Suppose you have a strong peak at 2530 cm^-1. What is the wavelength of the radiation that was absorbed?

Answers

Answer 1

The wavelength of the radiation that was absorbed is approximately 1.19 micrometers (µm).

To calculate the wavelength of the radiation that was absorbed, we can use the following equation:

wavelength = speed of light / frequency

where the frequency is given by:

frequency = wave number x speed of light

The wave number is the reciprocal of the wavelength, expressed in inverse centimeters (cm^-1).

Therefore, to find the wavelength of the radiation that was absorbed, we need to convert the wave number to frequency, and then use that frequency to calculate the wavelength.

Given a strong peak at 2530 cm^-1, the corresponding frequency can be calculated as:

frequency = 2530 cm^-1 x (speed of light) = 2.53 x 10^14 Hz

Using this frequency, we can now calculate the wavelength of the radiation as:

wavelength = speed of light / frequency = 2.998 x 10^8 m/s / 2.53 x 10^14 Hz = 1.19 x 10^-6 meters

Therefore, the wavelength of the radiation that was absorbed is approximately 1.19 micrometers (µm).

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Related Questions

Which statement is TRUE
about Mercury?
A. It is the largest planet in our solar
system.
B. It is a gas giant.
C. It is the closest planet to the Sun.
D. It has three moons.

Answers

Answer:

C. It is the closest planet to the Sun.

C. IT IS THE CLOSEST PLANET TO THE SUN

Define soil erosion. Describe factors causing soil erosion. Explain measures to be adopted to tackle soil erosion.

Answers

Answer:

Soil erosion is the process by which top soil particles, specifically on steep inclines such as riverbeds, hills, or mountains are loosened or washed away.

Explanation:

Factors include heavy rainstorms, removal of natural trees, bushes, and other vegetation from the area, and water runoff.

Measures to counteract erosion include planting more permanent vegetation, installing geotextiles, and riprap (stabilizing stones and boulders).

Rock faults are ruptures along which opposite faces of rock have slid past each other. In the figure, points A and B coincided before the rock in the foreground slid down to the right. The net displacement
AB
is along the plane of the fault. The horizontal component of
AB
is the strike-slip AC. The component of
AB
that is directly down the plane of the fault is the dip-slip AD. (a) What is the magnitude of the net displacement
AB
if the strike-slip is 22.5 m and the dip-slip is 16.9 m ? (b) If the plane of the fault is inclined at angle φ=50

to the horizontal, what is the magnitude of the vertical component of
AB
?

Answers

(a) Magnitude of net displacement of dip-slip and strike-slip is |AB| = 523.15m.

(b) The vertical component of net displacement is x = 400.7 m.

Vectors are the quantities that have magnitude as well as direction. Though the question is stated in 3-D but we can imagine the problem in 2-D as the main vectors acting are in 2-D with each other. Resultant vector is the vector sum of the vectors which is basically the point or position or direction in which the combined action of all vectors occurs.

Net displacement is the resultant of dip-slip vector and strike-slip vector which is evaluated as,

AD = 16.9 m

AC = 22.5 m

Net Displacement = |AB| = \(\sqrt{|AD|^2+|AC|^2}\)

Putting the values of variables from question,

|AB| = \(\sqrt{(16.9m)^2+(22.5m)^2}\)

|AB| = 523.15 m

Therefore, magnitude of net displacement of dip-slip and strike-slip is |AB| = 523.15m.

(b) Now according to the question, we have been provided with the horizontal angle of AB vector and the value of its vertical component is being asked.Any vector, on substitution yields two components. One is the cos component and the other is the sin component.

As we have been provided with horizontal angle and is asked for vertical component, hence the vertical component of net displacement (let x) is,

x = ABsinϕ

Putting value of ϕ from question and of AB from the last part,

x = 523.15 sin (50°)

Calculating the equation will give,

x = 400.7m

Therefore, the vertical component of net displacement is x = 400.7 m.

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if glacial meting exceeds snowfall rates, then terminus of a glacier will retreat. group of answer choices true false

Answers

True. If glacial melting exceeds snowfall rates, the amount of ice and snow that accumulates on the glacier will decrease over time, which will cause the glacier to shrink and the terminus (the point where the glacier meets the surrounding land or water) to retreat.

Suppose a new volcano suddenly formed in the middle of the United States.
1. What most likely caused the formation of this volcano?
2. Would you expect it to be composite, shield, or cinder cone volcano? Explain your reasoning.

(Sorry if this is the wrong subject. I wasn't sure what to put it under)

Answers

1 tectonic plates

2 I think composite but I'm not shur.

explian how pollution domes increase the maintenance costs of bulit environment for people living in the city​

Answers

Modern air pollutants have the ability to destroy organic coatings and polymers, which are crucial to modern structures, while rising levels of fine diesel soot ruin the clean, basic surfaces and lines typical of many modern structures.

What is pollution?

The introduction of pollutants into the environment's natural systems results in negative change, which is referred to as pollution. Any substance, whether solid, liquid, or gas, or energy, can be considered a kind of pollution (such as radioactivity, heat, sound, or light).

The constituents of pollution, known as pollutants, might be either naturally existing contaminants or substances or energy that are not of our own making. Despite the fact that natural disasters can result in environmental contamination, the word pollution often suggests that the toxins are manmade, or that they came from human activity.

Point source pollution and nonpoint source pollution are two common classifications of pollution.

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Which color has the most energetic photons?


violet

blue

orange

red

Answers

Red is the answer im sure

Which of the following problems did Central America face after the end of colonization?

a. an increase in violence over land reform measures

b. continuing struggle to create stable governments

c. continuing struggle to create a stable economy

d. all of the above

Answers

Answer:

try d. all of the above.

Explanation:

most of the time if it's there, then it's most likely the right answer :)

Answer:

D

Explanation:

The oldest operating airline in the world is the national dutch airline known by which three letters?.

Answers

Answer:KLM

Explanation: abbreviation of Koninklijke Luchtvaartmaatschappij NV (Dutch: Royal Air Transportation Company), English: Royal Dutch Airlines, Dutch airline founded on Oct. 7, 1919, and flying its first scheduled service, between Amsterdam and London, on May 17, 1920.

30 POINTS

Select five U.S. counties. Determine where these counties are located and use the information on the map to create a graph representing the information. Select the type of graph that will work best for this purpose. You may round the population to the nearest thousand (Remember to round up if the last three digits are 500 or more; round down if the last three digits are 499 or less.)

Create your graph and identify the counties you selected and their populations. Explain which type of graph you chose to make and why.

image down below

30 POINTSSelect five U.S. counties. Determine where these counties are located and use the information

Answers

The best type of graph to use will depend on the specific data being presented and the message that needs to be conveyed. One of the most suitable for this is choropleth map.

Which graph will best represent and identify the selected county?

I will choose Los Angeles County in California, United States.

Los Angeles County is located in southern California and is part of the Los Angeles metropolitan area. It is the most populous county in the United States, encompassing the city of Los Angeles and numerous other cities and communities.

The type of graph that will work best for representing Los Angeles County depends on the specific data or information that needs to be conveyed.

I will use choropleth map, which can be used to visually represent geographical data, such as population density or income levels, in Los Angeles County. Different areas within the county can be shaded or colored differently based on the data values, providing a visual representation of the variations across the county.

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When returning from open sea and you see a red buoy, how should you respond? A. Keep the buoy to your port (left) side B. Keep the buoy to your starboard (right) side C. Pass the buoy on either side D. Stop the boat and wait for instructions

Answers

When navigating through waterways, buoys are often used to mark channels, obstructions, or other navigational hazards. These buoys come in different colors, each with its own meaning.

Red buoys are used to mark the right side of a channel or an obstruction, while green buoys mark the left side. When returning from open sea and encountering a red buoy, it is important to keep the buoy on your starboard (right) side. This helps to ensure that boats are traveling in the same direction and can avoid collisions. Adhering to navigational buoy markings is crucial for safe and efficient boating, particularly in busy waterways with high levels of traffic.

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Mt. Rainier in Washington State is often thought to be the most hazardous volcano in the lower 48 states of the United States because ________.

Answers

Mt. Rainier in Washington State is often thought to be the most hazardous volcano in the lower 48 states of the United States because even a minor eruption might melt enormous volumes of glacial ice on the mountain, resulting in severe lahars that could spread fast down river valleys to densely inhabited regions. This is further explained below.

Washington State and Volcanos?

Generally,  It is estimated that there are active volcanoes in the state of Washington that pose a significant or very significant risk of eruption. There is Glacier Peak and Mount Baker.

