Answer:
A) I = 1.29 10⁻¹¹ W / m²
, B) B = 1.34 10⁵ Pa
Explanation:
The intensity of a wave is given by
I = P / A
Where the power of sound is
P = ½ ρ A v w² s₀²
Angular velocity and frequency are related.
w = 2π f
We replace
I = ½ ρ v 4π² f² s₀²
I = 2 π² ρ f² s₀²
Let's calculate
I = 2π² 1.24 329 (4.00 10⁻⁸)²
I = 1.29 10⁻¹¹ W / m²
Part B
The speed of sound is related to the properties of the medium where it propagates
v = √ B / ρ
B = ρ v²
Let's calculate
B = 1.24 329²
B = 1.34 10⁵ Pa
Answer:
erosion
muddy water and soil being carried away by a fast-moving river is erosion
Answer:
1: Check if power is out
2: check on electricity bill if payed on time
3: make sure you're light bulb didn't go out
4: replace light bulb if needed
Explanation:
Answer:
restoring force is 2 N
Explanation:
given data
angle pulled = 5°
force = 1 N
pulled = 10°
to find out
restoring force
solution
we know here force
force = m×g×sinθ ..........1
so here θ is very small so sinθ = θ
1 = mg(5)
mg = 1 /5 ..................2
and
now for 10 degree
we know here θ is small so sinθ = θ
so from equation 1
force = m×g×sinθ
put equation 2 here
force = 1/5 × 10
force = 2 N
so restoring force is 2 N