When the primary cosmic rays hit the atmosphere muons, with an
average lifetime of ~2.2 * (10^(-6))s, are created at an altitude
of ~10km . Therefore the minimun time to reach the surface of the
groun
The minimum time it takes for muons created at an altitude of 10 km to reach the surface of the ground is approximately 3.33 × 10⁻⁵ s.
When primary cosmic rays hit the atmosphere, muons are created at an altitude of 10 km.
These muons have an average lifetime of ~2.2 × (10⁻⁶)s.
The minimum time it takes for them to reach the surface of the ground depends on their speed.
The minimum time is the time it takes for the muons to travel from the altitude of 10 km to the surface of the ground.
Therefore, the minimum time is equal to the distance travelled by the muons divided by their speed.
Since muons are created at an altitude of 10 km and the surface of the ground is at an altitude of 0 km, the distance travelled by the muons is 10 km.
The speed of the muons is very close to the speed of light, which is approximately 3 × 10⁸ m/s.
Therefore, the minimum time it takes for the muons to reach the surface of the ground is given by:
minimum time = distance / speed
minimum time = 10 km / (3 × 10⁸ m/s)
minimum time = 3.33 × 10⁻⁵ s
This is the minimum time it takes for the muons to reach the surface of the ground.
It's important to note that some muons may take longer to reach the surface, depending on their initial speed and direction.
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What is the frequency of a wave traveling at 10 m/s with a wavelength of 2 m?
Answer:
5 Hz
Explanation:
Given:
Wave velocity ( v ) = 10 m / sec
wavelength ( λ ) = 2 m
We have to calculate Frequency ( f ) :
We know:
v = λ / t [ f = 1 / t ]
v = λ f
= > f = v / λ
Putting values here we get:
= > f = 10 / 2 Hz
= > f = 5 Hz
Hence, frequency of sound is 5 Hz.
A student attaches a block of mass M to a horizontal spring so that the block-spring system will oscillate if the block-spring system is
released from rest at a horizontal distance D below the system's equilibrium position. The student measures the period of oscillation for
the system to be P. What is the maximum spring potential energy of the system U, in terms of D, M, and P?
As a result, the system's maximum spring potential energy U is given by: U = (2π^2MD^2)/P^2
What is potential energy?Potential energy is the energy stored by an item as a result of its location relative to other objects, internal tensions, electric charge, or other reasons. Potential energy is stored energy that is affected by the relative location of various components in a system. When a spring is squeezed or extended, its potential energy increases. A steel ball has higher potential energy when lifted above ground than when it falls to Earth.
Here,
The maximum spring potential energy U can be calculated using the equation:
U = (1/2)kD^2
where k is the spring constant, which can be found from the period of oscillation using the equation:
k = (4π^2M)/P^2
Substituting the expression for k into the equation for U, we get:
U = (1/2)((4π^2M)/P^2) * D^2
So the maximum spring potential energy U of the system is given by:
U = (2π^2MD^2)/P^2
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Subject- Science
Grade- 6th
please help me with hw. Thank you!
Answer:
b. they get blown in from colder or warmer areas.
Answer:
Option b.
Hope it helps
What do scientists know about the future of the universe?
what dark matter is made of
why the expansion of the universe is accelerating
that stars will eventually burn out causing the universe to become cold and dark
that galaxies spin much slower than they should based on visible matter
Answer:
Gravity will cause a closed universe to collapse back on itself ending in the Big Crunch. scientific predictions about the future of the universe are based on the idea that the effect of gravity on matter determines the shape of the universe which then determines its future
Scientists know about the future of the universe and that stars will eventually burn out causing the universe to become cold and dark. Therefore, option C is correct.
What is the future of the universe?All of the stars and galaxies will ultimately run out of energy as the universe expands, and the universe will cool down, resulting in the "Big Chill." It will take an indefinite amount of time for gravity to stop the universe's expansion if its density is equal to the critical density.
There won't be any other galaxies visible outside of our own. The universe will then actually become cold, dark, and empty once the stars have burned out.
