Answer:
Hi
The findings of the National Hurricane Center on the trajectory of a tropical cyclone are subject to a certain margin of error. Such a fluctuation in the prediction of the trajectory of a cyclone is known as a cone, due to the shape of the region where the center of the hurricane could pass has that shape. To form the cone, a series of imaginary circles are placed along the predicted path of the hurricane, in the following time positions: 12, 24, 36, 48, 72, 96 and 120 hours. In this way, the size of each circle contains 67% of the margin of error of the official protocols of the last five years. Therefore, the cone is then formed by the union of the set of circles that represent the predicted trend of the passage of any hurricane.
Explanation:
At 12 Z (7 am EST) on 13 March 1993, observations of the surface analysis map indicate a _______ air mass lying to the west and northwest of the surface low (well behind the cold front).
Answer:The answer is a mass of hot air.
Explanation:That day the so-called storm of the century formed,seven tornadoes formed in Cuba with winds never seen before and a lot of rainfall.
I hope I have helped you, any question tell me. Good luck!
According to the fossil record on Earth, the earliest-known life-forms were primitive ________.
Answer:
The fossilized microorganisms found in the hydroscopic vents.
Explanation:
These life forms are known to have been first appeared the earth and thus they were in the firms of the earth at least about the 3.77 billion and old as 4.28 billion years. And these microfossils were found in the primitive rocks formed near the Australian origin. They were in the appearance of the bacteria the single-celled worms and the hydro thermal vents provided them with the adaptable conditions of their growth and development.Answer:
Bacteria
Explanation:
What is the nearest plate boundary to Washington State? What type of boundary is this?
Answer:
For about 200 million years the Pacific Northwest region has been at an active plate boundary, specifically an ocean-continent convergent plate boundary with a subduction zone. Subduction has created most of the volcanoes and mountain ranges of the Northwest.Jul 16, 2013
Explanation:
Which of the following is one of the reasons scientists strongly believe in plate tectonics?a. volcanic zonesb. trenchesc.ridgesd. earthquakese. all of above
Answer:All of the above
Explanation: before plate tectonics people were having different geologic features that are unique to there regions but has times goes by plate tectonics has unified all these descriptions, which is saying that the earth outer shell is divided into several plates that glides over the mantle .As the plate pull apart, crash together, slide past each other they fuel volcanoes , generate earthquakes and push up mountains .
Answer:
all of the above
Explanation:
Which of the following practices does very little to control soil erosion?
a. no-till planting
b. root-level irrigation
c. terracing of hillside farms
d. industrial monoculture
e. agriculture
Answer:
industrial monoculture agriculture
Explanation:
Answer:
cda
Explanation:
As the glaciers in North America melted, the runoff formed a large lake in what is now southern Manitoba, eastern North Dakota, and western Minnesota. Called Lake Agassiz, it was larger than all of the current Great Lakes combined. The present Lake Winnipeg is a remnant of this ancient lake. The City of Winnipeg is located on the ancient lakebed. What kinds of soils would you expect to find beneath the city, and what would be their likely geologic origin? What would be the typical engineering characteristics of these soils?
Answer:
1.lacustrine clays and silts
2.The likely geologic origin will be water disposition
3. strength and compressibility
Explanation:
What kinds of soils would you expect to find beneath the city
Answer->lacustrine clays and silts
what would be their likely geologic origin
-The likely geologic origin will be water disposition.
disposition can be defined as a situation whereby a material transported by water is deposited.
What would be the typical engineering characteristics of these soils?
The engineering characteristics will be found in its strength and compressibility. It has the capacity to withstand external force.
They are grainlike with dimension of about 0.06mm, Sedimentary in property and can be used for engineering activities
The soils beneath Winnipeg, once part of Lake Agassiz, consist primarily of lake sediments like clay, silt, and fine sand. They are remnants of the post-glacial lake deposits. Such soils possess unique engineering characteristics, including low permeability but high compressibility and shrink-swell potential, which require special engineering considerations.
