W
An interface is formed between a block of aluminium (with an acoustic impedance of 1.8 x 107 kg m2 s') and a block of copper (with an acoustic impedance of 4.6 x 107 kg m-2 s-1). Longitudinal sound waves travelling through the aluminium are normally incident on the boundary, and are partially reflected. a) What is the ratio of the amplitude of the reflected wave to that of the incident wave? Number b) What is the ratio of the amplitude of the transmitted wave to that of the incident wave? Number c) What percentage of the incident power is transmitted? Number d) What percentage of the incident power is reflected? Number % Ouit P Sove Questi
Party hearing. As the number of people at a party increases, you must raise your voice for a listener to hear you against the background noise of the other partygoers. However, once you reach the level of yelling, the only way you can be heard is if you move closer to your listener, into the listener's "personal space." Model the situation by replacing you with an isotropic point source of fixed power Pand replacing your listener with a point that absorbs part of your sound waves. These points are initially separated by r = 1.10 m. If the background noise increases by Aß = 4.50 dB, the sound level at your listener must also increase. What separation rț is then required? Number i Units
At a temperature of 20.0o two speakers are sending sound waves of frequency 512 Hz and 2048 Hz respectively toward a door opening of width 90.0 cm. Which wave frequency experiences a greater diffraction angle upon passing through the opening? Group of answer choices a.the 512 Hz b.the 2048 Hz c.both about the same
A newly constructed spaceship has a length of 100.0 m (as measured in the rest frame). This spaceship departs the Earth, bound for a distant planet located a distance D = 50.0 light-years away from the Earth. It travels at a constant speed of v = 0.900c. Part A) As measured by Mission Control on Earth, how long does the journey take? Enter the numerical value in units of years. Part B) According to an astronaut on the spaceship, how long does the journey take? Enter the numerical value in units of years. Part C) As measured by Mission Control on Earth, what is the spaceship's apparent length? Enter the numerical value in SI units
A carbon-dioxide laser emits infrared light with a wavelength of 10.6 μm. Part A What is the length of a tube that will oscillate in the mmm = 210000 mode? Part B What is the frequency? Express your answer with the appropriate units. Part C Imagine a pulse of light bouncing back and forth between the ends of the tube. How many round trips will the pulse make in each second?