Answer:
(differences)
1- El Niña typically lasts 9-12 months while La Nina typically lasts 1-3 years even tho both occur every 3 to 5 years
2- El Niño refers to the above-average sea-surface temperatures that periodically develop across the east-central equatorial Pacific.
La Niña refers to the periodic cooling of sea-surface temperatures across the east-central equatorial Pacific.
3- Although El Niño and La Niña have an influence on global climate trends, they do not affect all regions similarly, nor do their impacts in a particular location. La Niña causes basically the opposite changes in temperature as El Niño in many areas, especially in the tropics.
henrietta leavitt found a relationship using the cepheid variables (in a star cluster) to help us determine distances. what was the correlation she found between the luminosity of a variable star and the period?
Heritage of Leavitt Using Cepheid variables, the distance to Andromeda of 2.5 million light-years was determined in the 1920s, demonstrating the galaxy's significant distance from the Milky Way.
What does the Cepheid variable do to let us calculate their luminosity?Distance Measuring with Cepheid Variables After determining a distant Cepheid's period, its brightness can be calculated using the known characteristics of Cepheid variables.
How can one determine the distances of star clusters or galaxies using the Cepheid period-luminosity relation?A Cepheid's fluctuation period correlates closely with its luminosity, as Henrietta Swan Levitt observed. The Cepheid becomes increasingly bright as the variability period lengthens. Astronomers have measured the distances to distant galaxies by observing Cepheid variables.
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What is the force required to keep the object sliding on a surface with the same speed?
The amount of force necessary to maintain an object is moving at precisely the same speed—or sliding friction—is measured. The object begins to move after the imparted force. static or sliding friction measurement.
The definition of friction force
Intensity of Friction What Is Frictional Force? Friction is the force that prevents motion when one object's face scrapes against another's surface. The mechanical advantage of a machine is diminished by friction, or even more specifically by a decline in the output to input ratio.
Why is friction an antagonistic force?
Rubbing acts as just a repelling force when one body moves through a surface. Friction is the result of two surfaces interacting with one another. If a layer is not fluid, then objects cannot move through it.
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you have a choice to drill your water well into a shallow, unconfined aquifer or a deep, confined aquifer. drilling deeper will cost more money; however, you chose to drill into the confined aquifer. why?
The limited aquifer's water quality will probably be better.
What sets confined aquifers apart from unconfined aquifers?Unconfined aquifers are those where the ground's rock is directly exposed at the surface and groundwater is continuously refilled, for instance by precipitation or snowmelt. Thick deposits that surround an aquifer and keep it enclosed from the Earth's surface or other rocks are known as confined aquifers.
Which aquifer—confined or unconfined—produces less water?Because there is less drawdown over a smaller area with an unconfined aquifer than with a confined aquifer for the same rate of water withdrawal, unconfined aquifers are often preferred to confined aquifers from a hydraulic standpoint.
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IIf the Sun were twice as massive
its pull on the Earth would double.
the pull of the Earth on the Sun would double.
Its pull on the Earth would double; and the pull of the Earth on lhe Sun would double.
none of the other choices arc correct.
Option C; If the Sun were twice as massive the pull of the Earth on the Sun would double.
A hot, incandescent ball of hydrogen and helium at the center of our solar system, our Sun is a 4.5 billion year old star. Despite the Sun's distance from Earth, which is around 93 million miles (150 million kilometers), life as we know it would not be possible on our planet without the Sun's radiation.
To fill the volume of the Sun, 1.3 million Earths would be required. The solar system is held together by its gravity, which keeps everything in orbit around it, from the largest planets to the smallest pieces of junk. The Sun's core, which reaches temperatures of more than 27 million degrees Fahrenheit, is its hottest region (15 million degrees Celsius).
Option C; If the Sun were twice as massive the pull of the Earth on the Sun would double.
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what building stands at 1,776 feet tall in a nod to the declaration of independence?
The building that stands at 1,776 feet tall in a nod to the Declaration of Independence is the One World Trade Center in New York City.
The One World Trade Center is the main building of the World Trade Center complex, which was built on the site of the original World Trade Center buildings that were destroyed in the September 11, 2001 attacks.
