Answer:
a.
f
β
580
k
H
z
b.
T
=
1.7
β
10
β
6
s
Explanation:
a. The formula that relates frequency and wavelength is
f
=
v
Ξ»
where f is frequency, v is the velocity of propagation (velocity of sound in this case), and
Ξ»
is the wavelength.
To detect this fly,
Ξ»
needs to be
5.7
β
10
β
4
m
, (or shorter). Using
331
m
s
for the speed of sound,
f
=
331
m
s
5.7
β
10
β
4
m
=
58.07
β
10
4
s
β
1
β
580
k
H
z
b. Period,
T
, is the reciprocal of frequency.
T
=
1
f
=
1
58.07
β
10
4
s
β
1
=
0.0172
β
10
β
4
s
β
1.7
β
10
β
6
s
I hope this helps,
Step-by-step explanation:
