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Which of the following best summarizes the law of conservation of mass? a. Matter can be changed but not created or destroyed. b. Matter can be destroyed during a chemical reaction. C. Matter that gains mass during a chemical reaction is evidence that matter can be created.



Which of the following best summarizes the law of conservation of mass? a. Matter can be changed but not created or destroyed. b. Matter can be destroyed during a chemical reaction. C. Matter that gains mass during a chemical reaction is evidence that matter can be created.

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Which of the following was an early realization that gave rise to Darwin’s theory of natural selection? A. The earth is younger than previously thought. B. The earth and its organisms have changed through time. C. Organisms do not appear to be closely related. D. Most organisms share the same habitat.


Your answer is B. The earth and its organisms have changed through time

it is not:

A) because Darwin thought the world was much older than was previously thought

C) because Darwin found that many had similar charecteristics

D) NOT EVERY ORGANISM IS IN THE SAME PLACE, CLIMATE, etc

hope this helps 😀

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. 13. How can the reader tell that Goodman Brown has been changed by his experience in the woods, based on the following description: “Turning the corner by the meeting-house, he spied the head of Faith, with the pink ribbons, gazing anxiously forth, and bursting into such joy at the sight of him that she skipped along the street and almost kissed her husband before the whole village. But Goodman Brown looked sternly and sadly into her face, and passed on without a greeting.”


Answered by answersmine AT 22/10/2019 – 03:46 AM

The reader can tell that Goodman Brown has been changed by his experience in the woods because when he went home and just as his wife kissed him, he just looked sad and just walked away without kissing or greeting his wife back. It is very opposite to what he usually do when he comes home.

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If greenhouse gases in the atmosphere act like a blanket around the Earth, how is this "blanket” being changed by human activities?



If greenhouse gases in the atmosphere act like a blanket around the Earth, how is this “blanket” being changed by human activities?

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While at work, Joe asked Dana to show him how to change the copier paper. Joe kept working as she explained the process, and the next time the paper needed to be changed, Joe didn't do it correctly. What could Joe have done first to be a better active listener



While at work, Joe asked Dana to show him how to change the copier paper. Joe kept working as she explained the process, and the next time the paper needed to be changed, Joe didn’t do it correctly. What could Joe have done first to be a better active listener

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How has party-line voting in congress changed in the past few years?


1- The correct answer is B, as one result of the Great Society was that the lives of many underprivileged Americans improved.

The Great Society was a set of US national reform programs announced by President Lyndon B. Johnson for the first time in a speech at Ohio University on May 7, 1964 and more fully illustrated on May 22, 1964 at the University of Michigan. These reform programs were subsequently presented to the Congress of the United States and largely approved during the 1960s, thanks to the consent of its supporters of the Democratic Party.

Two main goals of social reforms were the elimination of poverty and racial injustice. During this period new large spending programs were launched in the fields of education, medical care, urban problems and transport. Johnson’s “Great Society” was linked, in its objectives and policies, to President Franklin Delano Roosevelt’s New Deal program.

Some proposals of the Great Society resumed initiatives contained in the New Frontier program, interrupted by the tragic death of President John F. Kennedy. Johnson’s success in promoting and endorsing his reforms depended on his considerable congressional political influence, his persuasion, and the favorable historical circumstances resulting from the 1964 presidential elections, which allowed the Democratic Party to dominate Congress and to elect the House of Representatives with the largest number of exponents of the liberal current since 1938.

The evolution of the Vietnam war and the massive involvement of the American military machine in the conflict, however, partly undermined the success of the “Great Society” program. Growing, huge expenditures for the continuation of the war made more difficult to finance the reform programs. Representatives of the Democratic Party against the war in Vietnam complained that military spending decisively stifled the Great Society program. On the whole, however, despite growing political and economic difficulties, which forced the administration to eliminate or reduce the financing of some projects, President Johnson managed to activate a series of programs of great importance, including Medicare, Medicaid, the Older Americans Act and the federal education funding, which are still active.

2- The correct answer is C, as the Immigration and Nationality Act of 1965 was necessary because the previous existing American immigration policies were discriminatory.

