Here are a few statements that are commonly believed to be true about Sub-Saharan African cities:
1. Sub-Saharan African cities have experienced rapid urbanization in recent years, with many people moving from rural areas to urban centers in search of better economic opportunities.
2. Many of these cities are characterized by informal settlements, inadequate infrastructure, and limited access to basic services like clean water, sanitation, and healthcare.
3. Crime and violence are major concerns in many Sub-Saharan African cities, with high rates of theft, robbery, and homicide.
4. Despite these challenges, many cities in the region are also centers of cultural and artistic expression, with vibrant music, art, and fashion scenes.
"Sub-Saharan African cities are all the same" is not true. While there are certainly some commonalities among cities in the region, there is also a great deal of diversity in terms of culture, geography, and development. Some cities, like Lagos and Nairobi, are major economic hubs with bustling business districts and thriving tech industries.
Others, like Dakar and Accra, are known for their vibrant arts and culture scenes. Still others, like Kigali and Addis Ababa, are actively working to improve infrastructure and urban planning in order to make their cities more livable and sustainable. So while there are certainly challenges facing many Sub-Saharan African cities, it's important to recognize the diversity and complexity of the region as well.
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Which of these were observed from Earth, prior to spacecraft missions to Mars?
A: dust storms capable of covering the entire planet
B: eruptions of Mount Olympus
C: seasonal changes in the polar caps
D: Both A and C are correct.
E: All of the above are correct
Dust storms capable of covering the entire planet and seasonal changes in the polar caps were observed from Earth prior to spacecraft missions to Mars that is option A.
Mount Olympus is a Martian volcano and was not observed from Earth. Dust storms on Mars can be massive and last for weeks or months, covering the entire planet and affecting the planet's climate. Seasonal changes in the polar caps are caused by the seasonal cycle of the planet and can be observed from Earth using telescopes. These observations provided important insights into the Martian environment and informed future spacecraft missions to the planet.
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brown dwarfs, white dwarfs, and neutron stars are all kept from collapsing by degeneracy pressure. True or False?
True. Brown dwarfs, white dwarfs, and neutron stars are all supported against gravitational collapse by degeneracy pressure.
Degeneracy pressure is a quantum mechanical effect that arises due to the Pauli exclusion principle, which states that no two fermions can occupy the same quantum state simultaneously. In the case of brown dwarfs, white dwarfs, and neutron stars, degeneracy pressure counteracts the force of gravity, preventing further collapse.
In brown dwarfs, degeneracy pressure arises from electron degeneracy, where electrons are packed so closely together that they obey the Pauli exclusion principle, exerting a pressure that supports the star against collapse.
In white dwarfs, degeneracy pressure results from electron degeneracy as well. The core of a white dwarf is composed of degenerate electrons, while the outer layers are made up of non-degenerate, ionized matter.
In neutron stars, the intense gravitational forces crush atomic nuclei, causing electrons to merge with protons, resulting in a dense soup of neutrons. Neutron degeneracy pressure prevents further gravitational collapse.
Thus, all three types of objects—brown dwarfs, white dwarfs, and neutron stars—rely on degeneracy pressure to counterbalance gravity and prevent collapse .
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The international dateline is measured approximately from:
A. 0° latitude B. 0° longitude C. 90° latitude D. 180° longitude
E. 90° longitude
The international dateline is measured approximately from 180° longitude.
The international date line, which was established in 1884, basically parallels a 180 degree longitudinal north-south line on Earth and passes through the center of the Pacific Ocean. It is approximately halfway around the world from the prime meridian, that is the 0 degrees longitude line at Greenwich, England.
The international date line is a "line of delineation" that divides two following calendar dates. As you pass the date line, you sort of go through time! It will be the day after if you cross to the west; if you go back, it will be the day before. Unlike the term, there is no formal worldwide authority over the international date line, and countries are free to choose which dates they observe.
Option D is the correct answer.
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the reservoir of _______ in the soil is the largest reservoir of nutrients in the ecosystem
The reservoir of nutrients in the soil is the largest reservoir of nutrients in the ecosystem.
