Mention the major issues that compose the scope of Geography?
Answers
Major issues of geography's cross-disciplinary relationships include:
Geography is a broad field of study since it includes history, science, environmental studies, and demographic studies. It also includes research on ethnicity, culture, the earthly features of the globe, and the economies of various regions.
Geography investigates the demographics, lands, and population of a region as well as the physical characteristics of that region. This field of research takes an all-encompassing interdisciplinary approach because its main goal is to create a flexible interaction between the people and the places they inhabit, among other things.
A problem must meet the following criteria to be considered a geographical issue: It must be the focus of extensive community discussion and debate (for example, in the media); It must be viewed over time and at a range of scales, from local to global. Have a dimension of space.
To know more about the issues that compose the scope of geography on
https://brainly.com/question/11298790
Related Questions
which of these soil components allows water to run through most quickly and forms the major part of desert soil?
Answers
Sand is the soil component that allows water to run through most quickly and forms the major part of desert soil. Sand particles have larger sizes compared to silt and clay particles, creating larger pore spaces between them. These larger pore spaces facilitate the rapid movement of water through the soil.
In desert environments, where water is scarce, the soil tends to have a higher proportion of sand due to the arid conditions and limited organic matter content. The sandy nature of desert soil allows water to pass through quickly, contributing to the low water-holding capacity and the arid nature of these ecosystems.
To know more about desert soil -
https://brainly.com/question/3522796
#SPJ11
which of the following statements is most accurate? group of answer choices distance to the sun is the primary control on seasons. the equator receives the direct rays of the sun once per year. the tilt of the earth is the primary control on seasons. the north pole never receives sunlight.
Answers
The most accurate statement among the following options is "the tilt of the earth is the primary control on seasons." The correct option is (c).
How do seasons occur?Seasons happen as a result of the Earth's axial tilt. During the year, the Earth rotates on an axis that tilts at an angle of 23.5 degrees. It's the tilt of the Earth's axis that causes the Sun's light to strike various regions of the planet at different angles, causing the seasonal changes. Seasons occur because of the tilt of the Earth's axis. The tilt of the Earth causes various regions of the planet to receive the Sun's light at different angles, causing the seasonal changes.
During the summer solstice in the Northern Hemisphere, the North Pole never receives any sunlight, but during the winter solstice, the North Pole receives 24 hours of sunlight, as it does during the summer solstice. Therefore, it is incorrect to say that the North Pole never receives sunlight.
Direct sunlight falls on the equator once a year, on the equinoxes, when the Sun is positioned directly over the equator. As a result, it is incorrect to claim that the equator gets the Sun's direct rays once a year.
Distance from the Sun is not a significant control on seasons, as it has little influence on the Earth's climate. Therefore, the statement, "distance to the sun is the primary control on seasons" is inaccurate and the correct option is (c).
To know more about seasons refer: https://brainly.com/question/923847
#SPJ11
During a thunderstorm, a plasma channel forms between the negatively charged clouds and the positively charged earth, which creates lightning. when lightning is observed, what has passed through the plasma channel? atoms electrons nitrogen water
Answers
Electrons.
An electrical discharge is lightning. The air around lightning may reach 30,000°C (54,000°F) in only one lightning strike! As a result of this intense heating, the air rapidly expands explosively. The expansion generates a shock wave, which develops into the thunderous sound wave.
High in a thunderstorm, ice crystals collide as they drift up and down in the tumultuous air.
As they collide with one another, ice crystals are knocked off and added to by tiny, negatively charged particles known as electrons. This divides the cloud's positive (+) and negative (-) charges. The base of the cloud becomes negatively charged, while the top of the cloud becomes positively charged with protons.
Positive charge is carried into the cloud by a powerful electric current that forms at the point where the stepped leader and positive charge collide. The return stroke is the name given to this electric current.
Learn more about Electrons here:
https://brainly.com/question/860094
#SPJ4
An island is 2.1mi due north of its closest point on a straight shoreline. A visitor is staying at a cabin on the shore that is 7.9mi from that point. The visitor is planning to go from the cabin to the island. Suppose that the visitor runs at a rate of 5mph and swims at a rate of 1mph. How far should the visitor run before swimming to minimize the time it takes to reach the island? Assume that the distance from the point on the shore closest to the island and the point at which the visitor: begins swimming is x. Then the time spent running by the visitor as a function of x is T r
=hr Assume that the distance from the the island and the point at which the visitor begins swimming is y. Then the time spent swimming by the visitor as a function of y is T s
=hr What is the total time spent running and/or swimming by the visitor as a function of x ? T(x)= hr How far should the visitor run from the cabin in order to minimize the time it takes for them to reach the island? mi What is the minimum amount of time it will take for the visitor to reach the island from the cabin? hr NOTE: you may use decimals in your answers to this problem. If you enter an answer containing decimals, make sure it is correct to at least 3 decimal places.
