Answer:
A: x^2(x+2) / 3
Rainwater contains hydrogen of a heavy form called deuterium. The deuterium content of wood reflects the deuterium content of rainwater available to trees during their growth. Wood from trees that grew between 16,000 and 24,000 years ago in North America contains significantly more deuterium than wood from trees growing today. But water trapped in several North American caves that formed during that same early period contains significantly less deuterium than rainwater in North America today.Which of the following, if true, most helps to reconcile the two findings?(A) There is little deuterium in the North American caves than the deuterium in the water trapped there.(B) Exposure to water after a tree has died does not change the deuterium content of the wood.(C) Industrialization in North America over the past 100 years has altered the deuterium content of rain.(D) Trees draw on shallow groundwater from rain that falls during their growth, whereas water trapped in caves may have fallen as rainwater thousands of years before the caves formed.(E) Wood with high deuterium content is no more likely to remain preserved for long periods than is wood with a low deuterium content.
Answer:
(D) Trees draw on shallow groundwater from rain that falls during their growth, whereas water trapped in caves may have fallen as rainwater thousands of years before the caves formed
Explanation:
The above explanation, implies that water trapped in caves is not from the same period - 16,000 to 24,000 years ago. So, we cannot make appropriate comparisons about deuterium content.However, trees draw groundwater from rain, the heavy hydrogen components in the trees reflect the heavy hydrogen components of the rainwater. The heavy hydrogen component in the water is higher than the heavy hydrogen content in the trees now, the rainwater before 16000-24000 is higher than the current heavy rain.Obviously,option D discusses the difference between the two analog objects.
Which of the following best explains why considering opportunity costs is a
rational thing for consumers to do?
A. What you sacrifice for a decision is one of the non-monetary costs
of many choices.
B. All choices for something involve giving something else up.
C. Knowing how much one more unit will cost is important
information.
D. It is impossible to know the utility of something without
understanding its opportunity cost.
ANSWER IS A
What you sacrifice for a decision is one of the non-monetary costs of many choices explains why considering opportunity costs is a rational thing for consumers to do.
Explanation:
Costs of opportunity reflect the benefits that a person, investor or company loses in choosing one alternative over another. Although financial reports show no cost of opportunity, business owners should use it when they have many choices before them to make informed decisions. Since they are unnoticed by nature, it is easy to underestimate the costs of opportunity if one is not cautious. When selecting one project over another, knowing the possible lost opportunities foregone makes for better decision-making.Remember that, as a rule, temperatures decrease with altitude. If you were studying the effects of climate change on the geographic ranges of species living in the mountains and your climate records showed that mean temperatures were increasing, you would predict that species ranges would show a shift toward:
Answer: Higher elevations
Explanation:
plant species shift their ranges in altitude and latitude as a response to changing regional climate. For plant species to successful colonize a place they prefer a warmer temperatures and well-developed soils. Hence when the mean temperature range us high they tend to shift to a more favorable place(Higher elevations) for optimum growth and distribution.
The Earth's diameter at the poles is _____.
A)equal to its diameter at the equator
B)greater than its diameter at the equator
C)less than its diameter at the equator
The Earth's polar diameter is less than its equatorial diameter, making it an oblate spheroid with a flattened shape at the poles. The option (C) is correct.
Due to this bulge, the equatorial diameter is about 12,756 km (7926 miles), while the polar diameter is slightly less, about 12,714 km (7900 miles). The Earth's rotation causes this equatorial bulge, resulting in a larger diameter when measured across the equator than from pole to pole.
This asymmetry results in a flattened appearance at the poles and a bulging at the equator. This deviation from a perfect sphere is due to the planet's rotation, causing the centrifugal force to be stronger at the equator, pushing outward and flattening the shape.
Which of the following is false regarding soils?
A. They usually require centuries or millennia to form.
B. Soils rich in organic matter are usually dark in color.
C. Older soils usually have fewer horizons than younger soils.
D. Their properties are affected by the type of rock from which they form.
E. Their development is affected by climate and organisms.
Answer:
Option C, Older soils usually have fewer horizons than younger soils.
Explanation:
Older soils have well expressed soil horizons it is because old soil consists of distinctive layer of deposits including both organic and inorganic material which undergo stratification with time. The longer the time duration, the better stratified the soil is and hence more clear and distinctive are its horizons.
