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 watts 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. What is the decibel level of a normal conversation, 3.2 × 10 − 6 watt per meter?
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 watts 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. What is the decibel level of a normal conversation, 3.2 × 10 − 6 watt per meter?
Solution Summary: The author calculates the decibel level of a normal conversation with underset_65.
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 watts 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.
What is the decibel level of a normal conversation,
3.2
×
10
−
6
watt per meter?
How long is a guy wire reaching from the top of a
15-foot pole to a point on the ground
9-feet from the pole?
Question content area bottom
Part 1
The guy wire is exactly
feet long.
(Type an exact answer, using radicals as needed.)
Part 2
The guy wire is approximatelyfeet long.
(Round to the nearest thousandth.)
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If (4,6,-11) and (-12,-16,4),
=
Compute the cross product vx w
k
Consider the following vector field v^-> (x,y):
v^->(x,y)=2yi−xj
What is the magnitude of the vector v⃗ located in point (13,9)?
[Provide your answer as an integer number (no fraction). For a decimal number, round your answer to 2 decimal places]
Chapter 4 Solutions
Algebra And Trigonometry 6th. Edition Annotated Instructor's Copy Blitzer
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