Scientists know about the future of the universe and that stars will eventually burn out causing the universe to become cold and dark. Therefore, option C is correct.
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light of wavelength 530 nm is incident on two slits that are spaced 1.0mm apart . How far from the slits should the screen be placed so that the distance between the m = 0 and m = 1 bright fringes is 1.0 cm?
The screen should be placed 1886.8 mm (or about 1.9 meters) away from the slits in order for the distance between the m = 0 and m = 1 bright fringes to be 1.0 cm.
To solve this problem, we can use the formula for the distance between bright fringes:
y = (mλD) / d
Where y is the distance from the central bright fringe to the mth bright fringe on the screen, λ is the wavelength of the light, D is the distance from the slits to the screen, d is the distance between the two slits, and m is the order of the bright fringe.
We want to find the distance D, given that the distance between the m = 0 and m = 1 bright fringes is 1.0 cm. We know that for m = 0, y = 0, so we can use the formula for m = 1:
1 cm = (1 x 530 nm x D) / 1 mm
Solving for D, we get:
D = (1 cm x 1 mm) / (1 x 530 nm)
D = 1886.8 mm
Therefore, the screen should be placed 1886.8 mm (or about 1.9 meters) away from the slits in order for the distance between the m = 0 and m = 1 bright fringes to be 1.0 cm.
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Suppose of electrons must be transported from one side of an electrochemical cell to another in minutes. Calculate the size of electric current that must flow.
1605 amperes of electric current would need to flow to transport 1 mole of electrons in 1 minute.
To calculate the size of electric current that must flow to transport a given number of electrons, we need to use Faraday's law of electrolysis, which states that the amount of charge (Q) needed to transport a given number of electrons is proportional to the number of electrons (n) and the charge on a single electron (e):
Q = n * e
We can rearrange this equation to solve for the number of electrons:
n = Q / e
To determine the electric current required to transport a given number of electrons in a certain amount of time, we need to use the equation:
I = Q / t
where I is the electric current, Q is the amount of charge, and t is the time.
Using Faraday's law, we can calculate the amount of charge required to transport 1 mole of electrons:
Q = n * e = (6.02 × \(10^{23\)) * (1.6 × \(10^{-19}\)) ≈ 9.63 × \(10^4\) coulombs
Using the equation for electric current, we can calculate the size of the current required to transport this amount of charge in 1 minute:
I = Q / t = (9.63 × \(10^4\)) / 60 ≈ 1605 amperes.
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A 12. 0 cm object is 9. 0 cm from a convex mirror that has a focal length of -4. 5 cm. What is the distance of the image from the mirror? –3 cm –4 cm 3 cm 4 cm.
A mirror equation is an equation that relates object distance and image distance to focal length. The distance of the image from the mirror will be -3 cm.
What is a mirror equation?A mirror equation is an equation that relates object distance and image distance to focal length. It's sometimes referred to as a mirror formula.
\(\rm \frac{1}{v} +\frac{1}{u} =\frac{1}{f} \\\\\)
The given data in the problem is;
f is the focal length = -4. 5 cm
u is the object distance=12. 0 cm
v is the image distance =?
\(\rm \frac{1}{v} +\frac{1}{12.} =\frac{1}{-4.5} \\\\ \rm \frac{1}{v}= \frac{1}{-3} \\\\ \rm v= -3cm\)
Hence the distance of the image from the mirror will be -3 cm.
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1510 3. A body has initial velocity 2 m s¹. After it moves 50 m with a constant acceleration„the velocity becomes 12 m s¹. How long will it take?
Answer:
-1+√251/5 s
Explanation:
The most appropriate equation of motion for this question is; s= ut+(at^2)/2
t=-1+√251/5 s
a crate of fruit with a mass of 39.5 kg and a specific heat capacity of 3650 j/(kg⋅k) slides 8.60 m down a ramp inclined at an angle of 39.1 degrees below the horizontal.a) if the crate was at rest at the top of the incline and has a speed of 2.50m/s at the bottom, how much work was done on the crate by friction?b) if an amount of heat equal to the magnitude of the work done by friction goes into the crate of fruit and the fruit reaches a uniform final temperature, what is its temperature change?
