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solniwko [45]
2 years ago
5

Waves travel as "packets" of several waves. in these "packets," a wave travels at __________.

Physics
2 answers:
dalvyx [7]2 years ago
8 0

Answer:

a. the same speed as the wave energy

Explanation:

Wave packet is only an envelope of a more localized wave. The entire wave is a combination of the discrete wave packets.

Wave is any disturbance that travels across space. A wave does not carry the particles of the medium in which travels. It carries energy from one point to another  as it travels.

For an electromagnetic wave, the energy of the wave is due to the vibrations of the electric and magnetic fields of the wave. For sound waves, wave energy is the vibrations or disturbance of the particles of the medium in which the sound wave travels.

madam [21]2 years ago
4 0
A. the same speed as the wave energy 
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An electric ceiling fan is rotating about a fixed axis with an initial angular velocity magnitude of 0.300 rev/s . The magnitude
Salsk061 [2.6K]

1) 1.2 m/s

First of all, we need to find the angular velocity of the blade at time t = 0.200 s. This is given by

\omega_f = \omega_i + \alpha t

where

\omega_i = 0.300 rev/s is the initial angular velocity

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Substituting t = 0.200 s, we find

\omega_f = 0.300 + (0.895)(0.200)=0.479 rev/s

Let's now convert it into rad/s:

\omega_f = 2\pi \cdot 0.479 rev/s=3.01 rad/s

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2) 2.25 m/s^2

The tangential acceleration of a point rotating at a distance r from the centre of the circle is

a_t = \alpha r

where \alpha is the angular acceleration.

First of all, we need to convert the angular acceleration into rad/s^2:

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3) 3.6 m/s^2

The centripetal acceleration is given by

a=\frac{v^2}{r}

where

v is the tangential speed

r is the distance from the centre of the circle

We already calculate the tangential speed at point a):

v = 1.2 m/s

while the distance of a point at the end of the blade from the centre is

r = 0.400 m

Therefore, the centripetal acceleration is

a=\frac{1.2^2}{0.400}=3.6 m/s^2

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3 years ago
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timofeeve [1]
A flat line means the the speed is the same . Its moving at the same pace.
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