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Eddi Din [679]
3 years ago
10

Disturbances inside Earth’s core cause earthquakes. The starting point of the disturbance is called the epicenter. Why does the

amplitude of a seismic wave usually decrease as the wave moves away from the epicenter?
The waves lose energy in the form of heat.
The frequency of the waves continues to increase.
The wavelength of the waves continues to decrease.
The waves encounter entirely different mediums.
Physics
2 answers:
Sveta_85 [38]3 years ago
8 0

Answer:

The waves lose energy in the form of heat.

Explanation:

The waves of the earthquake loose power and energy due to an exchange in energy, friction between the mediums cause the earthquake to loose energy in form of heat, that makes the earthquake to be much more weak when the waves are traveling far than in the epicenter.

Serhud [2]3 years ago
4 0

The answer is; The waves encounter entirely different mediums

The amplitude is higher in highly elastic medium (rock) while the amplitude is lower is lessens elastic medium/rock. When the seismic waves meet a denser  medium the amplitude decreases (and the frequency increases). This effect resembles the refraction of light waves. The energy of the wave dissipates as it spreads over a large and larger area from the epicenter.


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Two carts, one of mass 2m and one of mass m, approach each other with the same speed, v. When the carts collide, they
Svetradugi [14.3K]

Answer: Graph C is the correct option

Explanation:

The question is incomplete, please remember to submit the whole question :)

However, the rest of the question with its corresponding figures is below:

Assume that positive momentum is to the right, which of the following best represents the momentum of the cart of mass m as a function of time before and after the collision?

The initial momentum p_{o} of the cart with mass m (before the collision) is:

p_{o}=-mV (1) Note the negative sign indicates the direction of cart's velocity (to the left, as seen in the first image attached)

On the other hand, the final momentum p_{f} of both carts (after the inelastic collision) is:

p_{f}=(2m+m) V_{f}=3m V_{f} (2)

So, according to this, the correct graph tha best represents the situation is C. Since before the collision the momentum is negative, then both carts slow down after the collision (V_{f}), and taking into account the linear momentum is directly proportional to the velocity p_{f} (although is in the positive direction) is less than p_{o}.

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3 years ago
Think of a scenario where an authoritarian leadership style would be beneficial. Explain. What are the reasons it would work wel
icang [17]

Answer:

Explanation:

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As explained above, it would work well because there will be no legislative bottleneck that will start a hearing at the expense of public safety neither will there be a court that will stall the process at the same expense.

The risks here is that businesses (in this case that of producing PPEs) may find it difficult to survive since the "tone" of the pricing of PPEs will now be determined by government. It may even hinder healthy business competition. It may also lead to production of substandard PPEs in order to generate enough profit (since the main aim of any business is to generate profit).

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A carnival merry-go-round rotates about a vertical axis at a constant rate. A man standing on the edge has a constant speed of 3
Advocard [28]

Answer:

r = 5.07 m

Explanation:

given,

velocity of the man , v = 3.43 m/s

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3 years ago
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