The work done on the crate by friction is 1613.855 J and the temperature change of the crate of fruit is 0.120 K.
What is friction?
Friction is a force that opposes the relative motion or tendency of motion between two surfaces in contact.
Given:
Mass of the crate (m) = 39.5 kg
Specific heat capacity of the crate (c) = 3650 J/(kg·K)
Distance traveled down the ramp (d) = 8.60 m
Angle of the ramp (θ) = 39.1 degrees
Initial speed of the crate (v_initial) = 0 m/s (at rest)
Final speed of the crate (v_final) = 2.50 m/s
a) To find the work done on the crate by friction, we can use the work-energy theorem:
Work done by friction (W_friction) = ΔKE + ΔPE
ΔKE = (1/2) * m * (v_final^2 - v_initial^2)
= (1/2) * (39.5 kg) * ((2.50 m/s)^2 - (0 m/s)^2)
= 309.375 J
ΔPE = m * g * h
= (39.5 kg) * (9.8 m/s^2) * (8.60 m * sin(39.1 degrees))
= 1304.48 J
W_friction = 309.375 J + 1304.48 J
= 1613.855 J
Therefore, the work done on the crate by friction is approximately 1613.855 J.
b) The heat transferred to the crate (Q) is equal to the work done by friction (W_friction), and it can be expressed as:
Q = m * c * ΔT
Where ΔT is the change in temperature.
Rearranging the equation, we can solve for ΔT:
ΔT = Q / (m * c)
= (1613.855 J) / ((39.5 kg) * (3650 J/(kg·K)))
≈ 0.120 K
Therefore, the temperature change of the crate of fruit is approximately 0.120 K.
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examples of different types of energy that are PE
\(\quad \quad\quad \huge \underline{\tt{ANSWER᭄}}\)
\( \quad\quad\quad\quad\)
\( \blue{ \star}\)Magnetic Energy :
Compass Hard disk drives\( \blue{ \star}\)Gravitational Energy :
Writing with pen on paperRipe fruit before it falls\( \blue{ \star}\)Nuclear Energy :
ElectricityNuclear Weapons\( \blue{ \star}\)Thermal energy :
Baking in an ovenA cup of hot chocolateA student bikes 5.00 km East to school in 30.0 min, realizes he forgot his calculator for physics, spends 30.0 min going back going home, and then races back to school in 27.0 minutes.
1.What is the students total distance traveled ?
2. Determine the students average speed ?
3. What is the students total displacement ?
4. Determine the students average velocity ?
Explanation:
Given data
distance = 5km
time taken to travel to school= 30 min
1. the total distance traveled is
from home to school+ school to home+ home back to school
5km+5km+5km= 15 km
2. Determine the students average speed
average speed is the total distance divided by the total time taken
= (5+5+5)/(30+30+27)
= 15/87 km/min
3 What is the student total displacement
the displacement tells how far a place is hence the displacement is 5km (i.e the school is 5km from his home)
4. Determine the students average velocity
a. speed home to school
v= 5/30= 0.166 km/min
b. school back home
v= 5/30= 0.166 km/min
c. speed home to school
v= 5/27= 0.185 km/min
Average velocity = (0.185 + 0.166 + 0.166)/3= 0.517/3= 0.17 km/min
Why is that when a small marble hits another small marble, it moves, but when a small marble hits a bigger marble, it does not?
Answer:
It depends on the masses of the marbles that collide. The figure shows a marble with a smaller mass hitting a marble with a larger mass. The larger marble is at rest. After the collision, the marble with a smaller mass bounces off in the opposite directions
hope this helps :)
A 1400 kg car is traveling at a rate of speed of 32 m/s for 2 hours. For the remaining 3 hours of the trip the car travels at an average rate of speed of 38 m/s. What was the average change in momentum?
The average change in momentum for the car during the trip is 8400 kg·m/s.
What is Momentum?
