The intensity at a distance of a 6.0 m from a source that is radiating equally in all direction...
Question:
The intensity at a distance of a 6.0 m from a source that is radiating equally in all direction is {eq}1.6 \times 10^{-9} {/eq} W/m{eq}^2 {/eq}. What is the intensity level in dB?
Intensity Level in Decibel:
Let the intensity of sound for which the intensity level is zero be {eq}I_0 {/eq}.
Let the intensity of a certain sound be {eq}I {/eq}.
Then, the intensity level of this particular sound in decibel will be given by:
{eq}\displaystyle{L = 10 \ \log\left(\dfrac{I}{I_0}\right)} {/eq}
Answer and Explanation: 1
Become a Study.com member to unlock this answer! Create your account
View this answerGiven & Known
- The intensity of the sound: {eq}I = 1.6\times 10^{-9} \ \rm W/m^2 {/eq}.
- The intensity of the sound of zero intensity level:...
See full answer below.
Ask a question
Our experts can answer your tough homework and study questions.
Ask a question Ask a questionSearch Answers
Learn more about this topic:
Get access to this video and our entire Q&A library
Intensity in Physics: Definition & Measurement
from
Chapter 5 / Lesson 10
13K
This lesson explains what wave intensity in physics is, and it explains the intensity of light formula with examples. This lesson also describes how to calculate intensity of sound waves.
Related to this Question
- At a distance of 19 m from a sound source the intensity level is 98 dB. What is the intensity level (in dB) at a point 3.7 m from the source? Assume that the source radiates equally in all directions.
- At a distance of 15 m from a sound source, the intensity level is 60 dB. What is the intensity level (in dB) at a point of 2.0 m from the source? Assume that the source radiates equally in all directi
- The intensity of sound is x W/m^2 at a distance of 5 m from the source. What is the intensity of the sound at a distance of 20 m from the source?
- The intensity of a sound is x W/m^2 at a distance of 5 m from the source. What is the intensity of the sound at a distance of 20 m from the source?
- At a distance of 12.0 m from a point source, the intensity level is measured to be 60 dB. At what distance from the source will the intensity level be 30 dB?
- At 25 m from a sound source, the intensity level is 55 dB. What's the level at distance of 56 m? What's the level at distance of 273 m?
- The intensity of sound from a point source is 1.0 \times 10^{-8} W/m^{-2} at a distance of 5.0 m from the source. What will be the intensity at a distance of 25 m from the source?
- At a distance 1.5 m from a point source of sound the intensity level is measured to be 102 dB. What is the sound power in watts produced by the source?
- A certain source of sound waves radiates uniformly in all directions. At a distance of 20 m from the source, the intensity level is 51 dB. a) What is the intensity (in W/m^2) of the sound waves at that distance from the source? (Note: The reference inten
- A certain source of sound waves radiates uniformly in all directions. At a distance of 20 m from the source, the intensity level is 51 dB. What is the total acoustic power output of the source, in watts? (Note: The reference intensity I_0 is 1.0 times 10^
- At a distance of 2.00 m from a point source of sound, the intensity level is 80.0 dB. At a distance of 4.00 m from this source, the intensity level will be closest to (a) 60.0 dB (b) 40.0 dB (c) 74.0 dB (d) 20.0 dB (e) 77.0 dB
- The intensity of sound is x W/m2 at a distance of 5 m from the source. What is the intensity of the sound at a distance of 20 m from the source?
- The intensity at a distance of 6 m from a source that is radiating equally in all directions is 6.0\times 10^{-10} W/m^2. What is the power emitted by the source? a) 2.1 X 10-6 W b) 2.7 X 10-5 W c) 2.7 X 10-7 W d) 2.1 X 10-8 W
- If the intensity of sound at a 5 m distance is 50\ \rm{W/m^2}. Calculate the Intensity at a distance of 20 m.
- A spherical source radiates sound uniformly in all directions. At a distance of 18m, the sound intensity level is 10^-4W/m^2. a) At what distance from the source is the intensity 10^-7W/m^2? b) What p
- By measurement you determine that sound waves are spreading out equally in all directions from a point source and that the intensity is 2.4 X 10^-2 W/m^2 at a distance of 4.3 m from the source. a) Wh
- By measurement you determine that sound waves are spreading out equally in all directions from a point source and that the intensity is 3.0 x 10^{-2} W/m^{2} at a distance of 4.9 m from the source. Wh
- Calculate the sound level at a distance of 4.50 m when the intensity of the sound is 1.00 x 10-2 W/m^2 at a distance of 0.50 m from the source.
