As we go back to older and older generations of stars, they contain less and less of what?A : HydrogenB : HeliumC : CometsD : 'metals' (anything other than H and He)
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As we go back to older and older generations of stars, they contain less and less of option D: 'metals' (anything other than H and He).
As we look at older generations of stars, they contain less and less elements other than hydrogen (H) and helium (He), often referred to as "metals" in astronomy. These elements, collectively known as metals in astronomy, are synthesized in later generations of stars through nuclear fusion processes. The oldest stars in the universe, such as Population III stars, are believed to have formed from the primordial gas composed mainly of hydrogen and helium, with very small amounts of other elements.
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As we go back to older and older generations of stars, they contain less and less of D: 'metals' (anything other than H and He).
As stars evolve, they go through different stages of nuclear fusion, which involves the conversion of hydrogen into helium and, in later stages, the fusion of helium into heavier elements. However, as stars continue to evolve, they eventually exhaust their hydrogen and helium fuel, leading to the synthesis of heavier elements through processes like stellar nucleosynthesis. These heavier elements, often referred to as 'metals' in astrophysics (even though they may not necessarily be metallic in nature), are produced through various nuclear reactions within the cores of stars. Examples of these elements include carbon, oxygen, nitrogen, iron, and so on. As stars in later generations form from the remnants of previous generations, they inherit a greater abundance of these heavier elements, leading to the decrease in the relative abundance of hydrogen and helium compared to earlier generations of stars.
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Related Questions
Please someone help
Answers
\(▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪\)
The lithosphere is the Crust and uppermost mantle
Answer: A
Explanation: The lithosphere is the rocky outer part of the Earth. It is made up of the brittle crust and the top part of the upper mantle. The lithosphere is the coolest and most rigid part of the Earth.
Identify the following steps in the development of a karst landscape by dragging them to the correct targets ACaves form below water table. Water- table RWater table sinks; new caves form. c ) New caves get bigger Water table Old caves empty; speleothems Sinkhole grow Caves collapse; karst landscape develops. Water able
Answers
Here are the correct steps in the development of a karst landscape and their corresponding targets:
A) Caves form below the water table.
B) Water table sinks; new caves form.
C) New caves get bigger as water table continues to sink.
D) Old caves empty; speleothems (cave formations such as stalactites and stalagmites) form.
E) Sinkholes grow as the roof of the caves collapses.
F) Caves collapse, and a karst landscape develops.
Karst landscapes are formed through the dissolution of soluble rocks, such as limestone, by groundwater. The process starts with the formation of caves below the water table. As the water table sinks due to the continuous erosion of the rock, new caves are formed and the existing ones get bigger. As the water continues to drain, the old caves empty, leaving behind speleothems. The roof of the caves can eventually collapse, leading to the formation of sinkholes, and the caves themselves can collapse, leading to the development of a karst landscape with features such as towers, valleys, and underground rivers.
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what is the reason for the difference in the salinity of sea water at different latitudes
Answers
Answer:
The temperature and evaporation rates determine the salinity of seawater and its variations at different latitudes.
Explanation:
The seawater is saline. This basically means that it contains salt in it in amounts that are high enough to make it salty. The water in the sea is saline because of the enormous amounts of salt on the rocks that are covered with seawater, so the salt dissolves into the water, mixes with it, and gives its salinity. The salinity is not the same everywhere though and there are great variations.
The seawater tends to have the highest salinity near the in the lower latitudes, thus at the tropical areas, while the salinity is the smallest at the high latitudes, thus around the poles. This is due to the difference in temperature and based on it, rates of evaporation. At the lower latitudes, the temperatures are constantly high so the evaporation rates are constantly high as well. This leads to a higher concentration of salt in the water. In the higher latitudes, the temperature is very low so the evaporation is very low as well. This leads to a smaller concentration of salt in the water.
14.) A cost is an expenditure, such as time or money, that someone must spend to
obtain a goal. A benefit is an advantage or reward you gain from some type of effort.