Momentum is a vector quantity, meaning it has both magnitude and direction. The direction of momentum is the same as the direction of velocity, and its magnitude is proportional to both the mass and the velocity of the object.
Then, we calculate the final momentum of the car during the remaining 3 hours:
Final momentum during the remaining 3 hours = mass × final velocity during the remaining 3 hours = m × v2
Now, we can calculate the average change in momentum:
Average change in momentum = Final momentum - Initial momentum
= (Final momentum during the first 2 hours + Final momentum during the remaining 3 hours) - Initial momentum
= [(m × v2) + (m × v2)] - (m × v1)
= 2m × v2 - m × v1
Plugging in the given values:
Mass of the car (m) = 1400 kg
Initial velocity (v1) = 32 m/s
Final velocity during the first 2 hours (v2) = 38 m/s
Average change in momentum = 2m × v2 - m × v1
= 2 × 1400 kg × 38 m/s - 1400 kg × 32 m/s
= 53200 kg·m/s - 44800 kg·m/s
= 8400 kg·m/s
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_____ is a conclusion formed from indirect evidence
Answer:
I believe its inference
Explanation:
Developing an action plan is part of which of the seven health skills? O advocacy O communicating O setting goals O making decisions
Developing an action plan is part of making decisions on the seven health skills, which are fundamental in healthcare.
What are the seven health skills?The seven health skills can be defined as different aptitudes required to set healthcare decisions.
These health skills include:
Advocacy Assessing Influences/Resources.Communication.Decision Making.Setting objectives
In conclusion, developing an action plan is part of making decisions on the seven health skills, which are fundamental in healthcare.
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Examine the Pythagorean theorem below. In this form you can find the length of the hypotenuse c) of a right triangle if you know the lengths of the two short sides (a &). Solve this equation for the short side b. If you need to indicate a square root in your answer, type it like this: root * (e + f) to mean the square root of the sum (e + f) . For example, the equation below can be typed as c = root (a^ ^ 2+b^ ^ 2)
Answer:
what is the number
Explanation:
PLEASE HELP
While standing Fernando's feet contact the ground with an area of 0.08. While laying on the ground, his body contacts the ground with an area of 0.6. If Fernando's body has a mass of 75 kg, how much more pressure does he exert while standing compared to laying down? Use the conversion factor of 1 kg = 10 N. Round your answer to the nearest whole number.
There is ______ Pa of difference.
Answer:
8125 Pa
Explanation:
Pressure exerted= Force/ area of contact
we calculate the force he is excerting = mg
= 75 X 10
= 750N
Pressure exerted while standing= 750/0.08
= 9375 Pa
pressure exerted while laying down = 750/0.6
= 1250 Pa
the difference in pressure= 9375 - 1250
= 8125 Pa.
You are gardening in the peak of summer, it hasn't rained in a week, and your plants are looking rough. You decide to water the plants for an hour. The next day you come back to the garden, and the plants look in worse shape than they did previously, as if none of that water made it to the plant. With what you know from class, please try and explain what is happening to your plants.
In the peak of summer, it hasn't rained in a week, and the plants are looking rough, so watering the plants for an hour is a good idea.
However, the next day, you come back to the garden, and the plants look in worse shape than they did previously, as if none of that water made it to the plant. Plants absorb water through their roots. The root system of a plant is responsible for drawing water and nutrients from the soil. A plant's root system must be able to absorb water quickly in order for the plant to grow and thrive. When the soil around the root system is dry, the roots will stop growing and will not be able to absorb water.
It may even start to die. Watering plants during the peak of summer is important because it will help keep the soil moist and prevent the roots from drying out. However, watering a plant too much can be harmful. If a plant is overwatered, the water may not be able to penetrate the soil and reach the roots. Instead, it may just sit on top of the soil, causing the roots to rot and die. This can cause the plant to wilt and die.To summarize, if the soil around the plant is too dry, the roots may not be able to absorb the water you gave them, causing the plant to look worse than before. Conversely, overwatering can also be harmful because the water may not be able to penetrate the soil and reach the roots, causing the roots to rot and die.