However in case of new soil, the horizon is not distinctive because of incomplete stratification.
hence, option C is correct
Which ocean current brings warm water to the southeastern tip of africa
The Agulhas current is the ocean current that brings warm air to the southeastern tip of Africa.
What is the Agulhas current?This is a warm ocean current that is known to move from the eastern coast of the southern part of Africa to the boundary of the south Indian ocean.
This current is knwoin to be a narrow, swift and very strong current that moves in the area. Hence the answer is Agulhas current.
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How does it explain the differences between seafloor and continental crust?
Seafloor crust is thinner and primarily composed of basaltic rock, while continental crust is thicker and made up of various rocks including granite. Seafloor crust is younger and constantly being created and destroyed, while continental crust is more stable and can be billions of years old.
The main difference between seafloor and continental crust lies in their composition and thickness. Seafloor crust, also known as oceanic crust, is primarily made up of basaltic rock and is thinner, averaging about 7 kilometers in thickness. On the other hand, continental crust is composed of a variety of rocks, including granite, and is much thicker, ranging from about 20 to 70 kilometers.
Another difference is their age. Seafloor crust is relatively young, with the oldest portions dating back to around 180 million years. In contrast, continental crust can be billions of years old, with some parts dating back over 4 billion years.
Additionally, the seafloor crust is constantly being created and destroyed through the process of seafloor spreading and subduction. This means that new crust forms at mid-ocean ridges, spreading outwards, while older crust is being consumed at subduction zones. Continental crust, on the other hand, is relatively stable and not subject to these processes as frequently.
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The seafloor (oceanic crust) and continental crust differ in their composition, density, and tectonic activity. The former is predominantly basalt, thinner, and can be subducted more easily than the latter, which is primarily made up of granite and thicker. Both interact and are recycled through tectonic activities such as subduction.
Explanation:The differences between the seafloor and the continental crust lie in their composition, density, and how they interact through tectonic activity. The seafloor, also known as the oceanic crust, covers 55% of Earth's surface, is around 6 kilometers thick, and is primarily composed of a volcanic rock called basalt, formed by the cooling of oceanic lava. Continental crust, on the other hand, covers 45% of the surface, measures 20 to 70 kilometers in thickness, and mainly consists of a type of silicate rock called granite.
Both crust types have densities of about 3 g/cm³, a figure significantly lower than the core or mantle of the Earth, but significantly higher than water (1 g/cm³). Moreover, Earth's crust and upper mantle divide into various tectonic plates, which move due to the convection in the mantle - a key process in plate tectonics.
When two plates collide, one is often forced beneath the other in a process called subduction, often creating features like ocean trenches. Typically, the thicker continental masses resist subduction, while the thinner oceanic plates can be thrust down into the upper mantle more readily. This activity is pivotal to the recycling of Earth's crust material and balance in the Earth's geology.
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Temperature inversion, a reversal of the normal behavior of temperature in the troposphere (the region of the atmosphere nearest the Earth's surface), in which a layer of cool air at the surface is overlain by a layer of warmer air. (Under normal conditions air temperature usually decreases with height.) Describe the relationship between a thermal inversion and pollution.
Final answer:
A temperature inversion in the troposphere creates a layer where cooler air below is trapped by warmer air above, leading to the accumulation of air pollutants near the ground. This situation can cause poor air quality and raise health concerns due to the concentration of pollution.
Explanation:
A temperature inversion occurs in the troposphere, which is the lowest layer of Earth's atmosphere. During a temperature inversion, the air closer to the surface is cooler than the air above it, which is the reverse of the typical temperature gradient in the troposphere where air temperature decreases with altitude. A result of this inversion is the trapping of air pollutants such as smog near the surface, leading to higher concentrations of pollutants and potential health hazards.
Normally, warmer air at the surface rises and disperses pollutants through convection. However, during an inversion, the layer of warmer air above acts as a "cap," preventing the cooler air containing pollutants from rising. This cap halts the mixing and dispersion of pollutants and keeps them near ground level, contributing to poor air quality and an increase in pollution-related problems.
1. Along a rocky coast, the sequence of landform development follows which sequence? (3 points) ←first last→ a) Rocky headland → Sea Arch → Sea Stack b) Sea Arch → Rocky Headland → Sea Stack c) Sea Stack → Rocky Headland → Sea Arch d) Sea Stack → Sea Arch → Rocky Headland
that is correct you did by carrying the to then divide
Answer:
d) Sea Stack → Sea Arch → Rocky Headland
Which elements of an op-ed are evident in the excerpt?