Answers
The visitor should run a distance of 7.9 miles from the cabin to minimize the time it takes to reach the island.
To determine the distance the visitor should run before swimming to minimize the time it takes to reach the island, we need to find the minimum point of the total time function, T(x).
Given:
Distance from the point on the shore closest to the island to the cabin = 7.9 mi
Distance from the island to the point at which the visitor begins swimming = y
Running speed of the visitor = 5 mph
Swimming speed of the visitor = 1 mph
Let's derive the total time function:
T(x) = T_r + T_s
To find T_r, we divide the distance to be covered by running (x) by the running speed:
T_r = x / 5
To find T_s, we divide the distance to be covered by swimming (y) by the swimming speed:
T_s = y / 1 = y
Substituting these values into the total time function:
T(x) = (x / 5) + y
We know that the distance from the cabin to the island is the sum of the distances covered by running and swimming:
x + y = 2.1
Rearranging the equation, we get:
y = 2.1 - x
Substituting this value of y into the total time function:
T(x) = (x / 5) + (2.1 - x)
Simplifying the equation:
T(x) = (x / 5) + 2.1 - x
To minimize the time, we differentiate T(x) with respect to x and set it equal to zero:
d(T(x)) / dx = (1 / 5) - 1 = 0
1 / 5 - 1 = 0
-4 / 5 = 0
Since -4 / 5 is not equal to zero, there is no critical point. We can conclude that the minimum time is achieved when the visitor runs the entire distance from the cabin to the island.
Therefore, the visitor should run a distance of 7.9 miles from the cabin to minimize the time it takes to reach the island.
The minimum amount of time it will take for the visitor to reach the island from the cabin is T(7.9) = (7.9 / 5) + 2.1 - 7.9 = 1.58 + 2.1 - 7.9 = 0.78 hours (or approximately 46.8 minutes).
To learn more about distance
https://brainly.com/question/28849882
#SPJ11
Question I (Human Geography) The table bellow shows the population distribution and land areas of five States of country B in the year 2010- (ke the data to answer the following question. STATE Population in millons) Total land area (in km²) 14D, WOO 98, CUD 35,000 86,00 3.2 millions 5.4 million 7.4 million 6.5 million 4.2 million V * a) Cakulate the :) The total population (2mcks) ii) The total land area (2 mrks) ii) Population density of country B
Answers
i) The total population of country B is 22.5 million.
ii) The total land area of country B is 23.5 million km².
iii) The population density of country B is approximately 0.957 million people per km².
It is given in the question
14D | 3.2 | 5.4 million
WOO | 5.4 | 7.4 million
98 | 7.4 | 6.5 million
CUD | 6.5 | 4.2 million
a) Calculation:
i) The total population:
Total population = Population of 14D + Population of WOO + Population of 98 + Population of CUD
Total population = 3.2 + 5.4 + 7.4 + 6.5
Total population = 22.5 million
ii) The total land area:
Total land area = Land area of 14D + Land area of WOO + Land area of 98 + Land area of CUD
Total land area = 5.4 + 7.4 + 6.5 + 4.2
Total land area = 23.5 million km²
ii) Population density of country B:
Population density = Total population / Total land area
Population density = 22.5 million / 23.5 million km²
Population density ≈ 0.957 million people per km²
Learn more about Population, here:
https://brainly.com/question/28670073
#SPJ1
both brazil and haiti are culturally unique in latin america because —
Answers
Answer: Look at the explanation below
Explanation: While most of Latin America speaks Spanish, in Haiti, people speak French and Brazil, people speak Portugese. Both nations played a role in getting their independence. Also, the fact that both French and the Portugese exported slaves from West Africa to the West Indies which is what we call the Carribean today.
Hope this clarifies your question.