The height of 1,776 feet was chosen for the One World Trade Center as a symbolic reference to the year 1776, when the Declaration of Independence was signed. The One World Trade Center is the tallest building in the United States, and it is one of the tallest buildings in the world. It features a distinctive spire at the top that is lit up at night, making it a recognizable landmark on the New York City skyline.
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the sun burns ______ to make _____
A. hydrogen, helium
B. helium, hydrogen
C. propane, butane
D. butane, propane
A car travels with tangential speed V1 around curve of radius and turns to the left; as shown by the rear view of the car in Figure A force diagram of the forces exerted on the car with speed of 5 m/s as it turns is shown in Figure 2. force diagram of the forces exerted on the car with speed as it turns around the same curve of the same radius with the same tangential speed is shown in Figure 3. The speed of the car is most nearly
The speed of the car from the given three figures is most nearly 15 m/s.
How to calculate the speed of the car?For figure 2,
we know the exerted force speed is 5 m/s, so frictional force is
[tex]F_f[/tex] = [tex]\frac{Mv^2}{\gamma}[/tex]
= [tex]\frac{M(5)^2}{\gamma}[/tex]
For figure 3,
we know the frictional force is 9. So,
9 [tex]F_f[/tex] = [tex]\frac{Mv^2}{\gamma}[/tex]
Then using two figures we can calculate the speed of the car.
equation figure 3 / equation figure 2
=> 9 = v^2 / (5)^2
=> v^2 = 9*(5^2)
=> v^2 = 225
=> v = 15 m/s
Thus, the speed of the car is 15 m/s.
Your question is incomplete, but most probably your full question was
(image attached)
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A dynamo in a watch transfers 0.05 W of power every second to make a hand turn. Calculate the energy this transfers to the hand.
The energy transfered to the hand of the watch is 0.05 J.
What is energy?Energy is the ability or the capacity to perform work.
To calculate the energy transfered to the hand, we use the formula below.
Formula:
E = Pt...................Equation 1Where:
E = Energy transferedP = Power transferedt = TimeFrom the question,
Given:
P = 0.05 Wt = 1 secondsSubstitute these values into equation 1
E = 0.05×1E = 0.05 JHence, the energy transfered is 0.05 J.
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(a) what is the loss of kinetic energy (ki - kf) in the situation described in the example?
The loss of kinetic energy of the moving car is 238,866 J
Kinetic energy is the energy in a moving object due to its motion,
K.E. = 1/2 M[tex]V^{2}[/tex]
Given in the question,
Mass of big car M1 = 1640 kg
Mass of small car M2 = 820 kg
Initial velocity of big car V1 = 0
Initial velocity of small car V2 = 25.6 km/s
using the principle of conservation of momentum,
Total momentum before collision = total momentum after collision
M1V1 + M2V2 = V (M1+M2)
1640 × 0 + 820×25.6 = V ( 1640+ 820)
V = 820 ×25.6 /2460
= 8.53 Km/s
So, loss of kinetic energy of the small car = 1/2 M2[tex]V^{2}[/tex]
= 1/2 × 820× ([tex](25.6)^{2}[/tex] - [tex](8.53)^{2}[/tex])
= 238,866 J
The given question is incomplete, the complete question is
An 1640 kg car stopped at a traffic light is struck from the rear by a 820 kg car. The two cars become entangled, moving along the same path as that of the originally moving car. If the smaller car were moving at 25.6 m/s before the collision, what is the velocity of the entangled cars after the collision?
What is the loss of kinetic energy (Ki - Kf) in the situation described in the example?
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How do you find the missing angles when a transversal cuts through parallel lines?
To find the missing angles when a transversal cuts through parallel lines, use the properties of parallel lines and the corresponding angles formed when they are cut by a transversal. The angles will always add up to 180°.
To find the missing angles when a transversal cuts through parallel lines, you can use the properties of parallel lines and the corresponding angles formed when they are cut by a transversal. When a transversal cuts through two parallel lines, corresponding angles are equal, alternate angles are equal and consecutive angles are supplementary, meaning they add up to 180°. You can use these properties to calculate the missing angles. For example, if you know one angle and its corresponding angle are equal, you can use that information to calculate the other missing angles. You can also use the fact that alternate angles are equal and consecutive angles are supplementary to calculate the missing angles. Once you have all the angles, you can verify your answer by making sure that all of the angles add up to 180°.