On October 3, 1965, President Lyndon B. Johnson signed the law into effect, saying: “The [old] system violates the basic principle of American democracy, the principle according to which the valuation and reward of each man should be established on the basis of his merits as a man. It has been anti-American in the highest sense, because it has been unfaithful to the faith that led thousands to these shores, even before we were a country. ”

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The model of the solar system changed, because


There are two systems in the human body that are responsible for the coordination between the functions of different systems to achieve the unity of the living organism’s body. These two systems are the nervous system and the endocrine system. The action of the nervous system is fast and takes a short time, while the action of the endocrine system is slow and takes a long time.

The functional unit of the nervous system is the nerve cell or the neuron. The neuron consists of a cell body and the axon. The cell body starts with the dendrites that receive the messages or the impulses from other neurons or from different sense organs or receptors. These impulses are then transmitted through the cell body. The cell body contains a nucleus and different organelles which help the nerve cell to perform its functions. The nerve impulse is then transmitted to the axon.

The axon is an extension from the cell body. There are some cells called Schwan cells that secrete a myelin sheath to insulate the axon from the surrounding medium. The insulated axons have more ability to conduct the impulses than non-insulated axons. The axon ends with the terminal arborizations. The terminal arborizations of a nerve cell connect to the dendrites of the next cell or to the afferent organ. The gaps between the dendrites and the terminal arborizations are called the synapses.

The nerve impulse is an electrochemical phenomenon i.e. an electrical phenomenon with a chemical nature. The membrane of the axon acts as a barrier between an outside positively charged medium and an inside negatively charged medium. This makes a potential difference of  -70mV. This state is called the resting potential. When the membrane is subjected to a stimulus, the positive charges enter to inside and the negative charges exit to the outside. The potential difference now becomes +40mV. This state is called the depolarization state. The point of stimulation acts as a new stimulus for the next point and so on. The membrane sooner gains its permeability again and the positive charges return to the outside and the negative charges to inside. This state is called repolarization.

The nerve impulse reaches the synapse. There are some neurotransmitters that are excited by the nerve impulse coming and carry the message across the membrane. Some receptors receive theses neurotransmitters on the dendrites of the next neuron. These receptors act as a stimulus for the new cell.

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Which describes the dependent variable in an experiment? A) the variable changed by the experimenter B) the quantity that must remain the same C) the variable that changes in response to the experiment D) the statement that is worded to test the experiment


There are two systems in the human body that are responsible for the coordination between the functions of different systems to achieve the unity of the living organism’s body. These two systems are the nervous system and the endocrine system. The action of the nervous system is fast and takes a short time, while the action of the endocrine system is slow and takes a long time.

The functional unit of the nervous system is the nerve cell or the neuron. The neuron consists of a cell body and the axon. The cell body starts with the dendrites that receive the messages or the impulses from other neurons or from different sense organs or receptors. These impulses are then transmitted through the cell body. The cell body contains a nucleus and different organelles which help the nerve cell to perform its functions. The nerve impulse is then transmitted to the axon.

The axon is an extension from the cell body. There are some cells called Schwan cells that secrete a myelin sheath to insulate the axon from the surrounding medium. The insulated axons have more ability to conduct the impulses than non-insulated axons. The axon ends with the terminal arborizations. The terminal arborizations of a nerve cell connect to the dendrites of the next cell or to the afferent organ. The gaps between the dendrites and the terminal arborizations are called the synapses.

The nerve impulse is an electrochemical phenomenon i.e. an electrical phenomenon with a chemical nature. The membrane of the axon acts as a barrier between an outside positively charged medium and an inside negatively charged medium. This makes a potential difference of  -70mV. This state is called the resting potential. When the membrane is subjected to a stimulus, the positive charges enter to inside and the negative charges exit to the outside. The potential difference now becomes +40mV. This state is called the depolarization state. The point of stimulation acts as a new stimulus for the next point and so on. The membrane sooner gains its permeability again and the positive charges return to the outside and the negative charges to inside. This state is called repolarization.

