two objects are thrown from the top of a tall building. one is thrown up, and the other is thrown down, both with the same initial speed. what are their speeds when they hit the street? neglect air resistance.

Answer: So the answer is (A) -1.11 m/s^2.

Explanation: To solve this problem, we need to use the formula for average acceleration, which is given by:

a = (vf - vi) / t

Where a is the acceleration, vf is the final velocity, vi is the initial velocity, and t is the time.

Plugging in the values given in the problem, we get:

a = (20 m/s - 120 m/s) / (1.5 minutes * 60 seconds/minute) = -100 m/s / 90 seconds = -1.11 m/s^2

So the answer is (A) -1.11 m/s^2.

The Fraunhofer process is typically simpler to study even though they are physically the same processes and have distinct features. Fresnel diffraction, players who are near to one another, and non-parallel light rays

Participants in the Fraunhofer diffraction are far apart, and the light beams are parallel.

When plane waves are incident on a diffracting object and the diffraction pattern is observed far enough away from the object (a distance satisfying Fraunhofer condition) (in the far-field region), as well as when it is observed at the focal plane of an imaging lens, the Fraunhofer diffraction equation is used to model the diffraction of waves in optics. The Fresnel diffraction equation, on the other hand, predicts the diffraction pattern that is produced close to the diffracting object (in the near field area).

Although Joseph von Fraunhofer was not directly engaged in the formulation of the theory, the equation bears his name.

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The maximum distance from mercury to the sun is 0.58 * 10⁸ km.

The minimum distance b/n them is 0.46 * 10⁸ km.

The shape of an elliptical orbit can be described by its eccentricity, which is a measure of how "flattened" the ellipse is. An eccentricity of 0 indicates a circular orbit, while an eccentricity of 1 indicates a parabolic orbit.

In the case of Mercury's orbit, the eccentricity is given as 0.206, which means that the orbit is slightly flattened, but still close to circular. The length of the major axis of the ellipse is given as 1.16 * 10⁸ km.

To find the maximum distance from Mercury to the sun (also known as the aphelion), we need to find the distance from the center of the ellipse to the farthest point on the ellipse (which is at the top of the major axis). This distance is equal to half of the length of the major axis. Thus, the maximum distance from Mercury to the sun is:

1.16 * 10⁸ km / 2 =0.58 * 10⁸ km

To find the minimum distance between Mercury and the sun (also known as the perihelion), we need to find the distance from the center of the ellipse to the closest point on the ellipse (which is at the bottom of the major axis). This distance is equal to half of the length of the major axis times the square root of 1 - (eccentricity)². Thus, the minimum distance between Mercury and the sun is:

[tex](1.16 x 10^8 km / 2) * \sqrt{(1 - (0.206)^2) } = 0.46 * 10^8 km[/tex]

Therefore, Note that the sun is located at one of the foci of the elliptical orbit, rather than at the center. However, since the eccentricity of Mercury's orbit is relatively small (0.206), the distance from the center of the ellipse to either focus is very close to the distance from the center to the top or bottom of the major axis, and the difference can be ignored for most purposes.

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a) Angular frequency is  12.75 rad/s b)  The wave number is 33.59m c)

y ( x ,t) = 2.34  x  sin(33.59 x - 12.75t)

Given,

wavelength = λ = 18.7 cm

                   = 0.187 m

amplitude , A = 2.34 cm

v = 0.38 m/s

A) angular frequency = ?

f = v/λ

f = 0.38/1.87 = 2.03

angular frequency ,

ω = 2π f

ω = 2π x 2.03

ω = 12.75 rad/s

B) the wave number,

K = 2π/λ = 33.59m

c) as the wave is propagating in -x direction, the sign is positive between x and t

y ( x ,t) = A sin(k  x - ω t)

y ( x ,t) = 2.34  x  sin(33.59 x - 12.75t)

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In a proton density image the tissue magnetization, RF signal intensity, and image brightness are.

Proton Mail is the world's largest cozy e-mail provider. It gives end-to-cease encryption and plenty of different splendid safety capabilities to maintain your communications non-public. Even the company hosting your emails has no manner of reading them, so you can rest confident that they cannot be studied via third events either.