What is the the largest reservoir of nutrients in the ecosystem?Nutrients such as nitrogen, phosphorus, and potassium are essential for plant growth and are cycled through the ecosystem as plants are consumed by animals and decompose back into the soil. The soil acts as a reservoir for these nutrients, holding them until they are needed by plants.
This is why maintaining healthy soil is so important for sustaining healthy ecosystems and agriculture. Soil fertility can be maintained by practices such as crop rotation, composting, and minimizing soil erosion.
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which country of the world has the greater percent of land suitable for agriculture?
There are several countries in the world that have a large percentage of land suitable for agriculture, but the country with the greatest percentage is Ukraine. Approximately 70% of the country's land area is suitable for agriculture, with fertile soils and a favorable climate for growing crops such as wheat, corn, and sunflowers.
Other countries with high percentages of agricultural land include India, China, and the United States. However, it's worth noting that just because a country has a high percentage of land suitable for agriculture doesn't necessarily mean that it is being utilized efficiently or sustainably. Many factors, such as government policies, infrastructure, and access to technology, can affect a country's agricultural productivity and food security.
The country with the greatest percent of land suitable for agriculture is Bangladesh. With approximately 59% of its land area dedicated to agricultural activities, it has the highest percentage globally. Bangladesh's fertile land, favorable climate, and abundant water resources make it highly suitable for agricultural production, mainly focusing on rice, wheat, and vegetables. As agriculture is vital for the country's economy, it contributes significantly to food security, employment, and rural development.
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a nova is a sudden outburst of light coming from an old main-sequence star.
False. A nova is not a sudden outburst of light coming from an old main-sequence star.
A nova is actually a sudden, temporary increase in the brightness of a star, which occurs in a binary star system. It happens when a white dwarf star, which is the remnant core of a once larger star, accretes matter from its companion star. As the accreted material accumulates on the surface of the white dwarf, it becomes hot and dense, triggering a thermonuclear explosion that releases a tremendous amount of energy.
This explosion causes a rapid increase in the star's brightness, making it appear much brighter for a certain period of time before gradually fading back to its original state. Novae are distinct events from supernovae, which involve the complete destruction of a star.
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Complete Question:
T/F. a nova is a sudden outburst of light coming from an old main-sequence star.
laminated bamboo lumber can be currently used for building houses in the us. a. ture b. false
In the given statement, Laminated bamboo lumber has become a popular alternative to traditional lumber for building houses in the US is true.
It is a sustainable and renewable resource that is strong, durable, and resistant to pests and rot. It is also lightweight, making it easier to transport and handle on construction sites. Additionally, laminated bamboo lumber has a unique look that can add a modern and eco-friendly touch to any home design. As the demand for sustainable building materials increases, laminated bamboo lumber is likely to become even more widely used in the US and around the world.
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for a set of sedimentary rocks that are folded in a syncline, the oldest rocks are
For a set of sedimentary rocks that are folded in a syncline, the oldest rocks are found in the center of the syncline.
A syncline is a type of fold in which the layers of rock dip downward to form a trough-like structure. The oldest rocks are found at the bottom of this trough, as they were the first to be deposited on the sea floor or other sedimentary environment.
As new layers of sediment were deposited on top of the older layers, the weight of the overlying sediment caused the layers to compress and fold into the syncline structure. The rocks on the outer edges of the syncline are younger, as they were deposited later and have been folded over the older rocks.
Therefore, geologists can use the position of rocks within a syncline to determine their relative ages and the order in which they were deposited.
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arizona is one of 36 states which allow some form of referendum in their constitutions. (true or false)
True. Arizona is indeed one of the 36 states in the United States that allow some form of referendum in their constitutions.
A referendum is a mechanism that allows citizens to directly vote on a proposed law or policy. It is a form of direct democracy where the electorate can participate in decision-making processes.
In Arizona, the referendum process allows citizens to initiate or repeal laws, constitutional amendments, or other government actions through petition and subsequent voting.
The specific procedures and requirements for referendums may vary between states, but Arizona is among the states that have included provisions for this form of direct citizen participation in their state constitutions.
This allows the citizens of Arizona to have a voice in shaping public policy and exercising their democratic rights through the referendum process.
