A soccer ball is kicked upward with a vertical speed of 10 m/s and a horizontal speed of 8 m/s. How long will the ball remain in the air
Answers
The soccer ball was in the air for approximately 0.819 seconds.
To find the time of flight of the soccer ball, we can analyze its motion in the horizontal and vertical directions separately.
Given:
Initial speed (v₀) = 8.50 m/s
Launch angle (θ) = 28.0°
In the horizontal direction:
The horizontal velocity (vₓ) remains constant throughout the motion since there is no horizontal acceleration. We can calculate the horizontal component of the initial velocity as follows:
vₓ = v₀ x cos(θ)
Substituting the given values:
vₓ = 8.50 m/s x cos(28.0°)
vₓ ≈ 7.524 m/s
In the vertical direction:
Vertical motion is affected by gravity, and we can use the equations of motion to determine the time of flight. The vertical component of the initial velocity is:
vᵧ = v₀ x sin(θ)
Substituting the given values:
vᵧ = 8.50 m/s x sin(28.0°)
vᵧ ≈ 4.033 m/s
The time of flight (t) can be found using the vertical motion equation:
Δy = vᵧt + (1/2) x g x t²
Since the ball lands at the same level from which it was kicked, the change in vertical position (Δy) is zero. Therefore:
0 = vᵧt + (1/2) x g x t²
Using the value for acceleration due to gravity, g = 9.8 m/s²:
0 = 4.033 m/s t + (1/2) (9.8 m/s²) t²
Simplifying the equation:
(1/2) * (9.8 m/s²) t² = -4.033 m/s x t
Solving this quadratic equation, we find two possible solutions for time. However, the negative solution can be disregarded in this context.
t ≈ 0.819 s
Therefore, the soccer ball was in the air for approximately 0.819 seconds.
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Related Questions
two large flat plates in parallel planes are at 15 c and 200 c. the cold plate has an emissivity of 0.6 and the hot plate has an emissivity of 0.2. find the net rate of heat transfer
Answers
The net rate of heat transfer between the two plates is 1027.5 W.
We can use the Stefan-Boltzmann law to calculate the rate of heat transfer between the two plates:
Q = σ A (\(Th^4\) - \(Tc^4\))
where Q is the net rate of heat transfer, σ is the Stefan-Boltzmann constant (\(5.67 x 10^-^8 W/m^2K^4),\) A is the area of the plates facing each other, Th and Tc are the temperatures of the hot and cold plates in Kelvin, respectively.
To use this equation, we need to convert the temperatures from Celsius to Kelvin:
Th = 200°C + 273.15 = 473.15 K
Tc = 15°C + 273.15 = 288.15 K
The area of each plate facing the other is equal, so we can use the area of one plate:
A = (length)(width)
Let's assume that the plates are both square with sides of length 1 meter, so:
A = (1 m)(1 m) = 1 \(m^2\)
Now we can calculate the net rate of heat transfer:
Q = σ A (\(Th^4 - Tc^4)\)
\(= (5.67 x 10^-^8 W/m^2K^4)(1 m^2)[(473.15 K)^4 - (288.15 K)^4]\)
= 1027.5 W
Note that we need to use the emissivity values to calculate the net rate of heat transfer only if the plates are not ideal blackbodies. Since the emissivity values are given, we can also use them to calculate the net rate of heat transfer:
Q = σ A\([(Th^4)(εh) - (Tc^4)(εc)]\)
where εh and εc are the emissivities of the hot and cold plates, respectively. Substituting the values, we get:
Q = \((5.67 x 10^-^8 W/m^2K^4)(1 m^2)[(473.15 K)^4(0.2) - (288.15 K)^4(0.6)]\)
= 1027.5 W
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Help number 3 ASAP !!!
Answers
an electrical potential is a form of what type of energy? multiple choice question. kinetic energy thermal energy potential energy chemical energy
Answers
An electrical potential is a form of potential energy .Potential energy refers to the energy stored in an object or system based on its position or configuration.
In the case of electrical potential, it is the potential energy associated with the arrangement of electric charges or the separation of charges in an electrical system.
