Sounds are produced when vibrating objects create pressure waves in some medium such as air. When these variations in pressure reach the human eardrum, it causes the eardrum to vibrate in a similar manner and the ear detects sound. The intensity of sound is measured as power per unit area. The threshold for hearing (minimum sound detectable by a young, healthy ear) is defined to be I 0 = 10 − 12 W / m 2 (watts per square meter), The sound level L , or “loudness” of sound, is measured in decibels (dB) as L = 10 log ( I I 0 ) , where I is the intensity of the given sound. Use this formula for Exercises 95–96. a. Find the sound level of a jet plane taking off if its intensity is 10 15 times the intensity of I 0 . b. Find the sound level of the noise from city traffic if its intensity is 10 9 times I 0 . c. How many times more intense is the sound of a jet plane taking off than noise from city traffic?
Sounds are produced when vibrating objects create pressure waves in some medium such as air. When these variations in pressure reach the human eardrum, it causes the eardrum to vibrate in a similar manner and the ear detects sound. The intensity of sound is measured as power per unit area. The threshold for hearing (minimum sound detectable by a young, healthy ear) is defined to be I 0 = 10 − 12 W / m 2 (watts per square meter), The sound level L , or “loudness” of sound, is measured in decibels (dB) as L = 10 log ( I I 0 ) , where I is the intensity of the given sound. Use this formula for Exercises 95–96. a. Find the sound level of a jet plane taking off if its intensity is 10 15 times the intensity of I 0 . b. Find the sound level of the noise from city traffic if its intensity is 10 9 times I 0 . c. How many times more intense is the sound of a jet plane taking off than noise from city traffic?
Sounds are produced when vibrating objects create pressure waves in some medium such as air. When these variations in pressure reach the human eardrum, it causes the eardrum to vibrate in a similar manner and the ear detects sound. The intensity of sound is measured as power per unit area. The threshold for hearing (minimum sound detectable by a young, healthy ear) is defined to be
I
0
=
10
−
12
W
/
m
2
(watts per square meter), The sound level L, or “loudness” of sound, is measured in decibels (dB) as
L
=
10
log
(
I
I
0
)
, where I is the intensity of the given sound. Use this formula for Exercises 95–96.
a. Find the sound level of a jet plane taking off if its intensity is
10
15
times the intensity of
I
0
.
b. Find the sound level of the noise from city traffic if its intensity is
10
9
times
I
0
.
c. How many times more intense is the sound of a jet plane taking off than noise from city traffic?
A research study in the year 2009 found that there were 2760 coyotes
in a given region. The coyote population declined at a rate of 5.8%
each year.
How many fewer coyotes were there in 2024 than in 2015?
Explain in at least one sentence how you solved the problem. Show
your work. Round your answer to the nearest whole number.
Answer the following questions related to the following matrix
A =
3
³).
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