What information is MOST important for you to confirm in smart IV pump settings?
a. battery (WRONG)
b. air in line
c. weight
d. light level
Answers
While battery life is important to monitor to ensure the pump remains operational, it is not as critical as ensuring that there is no air in the line, as this can cause immediate harm to the patient. Weight and light level are not typically critical parameters in IV pump settings.
In smart IV pump settings, the most crucial information to confirm is the weight of the patient. The weight is used to calculate accurate medication dosage. Additionally, it is important to monitor for any air in the line to prevent a life-threatening air embolism.
Explanation:In the context of medical settings, to ensure safe and accurate delivery of medications through a smart IV pump, the MOST important information to confirm is the weight of the patient (option c). The patient's weight is crucial in calculating the right medication dosage. Smart IV pumps often include weight-based dosing calculators. An error in the weight input might result in a patient receiving too much or too little medication.
Air in the line is another important factor to consider as it can lead to an air embolism which can be life-threatening. However, most modern smart IV pumps have air-in-line sensors which notify the healthcare provider if air is detected, therefore the risk is reduced considerably.
While it is also necessary to ensure adequate battery levels and light level for operation in a dark environment, these factors are not as crucial for patient safety as the patient's weight and avoiding air in the line.
Learn more about Smart IV Pump Settings here:https://brainly.com/question/33423121
#SPJ2
Real estate is defined as land and its permanent improvements. Which of the following is an example of an improvement to the land?
A) fence
B) building
C) sewer system
D) personal property
Answers
An example of an improvement to the land is a building. Option b is correct.
Real estate refers to the land, together with the structures and other permanent improvements attached to the ground, such as buildings, fences, sewers, and so on. Real estate does not include personal property like furniture and cars. Therefore, a building, as a permanent structure attached to the land, is considered a real estate improvement.
Similarly, fences are considered an improvement to the land if they are attached to the land and are meant to be permanent. Sewer systems can also be regarded as improvements to the land as they are attached to the land permanently.
Personal property such as cars, furniture, and clothing is not considered an improvement to the land since they are not permanently attached to the ground and are, therefore, not included in real estate.
Therefore, b is correct.
Learn more about Real estate https://brainly.com/question/29124410
#SPJ11
mention and discuss any three catastrophic results of radiation on the environment and human body
Answers
Three negative effects of radiation on the human body and the environment include:
CancerDNA mutationRedundancy in the growth of plantsRadiation is energy that is emitted in the form of electromagnetic waves or particles through a material medium. Radiation could be ionizing or non-ionizing. Excessive exposure to radiation can cause harm to humans and the environment.
When high-energy radiation in the form of neutrons, alpha, beta, gamma, and x-rays are released into the environment, they can disrupt the normal sequence of the DNA which bears the information about an organism. Reactive oxygen species are generated that oxidize proteins and cause mutations in the DNA.
The same thing applies to the DNA of plants and this can cause redundancy in their growth. This results in genetic defects. Cancer, which is the abnormal outgrowth of the cell also arises because of the cell damage caused by radiation.
Summarily, radiation can cause catastrophic results like cancer, DNA mutation, and redundancy in the growth of plants.
Learn more about radiation here:
https://brainly.com/question/18338019
Radiation can be electromagnetic radiation and particle radiation. The latter are high-velocity particles that are at most the size of an atomic nucleus.
This often concerns a continuous stream of particles, but it can also concern rare individual particles, such as in the case of cosmic rays, with a very high energy. Ionizing radiation in particular can be dangerous, for example caused by radioactivity.
In addition, other radiation can also be dangerous. Too much light is bad for the retina. Ultraviolet light can be bad for the skin. Excessive radiation can cause too much heat, resulting in skin burns, fire or other damage.
In the case of one-off radioactivity (such as in an accident or the use of a nuclear weapon) or the dismantling of a nuclear power plant (if radioactive material is not removed), the half-lives of the radioactive isotopes, which can vary widely, determine how quickly the danger is becoming.
Furthermore, the danger depends on the type of radiation and thus the penetration capacity in conjunction with the protective measures.
Learn more in https://brainly.com/question/9815840
advantage of dust particles in the air
Answers
It is important to note that while dust particles have advantages, excessive levels of airborne dust can have detrimental effects on human health, air quality, and environmental balance. Proper management and control of dust emissions are necessary to maintain a healthy and sustainable environment.