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Executive agreements differ from formal treaties in that they 1) have been ruled unconstitutional by the U.S. Supreme Court. 2) must be approved by the U.S. Supreme Court but not by Congress. 3) do not have to be approved by the Senate 4) do not have to be approved by the House. generally formulated at 5) meetings of the United Nations. are Question 12 (1 point) The President can influence the legislative process through 1) communicating with the American public 2) leading his/her political party. 3) reporting on the State of the Union. 4) all of the above.
Executive agreements differ from formal treaties in that they 1) have been ruled unconstitutional by the U.S. Supreme Court. meetings of the United Nations. Option 5
The president can influence the public through : all of the above. Option 4
What is known as executive agreement?A treaty is ratified by the legislature, whereas executive agreements are ratified by the heads of government of two or more nations. To differentiate them from agreements that are legally enforceable, such as treaties, executive agreements are seen as having political force.
Presidents have routinely negotiated international accords on behalf of the United States without the Senate's advise or assent in recent decades. We refer to these as "executive agreements." Executive agreements are still enforceable in accordance with international law even when they are not submitted to the Senate for approval.
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CONVERT A COAL PRICE OF $90/TON TO $/MMBTU, ASSUMING A HEAT CONTENT OF 7,000 BTU PER POUND
A: $3.00/MMBtu
B: $34.50/MMBtu
C; $2.80/MMBtu
D: $6.42/MMBtu
E: $3.46/MMBtu
The coal price of $90/ton with a heat content of 7000 BTU per pound is D: $6.42/MMBtu.
The formula to calculat mmbtu from tons is as follows -
Price per mmbtu = price per ton × 500/ BTU per pound
Keep the values in formula to find the price per mmbtu
Price per mmbtu = (90×500)/7000
Performing multiplication in numerator on Right Hand Side of the equation
Price per mmbtu = 45000/7000
Performing division on Right Hand Side of the equation to find the price per mmbtu for coal
Price per mmbtu = $6.42/mmbtu
Thus, the correct option is D: $6.42/MMBtu.
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the sound intensity levels for a machine shop and a quiet library are 85 db and 40 db, respectively. what is the difference between the intensity of the sound in the machine shop and that in the library?
A point's sound intensity level is expressed in logarithmic units of decibels (dB) as a ratio between the sound there and the threshold of hearing.
A 30 dB sound has what kind of volume?Whispering is audible at 30 dB. 40 dB: Quiet sounds from the library. Fridge at 50 dB. Electric toothbrush at 60 decibels.
What decibel sound has a 95-decibel intensity?In decibels, sound is measured (dB). A motorcycle engine running is around 95 dB louder than a whisper (30 dB louder than typical conversation). Long-term exposure to noise levels above 70 dB may cause hearing impairment. Your ears may get immediately harmed by loud noises over 120 dB.
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What is the formula of MGBR?
The chemical formula of Magnesium Bromine MgBr₂.
As the name says MgBr, we can easily conclude that in this compound there are two elements present.
One of the elements is Magnesium which is denoted by Mg, while the other is Bromine which is denoted by Br.
Magnesium is a metal while bromine is a non-metal, the combination of both elements will be Magnesium bromide which is denoted by MgBr2, which is an ionic compound.
Magnesium bromide is a chemical compound which is formed by the combination of magnesium and bromine.
The chemical formula of Magnesium Bromine MgBr₂.
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What it means gains momentum ?
Answer:
to move faster
Explanation:
momentum, product of the mass of a particle and its velocityit has both magnitude and direction. Isaac Newton's second law of motion states that the time rate of change of momentum is equal to the force acting on the particle. See Newton's laws of motion.
Answer:
gaining speed
Explanation:
which produces the greater change in kinetic energy (assume that all of the work goes into kinetic energy)? group of answer choices . exerting a 10 n horizontal force through a distance of 5 m exerting a horizontal force of 40 n through a distance of 1m exerting a horizontal force of 20 n through a distance of 2 m exerting a 30 n horizontal force through a distance of 1.5 m
Since we know that kinetic energy equals work done, kinetic energy will produce more in the first scenario.Because the first case's work was more than the second, kinetic energy exists.