Explanation:The soils that we would expect to find beneath the city of Winnipeg, which is located on the ancient Lake Agassiz lakebed, would likely be composed mainly of lake sediments. Over thousands of years, these sediments would have compacted and transformed into layers of clay, silt, and fine sand. Geological origin of such soil is post-glacial lake deposits.
From an engineering perspective, these types of soils can be both challenging and beneficial. Their low permeability makes them an excellent barrier against seepage (e.g., for landfills or man-made lakes), however, their high compressibility, plasticity, and shrink-swell potential can cause problems for construction. For instance, the construction of buildings or infrastructure on these soils often require special considerations to avoid settlement problems.
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Which region of the state is known primarily for its production of citrus fruits and vegetables? a. Gulf Coast regionb. Central Corridorc. Border aread. Plains region
Answer:
C. Border area
Explanation:
Because or the semitropical climate at the border areas like Texas cultivation of citrus and vegetables is easy. The valley of Rio grande and the Winter garden in South Texas are the major producers of these two crops
Answer:
Border Area
Explanation:
border area of South Texas and Rio Grande Valley
Using the Wilson cycle, very briefly (a sentence or two) explain the formation of mountain ranges such as the Appalachians and the Urals. In what ways do mountains like these provide evidence for reconstructing the ancient history of plate motions
Answer:
According to the Wilson cycle, the plate motion takes place continuously as a result of which the divergent motion of the continental plates results in the formation of the rift valley and oceans. These continuous divergent motion of continental plates results in the convergent of continental plates at some other places, which give rise to the formation of the large mountain and mountain ranges.
These Mountain ranges are the large geological landforms that are constructed due to the convergent motion of two continental tectonic plates.
For example, the Appalachians were formed due to the collision of the North American and the North African plate, about 480 million years back, which are now separated by the Atlantic ocean
The mountain belt of Urals was formed due to the collision of the eastern European and Kazakhstan continent that occurred from the late Paleozoic time to the early Triassic age.
When designing storyboards, it is a good idea to use different colors to Group of answer choices
True/False
Answer:
True, but the colors need to a have a theme so it dose not look messy
Explanation:
How has our ability to use nature, such as the development of dams, allowed us to become a major food-producing nation
Answer:
advancement of agriculture
Explanation:
f hunger is the driving force of human and it is fulfilled by food production through agriculture. ... All though you can live your life through food from other resources like Fishing, Hunting, and gathering.
Our ability to use nature such use of dams has allowed us to become a major food-producing nation because the artificial structure leads to advancement of agriculture because if facilitate artificial irrigation.
Basically, the need for food and hunger is the driving force of human and it is fulfilled by food production through agriculture. ..
Human live their life through food from other resources like Fishing, Hunting, and gathering.
In conclusion, the human ability to use nature such use of dams has allowed us to become a major food-producing nation because the artificial structure leads to advancement of agriculture because if facilitate artificial irrigation.
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Although agriculturally productive, _______ does not usually produce a food surplus because it must grow enough to feed its dense population.A. the Liao-Songhua BasinB. the Northeast China PlainC. the North China Plain638598Quiz # 6 Week 6
D. Xinjiang
Answer:
B. the Northeast China Plain
Explanation:
The large scale basin is formed by the large deposits of the yellow rover and the large alluvial plains and the river flows through the middle of the plain to the Bohai sea. The great delta is created by the river extends over much of Henan, and the Hebei, and the Shandong provinces and the southern parts of the plain have been traditionally referred to as the cradled of the Chinese civilization and this plain covers an area of about 409,500 km square.The North China Plain does not usually produce a food surplus despite its productive agriculture due to the need to support its densely populated area, with Beijing on its border and the busy port of Tianjin nearby.
