1.An average factory has a sound intensity level of 80 dB, and a riveting machine has...
1.An average factory has a sound intensity level of 80 dB, and a
riveting machine has a sound intensity level of 120 dB. How many
times greater is the sound intensity of the machine than that of
the factory?
⨯
2.Compute the wavelength of the radio waves from the following stations.
(a) an AM station operating at a frequency of 690 kHz
m
(b) an FM station with a frequency of 96.3 MHz
m
3.How far does light travel in one year? [This distance is known
as a light-year (ly) and is used in measuring astronomical
distances.]
km
4.(a) Approximately how long would it take a telephone signal to
travel 3060 mi from coast to coast across the United States?
(Telephone signals travel at about the speed of light.)
s
(b) Approximately how long would it take a radio signal to reach
the International Space Station (ISS) at an orbital altitude of 350
km?
s
Homework Answers
Add Answer to:
1.An average factory has a sound intensity level of 80 dB, and a
riveting machine has...
1. If a sound of frequency 1000 Hz has intensity level 30 dB, what would be...
1. If a sound of frequency 1000 Hz has intensity level 30 dB,
what would be the intensity level of sound frequency 50 Hz which
appears to have equal loudness? (Answer= 60 dB)
2. Intensity of 30 dB, 1000 Hz sound= (Answer= 1.000 x 10-9
W/m^2)
*3. What is intensity (in W/m^2) of the equal loudness 50 Hz
sound? (Answer is NOT 50.12 x 10^-12)
*4. What is the ratio of the pressure variation (in amplitude)
of the equal loudness...
Using a frequency-measuring lab device, I am to map out the sound intensity level distribution (dB)...
Using a frequency-measuring lab device, I am to map out the sound intensity level distribution (dB) in a room (both with & without music playing) to create a 5x5 grid of 25 data points. Using the following data table of sound intensity level β(dB) and corresponding intensity I(W/m2), I also need to find the intensity to the nearest order of magnitude for the points on my sound intensity level maps. Here is the data table: Intensity levelβ(dB) Intensity I(W/m2) Example/effect...
A.Determine the sound level heard by the guitarist when one speaker is operating .Units dB B.Determine...
A.Determine the sound level heard by the guitarist when one
speaker is operating .Units dB
B.Determine the sound level heard by the guitanist when both
speakers are operating .Units dB
A. The frequency of the signal as determined by the motor
vehicle .Units MHz
B.The frequency determined by the radar speed gun for the
signal reflected back to it by the motor vehicle .Units :Hz
Two identical speakers are positioned the same distagce from a guitarist. The intensity of sound...
3. A trumpet creates a sound intensity level of 1.15*102 dB at a distance of 1.00...
3. A trumpet creates a sound intensity level of 1.15*102 dB at a distance of 1.00 m. I. What is the sound intensity of a trumpet at this distance? II. What is the sound intensity of five trumpets at this distance? III. Find the sound intensity of five trumpets at the location of the first row of an audience, 8.00 m away, assuming, for simplicity, the sound energy propagates uniformly in all directions. IV. Calculate the decibel level of the...
Problem 1: Birds on tree One bird can sing with the sound intensity level of 5...
Problem 1: Birds on tree One bird can sing with the sound intensity level of 5 dB measured by the listener near the tree. Suppose there are many birds on the tree which all sing in phase with the same amplitude and frequency. The same listener measures the sound intensity level 25 dB at the same position as before. How many birds arc there on the trec? (i) 10 (ii) 25 iv) 50 v) 100
please answer A and B 10 branchest 58-1600 M 106 poesie abatt 1-1301 Mtor 100 plus...
please answer A and B
10 branchest 58-1600 M 106 poesie abatt 1-1301 Mtor 100 plus 10 10 16 10 Frequency HE B. FM radio broadcasts a frequency from 88.1 MHz to 108.1 MHz. show work for (8) 1. What is the wavelength range? b. How long does it take for the radio signal to travel 100. Km?
phons 100 9 80 60 A 40 20 20 10k 1000 100 10 Frequency Hz) a) At approximately what frequency is the human ear most sensitive? How can you tell? b) If you heard a 300-Hz tone with a sound level of 60...
phons 100 9 80 60 A 40 20 20 10k 1000 100 10 Frequency Hz) a) At approximately what frequency is the human ear most sensitive? How can you tell? b) If you heard a 300-Hz tone with a sound level of 60 dB, approximately how many phons would you perceive? toward you with a speed v, starting a distance of 1 km away att 0. If the train moves very slowly (that is, v is extremely small compared to...