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I am going to build a boat. My partner says I cannot put a refrigerator and a television in my boat because that would make it too heavy-and the boat might sink. Then we would be swimming with the sharks!!!!
What would you advise me to tell my friend? Is she right or wrong?
please help me...ill give out brainlyest
Answer:
In mine I said to build the boat accordingly based on what is going to be in it
Explanation:
just remember the density of the boat cannot change but the volume and the mass can
The ratio of the potential difference across a conductor to the current in the conductor is called
A) conductivity
B) resistance
C) charge
D) power
Answer:
The ratio of the potential difference across a metallic conductor to the current in the conductor is known as.
B. Resistance.
Explanation:
According to ohms law " the current passing through a conductor is directly proportional to the potential difference between the ends provided the temperature of the wire remains constant".
What is resistance ?
Resistance is a measure of the opposition to current flow in an electrical circuit
what is a resistor ?
a resistor is a n electric conductor which forms resistance to free flow of electric current, the resistance is measured in Ω
The ratio of the potential difference across the conductor to the current is called resistance
What is Resistance?It is defined as the ratio of the potential difference across the conductor to the current. The resistance is measured in Ω.
\(R = \dfrac VI\)
Where,
\(R\) - resistance
\(V\)- voltage (Potential difference)
\(I\) - current
Therefore, the ratio of the potential difference across the conductor to the current is called resistance.
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As you travel up into the mountains of the troposphere, increasing elevation,
the air pressure...
Oa. Decreases because the air gets more dense
O b. Decreases because the air gets less dense
Oc. Increases because the air gets more dense
Od. Increases because the air gets less dense
Answer:
OA
Explanation:
A block of aluminum has a volume of 15.0 ml and a mass of 50.5 g. the density is ___________. group of answer choices
A block of aluminum has a volume of 15.0 ml and a mass of 50.5 g. the density is: 3.36 g/ml
To solve this problem the density formula and the procedure that we have to use is:
d = m/v
Where:
v= volumed= densitym= massInformation about the problem:
v= 15.0 mlm= 50.5 gd = ?Applying the density formula we get:
d = m/v
d = 50.5 g/15.0 ml
d= 3.36 g/ml
What is density?It is a physical quantity that expresses the ratio of the body mass to the volume it occupies.
What is volume?
It is the space occupied by a body, it is calculated by multiplying its dimensions, for example: length, height and width.
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how much tension must a rope withstand if it is used to accelerate a 3074 kg car vertically down at 9.1 m/s^2 .
Tension must a rope withstand is 2.182kN
Tension is described stress transmitted axially by a cord, rope, chain, or similar object, or through the ends of a rod, truss, or similar three-dimensional object. Stresses can also be described as pairs of acting and reaction forces acting at each end of the element. Tension may be the opposite of compression. At the atomic level, a restoring force can create what is called stress when atoms or molecules are pulled apart and gain potential energy while the restoring force is still present. An end of a cord or rod under such tension can pull on the object to which it is attached to return the cord or rod to its relaxed length.
Solution:
Assuming only tension and gravity act on the car,
T+mg=ma
T=m(g+a)
=3074*(9.81 - 9.1) N
=2.182 kN which is the tension the rope must withstand.
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What is the change of GPE for a 8.0 kg object which is lowered from an initial height of 10 m above the floor to a final height of 4.0 m above the floor?
The change in gravitational potential energy, GPE for the 8 Kg object which is lowered from a height of 10 m to 4 m is -470.4 J
How do I determine the change in potential energy of the object?We'll begin by obtaining the initial potential energy. Details below:
Mass of object (m) = 8 KgInitial height (h₁) = 10 mAcceleration due to gravity (g) = 9.8 m/s² Initial potential energy (PE₁) = ?PE₁ = mgh₁
PE = 8 × 9.8 × 10
PE = 784 J
Next, we shall determine the final potential energy. Details below:
Mass of object (m) = 8 KgInitial height (h₂) = 4 mAcceleration due to gravity (g) = 9.8 m/s² Final potential energy (PE₂) = ?PE₂ = mgh₂
PE = 8 × 9.8 × 4
PE = 313.6 J
Finally, we shall determine the change in the potential energy. This is shown below:
Initial potential energy (PE₁) = 784 JFinal potential energy (PE₂) = 313.6 JChange in potential energy (ΔPE) =?ΔPE = PE₂ - PE₁
ΔPE = 784 - 313.6
ΔPE = -470.4 J
Thus, the change in potential energy is -470.4 J
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An automobile was moving at 15 m/s and accelerated at 2 m/s2 for 10 s. Which of the following
was its final speed?