Explanation:Although agriculturally productive, the North China Plain does not usually produce a food surplus because it must grow enough to feed its dense population. The North China Plain, with its average density of one thousand people per square mile, is under constant pressure to produce substantial amounts of food to support its population. The plain is bordered by Beijing and its nearest port, Tianjin, has been expanding and developing into an economic hub of industrial activity. This region relies on its agriculture to provide food and raw materials, with cotton serving as an example of a key industrial crop grown in the North China Plain. The Yellow River (Huang He River) flows through this plain, providing necessary water for the extensive agricultural operations such as wheat, sorghum, corn, and soybeans, alongside smaller plots of vegetables, fruits, and tobacco.
In which region of the United States are the majority of the country's fastest-growing metropolitan areas?
Answer:
Austin-Round
Explanation:
The total population in the Austin-Round Rock, Texas metropolitan area increased by 26.34 percent from 2010 to 2018.
Most of the fastest-growing metropolitan areas in the United States are located in the southern and western regions. Factors like economic growth, job opportunities, and affordability contribute to their expansion. This growth trend is expected to continue, contrasting with lesser-developed nations like those in Africa where urbanization is slower.
Explanation:The majority of the country's fastest-growing metropolitan areas are in the southern and western regions of the United States. This includes areas in states like Texas, Arizona, and Florida. In the last few decades, these regions have seen a significant population increase due to several factors such as economic growth, job opportunities, and affordability, attracting people to move from other parts of the country.
As these metropolitan areas have grown, they have also witnessed an expansion of suburbs and the creation of exurbs - communities that exist outside the ring of suburbs primarily populated by wealthier families. In poorer regions like much of Africa, the urban population is only about 30%, showing a distinct contrast with the urbanization trends in the US.
In the US, about 80% of the population now resides in metropolitan areas, which include the suburbs around cities, compared to only 40% in 1900. The growth trend suggests that the expansion of urban areas, including suburbs, exurbs, and metropolitan areas, will continue as these regions offer numerous resources and opportunities.
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For a given sand soil, the maximum and minimum void ratios are 0.78 and 0.43, respectively.
Given that Gs = 2.67, determine the dry unit weight of the soil when the relative density is 65% (in lb/ft^3).
Answer:
hope this helped
Explanation:
a.) Dry unit weight b.) Void ratio c.) Porosity d.) Degree of saturation Solution: a) γd= γ1+?= 17.611.108= 15.89 kN/m3b) γd= γ? ?1+15.89 = (2.67)(9.81)1+e = 0.65 c) n = e1+= 0.651.65= 0.39 d) Se = wGsS = (0.108)(2.67)0.65x 100% = 44.50% 3.2Refer to Problem 3.1. Determine the weight of water, in KN, to be added per cubic meter of soil for: a.) 80% DEGREE OF SATURATION b.) 100% DEGREE OF SATURATION Solution: a. ) S = v? ??∆S = 80 –44.50 = 35.5% n = v? ?; VT = 1m3 0.39 = v? 1Vv = 0.39 0.355 = v? 0.39; Vw = (0.355)(0.39) Vw = 0.140 m3 Ww = 0.140 x 9.81 = 1.37 Kn
Final answer:
The dry unit weight of the soil at a 65% relative density, with a specific gravity of 2.67, is approximately 106.6 lb/ft³.
Explanation:
To determine the dry unit weight of the soil at a 65% relative density, we first need to calculate the void ratio at this relative density using the formula for relative density (Dr):
Dr = (emax - e) / (emax - emin)
Where:
emax = maximum void ratio
e = current void ratio
emin = minimum void ratio
From the given 65% relative density (0.65) and the maximum (0.78) and minimum (0.43) void ratios, we can solve for e:
e = emax - Dr*(emax - emin)
Plugging in the given values:
e = 0.78 - 0.65 * (0.78 - 0.43) = 0.555
Now, we use the formula for dry unit weight (γd):
γd = (Gs * γw) / (1+e)
Where:
Gs = specific gravity of soil solids
γw = unit weight of water (62.4 lb/ft³)
e = current void ratio
Plugging in the known values:
γd = (2.67 * 62.4) / (1 + 0.555) = 106.57 lb/ft³ (approximately 106.6 lb/ft³)
You are watching a total lunar eclipse from Wellington, New Zealand. I'm in Sydney, Australia, 2200 km away from Wellington, and the Moon is above my horizon. What do I see when I look at the Moon?
