1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
nlexa [21]
3 years ago
7

The sound from a loud speaker has an intensity level of 80 db at a distance of 2.0m. Consider the speaker to be a point source,

how far from the speaker will the sound have an intensity level of 40 db.
Physics
1 answer:
Tamiku [17]3 years ago
5 0

Answer:

2.83m

Explanation:

The information that we have is

Intensity at 2.0 m: I=80dB and r_{1}=2m

we need an intensity level of: I_{2}=40dB

thus, we are looking for the distance r_{2}.

which we can find with the law for intensity and distance:

(\frac{r_{2}}{r_{1}} )^2=\frac{I_{1}}{I_{2}}

we solve for r_{2}:

\frac{r_{2}}{r_{1}}=\sqrt{\frac{I_{1}}{I_{2}} }\\\\r_{2}=r_{1}\sqrt{\frac{I_{1}}{I_{2}} }

and we substitute the known values:

r_{2}=(2m)\sqrt{\frac{80dB}{40dB} }\\\\r_{2}=(2m)\sqrt{2}\\ r_{2}=2.83m

at a distance of 2.83m the intensity level is 40dB

You might be interested in
13. What is the acceleration of a 1,000-kilogram truck with a net force of 7,000 newtons?
lara31 [8.8K]

Answer:

<h2>7 m/s²</h2>

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

a =  \frac{f}{m}  \\

f is the force

m is the mass

From the question we have

a  = \frac{7000}{1000}  = 7 \\

We have the final answer as

<h3>7 m/s²</h3>

Hope this helps you

3 0
3 years ago
A horizontal force of 50 N is required to push a wagon across a sidewalk at a constant speed.
Lerok [7]
The answer is In fact A because it’s unbalanced
5 0
3 years ago
Biological factor related to antisocial personality disorder is
dusya [7]
Schizotypal personality disorder and borderline personality disorder 
4 0
3 years ago
Read 2 more answers
When magnesium fluoride reacts with iodine, the products are fluorine and magnesium iodide. What would the equation be?
likoan [24]

Answer:

Explanation:

Every chemical reaction can be represented by simple chemical equations that shows how compounds are combining to give some products.

Such reactions are usually made up of:

     Reactants on the left hand side

     Products on the right hand side

            Reactants  →  Products

In this given problem;

            Reactants are :   Magnesium fluoride  = MgF₂

                                             Iodine in form of Iodide   = I₂

           Product : Magnesium iodide  = MgI₂

             

               MgF₂   +     I₂    →       MgI₂   +   F₂

   

                             

   

7 0
3 years ago
Transforma la siguiente unidad al sistema internacional:<br> 37 ft3
tigry1 [53]
F up HC Chi UC Chi UC CI UC CJ
3 0
3 years ago
Other questions:
  • Check
    13·2 answers
  • A particle is being accelerated through space by a 10 N force. Suddenly the particle encounters a second of 10 N force in the op
    6·1 answer
  • The near point (smallest distance at which an object can be seen clearly) and the far point (the largest distance at which an ob
    6·1 answer
  • What is the definition of velocity? (AKS 1/DOK1)
    10·2 answers
  • In an internal combustion engine, the gas vapor/air mixture enters the cylinder during the _____ stroke. intake compression powe
    6·1 answer
  • A vacuum gage attached to a power plant condenser gives a reading of 27.86 in. of mercury. The surrounding atmospheric pressure
    15·1 answer
  • Consult Multiple-Concept Example 11 for background material relating to this problem. A small rubber wheel on the shaft of a bic
    7·1 answer
  • 20. How much charge will flow through a 2002 galvanometer
    7·1 answer
  • A 15kg object strikes the ground with 2000J of kinetic energy after freely falling from rest. How far above the ground was the o
    8·1 answer
  • I need helppppppppp!!!!!!
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!