Beats can be defined as the periodic fluctuations in the frequency of sound waves. That is option D
<h3>What are sound waves?</h3>
Sound waves are those waves that are produced by the vibration of an object whose energy is usually propagated through a medium.
When two sound waves of different frequencies meets, a periodic variation that occurs is called beats.
Therefore, Beats can be defined as the periodic fluctuations in the frequency of sound waves.
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P = 10^5 - ρ (average)gh
where ρ (average) = average air density between 0 and 5000 m = (1.22+0.74)/2 = 0.98
we know g & h
I get P = 52470 Pa
Answer:
ω = 22.36 Hz
f = 3.56 Hz
T = 0.28 s.
Explanation:
a) The angular frequency (ω), can be calculated using the following equation:
<u>Where:</u>
<em>k: is the spring constant = F/x</em>
<em>m: is the mass of the particle = 0.500 kg</em>
<em>F: is the force applied = 7.50 N </em>
<em>x: is the displacement = 3.00 cm = 0.03 m </em>
Therefore, the angular frequency of the motion is 22.36 Hz.
b) To find the frequency (f) we can use the next equation:

Hence, the frequency of the motion is 3.56 Hz.
c) The period (T) is equal to:

Therefore, the period of the motion is 0.28 s.
I hope it helps you!
Answer: Option A: The spots on the balloon move away as the balloon is inflated.
one of the scientific models describes the galaxies are moving apart as the universe is expanding. This expansion theory came from the observation of red-shifted spectrum from all the directions indicating that the galaxies are moving away. This can be understood from the inflated balloon. Initially spots can be marked using a colored pen on the balloon.On inflating the balloon, it would be noticed that the spots on the balloon move away. Actually the position of the spots won't change, but the distance between the spots would expand. This is a good model to explain the expanding universe. The galaxies are neither moving in any random direction nor moving forward. So, rest of the options are not good models to explain the theory.
Answer:
new angular velocity is 25.20 rpm
Explanation:
Given data
mass = 105 kg
radius = 1.40 m
spinning = 20.0 rpm
masses = 22.0 , 28.0 and 33.0 kg
to find out
new angular velocity
solution
we apply here conservation momentum
L initial = L final .........1
we know Ip = 1/2 mr² = 1/2 × 105 ×1.4² = 102.9 kg/m³
and for children initial I(i) = ( 33 + 28 + 22 )= 83 × 1.4² = 162.68 kg/m²
and I(f) children final = 33+ 22 = 55 × 1.4² = 107.80 kg/m²
so as that from equation 1
Ip + I(i) × 20 = Ip × I(f) × ω
(102.9 + 162.68 ) × 20 = (102.9 + 107.80 ) × ω
ω = 25.209302
so new angular velocity is 25.20 rpm