The average space between molecules is about 30 angstroms or 3 nm.
Explanation:
Atomic spacing refers to the distance between the nuclei of an atoms in a material.This space is large compared to the size of atomic nucleus and is related to the chemical bonds which binds together.
The Atomic spacing is defined by using laws of diffraction and by passing electromagnetic waves called frequency through the material.
Gas is a state of matter that has no fixed shape and no volume.
A circular Flower bed is 20 m in diameter and has a circular sidewalk around it that is 3 m wide. Find the area of the sidewalk and square meters.
Answer: [tex]216.76 m^{2}[/tex]
Explanation:
Assuming the shape of the circular flower bed with its sidewalk is as shown in the figure, where the flower bed is the inner white circle and the sidewalk is the black part; we have to circles, hence two areas:
[tex]A_{1}=\pi R^{2}[/tex] (1)
And:
[tex]A_{2}=\pi r^{2}[/tex] (2)
Where:
[tex]A_{1}[/tex] is the area of the outer circle
[tex]A_{2}[/tex] is the area of the inner circle
[tex]r=\frac{diameter}{2}=\frac{20 m}{2}=10 m[/tex] is the radius of the inner white circle
[tex]R=10 m+ 3 m=13 m[/tex] is the radius of the outer black circle
So, the area of the sidewalk will be:
[tex]A=A_{1}-A_{2}[/tex] (3)
Substituting (1) and (2) in (3):
[tex]A=\pi R^{2}-\pi r^{2}[/tex] (4)
[tex]A=\pi (R^{2}-r^{2})[/tex] (5)
Solving with the given data:
[tex]A=\pi ((13 m)^{2}-(10 m)^{2})[/tex] (6)
[tex]A=\pi ((13 m)^{2}-(10 m)^{2})[/tex] (7)
Finally:
[tex]A=216.76 m^{2}[/tex] This is the area of the sidewalk
Which of the following is not an example of a study within human geography?Giving an address, such as “1000 Elysian Park Avenue, Los Angeles, CA,” is an example of describing the __________ of a place.
Answer:
absolute location
What did the early followers of Islam, Judaism, and Christianity all have in common?
a.
They all believed that Muhammad was a prophet.
b.
They all believed that Jesus was the son of God.
c.
They all believed that there were many gods.
d.
They all believed that there was only one God.
Answer:
d
Explanation:
Which of the following is NOT an impact caused by dams?
A.
Decaying plants change the water’s chemistry.
B.
Downstream rivers are deprived of water.
C.
Fish ladders are quite successful in letting fish
swim upstream to spawn.
D.
Wetlands dry up.
E.
Downstream waterfalls are lost.
Answer:
E.)Fish ladders are quite successful in letting fish swim upstream to spawn.
Explanation:
The option stating that 'Fish ladders are quite successful in letting fish swim upstream to spawn' is not a direct impact caused by dams but a solution to mitigate an impact, specifically the blockage of fish migration paths.
The question "Which of the following is NOT an impact caused by dams?" touches on important environmental effects related to dam construction. Among the options given, C. Fish ladders are quite successful in letting fish swim upstream to spawn is NOT a direct impact of dams but rather a mitigation effort to alleviate one of the impacts. Dams have significant environmental consequences, including altering river habitats, blocking fish migration, changing water temperature and chemistry, and reducing downstream water flow, which can lead to loss of wetlands and downstream waterfalls, amongst other effects. However, fish ladders are engineered structures designed to help migratory fish bypass dams, and while they represent an effort to address one of the negative impacts of dams on ecosystems, their existence and success rate do not negate the overall adverse effects caused by dam construction.
The supply of freshwater and its distribution around the world is controlled by __________.
A.
the construction of dams
B.
the location of aquifers
C.
the water cycle
D.
human consumption
the answer is C. water cycle
Answer: The Answer is C. The water cycle
Explanation: You already answered the question but I figured I would just clarify.
Answer:
its water cycle
Explanation:
like the dude said votes please too:)
Each cycle of spreading and intrusion of magma during seafloor spreading results in ____.
magnetic reversals
new ocean crust
subduction
plates colliding
Answer:
new ocean crust
Answer:
B
Explanation:
Explain how and why imperialism and the alliance systems both contributed to the outbreak of ww1
Imperialism of European states led to the dissatisfaction of some, especially Germany, and that is why they started creating political and military alliances.
