A wave having velocity 320m/s having amplitude 2 units how to find out frequency and wavelength
Answers
Answered by
1
I
=
3.03
×
10
−
4
W
m
2
.
Intensity is defined as power over an area. It's given by
I
=
P
A
where
I
→
intensity;
W
m
2
P
→
power;
W
A
→
area;
m
2
The intensity of a sound wave is given by the following eq'n:
I
=
(
Δ
p
)
2
2
ρ
v
w
where
I
→
intensity;
W
m
2
Δ
p
→
pressure variation/pressure amplitude
P
a
or
N
m
2
ρ
→
density of material;
k
g
m
3
v
w
→
speed of sound in medium;
m
s
Given this equation, along with constants, you can substitute your values and solve.
The constant for the speed of sound in air at 20*C is 343
m
s
.
The density of air is 1.2041
k
g
m
3
.
I
=
0.5
2
2
(
1.2041
)
(
343
)
=
3.026588214271792
⋅
10
−
4
3.03
⋅
10
−
4
W
m
2
.
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