It has a completely, very wealthy internal shape. you could have heard that protons are made up of 3 smaller basic particles known as quarks, two united states, and one down quark to be particular, but it is only the top of the particle iceberg, as proton researcher Paul Reimer explains.

One or extra protons are present in the nucleus of every atom. They provide the attractive electrostatic crucial force which binds the atomic electrons. The quantity of protons in the nucleus is the defining belongings of an element and is referred to as the atomic quantity.

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According to the question, two identical waves undergo pure constructive interference, resultant intensity is quadruple individual wave intensity.

When two or even more sound waves are present at once from distinct sources, they interact with one another to create a new wave. The combination of all previous waves results in the new wave. Interference is the term for wave interaction.

The reflecting light from an oil coating floating on water is one of the best illustrations of interference. Another illustration is the thin coating of a soap bubble (shown in Figure 1), which, when illuminated by either natural or synthetic light sources, reflects a variety of lovely colors.

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The spring constant of the spring is 7.497 N/m.

The given parameters;

mass of the block, m = 0.482 kg

extension of the spring, x = 0.630 m

additional extension, = 0.338 m

The spring constant of the spring is calculated as follow

F = mg

Kx = mg

K = mg/x

K = 0.482 × 9.8 / 0.630 = 7.497N/m

F = -kx.

The spring constant, or k, is the proportional constant. It is a gauge of the spring's rigidity. A spring exerts a force F = -kx in the direction of its equilibrium position when it is stretched or compressed to a length that deviates by an amount x from its equilibrium length. The spring constant is calculated by dividing the force required to extend or compress a spring by the length it goes up or down. It is used to assess the stability or instability of a spring, The spring's stiffness is quantified by the spring constant, or k. For various springs and materials, it differs. The stiffer the spring is and the harder it is to stretch, the greater the spring constant.

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If the current i(t) in the circuit at time t after the switch is closed  in terms of q0 , l , c the differential equation will be V(t) = (q0/C) × e^(−t/RC )

The equation for V(t) would be V(t)=E(RC)(dV(t)/dt) if a battery with EMF E was present in the circuit. With respect to V(t), this differential equation is no longer homogenous. But it can be resolved by simply substituting Vb(t)=V(t)E. This substitution has the effect of removing the E term and producing an equation for Vb(t) that is the same as the equation you solved for V(t). When a battery is supplied, the capacitor's initial condition is typically that it is completely discharged at time t=0.

In these circumstances, the solution will appear as V(t)=E(1et/(RC)) Since the voltage across the capacitor is zero at time t=0 according to this solution, is 0 at time t=0 since the capacitor wasn't charged at that point, and it climbs asymptotically to E.

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Answer: Fn = 450 N

Explanation:

Part of the tension acts in the upward y-direction, reducing the normal force.

ΣFy = Fn + Ftsin(30)-Fg

0 = Fn + (300 N)sin(30) - (60 kg)(10 m/s^2)

0 = Fn + 150 N - 600 N

0 = Fn - 450 N

Fn = 450 N

Answer:

When two objects collide, the forces that are exerted on each other are determined by their masses and speeds. If the mass of one of the objects is increased, the force that it exerts on the other object during the collision will also increase. Similarly, if the speed of one of the objects is increased, the force that it exerts on the other object during the collision will also increase. In general, the greater the mass and speed of an object, the greater the force that it will exert on another object during a collision. However, it is important to note that the direction of the forces will remain the same, regardless of the masses or speeds of the objects involved.

From Paris to Qatar for the world cup, two French riders traveled by bicycle. In three months, 7,000 kilometers overall.

The Fédération Internationale de Football Association (FIFA), the world's governing organization of association football, and its senior men's national teams compete in the FIFA World Cup, commonly referred to as the World Cup. With the exception of 1942 and 1946, when it was postponed due to World War II, the tournament has been conducted every four years since its inception in 1930. The current winners are France, who captured their second championship during the 2018 competition in Russia.

The structure uses a qualification round to choose the teams that advance to the tournament phase, which occurs over the previous three years. 32 teams fight for the title at sites in the host country or nations during the tournament round.

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According to the question if the secondary coil of transformer has 500 turns, the secondary voltage is 1000 V.

Transformers for power, transformers for distribution, and transformers for isolation, in that sequence. We have Dual Winding Transformer and Autotransformers based on windings. We offer Core Type Transformers, Shell Type Transformers, and Berry Type Transformers based on core designs.

