The loudness level of a sound, D, in decibels, is given by the formula D = 10 log ( 10 12 I ) , where 1 is the intensity of the sound, in walls per meter 2 . Decibel levels range from 0, a barely audible sound, to 160, a sound resulting in a ruptured eardrum. (Any exposure to sounds of 130 decibels or higher puts a person at immediate risk for hearing damage.) Use the formula to solve Exercises 117-118. The sound of a blue whale can be heard 500 miles away, reaching an intensity of 6.3 × 10 6 watts per meter 2 . Determine the decibel level of this sound. At close range, can the sound of a blue whale rupture the human eardrum?
The loudness level of a sound, D, in decibels, is given by the formula D = 10 log ( 10 12 I ) , where 1 is the intensity of the sound, in walls per meter 2 . Decibel levels range from 0, a barely audible sound, to 160, a sound resulting in a ruptured eardrum. (Any exposure to sounds of 130 decibels or higher puts a person at immediate risk for hearing damage.) Use the formula to solve Exercises 117-118. The sound of a blue whale can be heard 500 miles away, reaching an intensity of 6.3 × 10 6 watts per meter 2 . Determine the decibel level of this sound. At close range, can the sound of a blue whale rupture the human eardrum?
Solution Summary: The author calculates the decibel level of the sound of blue whale and whether it can rupture the human eardrum.
The loudness level of a sound, D, in decibels, is given by the formula
D
=
10
log
(
10
12
I
)
,
where 1 is the intensity of the sound, in walls per meter2. Decibel levels range from 0, a barely audible sound, to 160, a sound resulting in a ruptured eardrum. (Any exposure to sounds of 130 decibels or higher puts a person at immediate risk for hearing damage.) Use the formula to solve Exercises 117-118.
The sound of a blue whale can be heard 500 miles away, reaching an intensity of
6.3
×
10
6
watts per meter2. Determine the decibel level of this sound. At close range, can the sound of a blue whale rupture the human eardrum?
Co Given
show that
Solution
Take home
Су-15
1994
+19
09/2
4
=a
log
суто
-
1092
ж
= a-1
2+1+8
AI | SHOT ON S4
INFINIX CAMERA
a
Question 7. If det d e f
ghi
V3
= 2. Find det
-1
2
Question 8. Let A = 1
4
5
0
3
2.
1 Find adj (A)
2 Find det (A)
3
Find A-1
2g 2h 2i
-e-f
-d
273
2a 2b 2c
Question 1. Solve the system
-
x1 x2 + 3x3 + 2x4
-x1 + x22x3 + x4
2x12x2+7x3+7x4
Question 2. Consider the system
= 1
=-2
= 1
3x1 - x2 + ax3
= 1
x1 + 3x2 + 2x3
x12x2+2x3
= -b
= 4
1 For what values of a, b will the system be inconsistent?
2 For what values of a, b will the system have only one solution?
For what values of a, b will the saystem have infinitely many solutions?
Chapter 4 Solutions
Algebra And Trigonometry 6th. Edition Annotated Instructor's Copy Blitzer
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