In conclusion, Washington State is blessed with a lot of mounting but these mountains also constitute the volcanic threats.

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Magmas low in silica:
(mark all that are correct):
a) result in more passive
eruptions than high-silica magmas
b) are less viscous and flow easily
c) tend not to inhibit passage of gas
that tries to escape through it
d) may contain up to ~75% SiO2
by weight

Answers

Magmas low in silica result in more passive eruptions than high-silica magmas, are less viscous and flow easily and tend not to inhibit passage of gas that tries to escape through it. The correct option is a, b, and c.

a) Result in more passive eruptions than high-silica magmas: This statement is correct because low-silica magmas are less viscous, allowing gases to escape more easily and resulting in less explosive eruptions.

b) Are less viscous and flow easily: This statement is also correct. Low-silica magmas have a lower viscosity, which means they can flow more easily compared to high-silica magmas.

c) Tend not to inhibit the passage of gas that tries to escape through it: This statement is correct as well. Due to their lower viscosity, low-silica magmas allow gases to escape more easily, reducing the likelihood of explosive eruptions.

d) May contain up to ~75% SiO2 by weight: This statement is incorrect. Magmas low in silica typically contain less than 55% SiO2 by weight. High-silica magmas contain higher amounts of SiO2, sometimes reaching up to 75%.

The correct option is a, b, and c.

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as the climate continues to change, what is most likely in the atlantic ocean?

Answers

As the climate continues to change, it is most likely that the Atlantic Ocean will experience various effects, including rising sea levels, changes in ocean temperature, frequency of extreme weather events.

The Atlantic Ocean is expected to experience rising sea levels due to the melting of polar ice caps and the thermal expansion of seawater. This can result in coastal erosion, increased coastal flooding, and the displacement of coastal communities. Changes in ocean temperature and circulation patterns can lead to shifts in marine ecosystems and the distribution of species.

Warmer ocean temperatures can also fuel the intensification of hurricanes and tropical storms, potentially affecting coastal areas. These changes in the Atlantic Ocean's environment can have significant impacts on marine life, coastal communities, and the overall functioning of the oceanic system.

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A Jet takes off and travels 56 miles to achieve an altitude of 12.6 miles. What is the angle of elevation for the jet's path?

Answers

Answer: 13

Explanation:

A Jet takes off and travels 56 miles to achieve an altitude of 12.6 miles. The angle of elevation for the jet's path is 13.

What is an angle?

An angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle. Angles formed by two rays lie in the plane that contains the rays. Angles are also formed by the intersection of two planes. These are called dihedral angles. Two intersecting curves may also define an angle, which is the angle of the rays lying tangent to the respective curves at their point of intersection.

Angle is also used to refer to the measure of an angle or of an angle of rotation. This measure is conventionally defined as the ratio of the length of a circular arc to its radius, and may be signed.

In the case of a geometric angle, the arc is centered at the vertex and delimited by the sides.

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A road was cut through a hilly area exposing the rock face. Which rock unit is the youngest? A. Limestone B. Sandstone C. Basalt D. Shale E. Granite

Answers

Answer:

B. Sandstone

Explanation:

The youngest rock unit is the one that is on top of the others. In this case, the rock that is exposed at the top of the road cut through the hilly area is the youngest. This would be Sandstone.

HELP!! 100 POINTS AND BRAINLIEST!!!

Choose three possible solutions to the problem. (immigration to the us). Briefly compare and contrast the advantages and disadvantages associated with these solutions. In the table below note three advantages and disadvantages for each solution. BE sure to use research to support your claims.

Answers

Answer:

What are the advantages and disadvantages of immigration?

Immigration can give substantial economic benefits – a more flexible labour market, greater skills base, increased demand and a greater diversity of innovation. However, immigration is also controversial. It is argued immigration can cause issues of overcrowding, congestion, and extra pressure on public services.

Explanation:

HELP!! 100 POINTS AND BRAINLIEST!!!Choose three possible solutions to the problem. (immigration to the
HELP!! 100 POINTS AND BRAINLIEST!!!Choose three possible solutions to the problem. (immigration to the

The Cretaceous-Tertiary (K-T) boundary event took place how many millions of years
ago?
A. 540

B. 245

C. 65

D. 25G

Answers

The Cretaceous-Tertiary (K-T) boundary event took place 67 millions of years ago.  Option C is the correct answer.