Does kinetic energy vary as a result of work?
According to the work-energy theorem, the net work performed by forces acting on an item equals the change in kinetic energy.
When does kinetic energy become more significant?
The kinetic energy of an object, in contrast to potential energy, is relative to other fixed and moving things that are present in its immediate vicinity. For instance, if the object is positioned at a higher height, its kinetic energy will be higher
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compared to the speed of the heavier block, what is the speed of the light block after both blocks move the same distance d ?
Compared to the speed of the heavier block, the speed of the light block travel is twice as fast.
Distance is an object's overall movement in a directionless fashion. Regardless of the starting or ending point.
Length can be defined as the quantity of space an object has covered.
We may find out an object's actual size by knowing how far away it is. The area an object covers in space above us can be measured. Once we understand how far away it is, we can calculate its true size. An thing appears smaller the further away it is.
The algebraic phrase known as the distance formula, which provides the distances between two places in terms of its coordinates. The distance formula for points in rectangular coordinates in two- and four Euclidean space are based on the Pythagorean theorem.
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projectile a is launched horizontally at a speed of 20 meters per second from the top of a cliff and strikes a level surface below, 3 seconds later. projectile b is launched horizontally from the same location at a speed of 30 meters per second. approximately how high is the cliff?
Answer:
the answers are 3 seconds and 44.1 m
Answer:
44M
Explanation:
a potato falling vertically downward is struck by a dart that is traveling vertically upward, as shown above. the dart and potato then collide, stick together, and continue moving after the collision. question consider the dart-potato system. which of the following graphs best represents the speed v of the center-of-mass of the dart-potato system, as a function of time t, before, during, and after the collision?
The graph representing a line with constant slope increasing represents the relation between speed and time of the dart-potato system.
Increasing slope represents that the slope is positive and as the quantity on x- axis increases, the quantity on y-axis also increases.
Momentum is said to be conserved before and after collision in a two-object system. Here, the two objects are said to be dart and potato. The potato and dart after collision are said to move by sticking together after the collision.
The potato-dart system is said to be moving with increasing velocity after the collision. The speed of the potato-dart system is given as v.
The question is incomplete. The speed v of the centre of mass of the dart-potato system, as a function of time t, before, during, and after the collision is represented by the graph attached below.
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What evidence supports the theory of ocean floor?
There is a sizable mountain range slicing through the ocean floor. Far from the ridges, deep pits can be found. Deeply below sea level, guyots have eroded tops.
What are the three signs of a spreading seafloor?The evidence is gathered. These conclusions are: There is a sizable mountain range slicing through the ocean floor. Far from the ridges, deep pits can be found. Deeply below sea level, guyots have eroded tops.
What proof is there that the ocean floor is expanding?Earthquake studies. Seismic investigations that show earthquakes happen along a mid oceanic ridge's rift valley and the cross-cutting fractures that offset it provide additional evidence for the spreading of the sea floor.
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Why is CO2 so important to the food industry?
CO2 is utilized for a variety of applications throughout the entire food industry.In addition to being used to create sugary beverages, CO2 is also employed in a number of other processes, including the drying of produce to lengthen its shelf life, the usage of dry ice to keep goods cool during shipping, the tranquilization of animals before to slaughter, and many others.
What are the food industries?The manufacturing of food and beverages is actually made up of more than 30 different industries.Slaughterhouses, the preparation of meat, poultry, & fish, grain mills, maltings, bakery, sugar confectioneries, the preparation of vegetables and fruits oils and fats, margarine, and oil seeds, pasta, baby food, and milk products are a few examples.
What are the food industry's four divisions?The agricultural service, producers, processors, & marketers are the major segments of the food industry.
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what must you do to keep it in focus? what must you do to keep it in focus? increase the f -stop value. move the lens away from the sensor or film. decrease the f -stop value. move the lens closer to the sensor or film. none of the above.
C) Move the lens closer to the sensor or the film . Option (c) is the right answer.
Assume that we are trying to take a picture or photograph of a moving object
as we know, the f-stop value tells us about the color of the image. That means it actually depicts that how dark is the image. would be. in simple words, it determines the amount of light that will be able to enter to the eye. Therefore, option a,b are incorrect.
Now the focus length of the camera is always fixed. Now let our object is moving away from the lens, then to keep it in focus, the camera must be moved closer to the object. This step is essential to keep focal length constant.
Hence, the correct option is (c).
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Two identical steel columns are used to support a level beam. Heat Heat B Image not displaying? As Column A gets heated, what happens to the ball? It moves left along the beam It falls straight down from its current position It moves right along the beam Nothing A streetlight is in a windstorm that exceeds the design rating. E Wind direction Light pole C D Base (в Ground Image not displaying? Which is the most likely location for a crack to start? A B D E An air tank is exposed to ambient temperature. If you set the air pressure of the tank to 35 psi for a leak test and find that 24 hours later the tank's pressure has increased, what could've happened? The tank leaked The tank drew in additional air The ambient temperature increased The ambient temperature decreased
A vertical structural component called a steel column is employed in building to offer crucial support. They might transfer loads from beams, ceilings, floor slabs, or roof slabs to floors or foundations, or they might transport loads in compression.
Additionally, bending moments along cross-section axes may be present in steel columns. Explanation: Beam-column structural members are those that experience simultaneous heavy axial compressive loads and bending. Only the existence of eccentric load application, end moments, and transverse loads distinguishes a beam-column from a column. 3. Describe girt. They might transfer loads from beams, ceilings, floor slabs, or roof slabs to floors or foundations, or they might transport loads in compression. Additionally, bending moments near cross-section may exist in steel columns.
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What is a maximum load weight?
Maximum load weight is the amount of permissiable load that can be carried by a vehicle in a particular country region.
Maximum load in a region is decided by the authority of that particular area. It can be calculated by subtract the curb weight from the GVWR . For example, if we have a truck with a GVWR of 9,000 pounds and a curb weight of 6,000 pounds, the load limit will be 3,000 pounds: GVWR – curb weight = load limit
Or we can say that the maximum allowable force that can be applied to a stage in a specified direction while meeting stage specifications is known as the maximum load weight.
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A 45 kg mass is dragged 50 m over a surface. If 1.0 kW of power is produced over 10 seconds,
what is the coefficient of friction for the surface?
Answer:
Approximately [tex]0.45[/tex] (assuming that the surface is level, the mass is moving at constant velocity, and that [tex]g = 9.81\; {\rm m\cdot s^{-2}}[/tex].)
Explanation:
With a power of [tex]P = 1.0\; {\rm kW} = 1.0\times 10^{3} \; {\rm W}[/tex], the work that would be done over [tex]t = 10\; {\rm s}[/tex] would be:
[tex]\begin{aligned}(\text{work}) &= (\text{power})\, (\text{time}) \\ &= (1.0\times 10^{3}\; {\rm W})\, (10\; {\rm s}) \\ &= 1.0 \times 10^{4}\; {\rm J}\end{aligned}[/tex].
Divide work by distance to find the force that did the work:
[tex]\begin{aligned} (\text{force}) &= \frac{(\text{work})}{(\text{distance})} \\ &= \frac{1.0\times 10^{4}\; {\rm J}}{50\; {\rm m}} \\ &= 200\; {\rm N}\end{aligned}[/tex].
If this mass is moving at a constant velocity, the magnitude of friction on this mass will be equal to that of the external force, [tex]200\; {\rm N}[/tex].
If the surface is level, the magnitude of the normal force on this mass will be equal to that of weight:
[tex]\begin{aligned}(\text{weight}) &= (\text{mass})\, g \\ &= (45\; {\rm kg})\, (9.81\; {\rm N\cdot kg^{-2}}) \\ &\approx 4.41 \times 10^{3}\; {\rm N}\end{aligned}[/tex].