In North America, which of the following climate zones fall within areas that primarily average between 40 and 59 inches of precipitation annually or higher?
Humid subtropical, moist all year, hot summer (Cfa)
Tropical, subtropical hot desert (BWh)
Humid continental, hot summer (Dfa, Dwa, Dsa)
Midlatitude cold steppe (BSk)
Subarctic, cool summer (Dfc, Dwc, Dsc)
Answer:
Humid subtropical, moist all year, hot summer (Cfa)
Explanation:
The CFA is a type of the climate that is humid subtropical and is characterized by the hot and the humid summers and has a cold to mild winters and the open system this type of the climate is either called as the as humid subtropical climates or mild temperate climates. And this occurs in the North America and the Europe.What can be done to stabilize a steep, high, dangerous rock cliff or roadcut to keep it from collapsing onto a highway or railroad track
Answer:
Inserting rock bolts.
Explanation:
A rock bolts is a long bolt that is used for bracing while carrying out rock excavation on dangerous rock cliffs, road cuts etc. It is done by spreading out the rock bolts through the drilled bolts in the rock, this will help to keep rock fractures together. In the 1890's was the first time rock bolt was used in mining operation as a from of safety in mining to avert the danger of collapse.
Stabilizing a dangerous rock cliff or roadcut can be done through the use of rockfall netting, rock bolts, controlled blasting, or setting up a retaining wall. These methods prevent falling rocks from reaching highways or railroads.
Explanation:To stabilize a steep, high, dangerous rock cliff or roadcut and prevent it from collapsing onto a highway or railroad track, numerous techniques can be employed. Rockfall netting, which is a metal or wire mesh, is one method. This netting is laid over the exposed surface to catch falling debris and prevent it from reaching the road. Another method is to use rock bolts, which are long anchoring rods drilled into the unstable rock to stabilize it. Some areas use a technique called controlled blasting to ‘prescribe’ the steepness and shape of the terrain and minimize the chancing of any unexpected rockslides. A further option is building a retaining wall at the base of the slope to hold any loose rocks or soil in place.
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According to the study discussed in the text, in which of the following countries do college-educated adults aged 25-64 have the highest level of trust in government?
Answer:
Answer is China.
Explanation:
The trust developed in the Chinese government by the college - educated adult was because the way the teachers in China were placed, and rated.
It was discovered that the teachers in China were the highest rated in the world. This is because ,the teachers are of high status and respected. This the due to the emphasis laid by the Chinese culture on the importance of education.
A drainage mat (drainage blanket) is usually placed: Select one:
(A) Vertically
(B) Horizontally
(C) Around perforated drainage pipes
Answer:
a is the answer 100% vertically
Explanation:
Typically, the drainage mat or blanket is positioned horizontally. Therefore, the correct option is B.
It is applied as a layer or barrier in landscaping or construction projects to help drain excess water. The job of a drainage mat is to create a path for water to flow horizontally and away from the area. It is installed on a flat surface like ground or roof.
The mat is made of a porous material that allows water to pass through but prevents soil or other debris from blocking the drainage system. Drainage mats work best when laid horizontally because they efficiently collect and direct water, which increases drainage and prevents water build-up in the area below.
Therefore, the correct option is B.
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Fill in the blanks with the words below:
Oslo, Canberra, Ottawa, Jakarta, Buenos Aires, Nairobi
1. ________ is the capital of Norway.
2. ________ is the capital of Australia.
3. The capital of Kenya is ________.
4. The capital of Canada is ________.
5. The capital of Argentina is ________.
6. ________ is the capital of Indonesia.