Electric charges have the ability to exert a force on one another due to their electric fields. When charges are separated by a distance in an electrical system, they possess potential energy.
This potential energy can be converted into other forms of energy, such as kinetic energy when charges are allowed to move or thermal energy when resistive elements in a circuit dissipate energy as heat.
Therefore, electrical potential represents the potential energy per unit charge that can be converted into other forms of energy in an electrical system.
It is distinct from kinetic energy, which is the energy of motion, thermal energy, which is the energy associated with heat, and chemical energy, which is the energy stored in chemical bonds.
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The diameter of a copper wire is thought to be approximately 0.3mm which instrument should be used to obtain a more accurate measurement of the diameter of the wire
Answers
Answer:
A micrometer caliper.
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1) Our beaches in Florida are lined with large hotels and condominiums. Natural vegetation was
cleared away from the beaches to make room for the buildings. What is a consequence that we
have seen on Florida beaches as a result of clearing the vegetation for building? mail
odt bas
A. There is less food from the vegetation to feed the citizens of Florida
B. There is more and more erosion of the beaches in Florida
C. The fishing is not as abundant as it once was in Florida
D The sand is heating up at record levels on our beach
Answers
In Florida, beaches are eroding at an increasing rate. Because natural vegetation is crucial for supporting the sand, clearing it off beaches may cause erosion to worsen.
What measures is Florida taking to stop beach erosion?The department's Coastal Construction Control Line (CCCL) Program safeguards coastal resources from erroneously placed and designed buildings and activities that could cause erosion, undermine the stability of the beach and dune system, expose upland property to storm damage, or obstruct public access.
Which kind of erosion issue does Florida have?There are more than 1,000 miles of beaches in Florida alone. All residents who live along the coast face a high risk of coastal erosion due to the state's practically complete coastline.
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as the base width of a bjt increases, the common-base current gain α of the transistor will increase
Answers
In a BJT, the width of the base narrows as the reverse bias across the base-collector junction rises, increasing the collector current.
What effect does base width modulation in BJT have?Base width modulation, also known as the early effect, is a change in a bipolar transistor's base width brought on by a change in the applied base-to-collector voltage. For instance, the collector-base depletion width rises with increasing reverse bias across the collector-base junction.
When the base voltage of a BJT is raised, what happens to the emitter current in the collector?The base current rises with VIN, which in turn raises the collector current. At some point, the voltage drop across the collector resistor RC will be sufficient for the BC junction to start moving into the forward-bias zone.
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In the absence of friction, explain why the horizontal component of a projectile’s velocity is a constant.
Answers
Answer:
This downward force and acceleration results in a downward displacement from the position that the object would be if there were no gravity. The force of gravity does not affect the horizontal component of motion; a projectile maintains a constant horizontal velocity since there are no horizontal forces acting upon it
A person on a daily diet of 2,500 calories should get no_more than
calories from fat each day.
Answers
Answer:
35%
Explanation:
Answer:
its 83
Explanation:
object Travels 24 M with a speed of 4 metre per second and then another 32 with a speed of 8 metre per second the average speed of the object is
(a)6m/s (b)4m/s (c)5.6m/s (d)6.5m/s
Answers
Answer:
Total distance covered S=16+16=32 m
Total time t=4+2=6 s
Average speed V
avg
=
t
S
=
6
32
=5.33 m/s
The coldest clouds in the ISM are molecular clouds, so named because their temperatures are low enough and their densities high enough for atoms to join together into molecules. These clouds are capable of collapsing to form new stars, in a stellar nursery like the one in the left image. The Pleiades (right image) is an example of stars that formed recently within such a nursery.
Molecular clouds range in mass from a few times the mass of our Sun (solar masses) to 10 million solar masses. Individual stars range from 0.08 to about 150 solar masses.
What does all of this imply about how stars form from molecular clouds?
Answers
Stars form from molecular clouds through a process known as stellar formation.
