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
Sedbober [7]
3 years ago
9

What is the sound level for a noise that has an intensity of 9.9 × 10-5 watts/m2?

Mathematics
1 answer:
horsena [70]3 years ago
8 0

Given: Sound Intensity ( I ) = 9.9 \times  10^{-5}\frac{watts}{m^2}

We know,  the approximate threshold of human hearing is at 1kHz. In watts/m^2 it's value is =\frac{9.9 \times  10^{-5}}{10^{-12}}⁻¹² W/m².

So, we can say,  Reference sound intensity(I_0) = 10⁻¹² W/m².

We have formula for "sound intensity level LI in dB" when entering sound intensity.

LI = 10×log (I / Io)  in dB

Plugging values of I and Io in formula.

LI = 10 × log (\frac{9.9 \times  10^{-5}}{10^{-12}})

LI = 10 × log (99000000)

= 10 × 7.99564

LI = 79.96 dB.

Therefore,  79.96 dB is the sound level for a noise that has an intensity of 9.9 × 10-5 watts/m2.

You might be interested in
A 25 foot ladder rests against a buliding . The base lf the ladder is 15 feet away from the base of the building. At what height
professor190 [17]
X^2+15^2=25^2
X^2+225=625
Isolate X
X^2=400
Take the square root on both sides
X=positive and negative 20 but in this case the negative is thrown out because you can't have a negative side
Answer: 20
3 0
3 years ago
Margie pays $9.43, which includes 15%
andrew-mc [135]

Answer:

15% $1.41 $10.84

10.84

8 0
3 years ago
Which relation is a function?( click all that apply)
weeeeeb [17]
A, B, D are functions.
(First, second, and fourth response)
You can see which is function since for everyone input only has one value. You can also use the vertical line test.
7 0
3 years ago
Explian GOLDEN RATION singinficane
Yuliya22 [10]

\large\bold\blue{ANSWER:-}

<em>Golden ratio, also known as the golden section, golden mean, or divine proportion, in mathematics, the irrational number (1 + Square root of√5)/2, often denoted by the Greek letter ϕ or τ, which is approximately equal to 1.618.</em>

5 0
2 years ago
WILL GIVE BRAINLIST TO CORRECT ANSWER
faust18 [17]

Answer:

C) (9, 4)

Step-by-step explanation:

4 < 5☑

4 < 3[9] → 4 < 27☑

Therefore, this solution is genuine.

I am joyous to assist you anytime.

4 0
3 years ago
Other questions:
  • HELP PLEASE , ASAP ; 100 POINTS
    11·2 answers
  • Can somebody help me !
    13·1 answer
  • The graph of f(x) = log x + 3 is the graph of<br> g(x) = log x translated 3 units |
    11·2 answers
  • In a wood there are 420 silver birch trees, 160 oak trees and 300 wild berry trees. what percentage of the trees are oak trees?
    14·2 answers
  • Two sevenths of the crowd cheered Wiley. The rest of the crowd stood quietly. What fraction of the crowd stood quietly.
    13·2 answers
  • In how many ways can 3 letters be mailed in 6 mailboxes if each letter must be mailed in a different box? If the letters are not
    6·1 answer
  • 2(10 – 24x) + y2<br> What is X equals<br> What is Y equals <br> What is the answer
    14·1 answer
  • Use substitution: y= 5 and y = 7x -2*
    7·1 answer
  • A truck carries a load of 50 boxes of 2types.if type one boxes weight 20kg each and type two boxes weigh 25 kg each ,and the tot
    12·1 answer
  • I'll put this as random but you can answer it... <br> ill give yall 10 points if yall do it!
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!