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the time of day when a summer sea breeze is likely to be strongest is question 5 options: midnight. 6 a.m. noon. 4 p.m. 10 p.m.
A summer sea breeze is a local wind system that develops in coastal areas as a result of the differential heating of land and water.
During the day, land heats up faster than water, which causes air to rise over the land and cool, creating an area of low pressure. This low pressure draws in cooler air from over the water, creating a sea breeze. The sea breeze tends to be strongest in the late afternoon, around 4 p.m., when land temperatures have reached their peak and the temperature difference between land and water is greatest. By evening, the sea breeze tends to weaken as the land cools off and the temperature difference between land and water decreases.
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why do the tropics and the windward side of mountains receive more rainfall than areas around latitudes 30 degrees north and south and the leeward side of mountains
The tropics and the windward side of mountains receive more rainfall because of the convergence of trade winds, which brings moist air to these regions.
The moist air rises and cools, causing condensation and precipitation. This process is enhanced by the fact that these regions receive more direct sunlight, leading to warmer temperatures and increased evaporation. In contrast, the areas around latitudes 30 degrees north and south and the leeward side of mountains receive less rainfall because the descending air is drier and warmer, resulting in less moisture and a reduced likelihood of precipitation. Additionally, the cold ocean currents on the western coast of continents can also contribute to aridity in these regions.
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Which of the following is a prediction of the Multiregional Model for the origins of modern humans? There was an abrupt separation of Homo erectus and H. sapiens populations. There was a single evolving lineage of Homo sapiens in each region of the Old World. Regional Homo erectus characteristics were replaced by those of H. neanderthalensis. Homo neanderthalensis did not interbreed with anatomically modern H. sapiens.
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A prediction of the Multiregional Model for the origins of modern humans is: There was a single evolving lineage of Homo sapiens in each region of the Old World.
The Multiregional Model proposes that modern humans (Homo sapiens) evolved independently in multiple regions of the world, including Africa, Europe, and Asia, from local populations of Homo erectus. According to this model, there was ongoing gene flow and interbreeding between different populations of Homo sapiens, leading to the gradual evolution of modern human traits in each region.
This means that each region had its own distinct lineage of Homo sapiens evolving over time, with some regional variations due to genetic and environmental factors. It contrasts with the Out of Africa theory, which suggests a single origin of modern humans in Africa with subsequent migration and replacement of other hominin populations. The Multiregional
Model proposes a more continuous and interconnected evolutionary process, emphasizing the importance of local adaptations and regional continuity in human evolution.
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which layer in the earth is similar in composition to an iron-nickel meteorite?
Answer: The outer core
Explanation:
the very large, lava-covered areas of the moon are called maria.
T/F
True. The large, lava-covered areas on the Moon are indeed called maria.
The term "maria" (singular: mare) is derived from Latin, meaning "seas." However, despite their name, maria are not actual bodies of water but vast basaltic plains formed by ancient volcanic activity. These dark, flat regions on the Moon's surface are visible to the eye and were mistaken for bodies of water by early astronomers. The maria were created by volcanic eruptions billions of years ago when magma from the Moon's interior flooded the low-lying areas and solidified into basalt. They are characterized by their relatively smooth texture compared to the heavily cratered highlands surrounding them. Today, the maria serve as important landmarks for lunar observations and studies.
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Nearly all the elements found in our environment were formed predominantly during the course of stellar evolution. The major exceptions are:
a. iron and nickel
b. silver and gold
c. hydrogen and helium
d. oxygen and carbon
e. oxygen and nitrogen
Answer:
oxygen and carbon.
Explanation:
they are the major elements.
the is a fundamental process on planet earth that involves different processes releasing carbon into the atmosphere, called , and different processes that add carbon to long-term storage locations, called .
The fundamental process on Earth that involves different processes releasing carbon into the atmosphere is called the carbon cycle.
The carbon cycle includes processes such as respiration, combustion of fossil fuels, and decomposition of organic matter. These processes release carbon dioxide (CO2) into the atmosphere. The different processes that add carbon to long-term storage locations are called carbon sinks. Carbon sinks include oceans, soils, and forests, which absorb CO2 from the atmosphere through processes like photosynthesis and oceanic absorption. The balance between carbon sources and sinks is crucial for maintaining a stable climate. However, increased carbon emissions from human activities have caused an imbalance in the carbon cycle, leading to climate change.