Although radiometric dating provides a more specific date of 66.043 Ma, its age is typically assumed to be approximately 67 million years old. The K-Pg boundary has been linked with the extinction event that occurred in the Cretaceous-Pa a worldwide calamity that exterminated all Dinosaur species but safeguard for birds. Option C is the correct answer.

The Cretaceous-Paleogene (K-Pg) border, originally the Cretaceous-Tertiary (K-T) boundary, is a geological landmark that is often represented by a narrow band of rock that has a disproportionately high concentration of iridium compared to other bands. The Paleogene era, the first era of the Cenozoic Era, and the Cretaceous phase, the last phase of the Mesozoic Era, are both marked by the K-Pg boundary.

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old, cold, and dense oceanic crust is select one: a. destroyed at subduction zones b. eventually becomes incorporated into continental crust c. created at spreading ridges d. always found on plate margins e. found closest to continental margins

Answers

Option C, The right response is subduction zones, where things are destroyed. At spreading ridges, when magma reaches the surface from the mantle & solidifies to produce new crust, the oceanic crust is formed.

At subduction zones, this ancient, cold, and heavy oceanic crust gets heavier with age and starts to sink into the mantle. The oceanic crust melts in subduction zones because of the high pressures and temperatures there, and it eventually becomes assimilated into the mantle.

The movement of tectonic plates, which causes the creation of mountains and earthquakes, is caused by the oceanic crust sinking into the mantle. A crucial component of plate tectonics, which aids in explaining the formation, is the cycle of production and replacement of the oceanic crust.

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The question is-

Old, cold, and dense oceanic crust are ____.

a. created at spreading ridges

b. found closest to continental margins

c. destroyed at subduction zones

d. eventually becomes incorporated into continental crust

e. always found on plate margins

give an example of a cyclical change, a small-scale change, and a large-scale change that might affect the amazon river basin

Answers

The Amazonian region's climate is changing. Since 1980, the average temperature in the Amazon basin has increased by around 0.7 degrees Celsius (1.26 degrees Fahrenheit).

Examples of cyclical, large-scale, and small-scale changes that might have an impact on the amazon river basin:

Cyclical change: it includes Earthquakes, oceanic tides, the moon's cyclical phases, and the different times of the year.Small-scale change: it includes fires, floods, and droughts.Large-scale change: Greenhouse gas emissions, atmospheric Changes, water use, land and water pollutants.

Every year, the Amazon River basin receives around 2000 mm of rain. The Amazon River, which is the greatest river in the world in terms of annual flow, is fed by this enormous quantity of precipitation.

According to recent research, the southeastern Amazon, which makes up about 20% of the overall Amazon rainforest, is currently releasing more carbon than it is taking in. Deforested, dried-out, and burned trees release their stored carbon as carbon dioxide into the atmosphere. Overall, scientists think that the Amazon may only be able to absorb half as much carbon dioxide as it did 40 years ago, demonstrating how deforestation and fire are causing a climate disaster of unprecedented scope.

Therefore,  

Examples of cyclical, large-scale, and small-scale changes that might have an impact on the amazon river basin:

Cyclical change: it includes Earthquakes, oceanic tides, the moon's cyclical phases, and the different times of the year.Small-scale change: it includes fires, floods, and droughts.Large-scale change: Greenhouse gas emissions, atmospheric Changes, water use, land and water pollutants.

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100 points how many species live in tress and no not bactiral just animals

Answers

Answer:

Eight of 10 species  (i think)

How did the motivations God, Glory, and Gold impact how Europe interacted with other regions (the Americas, Africa, and Asia)?

Answers

Answer:

The Europeans basically invaded and stole land from the native for these reasons. They took control over the government in parts of America and Africa. The British specifically tried to make parts of America mercantilism states and get gold. The Spanish wanted all 3, trying to force the native to change religions. The French wanted to make trading post and convert natives to Catholicism. All of this comes back to Europeans wanting power and control.