When trying to decide if you should produce a particular product, why would it be a
good idea to examine the costs and benefits of making that product?
a.) To help you determine if the costs will outweigh the benefits, ultimately
yielding you a
profit
b.) To help you
determine if the benefits will outweigh the costs, ultimately
yielding you a
profit
c.) To help you determine if the company is going to use a barter or monetary
system
d.) To help you determine if the company is going to distribute its resources to
other companies
Answers
Answer:
a.) To help you determine if the costs will outweigh the benefits, ultimately
yielding you a
profit
Little Rock, AR was still under the influence of the East Coast high. The wind at Little Rock, where the pressure was plotted "122," meaning 1012 mb, showed the air was moving generally toward the at 5kis. A. North b. Southc. Westd. Cast
Answers
What is the image of the point (1,5) after a rotation of 180∘counterclockwise about the origin?
Answers
the image of the point (1, 5) after a 180-degree counterclockwise rotation about the origin is (-1, -5).
To find the image of the point (1, 5) after a rotation of 180 degrees counterclockwise about the origin, we can use the following transformation rule:
For a rotation of θ degrees counterclockwise about the origin, the coordinates (x, y) of a point are transformed to (-x, -y).
Applying this rule to the point (1, 5) for a 180-degree counterclockwise rotation, we have:
(-1, -5)
Thus, the image of the point (1, 5) after a 180-degree counterclockwise rotation about the origin is (-1, -5).
To understand this transformation visually, imagine a Cartesian coordinate plane with the origin at (0, 0). The point (1, 5) is located in the first quadrant, above the x-axis and to the right of the y-axis. After a 180-degree counterclockwise rotation, the point will be reflected across both axes and end up in the third quadrant, below the x-axis and to the left of the y-axis. The x-coordinate changes from 1 to -1, and the y-coordinate changes from 5 to -5.
This transformation can also be visualized by imagining a line connecting the origin to the point (1, 5) and rotating it 180 degrees counterclockwise. The line will flip and extend in the opposite direction, resulting in the new position of the point (-1, -5).
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What is the typical setting of a sea cave or sea stack?
a) within a protected bay
b) on a barrier island
c) on a sandbar
d) on a badmouth bar
e) on a promontory
Answers
The typical setting of a sea cave or sea stack is on a promontory. The correct answer is option (e).
A sea cave is a geological formation that occurs when waves erode a rocky cliff face, creating a cavity within the rock. Sea stacks are also formed by wave action, but they result in a tall, isolated rock formation rather than a cave. Both sea caves and sea stacks are often found along coastlines where wave action is strong and frequent.
A typical setting of sea caves and sea stacks: Sea caves and sea stacks are typically found in rocky coastal areas with a promontory. Therefore, the correct option is option (e).
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the correct labeling from the air lyer closest to earth's surface to the one farthest from the surface would be
Answers
The correct labeling of the atmospheric layers closest to Earth's surface to the one farthest from the surface is: Troposphere, Stratosphere, Mesosphere, Thermosphere, and Exosphere.
The Troposphere is the closest layer to the Earth's surface and is the layer in which all weather occurs. It extends from the Earth's surface to an altitude of about 7 miles (11 km). The Stratosphere is the second layer of the atmosphere and extends from the tropopause to an altitude of about 30 miles (50 km). Here, ozone absorbs ultraviolet radiation from the Sun, preventing it from reaching the Earth's surface.
The Mesosphere extends from the stratopause to an altitude of about 53 miles (85 km). This is the coldest layer of the atmosphere, with temperatures dropping to -90°C. The Thermosphere extends from the mesopause to an altitude of about 310 miles (500 km). This is the layer where the aurora borealis occurs.
The Exosphere is the outermost layer of the atmosphere and extends from the thermospause to an altitude of about 6,200 miles (10,000 km). This is the region where the Earth's atmosphere merges with space.
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Which statements BEST describes the impact of the Sahara on the population in the region? A) There no cities in the Sahara making jobs scarce. B)The population in the area is very dense and crowded. C) The majority of the people across the Sahara by camel. D) The climate is lush and it is considered a good place to live. E) Very few people live in the Sahara because the climate is very hot and there is little or no water.
Answers
Answer: A and E
Explanation: I did the USA testprep
The following statements best describe the impact of the Sahara on the population in the region.
