Gas molecules: all over moving at rapid speed
Liquid: moving slower
Solid: no movement
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
The answer is D. more quickly when heat is added to them
Answer:
<h2>10 kg.m/s</h2>
Explanation:
The momentum of an object can be found by using the formula
momentum = mass × velocity
From the question we have
momentum = 20 × 0.5
We have the final answer as
<h3>10 kg.m/s</h3>
Hope this helps you