Earthquakes have two kinds of waves, P waves and S waves. These waves may someday help scientist develop an early warning system for earthquakes. The P wave (also known as the primary wave) is the first wave, and the S wave (secondary wave) travels after it. Scientists can find the location of an earthquakes epicenter by subtracting the time that elapses between the P and S waves. A convenient way to find the epicenter is to use a graph like the one shown here.
Suppose that scientists record a P wave on a seismic device at 10 minutes. An s wave reaches the device at 15 minutes (5 minutes later). What is the distance between the recording device and the epicenter of the earthquake? Use the graph to determine your answer.
Answers
Answer:
42
Explanation:
Multiply the difference by 8.4 to estimate the distance. ( kilometers )
P wave = 10
S wave = 15
Difference = 5
8.4 * 5 = 42
The initial wave (P wave) is less severe and moves faster, whereas the more damaging S wave moves slowly.
What is seismic waves?When an earthquake happens, it sends forth energy waves known as seismic waves. It's similar to the ripples that occur when a stone is thrown into water.
Here, There are two types of waves: P waves and S waves.
P waves travel faster and are formed first; they go in the exact opposite direction from where the earthquake occurs.
S waves, or secondary waves, on the other hand, are slower and travel in a perpendicular direction.
When these waves are generated in particular facilities, scientists can detect them.
The difference between time = 15 – 10 = 5
From the graph:
=8.4×5
= 42
Thus, the initial wave (P wave) is less severe and moves faster, whereas the more damaging S wave moves slowly.
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A conservative force is a force with the property that the total work done in moving a particle between two points is independent of the path taken Equivalently if a particle travels in a closed loop the total work done by a conservative force is zero
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A centripetal force of 1N is used to keep a 0.1kg yoyo moving in
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Answer:
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Explanation:
Two ice skaters approach each other at right angles. Skater A has a mass of 27.4 kg and travels in the x direction at 1.23 m/s. Skater B has a mass of 49.4 kg and is moving in the y direction at 0.759 m/s. They collide and cling together. Find the final speed of the couple. Answer in units of m/s.
Answers
Answer:
The final speed will be "0.65 m/s".
Explanation:
The given values are:
[tex]m_a[/tex] = 27.4 kg
[tex]m_b[/tex] = 49.4 kg
[tex]v_a[/tex] = 1.23 m/s
[tex]v_b[/tex] = 0.759 m/s
By using the law of conservation of momentum, we get
⇒ [tex]P=\sqrt{P_1^2+P_2^2}[/tex]
⇒ [tex]= \sqrt{(m_av_a)^2+(m_bv_b)^2}[/tex]
On substituting the values, we get
⇒ [tex]=\sqrt{(27.4\times 1.23)^2+(49.4\times 0.759)^2}[/tex]
⇒ [tex]=\sqrt{1135.82+1405.84}[/tex]
⇒ [tex]=50.41 \ kg-m/s[/tex]
As we know,
⇒ [tex]P=(m_1+m_2)v[/tex]
Then,
⇒ [tex]v=\frac{P}{m_1+m_2}[/tex]
On substituting the values, we get
⇒ [tex]=\frac{50.41}{27.4+49.4}[/tex]
⇒ [tex]=\frac{50.41}{76.8}[/tex]
⇒ [tex]=0.65 \ m/s[/tex]
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Answer is
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What is Converging lens?The light beams in this instance diverge after passing through the lens. A virtual image is created when diverging refracted rays collide.
All light rays can be followed backwards until they intersect to determine the image's location. The extended refracted beams' point of intersection, which appears to all observers to be the refracted rays' point of divergence, is the image point.
1/(-15) = 1/v + 1/(-45)
→ -1/15 = 1/v - 1/45
→ -1/15 + 1/45 = 1/v
→ (-3 + 1)/45 = 1/v
→ -2/45 = 1/v
→ -45/2 = v
→ 53.3 cm = v
Therefore, 53.3cm will be the focal length of converging lens.
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Answer: a= 2 m/s²
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Answer:
formed by the process of glaciation.
Explanation:
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Answer:
Earth's surface is broken into large pieces that are slowly shifting. ... This movement creates many of Earth's landforms, such as mountains, rift valleys, and volcanoes. According to the theory of plate tectonics, 250 million years ago all of Earth's landmasses were clustered into one supercontinent, known as Pangea.
or
Presently the plates are moving towards each other and will eventually merge into one landmass once again. Presently Africa I moving towards Europe and Asia and will merge with that landmass, closing the Mediterranean Sea. When plates move towards each other extensive fold mountain ranges will form; a modern day example is the Himalayan mountain range. This type of movement will impact ocean currents as we know it and bring about a dramatic change in the climate. Disruption of currents and the closure of some water ways and oceans will lead to the extinction of some species. Leaving only those who are able to adapt to the new climatic conditions.
Explanation:
you can choose either one
Answer:
Based on what I have learned this year and past knowledge, I think they will move in a combination of two. The tectonic plates move around the planet but move very slowly, only a few centimeters per year, which plays a big part in the picture. If you look at California, It's splitting! But who is to say that the continents will not cluster to another land as it spreads out. There's also not enough space on earth for every piece of land. But when they do end up clustered together, mountains will be formed, and if they spread out, faults will be created. So I think in 250 million years we will have another supercontinent like Pangea. I also believe that there will be many new geographical changes, including volcanoes, more mountains, and deeper oceans. This will also cause new Invasive species and the destruction of man-made buildings.
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Answer:
It’s behavioral which is learned via classical conditioning it’s when the neutral or the conditioned stimulus becomes something that causes fear to all organisms
A person acquire a fear of or aversion to something even though it has no negative effect on him or her due to the classical conditioning.
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Answers
Answer:
b. the cylinder
Explanation:
From the information given:
We understood that the mass of the sphere, cylinder, and rod length is the same with the same angular speed.
Taking their moments:
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Answers
Answer:
563.86 N
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We know the buoyant force F = weight of air displaced by the balloon.
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substituting the values of the variables into the equation, we have
F = 1.29 kg/m³ × 9.8 m/s² × 4π × (2.20 m)³/3
= 1691.58 N/3
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What is Reflection ?Reflection is the change of direction of the wave at the interface which separates two media. it get incident on the other media and get return to the same media is called as reflection. Common examples include the reflection of light, sound and water waves.
we can see that in the dark room when we incident light on the mirror, the direction of the light changes at the point of the incidence. in the scientific language we can say that light has reflected from the surface of the mirror. in this case angle of incidence is always equal to angle of reflection.
Any mirror bounce back the incident light. therefore it is used to see our face. it reflects almost all the light to same medium from which light has been incident.
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Answer:
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Answer:
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