For an ideal transformer

Vs/Vp=Ns/Np

Given that primary voltage V =100 V

Number of turns in primary N = 50 turns

Number of turns in srcondary Ns = 500 turns

Therefore

Vs/100=500/50

Hence voltage across secondary Vs = 1000 V

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1.75 m/s2 is the crate's acceleration.

mass=25kg, f=20n.

A surface is said to be frictionless if it has a force acting on any thing that is practically zero or insignificant, meaning that there is no resistance between the surface and the material, allowing the object to slide and move freely without any friction.

Every every activity that requires the interaction of two surfaces and motion involves friction, with the exception of space walks, which you may conduct without any resistance. Because there won't be any contact force to propel the individual forward, one cannot walk in the absence of friction.

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The final RPM of ice skater is 116.38.

RPM's meaning?  per revolution

RPM, which stands for revolutions per minute, is a measure of how quickly a machine is operating at any one time. RPM is a measure used in automobiles to indicate how often the crankshaft completes one full rotation each minute as well as how frequently each piston rises and falls in its cylinder.

Briefing:

ω₀ = 6.2π rad/s

α= 10π rad/s

t = 4.2 s

Find: ω

ω = αt + ω₀

ω  = 10 (0.6 s) + 6.2π rad/s

ω =  116.38RPM

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The Young's Modulus of the wire of length 50 cm is 4.0×10⁵ N/m.

Young's modulus is a measure of the ability of a material to withstand changes in length when under lengthwise tension or compression.

To calculate the young's modulus of the wire, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the Young's Modulus is 4.0×10⁵ N/m.

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The intensity of sound in decibels at 10 m is 17.6 dB.

The intensity of sound in decibels at 100 m is 14.08 dB.

The formula to calculate intensity when power is given is I = P/A

where, I is the intensity

P is the power

A is the area

Given, P = 20 W

A₁ = 4πr² = 4π* 10² = 1256.64 m²

A₂ = 4πr² = 4π* 100² =125663.71 m²

I₁ = P / A₁ = 20/1256.64 = 0.0159 W/m²

I₂ = P / A₂ = 20/125663.71 = 0.000159 W/m²

The expression between intensity of sound and decibel level is

dB = 10* log (I/ 1.0* 10⁻¹² W/m²) --------(1)

Substituting the values of I₁ and I₂ in (1),

dB₁ = 10* log (1.5* 10⁻²/ 1.0* 10⁻¹²) =  10* log(1.5* 10¹⁰) = 10* [ log 1.5 + 10] = 10*(0.176* 10) = 17.6 dB

dB₂ = 10* log (1.5* 10⁻⁴/ 1.0* 10⁻¹²) = 10* log(1.5* 10⁸) = 10* [ log 1.5 + 8 ] = 10*(0.176* 8) = 14.08 dB

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Whenever the ground is hit with enough force to crack or break, an earthquake results. Tectonic plate boundaries are linked to the majority of earthquakes.

An earthquake is a quick movement of geological materials beneath the earth's surface that causes the ground to shake violently or weakly. The tectonic plate boundary is where the earthquakes start.

The earthquake is the sudden energy released from the earth's crust that causes the earth's surface to shake. Seismic waves, also called S waves, are consequently produced. The type and severity of an earthquake are based on the local seismic activity.

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The resistance of a conductor that carries a current of 120 amperes when the potential difference between its ends is 240 volts = 2 Ω

Electrical resistance is the force that opposes the flow of current, it's a component that can reduce the speed and quantity of the flow of electrons in an electric circuit.

The formula for electrical resistance can be seen to have several components, namely R is the resistance (Ω), V is the voltage (V), and I is the current strength (A).

The equation:

R = V/I

We have,

Current strength = 120 A

The potential difference between its ends  = 240 V

So, the resistance of a conductor that carries a current of 120 amperes when the potential difference between its ends is 240 volts:

R = 240 V / 120 A

= 2 Ω

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The center of gravity of the man doing the classic yoga poses will be as shown in first figure.

The Center of Gravity is the theoretical point in the body where the body's total weight is expected to exert force. It is important to know the center of gravity because it predicts the behavior of a body's movement when obeying gravity. It is also used in the construction of static structures such as buildings and bridges.