These clouds, characterized by low temperatures and high densities, provide the ideal conditions for atoms to combine and form molecules. With a mass range spanning from a few solar masses to millions of solar masses, molecular clouds serve as the birthplaces of new stars. The Pleiades cluster serves as a notable example of stars that have recently formed within such a stellar nursery.
The formation of stars from molecular clouds involves several key steps. Firstly, gravitational forces acting on regions of higher density within the cloud cause them to collapse under their own gravity. As the cloud collapses, it begins to fragment into smaller, denser clumps called protostellar cores. These cores continue to collapse, and their central regions become increasingly dense and hot. At this stage, they are known as protostars.
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he figure below shows three rotating, uniform disks that are coupled by belts. one belt runs around the rims of disks a and c. another belt runs around a central hub on disk a and the rim of disk b. the belts move smoothly without slippage on the rims and hub. disk a has radius r; its hub has radius 0.4400r; disk b has radius 0.2700r; and disk c has radius 1.600r. disks b and c have the same density (mass per unit volume) and thickness. what is the ratio of the magnitude of the angular momentum of disk c to that of disk b?
Answers
The difference between disc C's and disc B's angular momentum is equal to 308.29, Both vector and scalar values use magnitude as a common factor.
Linear momentum's rotating equivalent is angular momentum, often known as moment of momentum or angular momentum. It is a conserved quantity, meaning that in a closed system, the total angular momentum stays constant, making it a significant physical quantity. In physics, magnitude is referred to as an object's maximal size and direction. Both vector and scalar values use magnitude as a common factor. We know that scalar quantities are those that have magnitude and nothing else by definition.
LC/ LB = (1/2)ρπRC2 h RC2ωC / (1/2)ρπRB2 h RB2ωB =1024
LC/ LB = ( 1.600R)4 /4(0.2700R)4
LC/ LB = 6.5536 / 0.02125764
= 308.29
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Explain why there is a delay between the arrival of the sound transmitted through the steel pipe and the sound transmitted by the air in the pipe.
Answers
Answer: RATE ME AND MAKE ME BRAININESS AND THANK ME
Explanation:Sound waves are pressure waves that travel through Earth's crust, water bodies, and atmosphere. Natural sound frequencies specify the frequency attributes of sound waves that will efficiently induce vibration in a body (e.g., the tympanic membrane of the ear) or that naturally result from the vibration of that body.
Sound waves can potentiate or cancel in accord with the principle of superposition and whether they are in phase or out of phase with each other. Waves of all forms can undergo constructive or destructive interference. Sound waves also exhibit Doppler shifts—an apparent change in frequency due to relative motion between the source of sound emission and the receiving point. When sound waves move toward an observer the Doppler effect shifts observed frequencies higher. When sound waves move away from an observer the Doppler effect shifted observed frequencies lower. The Doppler effect is commonly and easily observed in the passage of planes, trains, and automobiles.
The speed of propagation of a sound wave is dependent upon the density of the medium of transmission. Weather conditions (e.g., temperature , pressure, humidity , etc.) and certain geophysical and topographical features (e.g., mountains or hills) can obstruct sound transmission. The alteration of sound waves by commonly encountered meteorological conditions is generally negligible except when the sound waves propagate over long distances or emanate from a high frequency source. In the extreme cases, atmospheric conditions can bend or alter sound wave transmission.
The speed of sound in steel is about 17 times as fast as it's speed in air.
Naturally, when a sound starts out at one end of a pipe, it reaches the other end thru the steel before it reaches the other end thru the air in the pipe.
The longer the pipe is, the longer will be the delay between the arrival of the two sounds at the other end.
blank is the equation that relates wave speed, frequency and
wavelength (wave speed = frequency x wavelength).
Answers
Answer:
i'm pretty sure it is wave speed or wave
During which step of the scientific method does a scientist determine
whether the hypothesis was supported?
A. Perform the experiment
B. Collect data
C. Draw conclusions
D. Design an experiment
SUBMN
PREVIOUS
Answers
Answer:
A
in performing the experiment the hypothesis is proved wrong or correct prediction , meaning of prediction is guessing,
hypothesis the second stage of scientific method , scientist predict or guess the answer to the problem ,
Experiment the third stage of scientific method
scientist examine the ways
"Perform the experiment" is the step of the scientific method where a scientist determines whether the hypothesis was supported.