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How did the city try to improve the Downtown Eastside in the 1960s?
During the 1960s, the City of Vancouver, Canada attempted to improve the Downtown Eastside (DTES) neighborhood through a variety of urban renewal and social welfare initiatives.
Here are some of the key efforts made by the city during this time:
Urban Renewal: The city launched several urban renewal projects in the DTES during the 1960s, aimed at improving the physical infrastructure of the neighborhood. These included the construction of new social housing projects, such as the Strathcona Gardens development, and the expansion of community services like the Carnegie Community Centre.
Zoning Changes: The city implemented new zoning regulations in the DTES to try to limit the number of hotels and rooming houses in the area. The goal was to reduce the concentration of poverty and improve the overall livability of the neighborhood.
Social Welfare Programs: The city also invested in a range of social welfare programs during the 1960s, aimed at improving the quality of life for DTES residents. These included increased funding for mental health and addiction services, as well as the creation of job training and employment programs.
Policing: The city also increased its policing presence in the DTES during the 1960s, with the goal of reducing crime and improving public safety. This included the creation of a new police precinct in the neighborhood and the implementation of new policing strategies.
While some of these initiatives were successful in the short term, many have been criticized for their negative impacts on the DTES and its residents over the long term. For example, the urban renewal projects often involved the displacement of low-income residents and the destruction of historic buildings and cultural landmarks, while the increased policing presence led to a disproportionate targeting of marginalized communities. Today, the City of Vancouver continues to grapple with the complex social and economic issues facing the DTES and its residents.
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which are the dark colored productive grassland soils? mollisols andisols aridisols vertisols gelisols
The dark-colored productive grassland soils are known as mollisols. Mollisols are commonly found in temperate grasslands around the world, including the Great Plains in North America. These soils are known for their high fertility, organic matter content, and ability to retain moisture, making them ideal for agriculture.
They are characterized by a deep, dark-colored surface horizon, rich in humus and minerals, that forms under grassland vegetation. While other soil types like andisols, aridisols, vertisols, and gelisols can also support grassland ecosystems, they have different properties that make them less productive or less suitable for agriculture. In summary, if you are looking for a dark-colored, highly productive soil for grassland agriculture, mollisols are the way to go.
These soils are commonly found in regions with grasslands, such as the Great Plains in the United States and the Pampas in South America.
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Location (absolute and relative), regions, human-environment interaction (HEI), movement, place
The concept of geography encompasses various aspects that are critical in understanding the relationship between humans and their environment. Firstly, the location of a place can be described in absolute and relative terms.
Absolute location refers to the precise location of a place on the Earth's surface, while relative location refers to the position of a place in relation to other landmarks or regions.
Regions are areas of the Earth's surface that share common characteristics, such as physical features, language, and culture. Human-environment interaction (HEI) is a vital aspect of geography that describes the relationship between humans and their environment. This interaction can take various forms, such as the use of natural resources and the impact of human activities on the environment.
Movement refers to the flow of people, goods, and ideas between different places. It is essential in shaping the way humans interact with each other and their environment. Finally, a place can be described in terms of its physical and cultural characteristics that make it unique.
In summary, geography plays a critical role in understanding the environment and the relationship between humans and their surroundings. By examining location, regions, HEI, movement, and place, we can gain a better understanding of how these factors influence human activities and the environment.
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a major contributing factor to the lack of precipitation for the namib and atacama deserts are
A major contributing factor to the lack of precipitation in the Namib and Atacama deserts is their location and geography.
The Namib desert is located along the southwestern coast of Africa, while the Atacama desert is located along the western coast of South America. These regions are situated in the subtropical high-pressure belt, where descending dry air masses lead to a lack of precipitation. In addition to this, both deserts are surrounded by mountain ranges that block moisture-laden winds from reaching these areas, exacerbating the lack of precipitation.