Explanation:
The first group consisted of England, France and Russia with their allies (the Entente), seeking to protect their "legal rights" acquired in colonial conquests, while the second group was represented by belligerent Germany and its ally Austria-Hungary (Central Powers), who were dissatisfied with their status. So they sought to gain as much as possible from the already conquered colonial territories. As this was almost impracticable, Germany and Austria-Hungary decided to conquer the territory which the Ottoman Empire had already occupied under their rule.Learn more on Entente on
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Which of the following is NOT a skill scientists use to learn about the world?
a. Predicting
C. Inferring
b. Observing
d. Scientists use all of the above skills
Please select the best answer from the choices provided
O A
ooo
The correct answer to the student's question is d. Scientists use all of the above skills, which include predicting, inferring, and observing, as part of the scientific method and inquiry process.
Explanation:The skill that is NOT used by scientists to learn about the world is:
PredictingInferringObservingScientists use all of the above skills
The correct answer is d. Scientists use all of the above skills. Predicting, inferring, and observing are all essential skills utilized in the process of scientific inquiry. For instance, observing is a fundamental part of the scientific method, as it involves gathering data and evidence. Inferring allows scientists to make logical conclusions based on their observations. Predicting involves making educated guesses about future events or outcomes based on current evidence and understanding.
It's important to note that the scientific method includes steps like forming a hypothesis, which is essentially a prediction that can be tested, and running experiments to infer causality. Moreover, the ability to predict is crucial for developing new theories and models in science.
Select all the correct answers.
Which statements are true of a white dwarf?
It has a red shell.
It is the result of the core collapse of a low-mass star that sheds its outer layers.
It emits massive amounts of light compared with other stars.
It strongly attracts all matter or energy that comes near it.
It cools down to become a black dwarf.
Answer:
It is the result of the core collapse of a low-mass star that sheds its outer layers. it cools down to become a black dwarf.
Explanation:
The true statements about a white dwarf are:
It is the result of the core collapse of a low-mass star that sheds its outer layers.It cools down to become a black dwarf.What are the characteristics of a white dwarf?A white dwarf is formed from the remnants of a low-mass star after it has undergone core collapse and shed its outer layers. As it continues to radiate its residual heat, it cools down over billions of years until it eventually becomes a black dwarf, a cold, dark celestial object.
The concept of a white dwarf emitting massive amounts of light compared to other stars is not accurate, and the idea that it strongly attracts matter or energy that comes near it is also not true.
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Which of the following igneous rock textures is most likely to have formed below Earth's surface?
glassy
aphanitic
phaneritic
Phaneritic
Explanation:
Igneous rock textures most likely to have formed below the earth's surface are termed phaneritic textures.
A rock texture is the arrangement of minerals in a mass of rock body.
During crystallization of melt, different texture attributes can be used to delineate the environment where a rock forms.
Rocks that cools beneath the earth crust are called intrusive igneous rocks. They allow for enough time for mineral grains to grow due to little nucleation centers forming at the same time.
Big grains of minerals gives the rock mass a coarse texture said to be phaneritic.
Extrusive and volcanic rocks usually forms glassy and aphanitic textures.
Carlos is having a party in his backyard. He decides to put up a canopy from each corner of his
deck in case it rains. The deck (and the canopy) is in the shape of a quadrilateral.
1) Draw an x-axis and a y-axis on your graph paper. Label each axis. (5 pts)
2) Plot the following points on the graph paper and label each point.
A (-10, 3)
B) (0, 9)
C) (12,5)
D (-4,-7).
These are the corners of his deck. (20 pts)
3) Connect these points with a ruler to make the quadrilateral that is his deck. (5 pts)
After the canopy is up, Carlos' sister, Mireya, wants to hang some party lights underneath the
Cho will ice the midpoints of each side of the canopy. You must graph each midpoint
Answer:
B
Explanation:
I don't recommend this because i guessed.
How many “plates” total are there on earth
Have advances in agriculture improved the human condition, or have the benefits of the Green Revolution been limited to a few geographic regions?
Answer:
Yes, the benefits of the Green Revolution have been limited to a few geographic regions only.
Explanation:
In countries like the United States, Argentina, India, etc., the Green Revolution changed the picture of how agriculture yielded output by multiplying it owing to the advances in the methods of doing farming. Mechanized farming, hybridization of seeds, chemical fertilizers, etc., made farming more profitable in some parts of the world. On the other hand, the phenomena of the Green Revolution failed to work in most African and West Asian countries.Final answer:
The Green Revolution significantly increased global food production and reduced famine by introducing high-yield crop varieties and advanced farming techniques. However, it also led to environmental damage, social inequalities, and a dependency on unsustainable agricultural inputs. Critics emphasize the importance of smallholder farmers and call for a shift towards more sustainable practices.
