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Sonja [21]
3 years ago
11

A sound wave traveling downward with a speed of about 4,000 m/s suddenly slows to 1,500 m/s not far below the Earth’s surface. W

hat has the sound wave most likely encountered? a different kind of rock an underground lake an open cavity a pile of dinosaur bones
Physics
1 answer:
SCORPION-xisa [38]3 years ago
6 0
<h2>Answer: an underground lake</h2>

Explanation:

In general, sound (mechanical waves) travels faster in solids than in liquids, and faster in liquids than in gases. This is because <u>the speed of the mechanical waves is determined by a relationship between the elastic properties of the medium </u>in which they are propagated and the mass per unit volume of the medium (that is:<u>density</u>).

In other words: The speed of sound varies depending on the medium through which the sound waves travel.

So, if we are told the sound wave initially had a speed of 4,000 m/s and it suddenly decreases to 1,500 m/s, this means the sound waves passed from a solid medium to a liquid medium.

Hence, the correct option is: an underground lake.

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Answer:

a = 5.5 [m/s²]

Explanation:

To solve this problem we must use Newton's second law, which tells us that the force is equal to the product of mass by acceleration.

ΣF =m*a

where:

F = Force [N] (units of Newtons)

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Let's take the force of 230 [N] as positive, in this way the other force will be negative, by pointing in the opposite direction.

230 - 120 = 20*a\\110 = 20*a\\a=5.5 [m/s^{2} ]

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When I wave a charged golf tube at the front of the classroom with a frequency of two oscillations per second, I produce an elec
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To solve the exercise it is necessary to take into account the concepts of wavelength as a function of speed.

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