There are no cities in the Sahara making jobs scarce.Very few people live in the Sahara because the climate is very hot and there is little or no water.The correct option is A and E.
Why is it hard to live in the Sahara?The Sahara has a hostile climate, making it difficult for any life to exist there. It is windy, hot, and dry. Despite the heat of the day, the nighttime temperature can change drastically. occasionally to below freezing.
Stronger evaporation over the ocean is a result of rising temperatures, and the resulting condensations then fall as rain on dry land. In the central Sahara, it rains more frequently, particularly in the summer. There are also torrents, as has been reported, and these are said to have submerged the dry valleys four meters.
Thus, the ideal selection is options A and E.
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What do the Aborigines call Ayers Rock?
The Coral Rock
The Great Barrier Reef
Uluru
The Outback Rock
Answers
Answer:
Uluru
Explanation:
what are the things that we need to consider in raising animals
Answers
Answer:
We need some:
• Take care of them
• Foods for your raising animal
• Water or milk
• Bed or little house of your raising animal
• Bath them every day
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Hope it helps
Your welcome :)
I need 2 paragraphs of the 3 most important reasons to study geography(ASAP)
Answers
Answer:
I hope I am not late but here it is, also if you're not American lmk, Ill change it lol
Explanation:
Geography is a subject which involves learning all about countries. One important reason why geography is an essential topic is to know how countries of the world function. In this subject, people learn about the continents and what's in them. This makes people learn if a country is landlocked or not, and about their boarders, which can help you understand natural resources and conflicts.
Geography can also assist you in knowing about time. There are 24 time zones total, the United States having Hawaii-Aleutian time, Alaska time, Pacific time, Mountain time, Central time and Eastern time. These time zones depend on where the sun rises first. Lastly, geography helps us understand history. They are two similar subjects which have a lot in common. Knowing basic geographic facts can make history much easier, since you will be aware of the areas where events take place in.
the northern hemisphere winds spiral out from a high pressure area clockwise to form a(n) _____ and spiral into a low pressure area counterclockwise to form a(n) _____ .
Answers
In the Northern Hemisphere, winds spiral out from a high-pressure area clockwise to form an anticyclone, and spiral into a low-pressure area counterclockwise to form a cyclone.
In the Northern Hemisphere, winds follow a particular pattern based on the air pressure.
When there is high air pressure in an area, the winds spiral outwards in a clockwise direction, forming an anticyclone. Conversely, when there is low air pressure, the winds spiral inwards towards the center in a counterclockwise direction, forming a cyclone.
This is due to the Coriolis effect, which causes objects (in this case, air molecules) to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. Understanding these wind patterns can be helpful for predicting weather and tracking storm systems.
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The high school students who attend Washington Preparatory Academy choose their elective classes according to their majors. Students are 37% likely to major in Performing Arts; 43% likely to choose Science and Technology; 82% likely to major in Business and Management; and 63% likely to select Humanities. Many students choose multiple majors. For example, some Science and Technology students also major in Business and Management because they want to be managers in technical companies. Students have equal probabilities of being freshmen, sophomores, juniors, or seniors.
If Event A = sophomore or senior, what is Event A’?
Group of answer choices
Answers
Answer:freshmen or junior
Explanation:
got it right
As per the rule of probability, the Event A' will be consisting of freshmen or seniors.
What is the rule of probability?
As per the probability, an event is regarded as the chances of drawing the contents such event consist of. Similarly, an Event' is the probability of all the other items remaining in the event.
Hence, the probability of the Event A' consists of freshmen or seniors.
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according to the theory of plate tectonics, group of answer choices slow motions within the mantle of the earth move large sections of the crust around the continents are moving but the ocean floor is not, leading to great friction earthquakes are caused by huge waves that come up from inside the molten core of the earth the liquid metal inside the earth is developing plates of solid metallic material, which contribute to the earth's magnetic field the rubbing of the waters of the earth across its crust is speeding up its rotation
Answers
According to the theory of plate tectonics slow motions within the mantle of the Earth move large sections of the crust around.
According to the scientific hypothesis of plate tectonics, the underground movements of the Earth create the primary landforms. By explaining a wide range of phenomena, including as mountain-building events, volcanoes, and earthquakes, the theory, which became firmly established in the 1960s, revolutionized the earth sciences.