Explanation:
Have advances in agriculture improved the human condition, or have the benefits of the Green Revolution been limited to a few geographic regions? Advances in agriculture, particularly those stemming from the Green Revolution, have had a profound impact on global food production, leading to significant increases in crop yields through the development of high-response varieties (HRV) of essential crops, expanded irrigation infrastructure, and the use of artificial fertilizers and pesticides. While these innovations have undoubtedly contributed to the reduction of famine and helped regions like China and India achieve self-sufficiency in basic foods, they have also led to several unintended consequences.
Increased reliance on chemical inputs and high-yield varieties has contributed to environmental degradation, loss of agricultural biodiversity, and has exacerbated social inequalities, particularly in developing regions. The rapid adoption of western, capital-intensive farming methods has favored large-scale operators and agribusinesses, leading to a widening gap between rich landlords and landless peasants, and escalating farmer debts in countries like India. Critics argue that the real backbone of global food security remains in the hands of smallholder and subsistence farmers, who are said to feed the majority of the world's population despite the focus on industrialized agriculture.
Which are ways in which heat energy leaves the surface of land masses? Select the three correct answers.(2 points)
evaporation
glacial motion
animal activity
conduction to air, which then rises in convection
plant growth
radiation of infrared energy
Evaporation
Conduction to air, which then rises in convection
Radiation of infrared energy
Explanation:
Evaporation is a method where the water changes from the liquid stage to the gas stage. The liquid molecules will collide with each other when they are changing their phase. During this change, there will be a little energy transformation happening from one molecule to another. Conduction is the process at which the electricity or the heat transmitted through the medium when the difference in temperature occurs. In this process, the material is not moving. Convection movement will happen in gases and liquids because of their tendency to get hotter. Less dense molecules will go up and the denser molecule will come down which eventually transfer heat. Radiation is the energy emission in form of subatomic particles, electromagnetic waves and other high energy particles.The correct statement regarding the ways in which the heat energy so produced leaves the surface of land masses are by the ways of evaporation, conduction to air later rising in convection and radiation of infrared energy.
So, the correct options that match with the statements quoted above are A, D and G. These are the ways in which heat energy can be converted.
Heat Energy. Heat energy can only be transferred from one form to another, and it can never be created or destroyed. Evaporation refers to conversion of water or liquid bodies to the gaseous state.Conduction to air can be referred with an example that Sodium metal starts catching fire, which is a form of heat at normal room temperature. Radiation in the form of infrared energy refers to the transfer of heat energy due to waves that are passed through an object.Hence, the correct options are A, D and G that the heat energy leaves the surface of land masses by the ways of evaporation, infrared radiation and conduction to air.
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1. According to Newton's first law, what happens to an object at rest if the net
force acting on the object is ON?
A. It remains at rest,
B. It begins moving at a constant speed,
C. It begins accelerating at a constant rate,
Answer:
According to Newton's first law, if the net force acting on the object that is at rest is 0N, it remains at rest.
Option: (A)
Explanation:
Out of the three laws of motion given by Sir Isaac Newton, the first law clearly states that if an object is at rest, it continues to be at rest unless and until it is acted upon by an imbalanced external force. In the given example, it is stated that the force acting on the object is 0N. Hence, it can be concluded that the object would continue to be at rest.In order to capture water to use for irrigation humans often
A.) Over fish a river system until a speices is ectinct
B.) Build home around a river
C.) Build dams
D.)Burn fossil Fuels
Answer:
c
Explanation:
--_--
If the Universe was born at the Big Bang, what existed before then?
b) Nothing, as time and space themselves began with the Big Bang.
This is the most widely accepted cosmological explanation of how the universe came into existence. The theory proposes that the universe began about 13.77 billion years ago from an extremely hot and dense state.
In Big Bang models, the universe started from a singularity, which is a point where density and temperature are thought to become infinite. This point marks the beginning of both space and time. Since a singularity can't be included as an event in spacetime, this implies that time itself started at the moment of the Big Bang.
Since time and space themselves originated from the Big Bang, the concept of 'before' loses its meaning. Our current models and understandings of physics indicate that there was no 'before' in any conventional sense because time did not exist.
Complete question-
If the Universe was born at the Big Bang, what is the prevailing theory about what existed before it?
a) A pre-existing universe that contracted into a singularity
b) Nothing, as time and space themselves began with the Big Bang
c) A vast ocean of matter and energy
d) A parallel universe that merged with our own
Question 3 of 5
2 Points
Which force is a contact force?