In a modern gravitational field, the center of gravity is identical to the center of mass. However, the two concepts do not always coincide. For the moon, the center of mass is very close to its geometric center. However, its center of gravity is slightly lower than Earth's due to the strong gravitational force of the nearby moon.

In a symmetrically shaped object made of homogenous materials, the center of gravity will match the body's geometric location. However, an asymmetrical object consisting of many components with different dimensions will have its center of gravity at some distance from its geometric center. In the hollow body or irregularly shaped body, the center of gravity in a point outside the body material.

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With the sign in front of you, you are waiting in short formation for an intersection taxiing on runway 8. In order to depart from runway 8, you should turn left as you enter the runway.

In contrast to towing or pushback, where the aircraft is moved by a tug, taxing (sometimes written taxying) is the movement of an aircraft on the ground under its own power. Although the name refers to vehicles with wheels most often, it also covers vehicles with skis or floats.

Taxiways are used by airplanes to go between locations on an airport, such as from a hangar to the runway. The takeoff roll and landing rollout, which are the accelerating run and descending run along a runway, respectively, before takeoff and landing, respectively, are not referred to as "taxiing."

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The weight of the car on the 12 degree slope is 546.72 lbs. This weight is important to know for various reasons, such as calculating the amount of force and energy required to move the car up the hill.

The weight of a car on a 12 degree slope can be calculated using the formula:

Weight = Force * sin(Slope Angle)

Therefore, the weight of the car on the 12 degree slope can be calculated as follows:

Weight = 650 lbs * sin(12°)

Weight = 546.72 lbs

The weight of a car on a 12 degree slope is important to know for various reasons. For example, if the car is being driven up the slope, it is important to know the weight of the vehicle to ensure that it will be able to make it up the hill. Additionally, knowing the weight of the car on the slope can help engineers and designers to calculate the amount of force and energy required to move the car up the hill.

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The total mass of the protons and neutrons in a potassium-39 nucleus is 6.5307 x 10^-26 kilograms.

The mass of a potassium-39 nucleus can be calculated based on the total mass of its protons and neutrons. Potassium-39 is a stable isotope of potassium with 19 protons and 20 neutrons in its nucleus. The mass of a proton is approximately 1.6726 x 10^-27 kilograms, and the mass of a neutron is approximately 1.6749 x 10^-27 kilograms.

Therefore, the total mass of the protons in a potassium-39 nucleus is 19 x 1.6726 x 10^-27 = 3.18094 x 10^-26 kilograms. The total mass of the neutrons in a potassium-39 nucleus is 20 x 1.6749 x 10^-27 = 3.3498 x 10^-26 kilograms.

The total mass of the protons and neutrons in a potassium-39 nucleus is therefore 3.18094 x 10^-26 + 3.3498 x 10^-26 = 6.5307 x 10^-26 kilograms. This is the expected mass of a potassium-39 nucleus, based on the total mass of its protons and neutrons.

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If you placed 1.00 coulomb (C) of positive charge on the Earth and 1 C of negative charge 384,500 km away on the Moon, the positive charge on the Earth would experience a gravitational force of attraction towards the negative charge on the Moon.

The gravitational force of attraction between two charged particles is given by the formula:

where F is the gravitational force, k is the Coulomb constant, q1 and q2 are the charges of the two particles, and r is the distance between them.

Plugging in the values provided, we get:

F = (8.99 x 10^9 N*m^2/C^2) * (1 C) * (1 C) / (384,500 km)^2

= 2.34 x 10^-9 N.

This is a very small force due to the large distance between the two charges and the relatively small magnitude of their charges.

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If we assume at time instance t= 0, then the same thing happens. initial velocity is equal to final velocity

During a free fall, only the gravitational force acts on a body. The initial velocity of the body is zero during free fall.

Vertical motion is symmetrical - the distance and time are the same in the rise as in the fall; the final velocity will have the same magnitude as the initial velocity but in the opposite direction. Horizontal components will never be effected by gravity; it is constant velocity motion

The average velocity is the ratio of the total distance traveled to the total time taken. This can happen in two cases, first if the initial velocity and the final velocity are equal to the average velocity and there is no change in the velocity for the entire trip

Velocity is the measure of the amount of distance an object covers in a given amount of time. Here's a word equation that expresses the relationship between distance, velocity and time: Velocity equals distance travelled divided by the time it takes to get there.