Furthermore, the Atacama desert is known to be one of the driest places on earth due to the presence of the Andes mountains. The mountains act as a barrier, preventing the moisture from the Pacific Ocean from reaching the desert. The combination of these factors makes it extremely difficult for rain to form and fall in these regions. As a result, both the Namib and Atacama deserts have unique ecosystems that have adapted to the extreme conditions of aridity and lack of water.
In conclusion, while several factors contribute to the lack of precipitation in the Namib and Atacama deserts, the location and geography of these regions play a significant role in shaping their arid climates.
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what is the difference between direct detection and indirect detection of extra-solar planets?
Indirect detection is the condition in which an extra-solar planets cannot be observed but its presence is deduced from the activity of its host star. Direct detection occurs when the exoplanet is observable through a telescope.
In order to find extrasolar planets, astronomers have typically had to use indirect techniques. As of 2016, a variety of indirect detection has been successful. By analyzing the impacts the planet has on its parent star, scientists deduce its presence rather than actually finding the planet.
Compared to the distances between stars, the extrasolar planet's separation from its star is extremely small. The light reflected from any extrasolar planet circling a star similar to the sun is approximately a billion times brighter than the star itself. Due to diffraction, telescopes also distort starlight. Since their parent stars are significantly brighter than our sun, extrasolar planets are just too close to them to be directly observed from interstellar distances.
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What is it called when a country implements emission reduction projects in other industrialized countries?
Answer:The Clean Development Mechanism (CDM)
Explanation:The Clean Development Mechanism (CDM), defined in Article 12 of the Protocol, allows a country with an emission-reduction or emission-limitation commitment under the Kyoto Protocol (Annex B Party) to implement an emission-reduction project in developing countries. Such projects can earn saleable certified emission reduction (CER) credits, each equivalent to one tonne of CO2, which can be counted towards meeting Kyoto targets.
wind shear is: question 2 options: responsible for orographic lifting the phenomenon responsible for lightning caused by wind traveling in different directions or at different speeds at different levels none of these answers
Wind shear is the phenomenon of wind traveling in different directions or at different speeds at different levels.
This can cause a sudden change in wind speed and direction, which can be dangerous for airplanes during takeoff and landing. Wind shear can also cause orographic lifting, which occurs when wind flows up and over a mountain, resulting in cooler temperatures and increased precipitation on the windward side. Orographic lifting is an important factor in weather patterns, as it can lead to localized areas of heavy rain or snowfall. Wind shear is not responsible for lightning caused by wind, as lightning is typically caused by the buildup of electrical charges within a thunderstorm. In conclusion, wind shear and orographic lifting are important meteorological concepts that play a significant role in weather patterns and aviation safety.
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Due to close ties with the Byzantine empire, what religion was adopted by a majority of Russians?
A. Roman Catholicism
B. Judaism
C. Eastern Orthodox
Answer:
Eastern Orthodox religion was adopted by amajority of Russians
Explanation:
Which rock type below is a chemical sedimentary rock composed of silica (SiO2)?
Breccia
Gypsum
Coquina
Chert
Chert is a chemical sedimentary rock composed of silica (SiO2).
Chert is a type of chemical sedimentary rock that is primarily composed of microcrystalline or cryptocrystalline silica, which is the mineral form of silicon dioxide (SiO2). It forms from the accumulation of microscopic silica particles, such as from the remains of marine organisms or from the precipitation of dissolved silica in water.
Chert is typically dense, hard, and brittle, and it often exhibits a conchoidal fracture. Its color can range from white to gray, brown, or black, depending on impurities present in the silica. Chert can occur in various forms, including nodules, concretions, or layers within sedimentary rocks.
The presence of silica in chert distinguishes it from other sedimentary rocks listed in the options. Breccia is a clastic sedimentary rock composed of angular fragments, gypsum is a evaporite mineral composed of calcium sulfate, and coquina is a clastic sedimentary rock made up of shell fragments. Chert, on the other hand, is a chemical sedimentary rock specifically composed of silica.
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Changes in topography, water chemistry, and gas output all are used to help predict:
a) volcanic eruptinons b) mudflows c) landslides d) harmonic tremors
Changes in topography, water chemistry, and gas output all are used to help predict a) volcanic eruptions.