What step of the scientific method is used to prove if the hypothesis is accepted or rejected?In the scientific method, experiments (often with controls and variables) are devised to test hypotheses. In the scientific method, analysis of the results of an experiment will lead to the hypothesis being accepted or rejected.
How do scientists determine whether a hypothesis is correct?The basic idea of a hypothesis is that there is no predetermined outcome. For a solution to be termed a scientific hypothesis, it has to be an idea that can be supported or refuted through carefully crafted experimentation or observation.
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based on the data collected and the hypothesis, what happens to the diffraction angle when the wavelength is increased?
Answers
The wavelength will be longer, increasing the diffraction angle.
Define the wavelength?The separation between two successive wave crests or troughs is known as a wavelength.
Here are some wavelength illustrations: Yellow Light, for instance. All visible light has a wavelength between 400 and 700 nanometers (nm).
Radio waves, light waves, and infrared (heat) waves are examples of electromagnetic radiation that flow through space in distinct patterns.
The symbol for the wavelength in the SI is often the letter m. Additionally, multiples or fractions of a metre are employed when calculating wavelength. The use of exponential powers of 10 is noteworthy when wavelengths are a significant feature.
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Answer:
Simple Response: The diffraction angle of the waves is approximately equal to the wavelength divided by the gap width. Therefore, increasing the wavelength will increase the diffraction angle.
Explanation:
Which of the following statements is true? Communicable diseases cannot be transmitted by nonliving objects. Sexually transmitted diseases are spread by direct contact with bodily fluids. Gastrointestinal diseases are usually transmitted by infected water droplets in the air. The best prevention against communicable diseases is over-the-counter medication.
Answers
Answer:
Sexually transmitted diseases are spread by direct contact with bodily fluids.
Explanation:
if you have a disease you can give it to someone by having sex because your fluids go into or either combine
Answer:
B
Explanation:
An electric field from a charge has a magnitude of 4.5 x 10^4 N/C at a certain
location that points outward. If another charge with a magnitude of -2.0 x 10^-6 C
is brought near it, what is the strength of the electrostatic force that acts on this
charge and how do the two charges behave?
0.09 N; repel each other
-0.09 N; attract each other
-2.3 N; repel each other
2.3 N; attract each other
Answers
Answer:
4.5 x 10^4 x -2 x 10^-6 = -0.09N
Explanation:
-0.09N
You toss an apple across the room to a friend. Which of the following
statements is true about the apple at the top of its trajectory?
Answers
Your question is incomplete. Please find below the complete question.
B. Its acceleration is 9.8 m/s^2 down.
What does acceleration mean?Acceleration, is the rate at which speed adjustments with time, in phrases of pace and path. A point or an item moving in a line is expanded if it hurries up or slows down.
We always have a vertical (downward ) acceleration of 9,8 m/s^2. The horizontal acceleration is zero in case you overlook friction forces. The vertical issue of speed is zero on the top of the trajectory whilst the horizontal component isn't like zero in any other case the apple will no longer arrive at your buddy.
You toss an apple across the room to a friend. Which of the following statements is true about the apple at the top of its trajectory?
A. Its acceleration is zero.
B. Its acceleration is 9.8 m/s2 down.
C. The horizontal component of its velocity is zero.
D. The vertical component of its velocity is 9.8 m/s down.
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The temperatures (in degrees Fahrenheit) in Long Island recorded by the weather bureau over a week were 42, 49, 53, 55, 50, 47, and 52. Which measure should the weather bureau use to calculate how far apart the upper and lower quartiles of the week's daily temperatures were?
Answers
Answer:
Inter Quartile Range
Explanation:
Quartile is a positional statistical average, which divided the data into 4 equal halves.
Q1 (Lower Quartile) has 25% data below it, 75% above it. Q3 (Upper Quartile) has 75% data below it, 25% above it.