- The sound intensity is 0.0080 W/m^2 at a distance of 10 m from an isotropic point source of sound. a) What is the power of the source? b) What is the sound intensity 5.0 m from the source?
- At 24 m from a sound source, the intensity level is 62 dB. Assume the temperature is 20 C. What's the level at distance of 62 m? What's the level at distance of 218 m?
- A spherical source radiates sound uniformly in all directions. At a distance of 12 m, the sound intensity level is 90 dB. a) At what distance from the source is the intensity level 60 dB? b) What po
- A spherical source radiates sound uniformly in all directions. At a distance of 12 m, the sound intensity level is 100 dB. At what distance from the source is the intensity level 40 dB?
- A spherical source radiates sound uniformly in all directions. At a distance of 10 m, the sound intensity level is 80 dB. (a) At what distance from the source is the intensity level 70 dB? m (b) Wha
- A tiny source emits sound uniformly in all directions. The intensity level at a distance of 2 m is 100 dB. How much sound power is the source emitting?
- The intensity level in a truck is 90 dB. What is the intensity of this sound? I = ____ W/m^2
- The intensity level in a truck is 98.0 dB. What is the intensity of this sound in mW/m^{2}?
- At a distance of 5.0 m from a point sound source, the sound intensity level is 110 dB. At what distance is the intensity level 95dB?
- The intensity of a spherical wave is 20 w/m^2 at a distance of 16 meters away from a constantly emitting source. What will it be from 4 meters away? a) 1000 W/m^2 b) 320 W/m^2 c) 80 W/m^2 d) 5.0 W/m^2 e) 1.25 W/m^2
- A point source of a wave emits 138 watts. At a distance of 8.19 meters, what is its intensity?
- At a distance of 7.5 m from a point sound source, the sound intensity level is 105 dB. At what distance is the intensity level 90 dB?
- At a distance of 5.0 m from a point sound source, the sound intensity level is 110 dB. At what distance is the intensity level 95 dB?
- What is the intensity in watts per meter squared of 56.9-dB sound? Answer in W/m^2
- A spherical source radiates sound uniformly in all directions. At a distance of 18 m, the sound intensity level is 90 dB. (a) At what distance is the intensity level 70 dB? (b) What is the power radia
- Suppose that sound is emitted uniformly in all directions by a public address system. The intensity at a location 26.4 m away from the sound source is 4.21 x 10^{-4} W/m^{2}. What is the intensity at
- Suppose the sound is emitted uniformly in all directions by a public address system. The intensity at a location 22 m away from the sound source is 3.0 \times 10^{-4} W/m^2 . What is the intensity at
- (a) The intensity of a sound wave is 5.29 \times 10^{-4}\ \rm{W/m^2}. Find the sound level in decibels. (b) The sound level of some music is 76.5 dB. Find the intensity in units of \rm{W/m^2}.
- A certain source of sound waves radiates uniformly in all directions. At a distance of 22 m from the source the intensity level is 78 db. What is the total acoustic power output of the source, in watt
- The intensity of the waves from a point source at a distance d from the source is I. At what distance from the sources is the intensity equal to 2I?
- There is a band that uses 10,000 W to radiate sound energy in all directions. a) What was the intensity of sound 10 meters from this speaker? b) What was the sound level in dB at a distance of 10 m?
- A point source of a wave emits 195 watts. What is the intensity at a distance of 4.56 meters?
- The intensity of a particular earthquake wave is measured to be 5.0 times 10^6 J / m^2 cdot s at a distance of 55 km from the source. (a) What was the intensity when it passed a point only 3.0 km fr
- By measurement, you determine that sound waves are spreading out equally in all directions from a point source and that the intensity is 2.3 x 10^{-2} W/m^2 at a distance of 4.0 m from the source. (a)
- At a distance of 4 m from a certain sound source, the sound level intensity is 70 dB. What is the power being emitted by the sound source? (Assume I_0=10^{-12} W/m^2.)
- A sound source emits sound with equal intensity in all directions. What is the power output if sound level = 100db at 10 m from the source? What is the intensity of the sound in watts per meter square
- A 53-dB sound wave strikes an eardrum whose area is 5.0x10^-5 m^2. The intensity of the reference level required to determine the sound level is 1.0 x10^-12 W/m^2. 1 yr=3.156x10^7s. A) How much
- The intensity of an earthquake wave is measured to be 6 \times 10^ 6 J ms at a distance of 50 km from its source. Calculate the intensity when it passed the point 4 km to the source? What is the rate
- A point source emits sound with a power of 291 W. What is the intensity level in decibels at a distance of 26 m?