Changes in topography, water chemistry, and gas output are all important indicators used in monitoring and predicting volcanic eruptions. Here's how these factors play a role:
Topography: Monitoring changes in the shape and elevation of the volcano can provide valuable information. Swelling or deformation of the volcano's surface, measured using techniques like GPS and satellite-based interferometry, can indicate the movement and accumulation of magma beneath the surface. Bulges, fissures, or changes in the volcano's shape may suggest increased volcanic activity and the potential for an eruption.
Water Chemistry: Monitoring changes in water chemistry, particularly in geothermal areas or volcanic lakes, can provide insight into volcanic activity. Rising magma can interact with groundwater or surface water, leading to changes in the composition and temperature of the water. An increase in the concentration of certain chemicals, such as sulfur compounds or volcanic gases, can serve as a precursor to an eruption.
Gas Output: Volcanoes emit various gases, including sulfur dioxide (SO2), carbon dioxide (CO2), hydrogen sulfide (H2S), and others. Monitoring changes in the amount and composition of volcanic gases can help assess volcanic activity. Increasing gas emissions, particularly sulfur dioxide, can indicate the movement and ascent of magma towards the surface. Gas measurements can be done using ground-based stations, aerial surveys, or satellite-based remote sensing.
By analyzing these indicators along with other monitoring techniques like seismic activity, ground temperature measurements, and volcanic tremors (which could be referred to as harmonic tremors), scientists and volcanologists can gain a better understanding of volcanic behavior and make informed predictions about potential eruptions. These monitoring systems help in assessing the level of volcanic hazard and providing timely warnings to at-risk populations, aiding in mitigation efforts and ensuring public safety.
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drought triggered by human activities
Answer: Deforestation – plants and trees release water into the atmosphere, which creates clouds and then rain.
Explanation: Bad agricultural practices like intense farming not only contribute to deforestation in the first instance but also affect the absorbency of the soil, meaning it dries out much quicker.
as we go outward from io to ganymede, the density of the moons _____.
As we go outward from Io to Ganymede, the density of the moons decreases.
The four largest moons of Jupiter, known as the Galilean moons, are Io, Europa, Ganymede, and Callisto. These moons vary in size and composition.
When moving from Io to Ganymede, the density of the moons generally decreases. Io, the closest moon to Jupiter, has the highest density among the four. It is primarily composed of silicate rock and exhibits intense volcanic activity. Europa, the next moon in line, has a slightly lower density. It is believed to have a rocky mantle and a subsurface ocean of liquid water. Ganymede, the largest moon in the solar system, has a lower density compared to Io and Europa.
It has a differentiated structure with a rocky core, a thick ice mantle, and possibly a subsurface ocean. The trend of decreasing density from Io to Ganymede can be attributed to differences in their compositions and internal structures.
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Greenwich Mean Time is measured from:
A. 0° latitude B. 0° longitude C. 90° latitude D. 180° longitude E. 90° longitude
Greenwich Mean Time is measured from 0° longitude.
The time on the Earth's meridian, or zero-degree line of longitude, is known as Greenwich Mean Time (GMT). This passes via the Old Royal Observatory in the London district of Greenwich on its way from the North Pole to the South Pole.
The International Date Line, which separates East (GMT+) and West (GMT-), is located on the other side of the globe from the Greenwich Mean Time. The 180° meridian, which traverses the Pacific Ocean from north to south, has been modified. A GMT day used to begin at noon according to astronomers, but it began at midnight for nearly everyone else.
Option B is the correct answer.
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what causes a wave approaching the beach at an angle to break parallel to the beach?
When a wave approaches the beach at an angle, the part of the wave closest to the shore encounters shallow water before the rest of the wave.
This slows down the wave front, causing the wave to refract, or bend, toward the shallower water. As a result, the wave crest becomes more parallel to the shoreline. When the depth of the water is about 1.3 times the wave height, the wave breaks, which means that the crest of the wave topples forward and forms a breaker. The wave energy is then dissipated as turbulence and currents in the surf zone. This breaking of the wave parallel to the beach is called a spilling breaker.
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