Answer:
35 m/s
Explanation:
i know all
If a wheel has a radius of 0.26m, how far does it go after 5 rotations
The distance wheel goes about 1.3m after 5 rotations.
What is distance called?Distance is a measurement of how far away two things or locations are, either numerically or occasionally qualitatively. Distance can refer to a physical length in physics or to an estimate based on other factors in common use.A scalar number known as distance measures "how much ground an item has traversed" while moving. An object's total change in position is referred to as displacement, a vector variable that measures "how far out of place an item is."The Distance Formula itself is actually derived from the Pythagorean Theorem which is a 2 + b 2 = c 2 {a^2} + {b^2} = {c^2} a2+b2=c2 where c is the longest side of a right triangle (also known as the hypotenuse) and a and b are the other shorter sides (known as the legs of a right triangle).
Given data :
radius = 0.26 m
rotation = 5
Distance = 0.26 x 5 = 1.3 m
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a car is travelig at 20.0 m/s when the driver applies the brakes and comes to a stop. if the car slows down uniformly with an acceleration of -4.20 m/s, about how far does the car travel before coming to a rest
Since acceleration is constant, we can use the formula
v² - u² = 2a ∆x
where v = final velocity, u = initial velocity, a = acceleration, and ∆x = displacement. Then
0² - (20.0 m/s)² = 2 (-4.20 m/s²) ∆x
⇒ ∆x = (20.0 m/s)² / (8.40 m/s²) ≈ 47.6 m
Questions
1. From your data, what factor(s) affect the speed of a wave? Explain your reasoning.
2. The pitch made by a musical instrument is dependent on the frequency of the wave. Frequency is the inverse of period. What impact do you think the frequency of a wave has on the wave speed?
3. What happens to wave speed as it moves from a medium of low density to one of high density? Explain your response with respect to this lab.
4. When a stringed instrument is out of tune, the player with tighten or loosen the string. If the instrument is initially flat, should they tighten or loosen the string? In the context of this experiment, explain your reasoning.
Present Your Findings or Questions
Using data and observations, answer the questions and provide your data tables in the essay box below.
Answer:
Initial velocity describes how fast an object travels when gravity first applies force on the object. On the other hand, the final velocity is a vector quantity that measures the speed and direction of a moving body after it has reached its maximum acceleration.
Explanation:
Answer:
1. The speed of the wave is affected by wavelength frequency because waves travel through a medium and sound, ocean waves and seismic waves, etc. are the physical properties of the medium that determines the speed of the mechanical waves.
2. I think the frequency of the wave doesn't have any effect on the wave speed. Only the characteristics of the medium the wave is traveling through determines its speed.
3. As a wave moves from a medium of low density to a higher density the wave speed increases and when a wave moves from a higher density to a medium density the wave speed decreases because the wave length shortens causing the wave speed to lower.
4.If the instrument is initially flat they should tighten it because once it is tightened there is going to be force applied to the gears, and after you've reached the correct pitch the gears won't be able to move. So ultimately, you will be able to meet the intended pitch you were going for.
HEY CAN ANYONE PLS ANSWER THESE QUESTION!!!!!
1. A model can come in many shapes, sizes, and styles.
✅
2. Models can help scientists communicate their ideas, understand processes, and make predictions.
✅
3. Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons.
✅
4. The plum pudding model has electrons surrounded by a volume of positive charge
✅
5. Electrons are kept in the orbit around the nucleus by the electromagnetic force.
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