Which precipitation and vegetation descriptions best fit an Aw climate in the Köppen classification? Which precipitation and vegetation descriptions best fit an Aw climate in the Köppen classification? Well-defined winter dry season; savanna with drought-tolerant trees Every month has 6 cm of precipitation or more; lush tropical vegetation At least 10 times as much precipitation in a summer month as the driest winter month; vegetation short and thick Well-defined summer dry season; vegetation sparse Short dry season, precipitation of driest month has less than 6 cm but equal to or greater than 10-R/25; thick green vegetation

Answers

Answer:

Well-defined winter dry season and savanna with drought-tolerant trees

Explanation:

In the Köppen classification, Aw climate refers to Tropical savanna climate with dry-winter characteristics. In this climate, there is low rainfall in winter which make it very dry while on the other hand, more rainfall occurs in the summer season. The vegetation of such type of climate is drought resistance because there is less amount of water is received by the area in this type of climate so that's why we can say that Aw climate is Tropical savanna climate.

"Explain how deforestation can have economic impacts" (6 marks)

Answers

The Economic Impact of Deforestation

Deforestation and economic impact cannot be the two sides of the same coin. As long as there is economic growth our environment would continue to be on the verge of danger.

Each year our environment gets degraded little by little and the forests are the ones who have to pay a huge price for the increased profits. A loss of 27% has been attributed due to the conversion of forests for agriculture and other energy consumption purposes. About 50% of the forests became the victims of forestry operations and another 23% came into the clutches of the wildfire.

Now the above points may summarize the negative impact but let us take a lot into few points about the negative impact of deforestation.

The short-term effects: While clearing out the forests may generate a high level of income. Still, at the same time, some other important factors should be taken into accounts such as the exploitation of the lives of poor people living in rural areas, poor working conditions and labour exploitation due to the conversion of changes the forest lands into agricultural lands.

Ignoring the big picture: Not only do forests provide us with the gifts of nature but at the same time they are the homes to 80% of the known and unknown species of the world. Clearing out the forests erases the natural habitat, resulting in the extinction of many species worldwide. Not only the animals are in danger but the loss of biodiversity could cause a loss of billions in the field of science.  

Disrupting the water cycle and increasing soil erosion: As the water cycle changes, it harms a few specific industries. On the other hand, forests lock the soil and its nutrients together and prevent them from being washed down by the water.  

Global warming: No one can ignore the fact that as more forests get cleared from the land, the temperature of the Earth would continue to increase leading the climatic changes and global warming.

Long-run economic profits: The forests may now contribute towards the short-run economic profits but in the future, if we fail to preserve the forests there would be a huge global impact in the long run. There may come a time when forests would be completely eradicated from the face of the earth.  

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fill in the blank.surface ocean circulation is driven primarily by____and modified by___. question 11 options: density differences; the coriolis effect and land density differences; differences in salinity and temperature latitude; differences in salinity and land wind; the coriolis effect and land wind; gravity and density

Answers

Surface ocean circulation is driven primarily by the Coriolis effect and modified by density differences.

The Coriolis effect causes the movement of water to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere, resulting in the formation of gyres, which are large systems of rotating currents. Land wind, such as the trade winds and westerlies, also play a role in driving surface ocean circulation by pushing surface water in the direction of the prevailing wind.

Density differences, on the other hand, are caused by variations in temperature and salinity. Water that is colder and saltier is denser and sinks, while warmer and fresher water is less dense and rises. This creates vertical movements of water that can affect the horizontal flow of ocean currents. Overall, a combination of these factors drives surface ocean circulation, which plays a crucial role in regulating global climate and distributing nutrients and heat around the world.

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when may hazardous wind shear be expected?

Answers

Hazardous wind shear can occur in a variety of weather conditions and is characterized by rapid and unpredictable changes in wind speed and/or direction. It can be especially dangerous for aircraft during takeoff and landing, as well as for ships at sea.

Wind shear can be expected in the vicinity of thunderstorms, where strong winds aloft can collide with weaker winds at the surface, causing significant turbulence. It can also be found near fronts, where contrasting air masses meet and create winds with different speeds and directions. Mountain waves, generated by strong winds flowing over mountains, can also produce wind shear. In addition, wind shear can be caused by wind gradient, which occurs when winds increase with altitude, or by jet streams, which are strong, fast-moving air currents located at high altitudes. Wind shear can also occur in the vicinity of microbursts, which are intense downward currents of air from a thunderstorm that can cause sudden, severe turbulence. In order to avoid hazardous wind shear, it is important for pilots to be aware of weather conditions and to monitor wind reports, including turbulence and wind shear warnings. Additionally, advanced wind shear detection and warning systems have been developed to provide real-time information to pilots and air traffic controllers.