The nerve impulse reaches the synapse. There are some neurotransmitters that are excited by the nerve impulse coming and carry the message across the membrane. Some receptors receive theses neurotransmitters on the dendrites of the next neuron. These receptors act as a stimulus for the new cell.

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Earth’s climate ________. select one: a. has been stable over the history of the planet b. is changing as a result of natural and human processes c. will stabilize over the next century, according to the predictions of most scientists d. has changed only once due to the evolution of green photosynthesizing plants e. history is undeterminable because there is no method of studying climatic history of the planet


Natural Forces Affecting the Driver:

1. While the car stops, the person continues moving the way that the car were moving and then hits the obstacle in the car or the person can be thrown out of the vehicle. If the person wears belt, he will stop moving with the vehicle and won’t hit the obstacle.

2. We count approximate kinetic energy using the formula K = v^2. So the vehicle which is moving at 30 mph will have four times less kinetic energy than vehicle which is moving at 60 mph. If they have the same road conditions, the breaking distance will be four times as great for the car moving twice as fast.

3. Kinetic energy depends on object’s mass and velocity and it has direct relationship with the stopping distance. The lesser mass of the vehicle = the lesser kinetic energy and lesser stopping distance. => If both vehicles have the same velocity, then small vehicle has lesser kinetic energy than large vehicle.

4. We know that kinetic energy has this relationship with velocity K = v^2. So the best way to prepare to enter sharp curves in the roadway is to lower the speed. The most appropriate speed is 20-30 mph, but it depends on road conditions and car’s breaks condition.

5. Car crashes can happen with everyone so the best way is to be prepared. First the driver should wear a seatbelt while he’s driving. He should check his tires and breaks condition regularly. And also it’s important to slow down the vehicle while entering sharp curves. Without following these rules, the driver can get catastrophic injuries in a car crash.

Signs, Signals, and Pavement Markings: 

1. It doesn’t matter where you go. All you need is to learn highway code. It’s very different to know the meanings of every road sign. Also, it’s necessary to check your car’s conditions and you should take some spare parts for your car in case of accidents. So wherever you go, it’s important to be prepared.

2. You should stop before crossing and take few minutes to make sure there is no train approaching. If there is no train approaching, you can pass a railroad crossing. If you see approaching train, you should wait until it will pass a railroad crossing.

3. You should stop before the lights and wait to check the traffic movement and signs. Make sure that everything is safe and pass the intersection. Don’t move fast to avoid accidents.

4. Flashing yellow light means that it’s not necessary to stop but you should to pay attention on the traffic movement. So it would be better to yield before the lights and make sure if it’s safe to move. After that you can cross the intersection.

5. The line change means that the lane changes and you can’t cross solid lines. Pay more attention on road marking because it shows how you should behave on the road or highway.

6. As you approach the next exit and  your passengers need to use the restroom and get some food, you should look for green signs which indicate food and rest stops. You should to slow down if you don’t want to skip the sign.

7. When you take the exit ramp off the expressway and merge onto the next road, you see yellow lines dividing the roadway which indicates that there is oncoming traffic and this is a two-way highway. 

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What would happen to a normal chemical process in your cells if the shape of the enzyme controlling that process was changed by an environmental process?


Correct answer: C). Genetically different haploid cells

Meiosis is a type of cell division in which four haploid cells are produced, which are genetically different from the parent. It reduces the chromosome number exactly half as contained in the parent. That is why it is called as a reductional division.

In the first round of meiosis I homologous pairs of chromosome separate and the sister chromatids separate during meiosis II.

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“because data in a computer can be easily accessed and modified, that presents a challange for the investigators of a computer crime. what method is used to make sure the files the investigator have have not been changed from their original state found in the crime computer


Hey there!

Let’s assume that this question is referring to every digital calendar ever made. As in, even those made on devices without internet connectivity or any other fancy features that we utilize with many digital calendars today. 

If a planning device that came with a digital calendar didn’t have internet connectivity, it wouldn’t be able to be connected to the cloud. Back when these devices were around, it wasn’t even plausible to store things like calendar events and contacts in what we know as the “cloud”. Also, these devices probably had to be hardwired to a computer and new software had to be downloaded to them, so the updates weren’t automatic. Archaic, right?