In plate tectonics, the Earth's lithosphere, which is composed of the crust and upper mantle, is divided into sizable rocky plates. These plates are situated on top of the asthenosphere, a rock layer that is still partially molten. The plates move apart from one another at varying rates as a result of the convection of the asthenosphere and lithosphere.
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The increasing economic, cultural, political, and social connections between people around the world is called __________. a. the world marketplace b. socialization c. connectivity d. globalization
Answers
Answer:
D.
Explanation:
I think it’s globalization. I think it’s this because, globalization is pretty much just being social as well as globally social at the same time.
Answer:
D. globalization
Explanation:
___ occur(s) when the Earth comes out of an ice age.
A. Global cooling
B. Solar flares
C. Global warming
D. Axis movement
Answers
identify a potential sustainable agricultural practice to reduce the impact of large-scale intensive agriculture on soils.
Answers
Planting of cover crops is a potential sustainable agricultural practice to
reduce the impact of large-scale intensive agriculture on soils.
Importance of Cover cropsCover crops are planted as a result of its usefulness in the following
Prevents erosion.Replenishes the soil with nutrients.Reduces weed growth.The reasons mentioned above will ensure that the impact of large-scale
intensive agriculture on soils is reduced to the barest minimum.
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TOPOGRAPHIC MAPPING - Question is in the attached image.
Please do questions 1-5.
Please help, I don't understand Topographic Mapping.
Answers
a. Airfield terminal building is 719265
What is a map?A map is a visual depiction of specific features of a location, typically created on a smooth surface. Maps provide straightforward, visible information about the globe.
b. Mine in the western sector of the map is 668288
c. Intersection of highway 3 and highway 7 is 699284
d. The center of the swamp near the airport is 709266
e. Center of the bridge crossing Bryce River on highway 3 is 688304
2. the distance along Pioneer Trail from 670277 to 720286 came to approximately of 5.5 km
3. the approximate height of the peak in the northeast quadrant of the map is around 481 to 519 meters. This is because there is an interval in the value of 40
4. the length of the runway at the airfield is 75 km.
5. the approximate area of the swamp land northwest of the airfield will be \(0.5km^2\)
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What astronauts are currently on the international space station.
Answers
As of August 2021, there are seven astronauts on board the International Space Station (ISS).
Below is the list of the current astronauts on the ISS: Oleg Novitsky, Pyotr Dubrov, and Mark Vande Hei of Roscosmos (Russia). Thomas Pesquet of the European Space Agency (France), Akihiko Hoshide of JAXA (Japan), Shane Kimbrough of NASA (United States), and Megan McArthur of NASA (United States).
Each astronaut on board the ISS has unique tasks and responsibilities. They conduct experiments, perform maintenance, and operate the station's systems. The crew also conducts spacewalks to perform necessary repairs and upgrades to the station. The ISS is a collaborative effort between multiple countries and agencies, and the crew is typically made up of a mix of astronauts from different countries.
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Which of the following is an example of an effect of the Vietnam War on Oklahoma in the 1970s?
A.
No Oklahomans were killed or wounded as servicemen in the Vietnam War.
B.
A 1972 mass student protest on Oklahoma State University’s campus caused National Guardsmen to shoot at protesters.
C.
Many South Asian refugees settled in Oklahoma, forming new communities in Oklahoma City.
D.
Oklahoma’s schools and universities were free from protests against the war.
DON'T DO B IT IS WRONG ON EDGE
Answers
Answer:
The answer is C.
Explanation:
(See picture)
Hope this helps, and have a good day!
Answer:
The correct answer is C I got a 100% on my quiz on Edge^nuity also can I plz have Brainliest
Explanation:
Where do you think
an earthquake is more likely to occur? Along
North America's Pacific coast or along North
America's Atlantic coast? Why?
Answers
Answer: Pacific coast because there are a lot more fault lines along the coast
Explanation:
Answer:
The answer to your question is North America's Pacific coast
Explanation:
Over 80 per cent of large earthquakes occur around the edges of the Pacific Ocean, an area known as the 'Ring of Fire'; this where the Pacific plate is being subducted beneath the surrounding plates.