1. The speed of sound in an alcohol at a temperature of 20°C is 1260 m/s....
1. The speed of sound in an alcohol at a temperature of 20°C is 1260 m/s. The density of the alcohol at that temperature is 650 kg/m^3. At a temperature of 20°C, find the bulk modulus of the alcohol. 1030 MPa 1080 MPa 1140 MPa 1190 MPa 1240 MPa 2. During a thunderstorm, you hear the sound 4 s after you see the lightning flash. How far did it fall? Assume the temperature outside is approximately 20 1.324 km 1.372...
Problem 1 The Ohio State Marching Band (TBDBITL) is rehearsing for a half time show. They...
Problem 1 The Ohio State Marching Band (TBDBITL) is rehearsing for a half time show. They begin by tuning their instruments so that everyone plays with the same pitch. The lead trumpet player sustains an 'A' at 440 Hz. The band members join in one by one and if the new player is off pitch, a beat frequency is heard. (A) The second trumpet player comes in playing slightly out of tune at 443 Hz. What is the beat frequency...
Problem 1 The Ohio State Marching Band (TBDBITL) is rehearsing for a half time show. They...
Problem 1 The Ohio State Marching Band (TBDBITL) is rehearsing for a half time show. They begin by tuning their instruments so that everyone plays with the same pitch. The lead trumpet player sustains an ‘A’ at 440 Hz. The band members join in one by one and if the new player is off pitch, a beat frequency is heard. (A) The second trumpet player comes in playing slightly out of tune at 443 Hz. What is the beat frequency...
1. If a sound of frequency 1000 Hz has intensity level 30 dB,
what would be the intensity level of sound frequency 50 Hz which
appears to have equal loudness? (Answer= 60 dB)
2. Intensity of 30 dB, 1000 Hz sound= (Answer= 1.000 x 10-9
W/m^2)
*3. What is intensity (in W/m^2) of the equal loudness 50 Hz
sound? (Answer is NOT 50.12 x 10^-12)
*4. What is the ratio of the pressure variation (in amplitude)
of the equal loudness...
A.Determine the sound level heard by the guitarist when one
speaker is operating .Units dB
B.Determine the sound level heard by the guitanist when both
speakers are operating .Units dB
A. The frequency of the signal as determined by the motor
vehicle .Units MHz
B.The frequency determined by the radar speed gun for the
signal reflected back to it by the motor vehicle .Units :Hz
Two identical speakers are positioned the same distagce from a guitarist. The intensity of sound...
Problem 1: Birds on tree One bird can sing with the sound intensity level of 5 dB measured by the listener near the tree. Suppose there are many birds on the tree which all sing in phase with the same amplitude and frequency. The same listener measures the sound intensity level 25 dB at the same position as before. How many birds arc there on the trec? (i) 10 (ii) 25 iv) 50 v) 100
please answer A and B
10 branchest 58-1600 M 106 poesie abatt 1-1301 Mtor 100 plus 10 10 16 10 Frequency HE B. FM radio broadcasts a frequency from 88.1 MHz to 108.1 MHz. show work for (8) 1. What is the wavelength range? b. How long does it take for the radio signal to travel 100. Km?
phons 100 9 80 60 A 40 20 20 10k 1000 100 10 Frequency Hz) a) At approximately what frequency is the human ear most sensitive? How can you tell? b) If you heard a 300-Hz tone with a sound level of 60 dB, approximately how many phons would you perceive? toward you with a speed v, starting a distance of 1 km away att 0. If the train moves very slowly (that is, v is extremely small compared to...
Problem 1 The Ohio State Marching Band (TBDBITL) is rehearsing for a half time show. They begin by tuning their instruments so that everyone plays with the same pitch. The lead trumpet player sustains an 'A' at 440 Hz. The band members join in one by one and if the new player is off pitch, a beat frequency is heard. (A) The second trumpet player comes in playing slightly out of tune at 443 Hz. What is the beat frequency...
Problem 1 The Ohio State Marching Band (TBDBITL) is rehearsing for a half time show. They begin by tuning their instruments so that everyone plays with the same pitch. The lead trumpet player sustains an ‘A’ at 440 Hz. The band members join in one by one and if the new player is off pitch, a beat frequency is heard. (A) The second trumpet player comes in playing slightly out of tune at 443 Hz. What is the beat frequency...
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