Also, consider the fact that even reputable websites/companies such as Google with Google Calendars or Apple with iCalendar will never go without their malfunctions or threats. Sometimes, these websites can be hacked and the data that they contain can be compromised, especially if they’re stored on the cloud. Also, even though it’s not realistic, Google or Apple could one day decide to completely get rid of their calendar programs altogether. So, this means that digital calendars are definitely able to be destroyed or lost. 

That just leaves “They can be used anywhere”. This is true, even with those archaic devices specifically used for scheduling events and such. Nowadays, you have your phone and possibly a laptop on you at all times, which will likely have a calendar on it as a stock application. So, I think this is your answer. 

Hope this helped you out! 🙂

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Gutenberg’s printing press was not the starting pointing for modern history. a. True b. False 2. the arrival of cortes and pizarro changed history in the americas. a. True b. False 3. aztec, maya, and inca cultures are not important to the history of the americas. a. True b. False 4. the religions, beliefs and cultures of other civilizations and countries have affected american cultural life. a. True b. False 5. one can analyze history and conclude that it can be traced as a series of cause and effect relationships. a. True b. False


Mathew B. Brady  was one of the earliest photographers in American history, best known for his scenes of the Civil War. He studied under inventor Samuel F. B. Morse, who pioneered the daguerreotype technique in America. Brady opened his own studio in New York in 1844, and photographed Andrew Jackson and John Quincy Adams, among other celebrities. When the Civil War started, his use of a mobile studio and darkroom enabled vivid battlefield photographs that brought home the reality of war to the public. Thousands of war scenes were captured, as well as portraits of generals and politicians on both sides of the conflict, though most of these were taken by his assistants, rather than by Brady himself. After the war, these pictures went out of fashion, and the government did not purchase the master-copies as he had anticipated. Brady’s fortunes declined sharply, and he died in debt.

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Given the parent function of f(x) = x4, what change will occur when the function is changed to f(−2x)? Graph opens the same way and is narrower Graph opens the same way and is wider Graph opens the opposite way and is narrower Graph opens the opposite way and is wider


The basis to respond this question are:

1) Perpedicular lines form a 90° angle between them.

2) The product of the slopes of two any perpendicular lines is – 1.

So, from that basic knowledge you can analyze each option:

a.Lines s and t have slopes that are opposite reciprocals.

TRUE. Tha comes the number 2 basic condition for the perpendicular lines.

slope_1 * slope_2 = – 1 => slope_1 = – 1 / slope_2, which is what opposite reciprocals means.

b.Lines s and t have the same slope.

FALSE. We have already stated the the slopes are opposite reciprocals.

c.The product of the slopes of s and t is equal to -1

TRUE: that is one of the basic statements that you need to know and handle.

d.The lines have the same steepness.

FALSE: the slope is a measure of steepness, so they have different steepness.

e.The lines have different y intercepts.

FALSE: the y intercepts may be equal or different. For example y = x + 2 and y = -x + 2 are perpendicular and both have the same y intercept, 2.

f.The lines never intersect.

FALSE: perpendicular lines always intersept (in a 90° angle).

g.The intersection of s and t forms right angle.

TRUE: right angle = 90°.

h.If the slope of s is 6, the slope of t is -6

FALSE. – 6 is not the opposite reciprocal of 6. The opposite reciprocal of 6 is – 1/6.

So, the right choices are a, c and g.

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A 1.50-g sample of hydrated copper(ii) sulfatewas heated carefully until it had changed completely to anhydrous copper(ii) sulfate () with a mass of 0.957 g. determine the value of x. [this number is called the number of waters of hydration of copper(ii) sulfate. it specifies the number of water molecules per formula unit of in the hydrated crystal.]


This problem is to apply Roult’s Law.

Roult’s Law states that the vapor pressure, p, of a solution of a non-volatile solute is equal to the vapor pressure of the pure solvent, Po solv, times the mole fraction of the solvent, Xsolv

p = Xsolv * Po sol

X solv = number of moles of solvent / number of moles of solution

The solvent is water and the solute (not volatile) is glycerin.

