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ricky67
01.06.2020 •
Mathematics
NEED HELP ASAP - 35 Pts. + BRAINLIEST for the best answer!!! (Please show your work)
Question:
The smallest insects that a bat can detect are approximately the size of one wavelength of the sound the bat makes (sonar). What is the minimum frequency of sound waves required for the bat to detect an insect that is 0.60 cm long? (Assume the speed of sound is 340 m/s.)
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Ответ:
a.
f
≅
580
k
H
z
b.
T
=
1.7
⋅
10
−
6
s
Explanation:
a. The formula that relates frequency and wavelength is
f
=
v
λ
where f is frequency, v is the velocity of propagation (velocity of sound in this case), and
λ
is the wavelength.
To detect this fly,
λ
needs to be
5.7
⋅
10
−
4
m
, (or shorter). Using
331
m
s
for the speed of sound,
f
=
331
m
s
5.7
⋅
10
−
4
m
=
58.07
⋅
10
4
s
−
1
≅
580
k
H
z
b. Period,
T
, is the reciprocal of frequency.
T
=
1
f
=
1
58.07
⋅
10
4
s
−
1
=
0.0172
⋅
10
−
4
s
≅
1.7
⋅
10
−
6
s
I hope this helps,
Step-by-step explanation:
Ответ:
The fomula is y=mx+b
The number before x is the slope! Rise over run.
The + __ number is the y-intersect. use this number to place a point on the Y line.