Select three options.
Answer:
C/D/E
Explanation:
The op-ed comes to a conclusion for the audience.
The op-ed includes first-person pronouns.
The op-ed attempts to persuade the audience.
Answer:
The simplified expression is -8x-3y+3z
The simplified expression is -4x-3y + 3z
-(-X) is equivalent to -x, so -5x-x- -6x.
Explanation:
Which description would be the best representation of this 1938 propaganda poster
The 1938 propaganda poster is a Soviet Union poster that aims to rally support for the war and emphasize the importance of Joseph Stalin and the Red Army. The portrayal of the enemy is comical and cartoon-like, conveying they are not menacing. This poster reflects the political climate of the Soviet Union.
Explanation:The 1938 propaganda poster described in the question is a Soviet Union poster that aims to rally the population around their leader, Joseph Stalin, and the Red Army. The poster depicts a young fighter holding a rifle and a banner with images of Lenin and Stalin, emphasizing their importance to the defense of the Socialist Motherland.
The portrayal of the enemy is slightly comical and cartoon-like, conveying the message that they are not menacing. This poster reflects the political climate of the Soviet Union during that time and the efforts to rally support for the war.
In what city is the oldest state house still in use?
Answer:
Annapolis, Maryland
Explanation:
4. _____ What best describes the density of the atmosphere? A. It increases as you increase in altitude B. It decreases as you increase in altitude C. It maintains a constant level throughout the atmosphere D. It shows fluctuations up and down as you move through the layers of the atmosphere E. It does not change
Answer: B.
Air pressure decreases as you increase in altitude.
Explanation:
Gravity pulls the gas molecules towards the center of the earth. This pull of gravity becomes stronger and closer to the center at sea level. Air becomes dense at sea level where the gravitational pull is stronger. Gases at the sea level are also compressed by the weight of the atmosphere above them. The force of the earth weighing down over a unit air is known as atmospheric pressure. At higher altitudes, the atmospheric pressure is lower and the air is less dense than at higher altitude.
Airspace is a layer (or layers) of gas that surrounds a planet and is kept in place by the planetary body's gravity. When the gravity is strong as well as the temperature and pressure are low, a planet preserves its environment.
The correct answer is B. Air pressure decreases as you increase in altitude.
The hydrogen atoms are drawn towards the earth's core by gravity. At water level, space-time pulls enormous and pushes you back to the center. At the water level, where the force of gravity is higher, the air gets denser. The gravity of the environment above them likewise compresses gases at sea level.
Pneumatic pressure is the amount of the earth pressing on a unit of air. The environmental concentration is lower and the air is less dense at high elevations than at lower altitudes.
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What would you find in the State Voter Information Guide? A. what you need to know to elect people to office B. a map of the state highways C. a copy of the state constitution D. what you need to know to drive a car
Answer:
A. what you need to know to elect people to office
Explanation:
Answer:A. What you need to know to elect people to office.
Explanation: A State voter information guide contains information about federal and statewide candidates that are running for office. It also contains information about statewide ballot measures.
The state voter guide is mailed prior to a statewide election and only during the period before the election is it mailed. It is important for the voters to know this information prior to the election.
The above photo shows a sandstorm in the Middle East. In which of the following areas would you be most likely to see this event?
A.
in arid and semiarid climate zones
B.
along tectonic fault lines
C.
near the coasts of the Mediterranean
D.
in tropical rainforest ecosystems
Answer:
A
Explanation:
They have low rainfall and deserts are more likely to form here
hope this helps!
Scientists believe that tectonic plates move due to convection currents which occur in the Earth’s _______________________ (layer of Earth)
Convection currents occur in the Earth’s mantle. Magma heats from the core, then rises through the mantle, and as it nears the crust, it cools and sinks back down, creating convection currents.
Answer:
Correct answer: B). Global climate is changing due to burning of fossil fuels and deforestation.
Forest holds a large amount of carbon, plants are known to absorb carbon dioxide from the atmosphere as they grow, that carbon dioxide is stored in plants in the form of carbon in plant's roots, leaves and in the soil. When trees are cut down, that stored carbon is released in the environment in the form of carbon dioxide, which accounts for approximately 18% of global greenhouse gas emission.