Number of moles = mass in grams / molar mass

mass of water = 132 ml * 1 g/ml = 132 g

molar mass of water = 18 g/mol

=> number of moles of water = 132 g / 18 g/mol = 7.33333 mol

mass of glycerin = 27.2 g

molar mass of glycerin:, C3H8O3: 3 * 12 g/mol + 8 * 1 g/mol + 3*16 g/mol = 92 g/mol

number of moles of glycerin = 27.2g / 92 g/mol = 0.29565

total number of moles = 7.33333 moles + 0.29565 moles = 7.62898 moles

=> X solv = 7.33333 / 7.62898 = 0.96125

=> p = 0.96125 * 31.8 torr ≈ 30.57 torr ≈ 30.6 torr.

Answer: 30.6 torr

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You live “out in the middle of nowhere” and feel there is no need to protect your internet connection because there is no one that lives near you. one day you are unable to connect to the internet. after calling tech support you find that someone has hacked into your router and has changed all the settings. fortunately the hacker only wanted to use your internet connection and did not view any information on your computer. your decision to leave your router unprotected risked the integrity of the information on your computer. select yes or no.


Hey there!

Let’s assume that this question is referring to every digital calendar ever made. As in, even those made on devices without internet connectivity or any other fancy features that we utilize with many digital calendars today. 

If a planning device that came with a digital calendar didn’t have internet connectivity, it wouldn’t be able to be connected to the cloud. Back when these devices were around, it wasn’t even plausible to store things like calendar events and contacts in what we know as the “cloud”. Also, these devices probably had to be hardwired to a computer and new software had to be downloaded to them, so the updates weren’t automatic. Archaic, right?

Also, consider the fact that even reputable websites/companies such as Google with Google Calendars or Apple with iCalendar will never go without their malfunctions or threats. Sometimes, these websites can be hacked and the data that they contain can be compromised, especially if they’re stored on the cloud. Also, even though it’s not realistic, Google or Apple could one day decide to completely get rid of their calendar programs altogether. So, this means that digital calendars are definitely able to be destroyed or lost. 

That just leaves “They can be used anywhere”. This is true, even with those archaic devices specifically used for scheduling events and such. Nowadays, you have your phone and possibly a laptop on you at all times, which will likely have a calendar on it as a stock application. So, I think this is your answer. 

Hope this helped you out! 🙂

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. Please use complete sentences. How has music changed from prehistoric or ancient times?


In the workplace, classical can be played as a background to slowly introduce the type of music to the minds of children which could, overtime, cause children to develop a fondness or sense of familiarity for the music. Also, suggesting it and playing it with them at full attention could also help cause children to become interested in it, or, during playtime, naptime, or any period of time in which a child can focus on something, classical music can play, which will also help increase brainwave activity and strengthen focus as well as relaxation and help a child become more studious.

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Explain the method scientists use to study how Earth’s atmosphere and climate have changed during the past million years.


Answer:

1. DNA

2. Prokariotic.

3. Crossing over.

4. Maple tree

5. Primary producers.

6. DIAGRAM NOT SHOWN

7. Lipids.

8. A

Explanation:

1. DNA is the macromolecule responsible for carrying the herederitary information of all cells, and even some viruses, with the exception of retroviruses.

2. Prokariotic cells (eubacteria and archeas) are cosmopolite, and lacks a membrane defined nucleus.

3. Crossing over.

During meiosis, homolog chromosomes pair and exchange genetic material, is also known as genetic recombination. This makes the chromosomes inherited not exactly equal to the corresponding from our fathers, or grandfathers.

4. Maple tree belongs to the clade Angiosperms: flowering plants, which produce seeds. Moss is a flowerless plant, this does not produce seeds. Lichen are composed from algae and cyanobacteria (so, not plants). Mushrooms are not plants.

5. Primary producers, such as bacteria and algae, can make organic  molecules from an abiotic source of energy.

6. DIAGRAM NOT SHOWN

7. Lipids are the main component of all biological membranes. In animals, specially cholesterols prevents the membrane from freezing, due its molecular structure. Tryglicerids, for example, provides besides thermal insulation, energy storage, filling space for keeping the organs together, among other functions.