O
A. Leaves falling
B. A bicycle braking
C. A magnet pulling
D. Lightning forming
Answer:
a bicycle braking
Explanation:
got it right on my test
When did the build up of three oxygen create our ozone layer
Answer:
The build-up of three oxygen created our ozone layer around two billion years ago.
Explanation:
The ozone layer is a part of the stratosphere which is located right after the troposphere in the atmosphere of the Earth. The ozone gas is made up of the abundance of three oxygen molecules combining with the ultraviolet radiation emitted by the Sun. The development of the ozone layer happened around two billion years ago when the oxygen concentration levels on the planet began to rise slowly and gradually.From the standpoint of geography, your mental map is your:
Answer:
From the standpoint of geography, your mental map is your visualization of the spaces you come across.
Explanation:
In the sphere of behavioural geography, the phrase "mental map" stands for a person's viewpoint or perception of his/her area of interaction. Though it might seem like a subject matter that would be studied by social sciences fields, it is mostly studied by modern-day geographers. Mental maps are important as they provide people with crucial means of making sense of the world. They also help in storing and recalling information about the patterns of the Earth's physical and human characteristics. Example: Picturing one's neighbourhood, one can visualize where the roads go and where the houses are located including landmarks.
Answer:
Internal picture of the space that you know.
Please Give Brainliest
What is the difference between the cultures of Central Asia and the Caucasus region?
A.The effects of Soviet rule can still be seen in Central Asia; the Caucasus region has developed its own identity since the fall of the USSR .
B.The primary language in Central Asia is Armenian; the primary language in the Caucasus region is Russian.
C.Central Asia has been plagued by ethnic unrest; the Caucasus region has had little ethnic conflict.
D.The majority of people in Central Asia are Muslim; the majority in the Caucasus region are Christian.
D.The majority of people in Central Asia are Muslim; the majority in the Caucasus region are Christian.
Explanation:
Islam is the most widespread religion in the former Soviet Central Asian republics, Afghanistan, Sikyang and the peripheral western regions. Most Central Asian Muslims are Sunnis, although Shiites form a large majority in Azerbaijan, and there are considerable Shiite minorities in Afghanistan and Pakistan. Tibetan Buddhism is most widespread in Tibet, Mongolia and the southern Russian regions of Siberia where shamanism is also popular.On the other side, in Caucasus, especially in Georgia and Armenia Christianity is dominant religion.Learn more on Central Asia on
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Middle america is made up of mid latitudes and central america which is an blank linking north and south merica
Middle America is an isthmus that connects North and South America.
Explanation:
Middle America, or more commonly referred to as Central America, is actually part of North America. It represents the southernmost part of the continent, but is often put as a separate region because of its shape which makes it distinct from the rest of the continent. In fact, it can be said that Middle America is an isthmus that is connecting the two large continental masses of North America and South America.
This region's northern boundary is still disputable, and it varies from author to author, though in general it is borders of Belize and Guatemala that are taken as the northernmost parts. On the south it is Colombia's border, on the east it is the Caribbean Sea, while on the west is the Pacific Ocean. As a region, because of the multiple tectonic plate boundaries, Middle America is geologically highly active, with volcanic and earthquake activities being relatively common.
The countries that comprise this region are:
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2. What challenges come along with economic
growth in Mexico?
Answer: The challenges that come along with economic growth in Mexico are Government Corruption which harms jobs from small and medium-sized businesses.
What is the difference between the cultures of Central Asia and the Caucasus region?
PLEASE HELP!
A.The effects of Soviet rule can still be seen in Central Asia; the Caucasus region has developed its own identity since the fall of the USSR .
B.The primary language in Central Asia is Armenian; the primary language in the Caucasus region is Russian.
C.Central Asia has been plagued by ethnic unrest; the Caucasus region has had little ethnic conflict.
D.The majority of people in Central Asia are Muslim; the majority in the Caucasus region are Christian.
D.The majority of people in Central Asia are Muslim; the majority in the Caucasus region are Christian.