The burning of fossil fuel like coal, petroleum, oil, gas for the energy purpose is one of the major contributors for the rising level of carbon dioxide in the atmosphere, which leads to global warming and affect the climate.
Hence, the correct answer would be option B.
Explanation:
_____ an idea of innovation spreads by passing first among th most connected places or people. An urban hierarchy is usually involved, encouraging the leapfrogging of innovations over wide areas, with geographic distance a less important influence.
Answer:
Hierarchical Diffusion
Explanation:
Hierarchical Diffusion is the propagation of an concept to several other persons or places from individuals or nodes of authority or influence. This occurs when the invention or principle of diffusion extends in a leveled pattern from one position or individual of power or higher susceptibility to another.
HIERARCHICAL DIFFUSION is an idea of innovation spreads by passing first among th most connected places or people. An urban hierarchy is usually involved, encouraging the leapfrogging of innovations over wide areas, with geographic distance a less important influence.
With the support of a high ranking or influential person or organization, ideas are distributed. Over time the original concept can be updated because it is embraced by new people.
1. In what one area in China are coal, iron ore and oil all found close to one another.
Along the eastern coast of China are coal, iron ore and oil all found close to one another.
Where are natural resources found in China?The so-called Chinese coal belt in northwest China, which includes Inner Mongolia and Xinjiang, produces enormous amounts of natural gas and petroleum in addition to coal. Every year, China invests billions of Yuan in the geological discovery of resources, mainly oil and gas. The Chinese provinces with the highest concentrations of iron ore include Liaoning, Sichuan, Hebei, Inner Mongolia, and Shanxi. Gold and lead zinc got the largest funding for geological exploration among non-fossil resources, at around a billion yuan each year.
The world's largest reserve of rare earth is in China. Due to its use in several sectors, including the creation of LED displays, batteries, and luminance, rare earth has drawn increased attention from multinational companies. Export caps, however, were eliminated after China lost a WTO challenge brought by its trade partners on restrictions that worried international technology manufacturers.
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Name three forces that are constantly changing the earth
The three forces that are constantly changing the Earth are gravity, electromagnetism, and tidal forces.
Explanation:The three forces that are constantly changing the Earth are:
Gravity: Gravity is the force that pulls objects toward the center of the Earth. It is responsible for the weight of objects and determines their motion.Electromagnetism: Electromagnetic forces are responsible for many phenomena on Earth, such as the interaction between charged particles, the behavior of magnets, and the flow of electricity.Tidal forces: Tidal forces are caused by the gravitational pull of the Moon and the Sun on the Earth. These forces cause the rise and fall of ocean tides and create stresses on the Earth's crust.what keeps Earth in its orbit
Answer:
Newton realized that the reason the planets orbit the Sun is related to why objects fall to Earth when we drop them. The Sun's gravity pulls on the planets, just as Earth's gravity pulls down anything that is not held up by some other force and keeps you and me on the ground.
Explanation:
Answer:gravity
Explanation:
because of the magnetic pull
What are the pros and cons of accepting refugees?
Hurricane Ike made landfall in Texas in September of 2008, and went on to become the third costliest hurricane in U.S. history. At its peak, it had sustained winds of 233 kmh (145 mph). What category was Ike on the Saffir-Simpson scale at its peak?
Answer:
2
Explanation:
Explain factors that influence weather
Answer:
Although many factors combine to influence weather, the four main ones are solar radiation, the amount of which changes with Earth's tilt, orbital distance from the sun and latitude, temperature, air pressure and the abundance of water.
The Water Cycle
As the sun warms the surface of the Earth, water rises in the form of water vapor from lakes, rivers, oceans, plants, the ground, and other sources. This process is called evaporation.
Water vapor provides the moisture that forms clouds; it eventually returns to Earth in the form of precipitation, and the cycle continues.
Air Masses
When air hovers for a while over a surface area with uniform humidity and temperature, it takes on the characteristics of the area below. For example, an air mass over the tropical Atlantic Ocean would become warm and humid; an air mass over the winter snow and ice of northern Canada would become cold and dry. These massive volumes of air often cover thousands of miles and reach to the stratosphere. Overtime, mid-latitude cyclonic storms and global wind patterns move them to locations far from their source regions.