8. The phosphorous is very slow, since it requires the extraction from rocks, starting from metereological processes (rain, erosion), Once in the soil, bacteria, fungi, plants and animals start to absorb it.

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Janay is at a movie with her girlfriend, and the two are enjoying the rich visual scenes on the screen. as the visual information enters janays nervous system it is changed into a neural code that her brain can understand. as this occurs, janay starts to create a memory of the movie through the process of


The caste system determined people’s lives based on which social level/caste they were born in. The caste system determined people’s jobs, education, etc. Once a person was born into a caste, he/she could not leave, regardless of good intentions. However, it was possible for a person to marry into a higher caste.

The caste system provided a sense of order because it strictly organized people and families. The people could not misbehave or rebel against their social statuses.

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A change in a sequence of DNA bases in a bacterial cell has resulted in a mutation. This mutation has increased the ability of the bacteria to break down and digest organic molecules in the environment. Bacteria with this mutation are better able to find and utilize food sources. According to the theory of natural selection, what is MOST likely to occur in future generations of this bacteria? A) The relative frequency of the mutation will increase as time passes. B) Because the mutation has changed the DNA of the bacteria, a new species will be formed. C) Because the mutation is abnormal, the mutation will become more rare with every passing generation. D) Bacteria with the mutation will increase in number until the food supply is exhausted, causing the bacteria to become extinct.


Answer:

The correct answer would be B. CO, which comes from fossil fuel–powered engines, such as cars.

As the name suggests the primary pollutant is defined as the pollutant emitted directly from the source. For example, carbon monoxide which is produced due to incomplete combustion is emitted directly from cars, buses et cetera.

In contrast, secondary pollutant refers to the pollutant which is formed after reacting with other pollutants in the atmosphere. For example, nitrogen dioxide which is formed when NO reacts with oxygen, acid rain which is formed when nitrogen dioxide and sulfur dioxide reacts with water present in atmosphere et cetera.

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requirements of citizenship for ancient Athens, ancient Rome, and the modern United States. How has the idea of citizenship changed throughout history?


Answer:

d. They limit the president’s direct influence over some economic policies.

Explanation:

The independent agencies of the federal government of the United States are those that exist outside the federal executive departments of the United States (those that are headed by a secretary of the Cabinet). More specifically, the term can be used to describe agencies that are constitutionally part of the executive branch, but that are independent of presidential control, usually because of the power of the president to replace the head of the agency. or a member is limited.

Established separately through statutes approved by the United States Congress, each of the legal concessions of the authority defines the objectives of the agency that must work to achieve, as well as what substantive areas, if any, on which may have the power to regulate. These agencies rule (or regulations), while in force, they have the power of federal law.

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Thaddeus traded $3750 for British pounds, immediately changed his mind, and then promptly traded his British pounds back into dollars. Which of these amounts is he most likely to have?



Thaddeus traded $3750 for British pounds, immediately changed his mind, and then promptly traded his British pounds back into dollars. Which of these amounts is he most likely to have?

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Which answer correctly compares the outcomes after Worchester v. Georgia and Cherokee Nation v. Georgia? Georgia won in Cherokee Nation v. Georgia and the Cherokee were removed; Worchester v. Georgia gave the Cherokee more land in the West. The Cherokee won in Cherokee Nation v. Georgia, but that decision was overturned when Georgia won the Worchester v. Georgia decision. Georgia won in Cherokee Nation v. Georgia but little changed; Worchester v. Georgia was in favor of the Cherokee but they lost their land anyway. The Cherokee won in Cherokee Nation v. Georgia and remained on their land; Worchester v. Georgia was in also favor of the Cherokee but they lost their land anyway.


Answer:

The correct answer is B. The Election of 1800 was significant because it was the first peaceful transition of political power between opposing parties in U.S. history.

Explanation:

The Election 1800 marked the victory of Thomas Jefferson, of the Democratic Republican Party, over John Adams, of the Federalist Party and who held the presidency. Therefore, with this victory there was for the first time a transfer of command from one political party to another (since in 1796 the Federalist Party had won).