Divide the magnitude of friction by normal force to find the coefficient of friction:
[tex]\begin{aligned}& (\text{coefficient of friction}) \\ =\; & \frac{(\text{friction})}{(\text{normal force})} \\ \approx\; & \frac{200\; {\rm N}}{(45\; {\rm kg})\, (9.81\; {\rm N\cdot kg^{-1}}))} \\ \approx \; & 0.45\end{aligned}[/tex].
a toad leaps straight upward. during takeoff, a 42 n normal force from the ground causes the toad to accelerate upward at 3.5 m/s/s. what is the mass of the toad?
The mass of the toad is 12kg if a 42N normal force from the ground causes the toad to accelerate upward at 3.5m/sec²
We know that according to newton second law of motion, which states that acceleration increase of a molecule is corresponding to the power applied to it and is toward this power. The proportionality steady is the mass m for a consistent mass molecule or an unbending body going through translatory movement whose inactivity can be decreased to a point.
We know that from newton second law of motion F=ma which is derived from the formula F=dp/dt where dp is the rate of change of momentum.Here. m is the mass of the body and a is the acceleration of the body.
We have F=42N,a=3.5m/sec²,m=?
Therefore,42N=m×3.5m/sec²
=>m=42N/3.5m/sec²
=>m=12kg
Hence, mass of the toad is 12kg.
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What is the distance between two wave front?
The distance between two wavefronts is termed as wavelength.
The wavelength of a sound wave is defined as the space between two adjacent wavefronts. The number of wavefronts the observer detects during a period of time can be used to calculate the wave's frequency.
The medium (such as a vacuum, air, or body of water) through which a wave travels determines its wavelength. Waves can be anything from music to light to water to periodic electrical signals. While light and other electromagnetic radiation use variations in electric and magnetic field strength, sound waves are variations in air pressure. Water waves are fluctuations in a body of water's height. Atomic locations change during the shaking of a crystal lattice.
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A narrow beam of light is travelling through a transparent liquid. It meets the surface as shown, at
an angle of incidence of 40°. The refractive index of the liquid is 1.5.
air
liquid
40
What is the angle of refraction as the light enters the air?
A 25
B 27
C 60°
D 75
Answer:
the correct answer is B) 27.
Explanation:
To find the angle of refraction, you can use the formula:
n1 * sin(angle of incidence) = n2 * sin(angle of refraction)
where n1 and n2 are the refractive indices of the two media (in this case, air and the liquid), and the angles are measured from the normal to the surface.
Plugging in the values from the problem, we have:
1 * sin(40) = 1.5 * sin(angle of refraction)
Solving for the angle of refraction, we get:
angle of refraction = sin^-1(1/1.5 * sin(40))
Using a calculator or a table of trigonometric functions, we can find that the value of sin^-1(1/1.5 * sin(40)) is approximately 27.3 degrees.
Therefore, the correct answer is B) 27.
Explain the characteristics of galaxies and galaxy
clusters.
Answer:
Some of the key characteristics of galaxies and galaxy clusters include their size, shape, and structure. Galaxies and galaxy clusters are also distinguished by the presence of dark matter, a mysterious substance that is thought to make up most of the mass in the universe. Additionally, galaxies and galaxy clusters are important sites for the formation and evolution of stars and other celestial objects.
Explanation:
Galaxies are vast collections of stars, gas, and dust that are held together by gravity. They come in a variety of shapes and sizes, ranging from small, irregular galaxies to large spiral galaxies with well-defined arms. Galaxies also contain a central region known as the nucleus, which may be home to a supermassive black hole.
Galaxy clusters are groups of galaxies that are held together by gravity. They are the largest structures in the universe, and they can contain hundreds or even thousands of individual galaxies. Galaxy clusters are typically separated by vast distances, and they are bound together by the mutual gravitational attraction of their constituent galaxies.
What are examples of genetic risk factors?
Risk Genetic a medical condition that affects one or more of your immediate relatives. having a family member who was diagnosed with a disease at a young age (typically before age 55).
What are two instances of genetic influences?The reason one child has blonde hair like their mother and their sibling has brown hair like their father, for instance, is genetic. Additionally, genes influence both the gender of newborns and why some diseases run in families.
What elements are deemed genetic?Genetic factors play a significant role in many diseases. It follows that either all or portion of the risk is inherited from one's parents. One such illness is CADASIL, which is brought on by a mutation in just one gene.
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