1. Oslo is the capital of Norway.
2. Canberra is the capital of Australia.
3. The capital of Kenya is Nairobi.
4. The capital of Canada is Ottawa.
5. The capital of Argentina is Buenos Aires.
6. Jakarta is the capital of Indonesia.
1. Oslo is the capital of Norway: Oslo is the largest city in Norway and serves as its capital. It's situated in the southern part of the country and is known for its cultural heritage and modern amenities.
2. Canberra is the capital of Australia: Canberra is Australia's capital city, located in the Australian Capital Territory. It was purpose-built as the capital and is home to important governmental institutions.
3. The capital of Kenya is Nairobi: Nairobi is the capital and largest city of Kenya. It's a major economic and political hub in East Africa, known for its diverse culture and urban development.
4. The capital of Canada is Ottawa: Ottawa is the capital of Canada and is situated in eastern Ontario. It's known for its historic landmarks, governmental institutions, and cultural attractions.
5. The capital of Argentina is Buenos Aires: Buenos Aires is the capital and largest city of Argentina. It's located on the eastern shore of the Río de la Plata and is a vibrant center of culture, art, and commerce.
6. Jakarta is the capital of Indonesia: Jakarta is the capital and largest city of Indonesia. It's located on the northwest coast of the island of Java and is an important economic and cultural center in the region.
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______ are solid, icelike structures composed primarily of methane that are formed in high-pressure locations such as the deep-ocean floor
Gas hydrates are solid, icelike structures composed primarily of methane that are formed in high-pressure locations such as the deep-ocean floor
Explanation:
Gas hydrates are crystalline ores that make during below molecular mass gas merges with water and turns into a solid following low temperature and average pressure circumstances. Their breakdown can discharge massive quantities of gas, which could influence Earth’s climate.
It is not steady at average sea-level pressures and temperatures, which is the initial reason that it is a provocation to examine. The hydrate reservoir may have an influential impact on the atmosphere and climate because methane is a vital greenhouse gas.
Consider the possible scenarios and determine which of them are true for positive feedbacks or negative feedbacks. Select the three that apply View Available Hint(s) Select the three that apply Increased evaporation resulting from a temperature rise can produce more clouds which can potentially lead to a positive feedback If ice cover melts due to a temperature rise the result will be decreased albedo or reflectivity which can potentially lead to a positive feedback Increased plant photosynthesis resulting from a temperature rise can remove carbon dioxide from the atmosphere which can potentially lead to a positive feedback If ice cover melts due to a temperature rise the result will be decreased albedo or reflectivity which can potentially lead to a negative feedback Increased plant photosynthesis resulting from a temperature rise can remove carbon dioxide from the atmosphere which can potentially lead to a negative feedback Increased evaporation resulting from a temperature rise can produce more clouds which can potentially lead to a negative feedback
Answer:
"Third statement" follows both positive and negative feedback.
Explanation:
Increased plant photosynthesis resulting from a temperature rise can remove carbon dioxide from the atmosphere which can potentially lead to a negative feedback. it is very common sense that remove of CO2 from atmosphere is not good for atmosphere.
Increased evaporation resulting from a temperature rise can produce more clouds which can potentially lead to a negative feedback. increased evaporation lead to more salinity of water that is not good for environment.
If ice cover melts due to a temperature rise the result will be decreased albedo or reflectivity which can potentially lead to a positive feedback. when their will be decreased albedo mean energy absorbing capacity increases, its good.
All the above 3 statement are true for positive or negative feedback.
The three scenarios denote feedback loops in environmental context. Increased evaporation and decrease in albedo are positive feedback loops, increasing the initial change. Increased plant photosynthesis is a negative feedback loop, mitigating the initial change.
Explanation:In these scenarios, we are dealing with instances of feedback loops in an environmental context, which comes under Biology. A feedback loop refers to the response to a particular process, that in turn affects that very process.
Firstly, an increase in evaporation due to a temperature rise leading to more cloud formation is likely a positive feedback loop. This is because the additional clouds may trap heat and further increase the temperature, accelerating the initial change.
Next, when ice cover melts due to a temperature rise, indeed, the result will be a decreased albedo or reflectivity. This is also a positive feedback, as less heat will be reflected back into space and more will be absorbed, raising temperatures further.