What happens when 2 air masses meet? The cold air pushes the hot air upwards, when going up the temperature drops and the air can't hold as much water when it is warm, so the cold water molecules condense and form clouds.
Jet Stream
Jet Stream
A jet stream is the name given to the area of air above where two air masses of different temperature converge e.g. a cold front meeting a warm front. The greater the temperature difference between the air masses, the greater the air pressure difference, and the faster the wind blows in the jet stream. This river of air has wind speeds which often exceed 100 mph, and sometimes over 200 mph. Jet streams more commonly form in the winter, when there is a greater difference between the temperature of the cold continental air masses and warm oceanic air masses.
This meandering current of high-speed wind, a jet stream is usually found around five to ten miles above Earth’s surface.
It generally flows west to east, often in a non-continuous wavy fashion, with cold, Equatorward dips and warm, Poleward bulges.
Weather Fronts
Weather Fronts
The transition zone between two air masses of different humidity and temperature is called a front. Along a cold front, cold air displaces warm air; along a warm front, warm air displaces cold air. When neither air mass displaces the other, a stationary front develops. Towering clouds and intense storms may form along cold fronts, while widespread clouds and rain, snow, sleet, or drizzle may accompany warm fronts.
Based on the physical features you see on this map, why do you think the timber and logging industry is located where it is?
Answer:
The forestry industry is located in the Amazon rainforest. It is located there because the rainforest provides the resources, like trees and waterways for transport, that are necessary for the industry to thrive.
Explanation:
This is the example
How big is the area of the Indian Subcontinent compared to the size of the US?
A.
It is about the same size as the US.
B.
It is about 1/2 the size of the US.
C.
It is much larger than the US.
D.
It is about 1/4 the size of the US.
Answer:
I belive it is B. it is about 1/2 the size of the US.
Explanation:
Answer:
b, About half of the size of the US
Explanation:
HELP MEE!!!
Analyze the map below and answer the question that follows.
A map of European rivers. Rivers are labeled 1, 2, 3, 4, and 5. 1 is in the United Kingdom. 2 is in Spain. 3 is in Germany. 4 is in Italy along the Swiss border. 5 extends from Romania to Germany.
Image by Dbachmann
The river that is labeled with the number 1 on the map above is the __________ River.
A.
Thames
B.
Tagus
C.
Rhine
D.
Po
Please select the best answer from the choices provided
A
B
C
D
Answer:
The answer i am choosing on my quiz is A. Danube . . . Thames
Explanation:
Answer:
a
Explanation:
In our Solar System the mass is primarily at the center, so the orbital speed of the planets decreases with distance. In a galaxy the orbital speed remains the same at large distances. What does this tell us about the distribution of mass in a galaxy?
Answer:
Check Explanation.
Explanation:
In order to be able to answer this question effectively and efficiently we have to consider the Newton's law of Universal gravitation which is given by the mathematical representation below;
Gravitational force, F = G (m1 × m2) / r^2.
Where G = Gravitational constant, m1 and m2 and the masses of body one and two respectively and r = distance.
So, we can deduce that the mass(in form of kinetic energy) increase at large distance and this makes the speed to reduce.
1. What is the name of the figure?
Rectangular Prism
Pentagonal Prism
Pentagonal Pyramid
Answer:
do you have a picture of it
The unique black and pink landforms of the ahaggar were formed by
Answer:
volcanoes
Explanation:
The ahaggard mountains are a highland region of the central Sahara and are found along the tropics of the cancer are approx 550,000 km square. Having an elevation of about 2,908 meters. Consists of an area of a large rocky desert the Mount Tahat is the highest peak. These mountains range typically experiences hot summer and cold winter being composed of the metamorphic rocks they have volcanic activity. Many of the volcanoes are extinct and erosional activity takes on a daily basis and this leaves more resistant rocks. The Ahaggar massif, Algeria is one of the major attractions due to the scenic landscape created by these relic mountains.A geologist looks at a map to determine which of two areas would experience more chemical weathering. Area 1 is on the coast of a country in South America, near the equator. The temperatures are hot, and the climate is humid with heavy rainfall. Area 2 is in the Midwestern United States. The temperature is relatively cool, and the climate does not include much humidity or rainfall.
Based on the given information, which area is most likely to have more chemical weathering?
please help!!
Answer:
Area 1
good luck
Answer:
It is area 1
Explanation: