Answer:
98.13 minutes
Explanation:
Given data:
Radius of the earth = 6800km.
Hence, Total radius of satellite orbit = 7048 km (6800+248) or 7048000m.
orbital period can be determine as
[tex]T = 2\pi \sqrt{\frac{r^3}{Gme}}[/tex]
where,
r = orbital radius,
m = mass of earth
and Ge = gravitational constant.
putting all value in above equation
[tex]T = 2\pi \sqrt{\frac{(7.048\times 10^6)^3}{(6.67\times 10^{-11}\times 5.97\times 10^24)}}[/tex]
[tex]= 6.28\times \frac{350.11}{39.82} \times 10^5[/tex]
[tex]= 58.88\times 10^2 [/tex]
= 5888 sec
= 98.13 minutes
Why is there is only a small difference in temperature between day and night, while the land experiences a much greater variation?
Answer:
The temperature in the day time is comparatively higher than the temperature at night time. It is because during the day time, there is the presence of the clouds and the atmosphere is comprised of water vapor, that gets heated up when sunlight falls on earth. So the temperature increases. Whereas, during the night time, there occurs no cloud and no sunlight that can warm up the atmosphere. So the heat energy that was trapped in the day time is easily released into the outer atmosphere (space), thereby decreasing the temperature.
Due to this reason, there occurs a certain amount of temperature difference between the day and night.
Answer:
The temperature in the day time is comparatively higher than the temperature at night time. It is because during the day time, there is the presence of the clouds and the atmosphere is comprised of water vapor, that gets heated up when sunlight falls on earth. So the temperature increases. Whereas, during the night time, there occurs no cloud and no sunlight that can warm up the atmosphere. So the heat energy that was trapped in the day time is easily released into the outer atmosphere (space), thereby decreasing the temperature.
Due to this reason, there occurs a certain amount of temperature difference between the day and night.
Question 10(Multiple Choice Worth 1 points) Which trophic level is most likely to contain the largest population of organisms within an ecosystem? First trophic level Second trophic level Third trophic level Fourth trophic level Fifth trophic level
Answer:
First trophic level
Explanation:
The energy distribution among the trophic levels varies greatly. In general, we can say that the lower the trophic level is, the more energy it has, and the higher the trophic level is, the less energy it has.
This same principle goes for the population size in the trophic levels as well. The lower the trophic level is, the higher the population is, the higher the trophic level, the lower the population is.
These two things are connected. The populations in the lower trophic levels are higher because there is much more energy, while the populations in the higher trophic levels have lower populations because the energy available is much smaller.
The first trophic level has the highest populations by far, and the reason behind it is that the organisms of this trophic level are actually able to produce their own food, thus energy.
The first trophic level, consisting of producers, contains the largest population of organisms in an ecosystem due to direct energy from photosynthesis and the energy loss at higher levels.
First trophic level: Contains producers that convert solar energy into chemical energy via photosynthesis. They support all other trophic levels.Second trophic level: Consists of primary consumers (herbivores) that eat producers.Third trophic level: Made up of secondary consumers (carnivores) that eat primary consumers.Fourth trophic level: Includes tertiary consumers (higher-level carnivores) that eat secondary consumers.Fifth trophic level: Contains quaternary consumers, although such levels are rare in nature.Generally, fewer organisms occupy higher trophic levels due to the decrease in available energy. Each trophic level loses approximately 90% of the energy from the previous level, so fewer organisms can be sustained. This is why producers at the first trophic level have the largest populations.
1. What do we mean when we say the Universe is expanding? Is the space between planets in our solar system, or the space between stars in our galaxy expanding, or is something else meant entirely? How does the concept of the expansion of the Universe give us its current age?
2. Carl Sagan famously said that we are "star stuff." In what sense is this true?
3. What is meant by observable Universe? What is the difference between the observable Universe and the entire Universe?
The Universe's expansion refers to the increasing distance between galaxies, supporting an estimate of its age being 13.8 billion years. 'We are star stuff' means life's elements came from stellar phenomena. The observable Universe is all that we can see from Earth, limited by the speed of light and the Universe's age.
Explanation:When we say the Universe is expanding, we mean that the distance between galaxies is increasing over time. This doesn't mean that the space between planets in our solar system or the space between stars in our galaxy is expanding, but rather the vast space between galaxies.
This concept helps us determine the age of the Universe as we can trace the expansion rate backwards in time to get an estimate, currently about 13.8 billion years.
Carl Sagan's quote, "we are star stuff," means that the elements that make up life on Earth originated from stellar phenomena. Stars, during their life and at death, produce and distribute many of the heavy elements found in nature, including the ones necessary for life.
The term observable Universe refers to the portion of the Universe that we can theoretically observe from Earth. It's bounded by the distance light has been able to travel since the Big Bang. The entire Universe is likely much larger, potentially infinite, but due to the speed of light and the age of the Universe, we can't observe it in its entirety.
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The Universe is expanding due to the space between galaxies enlarging, not the space within them. We are made of 'star stuff', as elements composing our bodies originated in stars. The observable Universe is parts of the Universe we can observe from Earth.
Explanation:1. When we say that the Universe is expanding, we're referring to the fact that the space between galaxies is getting larger. This does not, however, mean that the space within galaxies (like those between stars or planets) is expanding. Instead, galaxies are moving away from each other in space. This concept helps us estimate the age of the Universe, as we can measure the rate of expansion (the Hubble Constant) and calculate backwards to when everything would have been a single point - the Big Bang.
2. Carl Sagan's statement that we are 'star stuff' is in reference to the fact that many elements that make up our bodies, such as carbon and nitrogen, originated in stars. When stars die, sometimes through a supernova explosion, these elements are scattered through space and can be incorporated into other structures, such as planets and living organisms.
3. The observable Universe is the part of the Universe which we can technically observe from Earth, restricted by the speed of light. There may be parts of the Universe beyond this boundary which exists, but we can't perceive or measure them because light from there hasn't reached us yet. Therefore the observable Universe may be only a part of the entire Universe.
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Question 11 (1 point) Which of the following planets exhibit the characteristic "back and forth" motion relative to the stars? O A) Mars OB) Jupiter OC) Saturn OD) All of the above
Answer:
D) All of the above
Explanation:
The back and forth motion mentioned over here refers to the retrograde motion of the planets. Basically, the Earth is going around the Sun and othe planets are also going around the Sun.
When you observe planets regularly you will find that the stars are moving back and fourth in the same star field. This occurs due to planets' own elliptical orbit and different orbital speed of Earth and the respective planets.
Answer: all of the above
Explanation: got it right on the quiz
If all the energy from a 103 W light bulb is emitted at 590.0 nm, what is the energy of each photon in Joule? Planck’s constant is 6.6 x 10-34 J*s and the speed of light is 3.0 x 108 m/s.
Answer:
Energy of each photon is given by [tex]0.0335\times 10^{-17}j[/tex]
Explanation:
We have given wavelength of light [tex]\lambda =590nm=590\times 10^{-9}m[/tex]
Speed of light [tex]c=3\times 10^8m/sec[/tex]
Plank's constant [tex]h=6.6\times 10^{-34}j-s[/tex]
We know that energy of photon is given by [tex]E=h\nu =\frac{hc}{\lambda }[/tex]
So energy is given by
[tex]E=h\nu =\frac{hc}{\lambda }=\frac{6.6\times 10^{-34}\times 3\times 10^8}{590\times 10^{-9}}=0.0335\times 10^{-17}j[/tex]
The population growth rate is a metric of how quickly a population increases in size. It is dependent upon the population's death and birth rates Human population growth rates fluctuate over time. For example, after the Industrial Revolution in the 18th century in Europe and North America, the human population growth rate soared because better health care and nutrition led to lower mortality rates. In the past few decades, human population growth has significantly decreased in some areas of the world. Despite a trend of lower birth rates in many regions during the past century, the global human population, which scientists estimated to be 7.5 billion in 2017, is increasing at a growth rate of just over 1%. the projected global human population in If Earth's population continues to grow at the current rate of 1.13%, what the year 2100? 25 billion 11 billion more than 30 billion 8-9 billion
Answer:
11 billion
Explanation:
The global population is constantly on the rise. There are significant demographic differences around the world, and i general they can be taken regionally.
Europe, the Americas, and East Asia tend to have low birthrates and low mortality rates. This leads to aging populations, and gradually the populations will start to stagnate and even decrease. On the other side, Africa, South Asia, Southeast Asia, the Middle East, are regions that have very high birthrates, and even though the mortality rates are much higher than the previously mentioned regions, they still manage to have big increase in their population. In a way, this disproportion is actually balancing the global population, so its rise is not as dramatic as in the past. It is expected that the population will continue to rise, but that the rise will constantly go down. The estimates are that by the year of 2100, the world will have a population of just above 11 billion people, 11.2 billion to be more precise.Answer:
I think the answer is, 11 billion
Explanation:
Hope it helps!
1. What happens in a ocean-continental collision?
a. montains form
b. continental plate subducts
c. new crust is formed
d. oceanic plate subducts
Answer:
A. Mountain forms
Explanation:
Its due to the continental plate is lighter than the oceanic plate the pale get subducted due to the slab push and slab pull effects. The continental plate further reaching the depth burns due to the pressure and intense temperature also this causing the melting of the rocks and leading to the formation of volcanoes and mountain chains of all sizes. Mountain forms and is composed of lava and basaltic matter from below. The collision of the plate leads to the formation of faults along the boundaries this led to the formation of the many large mountains on earth. The Himalayas are thereby known as the young fold mountains.define pharmacokinetics. Name the four processes in pharmacokinetics and give an explanation of each.
Answer:
Pharmacokinetics is the analysis of how the body copes with absorption, distribution, metabolism & excretion of drugs under examination.
The four process of pharmacokinetics are absorption, distribution, metabolism and elimination.
Explanation:
Pharmacokinetics is the analysis of how the body copes with absorption, distribution, metabolism & excretion of drugs under examination. The impacts and length of the drug's action are also considered.
The four process of pharmacokinetics are absorption, distribution, metabolism and elimination.
1) Absorption - Absorption is the motion of a drug into the blood from its administration site. Many drugs are absorbed through passive absorption, but certain drugs require transportation mediated by the carrier.
2) Distribution - Distribution is the body wide motion of drugs
3) Metabolism - It is the method of transforming a drug throughout the body and make it much more hydrophilic in order for the kidneys to secrete it from the body.
4) Elimination - Excretion is the elimination from the body of the substance. Several drugs are either excreted unchanged or emit as urine or some other form.
Answer:
Answered
Explanation:
Pharmacokinetics is the branch of pharmacy which deals with the action of the body on the drug once it is administered in the body.
There are four process are followed when a drug is administered inside a body. These are absorption, distribution, metabolism and elimination or excretion.
Absorption is the movement of drug from its site of administration into the blood. Most drugs are absorbed by passive absorption but drugs need carrier mediated transport.
Distribution is the movement of drug through out body. Determined by the blood flow into tissues and cells.
Metabolism is the transformation of blood within the body to make it more hydrophilic so that it can be easily excreted out of the system.
Excretion is the removal of substances from the body. Some drugs are either excreted out unchanged and some are excreted out as metabolites.
Which is accurate about the Earth? Group of answer choices The lithosphere is a layer containing both the uppermost part of the mantle and the crust, where flowing is more common than breaking. The lithosphere is the soft part of the mantle below the asthenosphere. The asthenosphere is a layer containing both the uppermost part of the mantle and the crust, where flowing is more common than breaking. The lithosphere is a layer containing both the uppermost part of the mantle and the crust, where breaking is more common than flowing. The lithosphere is the very center of the Earth. The lithosphere is the soft part of the mantle below the asthenosphere. The asthenosphere is a layer containing both the hottest part of the mantle and the crust, where flowing is more common than breaking.
Answer:
Option (4)
Explanation:
The lithosphere represents the outermost hard layer of the earth. This layer provides all the necessary elements for life to exist and these are available to all the living creatures in the form of soils. The lithosphere is comprised of the crust and the upper part of the mantle. The lithospheric crust on earth is divided into 2 types, namely the continental crust and the oceanic crust. These crusts move over the less dense layer of the asthenosphere, which covers a small portion of the upper portion of the mantle. This motion of plates is due to the convection current that generates in the mantle.
The rocks in the lithosphere are hard and it breaks during deformation.
Thus, the correct answer is option (4).
Asesthnosphere consist of the uppermost part of the mantel.
What forms the upper layer of planet earth ?
Earth is a planet in the solar system that supports life and has layered the earth is a dominant planet that is capable of supporting life. The earth is thus the rocky planet and is layers that support the earth are called the crust, core, and mantel.
As the asthenosphere is a sphere that divides the earth from the crust and core the layer has various properties.
The asthenosphere is a major layer and consists of more than 60% of the earth's mass. This layer holds the crust as crust freely floats on this layer.
Thus the answer is B.
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Wind power has a cubic dependency on wind speed. How much power will a wind-powered turbine generate for a wind speed of 8 m/s, if it generates 100 kW when the wind speed is 2m/s ?
Answer:
Power generated by wind turbine at 8 m/sec will be 6400 KW
Explanation:
We have given at 2 m/sec power generated by turbine = 100 KW
We know that foe a wind turbine power [tex]P\propto\ v^3[/tex] here P is power and v is velocity of wind
So [tex]P=kv^3[/tex], here k is constant
So [tex]100\times 1000=k\times 2^3[/tex]
k = 12500
Now we have to calculate power at 8 m/sec
So power [tex]P=kv^3=12500\times 8^3=6400\times 10^3W=6400KW[/tex]
So power generated by wind turbine at 8 m/sec will be 6400 KW
Question 2 2 pts The _is a natural process that warms the Earth's surface and is the primary reason for global warming. Ocean acidification O Photosynthesis None of the options Greenhouse effect
Answer:
Greenhouse effect
Explanation:
Greenhouse effect -
The process by which the temperature of a planet increases above the normal temperature range .
In increase in the concentration of the green house gases are responsible for the green house effect .
The natural process of the greenhouse effect is crucial for the survival of living beings on the planet Earth , as without green house effect , the planet will freeze and will not support living organisms like Human beings , animal and plants .
But due to an increase in the green house effect , the temperature of the planet will increase more than the normal range and will lead to Global warming .
Jillian is concerned about the number of aluminum cans she throws away each week. Suggest a reduce, a reuse, and a recycle strategy to help Jillian decrease the amount of aluminum waste she produces. Of the three strategies you suggest, which do you think will most decrease Jillian’s aluminum waste? Explain your answer. (7 points)
Answer:
She needs to waste awareness.
Explanation:
She needs to start a special program and put recycling baskets around the neighborhood. She can also go around house to house and tell people about the consequences. She can use the school and create a club to clean around neighborhoods looking for recycled items. That way she can raise awareness and earn service hours. She can put brochures around with advices and tips.
The First Civilizations
Instructions:
1. Locate the following towns, areas, seas and rivers on a world map. (15 points) Submit your map in class to deliver with the respective identified places.
* Egypt * Nile River * Mesopotamia * Tigris River * Palestine * Euphrates River * Phenicia * Jordan River
* Mediterranean Sea * Red Sea * Sinai Peninsula * Athens * Yellow River, China
* Asia Minor * Arabian Peninsula
2. Why did the ancient civilizations settle near the rivers?
Answer:
Map is given below.
Explanation:
Egypt is a country that is located between northeastern Africa and the middle east, located near the Nile River. Mesopotamia is situated in western Asia and the Tigris–Euphrates river system. Jordan River is 250 km long passes through the Middle East that flows roughly from the north to south through the Galilee and Dead Sea. Reason for the settlement of ancient civilization around the river valleys is due to these fertile lands helped the civilizations to grow in large numbers and also provided the mineral-rich soil for the domestication of plants and cattle from where the phase of agriculture began. Also, the fertile rivers were considered as the breeding ground for the fish populations and hence provided immediate food for the civilizations.What very successful Miocene period primate is most likely ancestral to the living apes? (Hint: this genus had at least four distinct species).
Proconsul
Ramapithecus
Aegyptopithecus
Zinjanthropus
Sivapithecus
Answer:
Proconsul
Explanation:
Proconsul is an extinct genus of primate. It is widely considered to be the ancestor of all the primates that we know at present, such as the chimpanzee, gorilla, gibbons, orangutans, and of course us, the humans.
This genus of primate had mixed characteristics, something like a cross between the monkeys of the Old World and the primates. Simply it can be said that the four species of this genus were transitional species from monkeys toward primates.
The four known species of Proconsul all lived in Africa, and the main difference between them was the size. The period in which the Proconsul existed was the Miocene, between 25 and 23 million years ago.
The Hardy-Weinberg law describes the characteristics of a genetic population under ideal circumstances. This principle states that gene frequencies in a population, under ideal conditions, would:
a. remain stable over time
b. display directional selection
c. develop zygomatic plasticity
Answer:
a. remain stable over time
Explanation:
Hardy-Weinberg law -
It states that , if there is no evolutionary influence like the mate choice , population bottleneck , sexual mutation , etc and the conditions are ideal in a population , then the gene and allele frequencies in that particular population remain constant from generation to generation .
Hence , from the options given in the question , the correct answer is ( a ) remain stable over time .
Consider the natural resources that transcend the borders; e.g. air, water and wildlife. Who do you think should provide and implement the legislature surrounding these important issues?
Answer:
The United Nations
Explanation:
The UN is a global assembly of different countries in the world. To a significant extent, the UN hosts the largest membership of nations in the world today.
The proper use of resources without borders should be under the auspices of the group of nations, UN. Here, nations can easily collaborate on the best way to utilize these border-less resources.
At rst hydrogen has a spectral line at 165 nm. If the line is observed at 170 nm for the star Proxima, how fast is Proxima moving in km/s
Answer:
9090.90 Km/s
Explanation:
Given:
hydrogen has a spectral line at = 165 nm
Line is observed at = 170 nm
Now, from the Hubble's law
[tex]v=\frac{\Delta\lambda}{\lambda}\times\ C[/tex]
Where,
v is the velocity
Δλ = Change in wavelength = 170 - 165 = 5 nm
λ = Actual wavelength
C is the speed of the light
on substituting the respective values, we get
[tex]v=\frac{5}{165}\times3times10^8[/tex]
or
v = 90.90909 × 10⁵ m/s
or
v = 9090.90 Km/s
Why do you think that Demi Lovato developed mental illness? How does she bring together multiple factors in her recovery? How do you think that a star being this open about recovery influences children?
Answer and Explanation:
Demi Lovato created psychological maladjustment due to overdose of medications or illicit drug use.
Lovato opened about their battles with dependence and psychological well-being and it has shone light on it in different constructive ways.It is something big names once in a while do.the rundown of lovato shared is since quite a while ago: depression,addiction,disordered eating and bipolar disorder.She said ," If you are relieved it can want to mortify inability to concede that you need more help.People sharing accounts of sickness that end in with a joyfully ever-afters are frequently called bold for conceding their shortcoming and experience ,and obviously they are,but as a model of goals they can be obliterating simultaneously for others when a disease reappears or relapses,and even brief sentiments of disgrace or fears of looking for further help.
Which of the following gases is mainly from incomplete combustion of fossil fuel?
Question 41 options:
CO
SO2
CO2
NO
Answer:
Option (1)
Explanation:
The incomplete combustion of fossil generally occurs when there is less amount of air or oxygen. This incomplete combustion leads to the production of carbon monoxide and carbon along with water. It does not release any carbon dioxide.
The reaction that represents an incomplete combustion is-
Hydrocarbon (fossil) + oxygen (O₂) → Carbon Monoxide (CO) + carbon (C) + water (H₂O) .
This reaction releases this Carbon monoxide which is a very poisonous gas. This gases are trapped in the lungs and it creates difficulty for the blood to carry oxygen. This is the reason why the complete combustion of fossil is more preferred compared to the incomplete combustion.
Hence, the correct answer is option (1).
Answer:
CO (carbon Dioxide)
Explanation:
Fossil fuels such as coal and petroleum products contain carbon (C) and hydrogen (H). When they burn completely, carbon and hydrogen react with oxygen gas to produce carbon dioxide (CO₂) and water (H₂O).
But in incomplete burning, a portion of carbon that contained in fossil fuel is not completely oxidized. As a result carbon monoxide (CO) is produced.
The carbon monoxide is a poisonous gas that affects health. The maximum limit of carbon monoxide production allowed in flue products is 400 ppm (parts per million) and the gas flame produces 0 and 50 ppm of carbon monoxide.
Incomplete combustion results in the production of above 7,000 ppm of carbon monoxide. Such a high concentration of carbon monoxide is a health risk and can be fatal.
Question 14(Multiple Choice Worth 3 points) Crust is recycled at hot spots. O mid-ocean ridges. trenches. rifts. transform faults.
Answer:
trenches
Explanation:
Crust recycling is the earth process by which surface matter from the land sphere is recycled into the mantle by the process of subduction or delamination. The crustal signs in mantle-derived rocks are thus a proof of the recycling. Most of this process happens through the mid-oceanic ridges. The development of whole mantle convection components and layered by mantle convection proponents. Evidence is suggested through the Seismic tomography and Stable isotopes that help in understanding the different layers on the earth and keeps track of the movements within the earth's crust. Dome group of researchers can find out that 5 to 10 % of the upper mantle is composed of recycled crustal matter.Why are felsic lava flows so much more viscous than mafic ones?
Answer:
Magma are the hot molten materials that rises up towards the surface due to the increasing force from the depth. These magma when comes out to the surface then they are considered as lava.
The felsic lava are those in which the amount of silica and aluminium is very high. Due to this high silica content, the viscosity is high. The amount of silica present in magma or lava is directly proportional to the viscosity of magma or lava. The felsic lava due to its high viscosity flows sluggishly.
Whereas, the basic lava are those in which the silica content is significantly less. Iron (Fe) and Magnesium (Mg) is mostly present in this type of lava. As a result of which it flows easily without any difficulty.
This is the reason why felsic magma (lava) are more viscous compared to the mafic magma (lava).
Felsic lava flows are more viscous due to their higher silica content, which increases the magma's resistance to flow. This higher viscosity can lead to explosive eruptions as gases become trapped within the magma. Mafic lavas, in contrast, with lower silica content have lower viscosity, which results in smoother flows and gentler, effusive eruptions.
Explanation:Felsic lava flows are more viscous than mafic ones primarily due to the higher silica content in felsic magmas. Viscosity is a critical factor that determines how magma behaves and is also influenced by temperature, the volume of dissolved gases, and the specific minerals present within the magma. Felsic magmas, often associated with minerals like quartz and orthoclase feldspar, are higher in silica and this increased silica content leads to an increase in the magma's resistance to flow, which is described as a higher viscosity. Mafic magmas, consisting of minerals like olivine and pyroxene, are lower in silica and have a lower viscosity, which allows them to flow more smoothly to the surface.
The viscous nature of felsic lavas causes them to flow less easily, which can result in the buildup of pressure in a magma chamber as gases become trapped. This contributes to the potential for more explosive volcanic eruptions when felsic magma does reach the surface. On the other hand, the low-viscosity mafic lavas are associated with gentler, effusive eruptions, which allow for the fluid lava to spread across the surface forming various types of lava flows such as pahoehoe and aa.
Explain how political, economic, and religious forces can affect the diffusion of language.
Answer by using a minimum of 125 words.
Answer:
Explained as below
Explanation:
The political, economic, religious and other forces affect the diffusion of languages in any region as its due to the political features of the territory that the boundaries of one country that touch that of the another and this shows its location in relation to the other countries in the world. Ex of political boundaries. Economically any country on earth has its economy and which may or may not be dependent on the resource of the other nations is in direct relation to the interaction of one nation's language with those of the others. The lifestyles and ways of interactions have indirect communications on the languages in the country. Ex of trade flows. Social or religious factors have a direct bearing upon the linguistic diversity of the region as the so-called world is divided itself into 6 main religions like Christian, Muslims, Hindus, Buddhist, Jain, and jews and there are certain subclasses found within them thus, repeated Interaction of these elements leads to diffusion.Define Elment Atom and Compound in paragraph form
Atoms are extremely small particles that constitute a specific type of chemical element and that gives elements their property like color, density, melting point, boiling point, and thermal and electrical conductivity. Elements are substances made from one type of atom that cannot be separated into simpler substances, like sodium, hydrogen, oxygen, and chloride. Lastly, Compounds are substances consisting of two or more elements, whose atoms are chemically joined together; water and salt are examples of compounds because the first is made of hydrogen and oxygen, while the latter is made up of sodium and chloride.
Question 1 If the energy returned from a resource is 20 MW and the energy invested for the same is 5 MW, the EROI of the process will be O 100 5 4 O 0.25
Answer:
4
Explanation:
The formula for calculation of EROI is :
[tex]EROI=\frac {\text{Energy delivered}}{\text{Energy required to deliver energy}}[/tex]
Thus,
Energy returned = 20 MW
Energy invested = 5 MW
So,
[tex]EROI=\frac {\text{Energy delivered}}{\text{Energy required to deliver energy}}=\frac {20\ MW}{5\ MW}=4[/tex]
The EROI of the process will be 4.
1)What is the theory of plate tectonics? 2)What is the evidence for the plate tectonics theory? 3)There are seven major crustal plates (name and briefly describe) that make up the earth’s surface. Do they include just continents? 4)What are the major driving forces for earth’s plate motion? 5)Plate tectonics is described as a unifying theory. What major geologic features are explained? 6)Describe the "scientific method". (How do the terms "hypothesis", "theory" and "law" relate to each other?)
1. The theory of plate tectonics is the theory that suggests that there are tectonic plates and they are moving on surface of our planet.
According to this theory, the forces from the mantle layer create a very big pressure on the crust, and they managed to crack it in numerous pieces. It doesn't stop there though, as those same forces actually are moving the tectonic plates in certain direction. This results in different types of interaction between the plates, as they can move away from each other, slide past each other, or collide with each other.
This is what gives the basis of the formation of the majority of the physical features on the surface on our planet, but it can also influence on destroying physical features.
2. There are several evidence that point to the plate tectonics theory and that it is in fact a real process that is happening on our planet constantly.
The puzzle like matching of certain parts of the continents, especially the eastern coast of South America and the Western coast of Africa, is one evidence, as they look like they have been together but then broken apart.
The mid-ocean ridges provide evidence about the formation of new crust. They also show how the crust is pushed sideways, in the manner that the youngest crust is at the mid-ocean ridge itself, while the bigger the distance from it, the older the crust is.
The fossil records are another evidence. There are lot of fossils of the same species that have been found in continents that are not connected in the present. This is simply not possible, as even if the same species is put in another location, it will gradually evolve new characteristics because of the environment. This has been the case with fossils of the same species being found on Antarctica, South America, and Africa, pointing that once these three continents were part of one larger land mass.
3. There are seven major tectonic plates on Earth, but also several smaller ones. Most of the major plates are continental: African, Eurasian, North American, South American, Indo-Australian, and Antarctic plates. Only one of the major plates is actually oceanic, and that is the Pacific plate.
Not to be mistaken though, big portions of the continental tectonic plates are actually under water, as they are not all above it and creating enormous land mass, just that the crust doesn't have the oceanic plate composition.
The Eurasian plate is the largest of the continental plates, stretching from the eastern side of Iceland to the eastern part of Siberia.
The North American plate is stretching from the western side of Iceland to the eastern part of Siberia.
The African plate is actually in a process of divergence, as it splits into two separate plates gradually, the Somali and Nubian plates.
The Indo-Australian plate has been formed by the merging of the Indian and Australian plates, though India is part of Asia and it seems the other way.
The South American plate is gradually moving toward west an it will most probably isolate itself from North America, while the Antarctic plate is moving toward the lower latitudes, so in millions of years in the future it will probably not be frozen anymore. T
he Pacific plate is by far the largest of any other oceanic plate, but it is decreasing in size from all sides, as it subducts below continental plates on all sides.
4. The tectonic plates need to experience enormous amount of force upon them in order to be able to move. This enormous amount of force comes from below them, from the mantle layer. These forces are known as convection currents.
The convection currents are circular movements of material in the mantle layer, between its upper and lower parts. This happens because of the difference in density and temperature between the material in its upper and lower part.
The material that is in the upper part is cooler and it has bigger density, while the material in the lower part has higher temperature and lower density. The material from the upper part sinks gradually toward the bottom as it is heavier, while the material from the bottom moves upward as it is lighter. Once the material from the top that came to the bottom becomes hotter and less dense, it moves in the opposite direction, thus upward, and the process constantly continues. The movement upwards creates enormous pressure on the crust, resulting in cracking it, as well as moving slowly on the surface of our planet.
Question 12 (1 point) Over the course of the year, the Sun's declination ... A) decreases B) increases and decreases C) increases D) stays the same
Answer:
B) increases and decreases
Explanation:
Sun's declination is the angular distance from north to south of the celestial equator. The delineations of the sun change from 23.5 degrees North to 23.5 degrees South and back again during a year. As the seasons change the time the sun stays at the earth atmosphere also changes from day to night like at the time of Solstice in winter and summer. The dates of these solstices change from time to time according to the rotation of the earth. As te places on the earth latitude have delineated over the period that has caused the coordinates to change continuously. There is an increase and then decrease of this definition from east to west in some latitudes and west to est in others related to the north and south pole alignments of the earth.The Sun's declination changes throughout the year, it increases and decreases due to the tilt of the Earth's axis and its orbit around the Sun, affecting seasons and daylight length.
Explanation:The question refers to the pattern of changes in the Sun's declination throughout the year. The Sun's declination, which is the angle between the rays of the sun and the plane of the Earth's equator, increases and decreases over the course of a year. This is due to the tilt of the Earth's axis and its orbit around the Sun, causing the Sun to appear higher in the sky during summer and lower during winter in any hemisphere. This variation is what leads to the changing seasons and the difference in the length of daylight throughout the year.
In which aspects do the nanotechnology improves enhanced oil recovery(EOR)?
Answer:
Nanotechnology helps to improve viscous fingering and the nano-particles can transmit through nanopores of sandstone which helps to increase the recovery by decreasing the surface tension between oil and water. The pore spaces are very fine so water molecules cannot penetrate through all of them in order to push the oil. This is why the nano-particles such as iron (Fe) and Silicon (Si) are used with distilled water. These particles can easily move through the interconnected pores and thereby pushes the oil to move out of it. It is a widely accepted concept in Enhanced Oil Recovery (EOR).
Final answer:
Nanotechnology enhances enhanced oil recovery (EOR) by improving oil's properties for easier extraction, increasing porosity and permeability of reservoir rocks, and targeting specific reservoir zones more efficiently. This technological advancement supports more sustainable oil extraction techniques, such as carbon dioxide injection, and helps to extend the life of oil fields.
Explanation:
Nanotechnology significantly improves aspects of enhanced oil recovery (EOR) through innovative methods that increase the efficiency and effectiveness of oil extraction. Primary recovery methods only extract about 30% of crude oil, while EOR techniques, aided by nanotechnology, can significantly increase this percentage. One notable application of nanotechnology in EOR is the injection of nanoparticles to change the properties of oil, making it easier to extract from rock pores. These nanoparticles can alter the oil's viscosity and surface tension, facilitating its flow towards the production wells. Furthermore, nanotechnology applications in EOR include improving porosity and permeability of the reservoir rocks, targeting specific oil reservoir zones for increased precision in oil extraction, and enhancing the recovery rates from previously uneconomical or depleted fields. This technological advancement aligns with the sustainable technique of carbon dioxide injection for removing more oil, thereby not only extending the life of oil fields but also improving the control of unintended emissions associated with fossil fuel extraction. The integration of nanotechnology in EOR presents a promising avenue for accessing the remaining oil in reservoirs, which current technology accesses only about one-third of.
A.7.2. Apply (APPENDIX A pp. 878).
A1. Convert the values on the left to the units at right, using a table of conversions. a. 50 miles =? km b. 15 knots = ? m s–1 c. 30 lb in–2 =? kPa d. 5000 kW =? horsepower e. 150 lbMass =? kg f. 150 lbForce =? N g. 12 ft = ? m h. 50 km h–1 = ? m s–1
Answer:
a) 80 km
b) 7.65 m/s
c) 206.7 kPa
d) 6700 horsepower
e) 67.3 kg
f) 666 N
g) 3.6 m
h) 13.88 m/s
Explanation:
a. we know that 1 mile = 1.6 km
[tex]50 miles = (50 \times 1.6) km = 80 km[/tex]
b. we know that 1 knot = 0.51 m/s
[tex]15 knots = (15 \times 0.51) m/s = 7.65 m/s[/tex]
c. we knwo that 1 lb/inch^2 = 6.89 kPa
[tex]30 lb/inch2 = (30 \times 6.89) kPa = 206.7 kPa
[/tex]
d. we know that 1 kilowatt = 1.34 horsepower
[tex]5000 kW = (5000 \times 1.34) horsepower = 6700 horsepower[/tex]
e. we know that 1 lbMass = 0.45 kg
[tex]150 lb = (150 \times 0.45) kg = 67.3 kg[/tex]
f. we know that 1 lbForce = 4.44 N
[tex]150 lbf = (150 \times 4.44) N = 666 N[/tex]
g. we know that 1 ft = 0.3 m
[tex]12 ft = (12\times 0.3) m = 3.6 m[/tex]
h. we know that 1 km/h = 0.27 m/s
[tex]50 km/h = (50\times 0.27) m/s = 13.88 m/s[/tex]
Which one is the coldest layer in the atmosphere?
Question 56 options:
Troposphere
Mesosphere
Thermosphere
Stratosphere
The correct answer is B. Mesosphere.
Explanation
The mesosphere is the third layer of the Earth's atmosphere, located above the stratosphere and below the thermosphere. Some of its main features are its thickness of 35 km, its temperature, because the mesosphere becomes colder as the distance from the Earth increases, that is, as the altitude increases. In warmer points, its temperature can reach -5 degrees Celsius, but at other altitudes the temperature can drop to -140 degrees Celsius, so it is considered the coldest of all layers.
On the other hand, the mesosphere is a protective layer for the planet, since it destroys most meteors and asteroids before they can reach the Earth's surface. So, the correct answer is B. Mesosphere.
distance east or west of the prime meridian is measured in degrees of?
Answer:
Longitude measure the distance east to west of the prime meridian that runs through greenwich england. Degrees are denoted by the greek word lamba.
Explanation:
Longitude gives us an angular measurement from 0 to 180 degrees. Subdivided into 60 minutes and 60 seconds. As longitude is singular at the poles. Earth's tectonic plates move relative to one another in different directions at the speed of 50 to 100mm per year so the movement sin tectonic plates influence the latitudinal rotation which changes from year to year. These vertical lines define the places on the earth with their approximate sea level surfaces. The longitudinal belt is the equator at the zero degrees largest longitude on earth.