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
mixas84 [53]
3 years ago
15

5.00 m from a siren, the sound

Mathematics
1 answer:
yaroslaw [1]3 years ago
6 0

Answer:

  about 9.93 W

Step-by-step explanation:

The area of the sphere having a radius of 5 m is ...

  A = 4πr² = 4π(5 m)² = 100π m² ≈ 314.16 m²

The sound intensity at that distance is ...

  dB = 10·log(I/I0)

  105 = 10·log(I/I0) . . . . substitute given values

  10^10.5 = I/I0 . . . . divide by 10 and take the antilog

For such sound intensity measurements, the reference power level is ...

  I0 = 10^-12 W/m²

Using this in the formula, we have ...

  I = (10^10.5)·I0 = (10^10.5)·(10^-12 W/m²) = 10^-1.5 W/m²

Since the area of the sphere is 314.16 m², the total power of the siren is ...

  (314.16 m²)(0.031623 W/m²) ≈ 9.93 W

You might be interested in
2 times 8 dividedn by one
ludmilkaskok [199]

Answer:

16

Step-by-step explanation:

2*8=16

16/1=16

6 0
2 years ago
Read 2 more answers
PLEASE HELP FAST!!!
ser-zykov [4K]

The correct answer will be option C which is x > 4.

The complete question is attached with the answer below.

<h3>What is the triangle?</h3>

Triangle is a shape made of three sides in a two-dimensional plane. the sum of the three angles is 180 degrees.

A triangle is having two triangles two sides of the triangle are congruent but one angle is not equal which is 135 > 95. So the side opposite the angle 135 will be greater than the side opposite the 95 degrees.

3x  -  2  >  10

3x > 12

x   > 3

Therefore correct answer will be option C which is x > 4.

To know more about triangles follow

brainly.com/question/17335144

#SPJ1

7 0
2 years ago
Please Help!!
goldenfox [79]
Question 5 is B
Question 9 is C
5 0
3 years ago
Read 2 more answers
Solve for me pls :)
I am Lyosha [343]

Answer:

<h2>f(19) =  -  \frac{27}{7}  \\</h2>

Step-by-step explanation:

f(x) =  \frac{3}{x + 2}  -  \sqrt{x - 3}  \\

To find f(19) , substitute the value of x that's 19 into f(x). That is for every x in f (x) replace it with 19

We have

f(19) =  \frac{3}{19 + 2}  -  \sqrt{19  - 3}  \\  =  \frac{3}{21}  -  \sqrt{16}  \\  =   \frac{1}{7}  - 4 =  \frac{1 - 28}{7}

We have the final answer as

f(19) =  -  \frac{27}{7}  \\

Hope this helps you

8 0
3 years ago
Is the answer 2 to this question?
iragen [17]

Answer:

its 8

Step-by-step explanation:

use ratio solution ..

2 shampoo : 9 water

8 shampoo : 36 water

9x4 = 36

same goes too shampoo.. it needs to be multiplied with 4 as to get 36 water u multiplied 9 with 4

6 0
3 years ago
Read 2 more answers
Other questions:
  • What is the equation of the line (8,-6) 8x-3y=7
    8·1 answer
  • Which of the following is an extraneous solution of mc015-1.jpg? x = –12 x = –3 x = 3 x = 12
    6·1 answer
  • What is the third term in the expansion of the binomial (2x 5)5?
    10·1 answer
  • If A= (0,0) and B = (2,5) what is the appropriate length of AB
    15·2 answers
  • If VX = WZ = 40 cm and m∠ZVX = m∠XWZ = 22°, can ΔVZX and ΔWXZ be proven congruent by SAS? Why or why not?
    8·2 answers
  • Beatrice calculated the slope between two pairs of points. She found that the slope between ( ( -3, 3 , -2) 2 ) and (1, 0) ( 1 ,
    14·2 answers
  • The total of a number and -15 equals -6
    8·1 answer
  • How do you solve -7 times -3/5 times 15/7
    15·1 answer
  • Identify the terms in the algebraic expression below<br><br> 7h - 2 + x^2
    11·1 answer
  • There are 90 chickens on the farm if 60% of the animals on the farm are chickens ,how many animals are on the farm?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!