- The intensity of an earthquake wave passing through the Earth is measured to be 2.5x10^6 J/sm^2 at a distance of 42 km from the source. What was its intensity when it passed a point only 1.0 km from the source? At what rate did energy pass through an area
- A 51-dB sound wave strikes an eardrum whose area is 5.0x10^-5 m^2. The intensity of the reference level required to determine the sound level is 1.0x10^-12 W/m^2. 1 yr=3.156x10^7 s. A) How much
- The source of a sound wave has a power of 1.30 muW. Assume it is a point source. (a) What is the intensity 6.80 m away? (b) What is the sound level at that distance?
- (a) What is the sound intensity of a whisper at a distance of 2.5 m, in W/m^2? Express your answer using two significant figures. (b) What is the corresponding sound intensity level in dB? Express you
- A point source emits sound with a power output of 92 watts. What is the sound level (in dB) at a distance of 12 m from the source?
- What is the intensity in watts per meter square of sound with a sound intensity level of 85.0 dB? a. 3.16 times 10^{-4} W/m^2. b. 8.50 times 10^{-4} W/m^2. c. 1.00 times 10^{-4} W/m^2. d. 3.16 times 10^{20} W/m^2.
- A person located 6 m from a sound source hears an intensity of 2 times 10^{-4} W/m^2. What intensity does a person located 2.5 m from the source hear?
- The sound from an explosion is heard at a distance of 50 m with an intensity of 0.1 W/m^2. (a) What would be its intensity at a distance of 1000 m? (b) What intensity level is the sound at 1000 m?
- The intensity of an earthquake wave passing through the Earth is measured to be 2.5 10^6 J/m^2 at a distance of 48 km from the source. What was its intensity when it passed a point only 2.0 km from th
- 15.0 meters from a sound source that radiates freely in all directions, the intensity is 0.000550 W/m2. What is the rate at which the source is emitting sound energy? answer in Watts.
- What is the intensity level of a sound whose intensity is 2.0 times 10^{-6} W/m^2?
- What is the intensity level of a sound with an intensity of 0.000127 W/m^{2}?
- A 59-dB sound wave strikes an eardrum whose area is 5.0 x 10^-5 m^2. The intensity of the reference level required to determine the sound level is 1.0 x 10^-12 W/m^2. One year = 3.156 x 10^7 seconds.
- The sound intensity level is defined by the equation: Intensity level (dB) = 10 log (I/1 times 10^{-12}) where I is the intensity of the sound. A person is listening to a sound that has an intensity of 1.0 times 10^{-6} W m^{-2} at the ear. The intensi
- What is the intensity of sound from a band with a sound level of 120 dB? (I_0 = 10^{-12} w/m^2)
- Find the noise level (in dB) of a sound having an intensity of 6.70 \times 10^{-10} W/m^2.
- 15.0 meters from a sound source that radiates freely in all directions, the intensity is 0.00480 W/m2. What is the rate at which the source is emitting sound energy?
- Light intensity (brightness) and sound intensity (loudness) also follow inverse square laws, if produced from a point source (i.e., a source which emits energy uniformly in all directions, and is small with respect to the observer's distance away).
- Two speakers are both emitting sounds, the first with an intensity level of 1 times 10^{-11} W/m^2 and the second with an intensity of 1 times 10^{-8} W/m^2. What is the decibel (db) level of the firs
- A sound wave radiates from a source in all directions. If the power of the sound source is 200 watts, then what is the intensity level of the sound wave 100 m from the source?
- The sound intensity of a conversation at a distance of 6.0 m is 1.7 times 10^-7 W / m^2. Determine the intensity at a distance of 5.0 m. Assume that the sound spreads evenly in all directions.
- 15.0 meters from a sound source that radiates freely in all directions, the intensity is 0.00230 W\,m^{-2}. What is the rate at which the source is emitting sound energy?
- What is the sound level of a sound whose intensity is 6.5 x 10^{-6} W/m^{2}? The intensity of the reference level required to determine the sound level is 1.0 x 10^{-12} W/m^{2}.
- A stereo speaker emits sound waves with a power output of 100W. (a) find the intensity 10.0m from the source. B) find the intensity level in decibels, at this distance. C) at what distance would you e
- Intensity level at a point is 100db. How much is the actual intensity of sound falling at that point? Given threshold intensity of sound 10^-12w/m^2
- What is the sound level in dB for a sound whose intensity is 5.0 * 10^(-6) watts/m^2?
- A small omni directional source of noisy sound emits uniformly with a power of 40W. Determine the distance from the source for which the sound level is 90 dB. Calculate also the intensity level at a p
- What is the sound level of a sound whose intensity is 4.5 times 10^{-6} W / m^2? The intensity of the reference level required to determine the sound level is 1.0 times 10^{-12} W / m^2.
- At a distance of 25m from an isotropic 100 MHz radio source the intensity is 120 W/m^2. \\ A) What is the rms electric field at 25m? B) Over a 2 hour period, what is the momentum given to a 4cm by 4cm surface (at the 25m distance) perpendicular to the s
- What is the intensity of a sound with a measured intensity level of 85 dB? (I_0 = 10^{-12} W/m^2)
- What is the intensity of a sound with a measured intensity level of 35 dB? (I_0 = 10^{-12} W/m^2)
- What is the intensity of a sound with a measured intensity level of 35.9 dB?
- At a busy street corner, the sound level is 75, dB . What is the intensity of sound there? (Take threshold of hearing Io = 1.0 times 10^{-12}, W/m^2 ).
- A point source emits sound wave. A detector standing 5 m away from the source records the wave intensity level 22 dB. Find the power of the source.
- What is the sound level of a sound whose intensity is 1.5 x 10^{-6} W/m^{2}? The intensity of the reference level required to determine the sound level is 1.0 x 10^{-12} W/m^{2}. Express your answer t
- A 50 dB sound waves strikes an eardrum whose area is 5.0 \times 10^{-5}m^2. The intensity of the reference level required to determine the sound level is 1.0 \times 10^{-12} W ^{-2}. 1 yr=3.156 \times
- Part A The intensity of an earthquake wave passing through the Earth is measured to be 2.5x106 J/m .s at a distance of 42 km from the source. What was its intensity when it passed a point only 1.0 km from the source? Express your answer using two signifi
- What is the intensity level of a sound with an intensity of 6.5 x 10-6 W/m^2? a. 11 dB b. 68 dB c. 34 dB d. 60 dB
- The decibel level of the sound of a subway train was measured at 91 dB. Find the intensity in watts per square meter (w/m^2).
- By measurement you determine that sound waves are spreading out equally in all directions from a point source and that the intensity is 2.4 times 10^{-2} W / m^2 at a distance of 4.0 m from the source
- What is the intensity of a sound with a measured intensity level of 36.6 dB? (I0 = 10-12 W/m2) [your answer] x 10-9 W/m�
- A source of electromagnetic waves radiates power uniformly in all directions at a single frequency. At a distance of 7.00 km from the source, a detector measures the intensity of the wave to be 35.0\ \mu W/m^2. What is the peak value of the magnetic field
- Two speakers are both emitting sounds, the first with an intensity level of 1 \times 10^{-6}\ \rm{w/m^2} and the second with an intensity of 1 \times 10^{-10.25}\ \rm{w/m^2}. What is the dB level of the first?
- At point A, 3.80m from a small source of sound that is emitting uniformly in all directions, the intensity level is 59.0dB. A. What is the intensity of the sound at A? B. How far from the source must
- What is the sound level of a sound whose intensity is 8.5 \times 10^{-6} W/m^2? The intensity of the reference level required to determine the sound level is 1.0 \times 10^{-12} W/m^2.
- What is the intensity level of a sound with an intensity of 6.5 times 10^{-6} W/ m^2?
- A siren produces a sound that has an intensity level of 120 dB at a distance of 2.0 m. Treat the siren as a point source of spherical waves. Find the intensity in decibels heard by an observer 12 m away from the source.
- The intensity of an earthquake wave passing through the Earth is measured to be 2.15 \times 10^6 W/m^2 (or 2.15 MW/m^2) at a distance of 52.0 km from the source. What was its intensity when it passed a point only 1.0 km from the source? (Answer to 3 signi
- At point A, 3.00 m from a small source of sound that is emitting uniformly in all directions, the sound level is 53.0 dB. A: What is the intensity of the sound at point A? B: How far from the source w
- A listener doubles his distance from a source that emits sound uniformly in all directions. There are no reflections. By how many decibels does the sound intensity level change?
- The intensity of an earthquake wave passing through the Earth is measured to be 2.15 \times 10^6\ W/m^2 (or 2.15\ MW/m^2) at a distance of 52.0 km from the source. (a) What was its intensity when it passed a point only 1.0 km from the source?
- What is the intensity in watts / meter squared of 70.5 db sound?
- What is the intensity in watts / meter squared of 63.3 db sound?
Explore our homework questions and answers library
Browse
by subject