Explanation:
In Caucasus region there are three independent countries.Those are Azerbaijan, Armenia and Georgia.In Armenia and Georgia Christianity is a dominant religion, with more than 90 percent of believers.On the other side, in Central Asia Islam is a dominant religion, with not so much people who are followers of other religions.Learn more on Caucasus region on
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Answer:D it is
Explanation:
cuz
When two air masses with different temperatures or humidity levels meet, they do not immediately mix or blend. Instead a line or boundary forms between them. This boundary is called a...... Question 5 options: continental polar maritime polar maritime tropical front
When two air masses with different temperatures or humidity levels meet, they do not immediately mix or blend. Instead a line or boundary forms between them. This boundary is called a......front
Explanation:
Due to the different properties, especially temperatures. The less-dense air mass tends to rise while the denser tends to dive at the front causing turbulence. There are four main types of fronts;
Cold front – bring rainfall and thunderstormswarm front – associated with less intense weatherOccluded front – when a warm air mass is in between two cool air masses Stationary front - can be warm or cold but barely movesTwo air masses with different temperatures or humidity levels meet, they do not immediately mix or blend. Instead, a line or boundary forms between them. This boundary called a front.
What is Front?A front is a weather group that is the line separating two different types of air.One type of air usually concentrated than the other, with different temperatures and different levels of humidity. 7 – 12 Earth Science, Geography, Physical Geography.Due to the different properties, specially physical property. The less-dense air mass runs to rise while the heavier tends to dive at the front causing turbulence.The four principal types of fronts are:Cold front – bring rainfall and electric stormWarm front – linked with less big weatherOccluded front – when a warm air mass is in between two cool air groupsStationary front—can be warmed or cold, but just movesTherefore, Front means Two air masses with different temperatures levels meet, they do not immediately mix. Instead, a line or boundary forms between them.
Hence, the option [D] is correct.
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The Tigris and Euphrates Rivers both flow through Mesopotamia. Please select the best answer from the choices provided T F
Answer:
It is true that - the Tigris and Euphrates Rivers both flow through Mesopotamia.
Explanation:
Mesopotamia lies at the intersection of three tectonic plates. Both the rivers - The Tigris and Euphrates flow through this region, join to form the Shatt al-Arab and flow into the Persian Gulf. They have many small tributaries which originate from shallow freshwater lakes, swamps and marshes. Due to the rich soil of the rivers, this area developed and an urban civilization emerged in the Uruk period. The people who lived in this river valley created irrigation systems to save water. This was used by farmers to cultivate crops. Plus, the trade via both the rivers flourished which made Sumerian civilization one of the famous among the ancient river valley civilizations.
Answer: False
Explanation:because i just did it and i put true and it was wrong your welcome
Explain why the composition and liquid state of the outer core are necessary for creating Earth’s magnetic field?
The outer core's composition and liquid state are required for the creation of the Earth's magnetic field because convection currents in the liquid iron generate electric currents, which in turn form magnetic fields.
What is Earth’s?The term Earth refers to the planet of the solar system. The Earth is the only planet where life is possible for living things' in reason of gravitational force. The Earth's main elements are life, air, water, and land. The Earth's planet radius is 3,959 miles. The Earth is only for oxygen.
According to the Earth's magnetic field on the composition and liquid state of the outer core, the liquid iron in the outer core is an efficient electrical conductor and provides the electrical currents that drive the magnetic field. The seismic waves produced by earthquakes supply scientists with a variety of measurable evidence that supports the hypothesis of the Earth's outer core.
As a result, the significance of the Earth’s are the aforementioned.
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What caused many Arabs to move through the Middle East in the 600s CE?
Answer:
Religion is why many Arabs moved to the Middle East.
Explanation:
y = X + 4 Y = -2x -2
The answer is x = -2 and y = 2.
Explanation:
The first equation can be written as x - y = -4The second equation can be written as 2x + y = -2step 1 :
Solving by elimination method to find the value of x and y,
x - y = -4
2x + y = -2
3x = -6
step 2 :
x = -6/3 = -2
The value of x is x = -2
step 3 :
Substitute x = -2 in any of the given equations.
⇒ y = x + 4
⇒ y = -2 + 4
⇒ y = 2
What is one form from which a rock can change and one form into which it can change?
Metamorphic rocks form from heat and pressure changing the original or parent rock into a completely new rock.
The parent rock can be either sedimentary, igneous, or even another metamorphic rock. The word "metamorphic" comes from Greek and means "To Change Form"
One form that a rock can change from is igneous rock to sedimentary rock.
How can rocks change ?Igneous rocks are formed from molten rock that cools and solidifies. Sedimentary rocks are formed from the accumulation of sediments, which are pieces of rocks, minerals, and other materials.
Another form that a rock can change from is sedimentary rock to metamorphic rock. Metamorphic rocks are formed when sedimentary rocks are subjected to heat and pressure.
Igneous rock can also change to metamorphic rock without going through the sedimentary rock stage. This can happen when igneous rock is subjected to heat and pressure.
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