Finally, increased plant photosynthesis due to temperature rise removes carbon dioxide from the atmosphere, which would actually present a negative feedback loop. As photosynthesis removes CO2—an important greenhouse gas— from the atmosphere, it cools the atmosphere and works against the initial change, hence a negative feedback.
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Your friend tells you that our orbit is so special that it is at just the right distance from the sun for us to be at the right temperature for life to flourish. He says that if we were even ten miles closer to the sun, we would burn up. If we were ten miles farther from the sun, we would freeze. Is your friend correct?
Answer: YES
Explanation: the Earth is at the right distance, it is believed that the distance between the Earth and the sun is about 150million kilometers. If at 150million kilometers,we are having the level of Temperature that we have where certain regions are going up to 40degrees Celsiusand other places are as low as -10degrees Celsius. Going closer with up to 10miles means the Temperature will further go up to about 70-100degrees depending on where you are at a given time, and moving far 10miles away means the ten will reduce further will cause people to freeze. The Earth is a sphere and the distance from the sun is not regular.
The projected increase of the Hispanic population in the United States over the next 25 years will most likely be fueled by ___.
Answer:
Immigration and education
Explanation:
In 2016, the Hispanic population in the United States of America reached nearly 58 million people. Experts have reported that the levels of immigration have increased and may reach higher levels in the next century, a situation fueled my immigration and education.
However, researchers also state that this could potentially change due to immigration laws (U.S.A. and Mexico). They also report that fertility rates have declined among Hispanic populations, which could also lead to a slower demographic growth.
Moreover, it has been shown the Hispanic populations, by being younger, are more likely to migrate to the United States (and other countries) to attend university and reach higher levels of education. Therefore, education is also fueling the increase of Hispanic people in other countries.
If you started at the equator on the center of a continent (such as Africa) and headed poleward, what would be the most likely sequence of Koppen climates that you would encounter in their order of occurrence?
Answer:
The equator is located at the centre of earth and as per the koppen climates you would encounter in general would go from the A,B,C,D, and E. Additionally, the actual location of where you start might determine what specific subsets of each climate.
Explanation:
As koppen devised hos climatic classification as according to the vegetation community that is linked with the climatic zones such as the A Tropical Which shoes the wet and the dry regions and such as the rainforest and the grasslands and B Dry, desert climate with the seasonal flowering plants. Then there is C mesothermal that is the Mediterranean climate and mico-thermal found at the subarctic and the E as the polar climate which has ice caps.Koppen climate is a classification method used for dividing and understanding the climates based on five zones based on temperature and precipitation of the area.
You would encounter the Koppen climate change from A, B, C, D and E. Also the exact location will determine the subsets of the climatic zones.
What is the Koppen Classification?The various climates of the Koppen classification are A- tropical, B - dry, C - temperate, D - continental and E - polar. The centre of the earth is the equator and will have experienced all the climatic zones when moving from the middle towards the polar region.Therefore, when moved from the equator towards the poles all the climatic zones in their order will be encountered.
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When new oceanic lithosphere is generated at an oceanic ridge, what happens to the two plates on either side of the ridge?
Answer:
The two plates becomes larger
Explanation:
The mid-oceanic ridges are the landforms that are formed at the divergent plate boundaries, and these represent the spreading zone. The magma below the earth's crust becomes so hot and pushes upward with great force, as a result of which the magma comes out at the seafloor, resulting in the addition of new materials to the oceanic crust.
This formation of new crust results in the expansion of the plates. The size of the plates becomes larger on both sides of the ridge. The rocks that are formed along the mid-oceanic ridges are the geologically the youngest rocks.
During what geologic period did the bony ray-finned fishes diversify tremendously and begin to dominate the aquatic habitats of Earth and when the lobe-finned fishes first appeared.
Answer:
From the Silurain to Devonian period
Explanation:
Diversification of fish began during the Silurian period continued during the Devonian Period. The lobe-finned fishes first appeared during the Silurian.