1. Nutrient Transport: Dust particles can carry essential nutrients such as phosphorus, nitrogen, and iron. These nutrients are vital for the growth of plants and can be transported over long distances through atmospheric dust. In regions where soil fertility is low, dust deposition can contribute to nutrient enrichment and support agricultural productivity.
2. Seed Dispersal: Dust particles can act as carriers for seeds, aiding in their dispersal over large distances. Seeds can attach to dust particles and be transported by wind currents, allowing plant species to colonize new areas and expand their range.
3. Cloud Formation: Dust particles serve as condensation nuclei for water vapor in the atmosphere, playing a crucial role in cloud formation. Water droplets form around the dust particles, leading to the creation of clouds. These clouds can have significant implications for weather patterns, precipitation, and climate regulation.
4. Sunlight Reflection: Dust particles in the atmosphere can scatter and reflect sunlight, leading to reduced solar radiation reaching the Earth's surface. This scattering effect can have a cooling effect on the climate, mitigating the impact of solar radiation and reducing the intensity of heatwaves.
5. Health Benefits: While excessive dust in the air can pose health risks, moderate levels of dust particles can actually have a positive impact on human health. Certain types of dust, such as clay or mineral-rich dust, can help in soothing respiratory conditions by acting as natural expectorants. They can assist in the removal of toxins and irritants from the respiratory system.
6. Soil Formation: Dust deposition contributes to soil formation processes by adding new mineral particles and organic matter to the soil. Over time, this accumulation of dust can enhance soil fertility and support plant growth.
for more questions on environmental
https://brainly.com/question/24182291
#SPJ8
Find the slope of the line that passes through (5,-2) (3,5)
Answers
9514 1404 393
Answer:
-3.5
Explanation:
Use the slope formula:
m = (y2 -y1)/(x2 -x1) = (5 -(-2))/(3 -5) = 7/-2 = -3.5
The slope is -3 1/2.
__
The equation for the graph is written in point-slope form, so we can check that the line has that slope.
Answer:
\( - 3.5\)
Explanation:
#CARRYONLEARNINGWhat is another animal that might have a larger than natural population because of human impact? Explain your reasoning.
Answers
Cows are probably an animal that is overpopulated because of the human species. This is happening because people need cows for what they can offer, such as milk or even food as a result they keep pushing the limits to get the most out of these animals.
Various animals might have a larger than natural population because of human impact; one is a domestic dog.
Through the human activities of using dogs as a pet, the population of dogs might have a larger than natural population.
The reason is simple, the demand for the dogs as pets would make humans breed dogs, thereby ensuring dogs have more births than a natural occurrence.
This is evident in a recent research survey conducted among pet owners.
It was revealed in 2017 that there are about 89.7 million domestic dogs in the United States.
This number revealed a 20 million increase in domestic dogs population compared to 68 million domestic dogs in 2000.
Hence, in this case, it is concluded that some human activities can positively impact the animal population.
Learn more here: https://brainly.com/question/3768323
When the north pole is tilted away from the sun, north america is experiencing which season?.
Answers
Answer:Winter
Winter: The northern hemisphere is experiencing winter when the North Pole is tilted away from the sun. You can see this in the picture of the Earth on the right. It is experiencing winter because it doesn't get as many direct sun rays.
Explanation:
russian territorial expansion into northern eurasia began in the
Answers
Russian territorial expansion into northern Eurasia began in the 16th century.
During this period, known as the Tsardom of Russia, Russian explorers and traders gradually expanded the boundaries of the Russian state into the vast territories of Siberia and the Far East. The conquest and colonization of Siberia began in the late 16th century under the rule of Tsar Ivan the Terrible and continued through subsequent tsars and rulers. The Russian expansion into northern Eurasia was driven by various factors, including the desire for natural resources such as furs, the establishment of trade routes, and the quest for geopolitical dominance in the region.
Learn more about Eurasia here:
brainly.com/question/30310588
#SPJ11
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.
the death rotates 1600km per hour on average, how ever as we move away from the equator the speed of the rotation decreases. Give a valid hypothesis to support a given statement.
Answers
The valid Hypothesis to support the statement is The speed of the Earth's rotation decreases as we move away from the equator due to the effect of Earth's latitude on the Coriolis force.
The Coriolis force is a result of the Earth's rotation and causes moving objects to be deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. This force influences the rotation speed of the Earth and its effect is stronger near the poles compared to the equator.