Interquartile range is the measure used to calculate how far the lower & upper quartiles are.
i hope its still not a black screen help please
Answers
Which of the following is equal to impulse?
A. Ft
B. m/s
C. pt
D. mv
Answers
Explanation: The impulse experienced by the object equals the change in momentum of the object. In equation form, F • t = m • Δ v
Multnomah Falls in the Columbia River Gorge has a
sheer drop of 543 ft. Using steady flow energy equation, estimate
the water temperature
Answers
A precise estimation of the water temperature at Multnomah Falls using only the sheer drop height would not be possible without considering the factors mentioned above.
The steady flow energy equation, also known as Bernoulli's equation, relates the pressure, velocity, and elevation of a fluid along a streamline. However, it does not directly provide a means to estimate the water temperature.
To estimate the water temperature at Multnomah Falls, additional information and considerations are required, such as:
Ambient Temperature: The air temperature in the surrounding environment can provide an indication of the potential range of water temperature.
Source of Water: Determining the source of the water, such as a river, groundwater, or snowmelt, can help infer the temperature characteristics.
Seasonal Variation: Considering the season and the associated temperature trends can provide insight into the potential water temperature range.
Geological and Climatic Factors: Understanding the geological characteristics of the area and the prevailing climate can help in assessing temperature patterns.
Data from Local Sources: Consulting local weather reports, hydrological surveys, or other relevant sources that provide water temperature data in the vicinity of Multnomah Falls can give a more accurate estimate.
It's important to note that water temperature can vary significantly in different locations, depths, and seasons, and it is influenced by various factors such as sunlight exposure, ambient temperature, and thermal properties of the environment.
Hence, a precise estimation of the water temperature at Multnomah Falls using only the sheer drop height would not be possible without considering the factors mentioned above.
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A 0.14-MIN baseball is dropped from rest. It has a momentum of 0.90 kg⋅m/skg⋅m/s just before it lands on the ground.
For what amount of time was the ball in the air?
Answers
The time spent in the air by the ball at the given momentum is 6.43 s.
The given parameters;
momentum of the ball, P = 0.9 kgm/sweight of the ball, W = 0.14 NThe impulse experienced by the ball is calculated as follows;
\(Ft = \Delta P\)
where;
\(Ft\) is impulse
\(\Delta P\) is change in momentum
The time of motion of the ball is calculated as follows;
\(t = \frac{\Delta P}{F} \\\\t = \frac{0.9 - 0}{0.14} \\\\t = 6.43 \ s\)
Thus, the time spent in the air by the ball at the given momentum is 6.43 s.
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what are the laws of motion
Answers
Answer: Newton’s 1st law- a body at rest will remain at rest, and a body in motion will remain in motion unless acted on by an external force
Newton’s 2nd law- the force acting on an object is equal to the mass of that object times it’s acceleration
News 3rd law- for every action, there is an equal and opposite reaction
Hope this helps!
Explanation:
Description
DescriptionIn classical mechanics, Newton's laws of motion are three laws that describe the relationship between the motion of an object and the forces acting on it. The first law states that an object either remains at rest or continues to move at a constant velocity, unless it is acted upon by an external force.
What does it say about the application of Newtons second law of motion in football
Answers
Answer:
Newton's Second Law of Motion states that a force on an object is equal to the mass of the object multiplied by its acceleration ( F = ma ).
The football then exerts an equal amount of force in the opposite direction on the kicker's foot.
Everything in football that has a mass and acceleration will have a force.
Explanation:
Answer:
The more force applied to the football the more acceleration. Kicking or throwing the ball harder makes it move faster and cover more distance.
Explanation:
Plato/Edmentum
5a. Define Horizontal Gene transfer. 5b. Describe how competence for transformation is regulated in Gram-positive bacteria using each of the following words correctly: CF, cell density, and translocosome. 5c. Is homologous recombination required for this form of HGT? Explain why or why not. 5d. Efficient whole genome sequencing of bacterial genomes has allowed scientists to identify individual genes as well as larger genomic islands that were most likely acquired through Horizontal Gene Transfer. How does the %GC content of a genome allow bioinformatic methods to identify HGT genes within genomes?
Answers
Horizontal Gene Transfer (HGT) is the movement of genetic material between different organisms that are not related through normal reproductive processes.
This process is important in bacterial evolution and can contribute to the acquisition of new genes, traits, and functions.
In Gram-positive bacteria, competence for transformation is regulated by a quorum-sensing mechanism that involves cell density (CF). When the cell density reaches a certain threshold, the bacteria produce and secrete a peptide signal that activates the expression of genes involved in competence. This peptide signal is sensed by a translocosome, which transports DNA into the cell.
Homologous recombination is required for HGT through a transformation in bacteria. This process involves the integration of foreign DNA into the chromosome of the recipient cell by the homologous recombination machinery.
The %GC content of a genome can be used to identify HGT genes within genomes using bioinformatic methods. Genes that were acquired through HGT are often associated with a different %GC content than the rest of the genome. For example, if a genome has a low %GC content, but a particular gene has a high %GC content, this suggests that the gene was acquired through HGT from an organism with a higher %GC content.
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The conductor is initially electrically neutral, and then a charge q is placed at the center of the hollow space. Suppose the conductor initially has a net charge of 7q instead of being neutral. What is the total charge on the interior and on the exterior surface when the q charge is placed at the center
Answers
The total charge on the interior of the conductor is zero.
The total charge on the exterior of the conductor is 8q.
Total charge on the interiorDue to large number of electrons available for conduction in a conductor, most of the electrons moves to surface leaving zero net charge inside the conductor.
Thus, the total charge on the interior of the conductor is zero.
Total charge on the exteriorThe total charge on the exterior of the conductor is calculated as follows;
Q = q + 7q = 8q
Thus, the total charge on the exterior of the conductor is 8q.
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I’m on earth.I have an object with a mass of 15 kg. When I put it on a scale, what will the scale read?
Answers
The scale will read 147N
Explanation:The mass of the object, m = 15 kg
Since I am on the earth, the acceleration due to gravity on the earth is:
g = 9.8 m/s²
The scale will read the weight of the object, and is calculated below
The weight, W = mg
W = 15(9.8)
W = 147 N
Therefore, the scale will read 147N
Light duty ladders have a maximum weight limit of:
A. 200 pounds. B. 300 pounds
C. 400 pounds
Answers
The maximum weight limit for light-duty ladders depends on the specific ladder and its manufacturer's specifications. However, as a general guideline, light-duty ladders usually have a maximum weight limit of around 200 pounds.
It's important to note that exceeding the maximum weight limit of a ladder can be dangerous and may result in accidents or injuries. When using a ladder, it's essential to read and follow the manufacturer's guidelines and weight limits to ensure safe and proper use.
If the user's weight or the weight of the materials being carried exceeds the ladder's maximum weight limit, a heavier-duty ladder should be used instead.
In summary, the maximum weight limit for light-duty ladders is typically around 200 pounds, but it's important to check the manufacturer's specifications for the specific ladder being used.
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which of the following statements about stars is true?; if the sun is white-yellow, which of the following is a reasonable approximation of its temperature?; immediately above the sun's photosphere is the _______, which is the sun's lower atmosphere.; which of the following statements about the sun is true?; which of the following lists stars in order of increasing size?; betelgeuse star
Answers
From around 6500 K at the bottom to 4000 K at the top, the photosphere's temperature changes (11,000 and 6700 degrees F, 6200 and 3700 degrees C). Granulation covers a large portion of the photosphere.
The results of these many techniques indicate that the Sun's surface actually has a temperature of about 5,800 kelvin (9,980 degrees Fahrenheit [5,520 degrees Celsius]). The photosphere contains areas of darkness known as sunspots, where the temperature is comparatively lower—about 3800K. The photosphere is therefore the layer that is the coldest. It is 15 million K inside the sun (27 million degrees Fahrenheit). It is 5780 K at the surface (9900 degrees Fahrenheit).
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