Name some Oceans and Gulfs?
Answer:
Oceans:
Atlantic ocean
Pacific Ocean
Arctic Ocean
Indian Ocean
Gulfs:
Gulf of mexico
Gulf of california
Gulf of Aden
Explanation:
Did you predict that in each interaction there would be an evolutionary pressure to reduce negative effects or increase positive effects? Those predictions make sense, but why, after 3.5 billion years of evolution, do we still have interactions with negative effects?
Answer:
Yes, in each interaction, there would be an evolutionary pressure with negative and positive effects
Explanation:
Parasitism and mutualism are two fundamental relationships in evolutionary studies with negative and positive effects respectively. Even after 3.5 billion years of evolution, we still have some form of parasitism among animal species that result in negative effects. This may be due to the necessity of evolutionary interactions and the balance maintained by ecological nature for both fauna and flora. Individual species compete for the limited resources available for ultimate survival. In mutualistic units with two species, there must be a parasitic character.
P and S waves from an earthquake travel at different speeds, and this difference helps locate the earthquake "epicenter" (where the disturbance took place). a. Assuming typical speeds of 8.5 km/s and 5.5 km/s for P and S waves, respectively, how far away did an earthquake occur if a particular seismic station detects the arrival of these two types of waves 1.5 min apart? b. Is one seismic station sufficient to determine the position of the epicenter? Explain.
Answer:
(a) Since both P and S wave travels the same distance, so it can be written as: Δx = V₁t₁ = V₂t₂,
Where, V₁- Speed of S wave
V₂- Speed of P wave
t₁- time taken by S wave
t₂- time taken by P wave
Therefore, t₁ > t₂ (since, time taken by S wave is longer than P wave)
⇒ t₁ = t₂ + 1.5 min
⇒ t₁ = t₂ + 90 sec
⇒ V₁ (t₂ + 90 sec) = V₂ (t₂)
⇒ V₁t₂ + V₁ (90 sec) = V₂ (t₂)
⇒ V₂t₂ - V₁t₂ = V₁ (90 sec)
⇒ t₂ (V₂- V₁) = V₁ (90 sec)
⇒ t₂ = {V₁ (90 sec)} ÷ {(V₂- V₁)}
⇒ t₂ = {5.5 × (90 sec)} ÷ {(8.5 - 5.5)}
Therefore, t₂ = 165 sec
Since, Δx = V₁t₁ = V₂t₂
Now, Δx = V₂t₂ = (8.5 × 165 sec)
⇒ Δx = 1402 km
Therefore, Δx is approximately 1400 km (this means that the earthquake occurred at a distance of about 1400 km from the recorded seismic station)
(b) No, Only seismic station is not sufficient to detect the epicenter of an earthquake. Seismologists and geologists usually use the triangulation method in order to determine the exact location of the epicenter. This is possible by the use of three seismographs that are placed at three different locations nearby to that earthquake occurring position.
If an observer on Earth is viewing a lunar eclipse, what would an observer on the Moon looking back at Earth see?
During a lunar eclipse, an observer on the Moon would see a solar eclipse with the Earth covering the Sun but surrounded by a bright, red halo. This occurs due to the Earth's atmosphere scattering sunlight, a phenomenon known as Rayleigh scattering.
Explanation:An observer on the Moon during a lunar eclipse would see a phenomenon often referred to as a 'ring of fire'. This occurs because, from the perspective of the Moon, the Earth would be directly between the Moon and the Sun. As the Earth blocks the direct sunlight, the Earth's atmosphere bends additional sunlight towards the moon, rendering the Earth as a dark disk with a glowing red halo. This is caused by the scattering of sunlight by Earth’s atmosphere, a phenomenon known as Rayleigh scattering, which is also the reason why our skies appear blue and sunsets appear red. So during a lunar eclipse, the observer on the Moon would see a solar eclipse with the Earth surrounded by a bright red halo of refracted sunlight.
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