Based on this, a valid hypothesis could be that the speed of the Earth's rotation decreases as we move away from the equator due to the increasing influence of the Coriolis force. As we move closer to the poles, the Coriolis force becomes more significant, causing a decrease in the speed of rotation.
This hypothesis suggests that the rotation speed at the equator is higher compared to regions closer to the poles. It is supported by the understanding of the Coriolis force and its impact on the Earth's rotation. Further investigation and analysis of data, such as measurements of rotational speed at different latitudes, would be needed to confirm or refute the hypothesis.
Know more about Coriolis force here:
https://brainly.com/question/31959410
#SPJ8
In what us state would you find a zip code that starts with number 1
Answers
1 = Delaware (DE), New York (NY), Pennsylvania (PA) 2 = District of Columbia (DC), Maryland (MD), North Carolina (NC), South Carolina (SC), Virginia (VA), West Virginia (WV).
What is zip code?The United States Postal Service uses postal codes called ZIP codes. The fundamental format was unveiled on July 1st, 1963, and consisted of five digits. An expanded ZIP+4 code was introduced in 1983; it had the five-digit ZIP Code, a hyphen, and four more digits that indicated a more precise location.
1. A system of codes used as part of mailing addresses and assigned by the postal service; each code identifies a delivery area. 2. [often zip c-] A code number with five digits that is frequently increased to nine.
To know more about zip code, refer:
https://brainly.com/question/14491280
#SPJ4
What resource powered the 20th century and built the modern world?
Answers
The resource that majorly powered the 20th century and built the modern world is oil. Many renewable and non-renewable resources were used in the 20th Century but Oil has been a crucial resource for transportation, manufacturing, and energy production, making it a very important component of modern industrial societies.
Throughout the 20th century, the world was powered by fossil fuels that were instrumental in driving modernization and progress. Fossil fuel includes: coal, oil, and natural gas. The widespread use of fossil fuels played a critical role in powering the industrial revolution, facilitating the growth of transportation and communication networks, and driving economic development worldwide. But the use of these resources has come at a significant cost to the environment, with greenhouse gas emissions leading to climate change and other negative impacts on the planet. To work on the pollution generated by these fossil fuels, there is now a growing movement towards renewable energy sources as a cleaner and more sustainable alternative.
To know more about Resources,
https://brainly.com/question/14214221
An inner portion of the Earth which is rigid dense and soild and lies directly beneath the moho is called the
Answers
Answer:
The lithosphere
Explanation:
because that is the definition of the lithosphere
need asap
compare and contrast christianity and islam
at least 5 sentence
Answers
hope this helps! :)
Answer:
1. The Bible vs. The Quran
The Bible is read by many Christians. It has multiple books, written by different people all over the world (or, the known world at the time). The bible is filled with stories of the life of Jesus, Noah's Arch, The promised land, and more.
The Quran was received by Muhammad, the Arabian prophet, and founder of Islam. There are 114 chapters filled with rules said to be required by God, or Allah
Explanation:
The coriolis effect deflects wind direction. How does this process impact ocean surface currents?.
Answers
Ocean currents are deflected by a force caused by the rotation of the Earth also known as the Coriolis force.
The currents in the northern hemisphere turn to the right and head north. A different set of winds, the westerlies, push the currents back to the east at about 30 degrees north latitude, resulting in a closed clockwise loop.
The same thing happens below the equator in the southern hemisphere, except here the Coriolis effect deflects surface currents to the left, creating a counter-clockwise loop.
In order of this water in the ocean move slightly at an angle according to the flow of the wind which impacts its speed and direction and sometimes these loops results in cyclone.
To know more about the Coriolis forces click below--
https://brainly.com/question/916791
Pacific Islanders have suffered death and illness as a result of nuclear testing conducted in their region by __________ and European countries.
A.
Canada
B.
China
C.
Russia
D.
the United States
Answers
Nomadic pastoralists are people who continually move in order to find fresh grasslands or pastures for their livestock. Which group are pastoralists? (select all that apply)
A
Bambuti
B
Tuareg
C
Maasai
Answers
Hope it helps
Stay home stay safe !
Point A is located 7600 kilometers from the epicenter of this earthquake. How many minutes did it take the first S-wave to reach point A? * 1 point
9 mins
11 mins
15 mins
20 mins
Answers
What does ozone depletion potential (or 'odp') measure?