The Earth's crust is made up of several pieces called tectonic plates and most earthquakes occur along their edges. The plates under the oceans are called oceanic plates. Plates that are not under the ocean are continental plates.
I hope this helps and have a great day!
Why climate change has been a very difficult issue to
address? How economics can be used to understand and address the
issue of climate
change?
Answers
Climate change has been a difficult issue to address due to its complex nature, global scope, and various interconnected factors. Economics can be used to understand and address the issue by considering the costs and benefits of climate action, designing effective policy instruments, and promoting sustainable practices.
1. Climate change is a multifaceted challenge that involves scientific, political, social, and economic dimensions. It encompasses a wide range of factors, including greenhouse gas emissions, energy consumption, land use, and global cooperation. The complexity of the issue makes it difficult to achieve consensus and implement effective solutions.
2. Economics provides a valuable framework for understanding climate change by analyzing the costs and benefits associated with mitigation and adaptation measures. It helps assess the economic impacts of climate change, such as damage to infrastructure, agricultural productivity, and human health. Economic analysis also helps identify cost-effective strategies and evaluate policy options.
Economics can contribute to addressing climate change by integrating environmental considerations into decision-making processes. It enables the development of market-based mechanisms, such as carbon pricing and emissions trading, which create incentives for reducing emissions and investing in cleaner technologies. By considering the economic implications, policymakers can design policies that balance environmental goals with economic growth and societal well-being.
Moreover, economics highlights the potential benefits of transitioning to a low-carbon economy. Investments in renewable energy, energy efficiency, and sustainable infrastructure can drive economic development, create jobs, and enhance competitiveness. Understanding the economic opportunities associated with climate action can incentivize private sector engagement and drive innovation.
In summary, the difficulty of addressing climate change stems from its complexity, global nature, and intertwined factors. Economics provides a useful lens for comprehending the issue and offers insights into the costs, benefits, and policy instruments needed to tackle it effectively.
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Im so confused. I need help badly.
Answers
Answer:
B
Explanation:
They are rubbing past each other.
Answer:
Bbbbbbbbbbbbbbbbbbbbbbb
Name the type of vegetation grows in wet & marshy soil.
a)Grasslands b) Mangroves b) Cactus d) Alpine vegetation
Answers
Answer:
Mangroves
Mangroves are defined as assemblages of salt tolerant trees and shrubs that grow in the intertidal regions of the tropical and subtropical coastlines. They grow luxuriantly in the places where freshwater mixes with seawater and where sediment is composed of accumulated deposits of mud.
The creation of mountains can best be described as-
Answers
Answer:
Tectonic plate motions generate volcanoes around the boundary of the plate, which erupt and form the mountains. A volcanic arc structure is a sequence of volcanoes forming near a subduction zone where the surface of a sinking oceanic plate melts and drags water down with the subducting crust.:
describe and explain 3 reasons why the UK
government has invested in improving transport
infrastructure
Answers
Answer:
Three(3) reasons why the UK government has invested in improving transport infrastructure is to ensure the economy improves through an efficient movement of goods and services to different parts of the country and world at large.
Another reason is to provide employment opportunities to the people through various openings in the sector.
Investing in transport sector will allow for an easier way or doing business and attract foreign investors too.
you have a 100 cm3 sample of soil a. the sample is oven dried and weighed. the weight is 160 g.
Answers
Density = Mass / Volume
= 160 g / 100 cm^3
= 1.6 g/cm^3
This means that the soil sample has a density of 1.6 grams per cubic centimeter.
how are igneous rocks formed? write in short. pls help to solve this answer
Answers
Because Fargo, North Dakota is deep within North America, it has ________ than Seattle, Washington, which is near the Pacific Ocean.
Answers
As a result of Fargo and Seattle being in such different areas on the North American continent, they have different climates.
Why are their climates different?Climate is a product of the environment and these two cities are in different environments. Seattle is affected by the Pacific ocean while Fargo cannot be as affected as Seattle.For this reason, they will experience different climates. It would be for instance, more likely that Seattle is cooler than Fargo because areas near the ocean are generally cooler than related areas that aren't.
In conclusion, they have different climates.
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