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Which of the following are constructed to reduce beach erosion? Choose one: A. bogs. B. groins. C. polyps. D. mangroves

Answers

the question inquires which of the following are constructed to reduce beach erosion. The options are A. bogs, B. groins, C. polyps, and D. mangroves.

The correct answer is B. groins. Groins are structures built perpendicular to the shoreline to help reduce beach erosion by trapping and accumulating sand, which helps maintain the beach's width and protects the shoreline.

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erek designed an experiment to demonstrate interactions between earth systems. he cleared a patch of land in his backyard and poured a glass of water from a height of 12 inches above the ground. a depression was formed on the land at the spot where the water hit the ground. what does derek's experiment best demonstrate? interactions between biosphere and atmosphere interactions between hydrosphere and geosphere interactions between biosphere and hydrosphere interactions between atmosphere and geosphere

Answers

Derek's experiment best demonstrate interactions between hydrosphere and geosphere.

Water that dropped from the sky and touched the Earth's surface caused the hydrosphere and geosphere to interact. Precipitation, including rain or snow, can fall to the surface of the Earth when a portion of the atmospheric air becomes saturated with water. This precipitation facilitates weathering and erosion, two surface processes that gradually reduce huge rocks to smaller ones, and so links the hydrosphere to the geosphere.

The biosphere, a global ecosystem that includes all life on Earth, has a home in both the geosphere and the hydrosphere. The geosphere is made up of every rock on Earth, from the melting rock beneath the crust to the massive, age-old mountains to the sand grains on the seashore.

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how is hydrofracking used to obtain natural gas from rocks deep in the earth?

Answers

HYDRAULIC fracturing, or fracking, is a drilling method used to extract petroleum (oil) or natural gas from deep in the earth. In the fracking process, cracks in and below the earth surface are opened and widened by injecting water, chemicals, and sand at high pressure. Hope this helps you.

Name 2 oceans where the upwelling takes place with the thermohaline circulation?

Answers

Answer:

The thermohaline circulation is mainly driven by the formation of deep water masses in the North Atlantic and the Southern Ocean caused by differences in temperature and salinity of the water.

Explanation:

Other Questions
colonial administrators drove ______ into the labor market by imposing land, housing, and livestock taxes that they would be unable to pay without additional income. which of the following is cited as a probable cause of the witchcraft hysteria of the 1690s in salem? 1 - 2 /Solve1=W=DONE y=(3x+15)(x-2)in standard form What is drugs? nonsense=reported A coin bank contains $12.45 in quarters and dimes. If there are 16 more dimes than quarters, how many are there of each? Use the disributive property to finish the expression that is equivalent to 12 + 4x.12 + 4x = ___ (3 + x) Consider the function represented by the table.For which x is f(x)=3?7445 Which model is useful in showing the reactivity of potassium?Neither model is able to show the reactivity of potassium.Model 1 because it shows an electron in the 4s orbital.Model 2 because it shows an electron in the outermost ring.Both models because each shows an electron in the outermost shell. please need complete solution :( If f ( x ) = x 2 and g ( x )= 2x - 2,find f ( g ( 7 ) ) Find The Area Of The Parallelogram, the successively flashing lights of a las vegas casino produce a perceptual response similar to that of: group of answer choices a 40 nc charge and a 10 nc charge are separated by a distance of 2.00 m. where between the charges is the electric field equal to zero? Two objects gravitationally attract each other with 80n force. if the distance between them doubles, what is the gravitational force between them? Which best retells the central idea in this excerpt? Stanton's childhood wish for her father to value her like a son shaped her actions for the rest of her life. Stanton's childhood desire to get an education provided her with more opportunities for her future. Stanton's father would never value his daughters as much as he valued his one and only son. Stanton's father would appreciate his daughter more if she learned Greek and knew how to manage a horse. A boundaryless organization is one that what? Unlike Lincolns plan, Andrew Johnsons plan for Reconstruction _______________.a.included a plan for amnestyb.was focused on quickly reuniting the the nationc.established a military presence in the Southd.required ratifying the 13th AmendmentPlease select the best answer from the choices providedABCD what does 'comrades' mean in animal farm? Help me please with this ASAP