Answers
Ozone depletion potential (ODP) is a measure of the potential of a substance to cause ozone depletion. The ODP value of a compound is compared to that of CFC-11 and is a ratio of the amount of ozone depletion resulting from the chemical compared to the amount caused by the same mass of CFC-11. ODP values range from zero to one.
CFCs and other halocarbons are the most damaging chemicals to the ozone layer, with ODP values in the range of 0.5 to 1.0. ODP is an important concept in the field of environmental science, as the depletion of the ozone layer can have serious consequences for human health and the environment. It can lead to increased levels of UV radiation, which can cause skin cancer, cataracts, and other health problems. ODP is used to compare the environmental impact of different chemicals and to help scientists and policymakers make informed decisions about which substances to use and which to avoid.
To know more about amount visit:
brainly.com/question/32453941
#SPJ11
What was the type of government of Brazil after independence?
Democracy, Constitutional Monarchy, Communism, Dictatorship.
Answers
Of the natural resources produced in Africa, which one do you think was the most valuable in ancient times? Which natural resource do you think is the most valuable today? Explain your answer.
Answers
Answer:
gold is valuable they did not even consider silver but I still think it's still gold or limestone maybe
Africa is abundant with natural resources including diamonds, gold, oil, natural gas, uranium, platinum, copper, cobalt and iron bauxite.
Oil is one of the most valuable natural resources in the world, and one of the most essential to our modern way of life. Our transportation and manufacturing industries are completely reliant on petroleum product.
What is Natural Resource?Natural resources can be defined as the resources that exist (on the planet) independent of human actions.
What are top five important natural resource?WaterOilCoalForestsIronTo learn more about natural resources here:
https://brainly.com/question/13954163
#SPJ3
You find an igneous rock in your back yard. Is it possible that material from this rock formation could
ever form sedimentary rock on Earth's surface?
O Yes, energy from Earth's interior can cause igneous rock to break into small rock pieces that can form
sedimentary rock.
O No, sedimentary rock forms at Earth's surface because energy from the sun causes rock to weather, but
igneous rock under Earth's outer layer is not exposed to energy from the sun.
O Yes, if igneous rock is moved to Earth's surface and exposed to energy from the sun, it could weather into
small rock pieces that could form sedimentary rock.
No, sedimentary rock can only form out of material from other sedimentary rock. There is no way that
sedimentary rock can form from material in igneous rock.
Answers
Answer:
4
Explanation:
No, sedimentary rock can only form out of material from other sedimentary rock. There is no way that sedimentary rock can form from material in igneous rock.Plz Help Quick
Canada and the United States both have
A economic barriers that severely limit the importing of products from Mexico.
B separatist movements among their French-speaking people.
C major ports on both the Atlantic and Pacific coasts.
D superpower status in the world at large.
Answers
Answer:
D
Explanation:
Best regards to the physics assignments
why is the observation that the circular velocity of stars and gas is nearly constant with radius in our galaxy considered evidence for dark matter?
Answers
The observation that the circular velocity of stars and gas remains nearly constant with radius in our galaxy is considered evidence for the existence of dark matter. This observation challenges our understanding of gravity and suggests the presence of additional mass that cannot be accounted for by visible matter alone.
According to Newtonian physics, the orbital velocity of objects in a galaxy should decrease as their distance from the galactic center increases. This is because the gravitational force exerted by the visible matter (stars and gas) weakens with distance. However, observations of stars and gas in our galaxy have revealed that their circular velocity remains approximately constant with increasing radius.
This unexpected behaviour of the rotational velocity is known as the "galactic rotation problem" or "flat rotation curves." To explain this phenomenon, scientists propose the existence of dark matter, a hypothetical form of matter that does not interact with light and other electromagnetic radiation. Dark matter would provide the additional gravitational pull needed to keep stars and gas orbiting at higher speeds at larger distances from the galactic center.
The constancy of the circular velocity with radius suggests that there must be a significant amount of unseen mass distributed throughout the galaxy, which interacts gravitationally with the visible matter. Dark matter, which is estimated to make up around 85% of the total matter in the universe, provides a plausible explanation for the observed flat rotation curves and helps resolve the discrepancy between theoretical predictions and observational data. While the nature of dark matter remains elusive, its existence is inferred from its gravitational effects on visible matter, including the consistent rotational velocities observed in galaxies.
Learn more about stars here: brainly.com/question/31258649
#SPJ11