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A graphical presentation that uses vertical bars to display the magnitude of quantitative data is known as a Column chart.

Column charts make use of vertical bars to compare several objects or categories. On one axis are the comparison categories, while on the other are the data values. They are helpful in illuminating the conditions at a specific time. Anything that can be counted, such the volume of items sold or website hits, can be represented in a column chart.

Using column charts, you may show how various numbers differ from one another. When there are significant differences in the data values, column charts—which are used to compare changes between groups over time—are easiest to understand.

If there are several categories to compare, a line graph could be easier to comprehend.

Column charts can be created using standard, stacked, or percentage forms. It is simpler to compare and identify trends in the data because the same data is presented in each format in a different way. The steps for creating conventional, stacked, and percentages charts are the same regardless of the outcome.

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Fnorm = 58.8 N; Fnorm = 58.8 N; Fapp = 15 N; Fnet = 0 N. In the case of constant velocity, a = 0 m/s/s and Fnet = 0 N, Fgrav = m • g • 9.8 m/s/s • 6 kg • 58.8 N Ffrict = Fapp = 15 N since there is no horizontal acceleration.

A book is moved across a desk with a rightward acceleration by applying a rightward push to it. Consider the effects of friction. Pass over air resistance. Static Friction = Normal Force x Static Friction Coefficient is the formula for calculating static friction.

Newton's second law of motion provides the definition of the force formula: An object's force is equal to its mass times its acceleration. F = m ⨉ a. To apply this formula, you must use SI units for force (newtons), mass (kilograms), and acceleration (meters per second squared).

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The fragments reaction is 7.59 MeV/nucleon and  8.39 MeV/nucleon

What is nucleus ?

Neutrons and protons, which have opposite electric charges, make up atomic nuclei. The strongest basic force now understood, known as the strong force, is what holds these things together. A normal atom's nucleus generally holds more than 99.9% of the atom's mass yet takes up considerably less than.01 percent of its volume.

What is fission ?

When a neutron collides with a bigger atom, it excites it and causes it to split into two smaller atoms, which are known as fission products. This process is known as fission. A chain reaction might start as a result of additional neutrons that are also emitted. Huge amounts of energy are produced during the splitting of each atom.

1) m_proton + m_netron + m_electron - m_U

= 92*1.007276466812 + 92*5.4857990943e-4 + 143*1.008664916 - (235.0439299)

= 1.9151 u

= 931.494061 * 1.9151 MeV

= 1784 MeV

= 1784/235 = 7.59 MeV/nucleon

2) m_proton + m_netron + m_electron - m_Cs

= 55*1.007276466812 + 55*5.4857990943e-4 + 82*1.008664916 - (136.9070895)

= 1.2338 u

= 931.494061 * 1.2338 MeV

= 1149 MeV

= 1145/137 = 8.39 MeV/nucleon

Therefore, the fragments reaction is 7.59 MeV/nucleon and  8.39 MeV/nucleon.

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The bug's maximal kinetic energy changes as 16 times of Kinetic energy before amplitude increases when the amplitude approaches 0.20 mm.

The amplitude of a wave is its largest displacement. The wave's greatest velocity is now expressed as its amplitude, which is: v =Aw= K/M.

Now, the square of the wave is directly proportional to the kinetic energy of a system. As a result, the wave's maximum kinetic energy is given by KE = k/2A^2, which means that

KE1/KE2 = A1^2/A2^2 where KE1 is the kinetic energy prior to the amplitude (A1) increasing and KE2 is the kinetic energy following the amplitude increasing (A2)

Due to that,

The bug's entire vertical journey was S = 0.10m

The wave's amplitude is equal to half of the whole distance from the top to the bottom, hence its value is (A) = S/2 = 0.1/2 = 0.05m.

Now that the wave's amplitude has increased to 0.20 m, KEA = KE1/KE2 = A1^2/A2^2

KE1/KE2 = (0.05)^2/(0.20)^2, which equals 0.0025/0.04 = 0.0625.

KE2 then equals 16KE1

Therefore, the largest change in kinetic energy is (KE2) = 16KE1.

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Find complete question:  A bug on the surface of a pond is observed to move up and down a total vertical distance of 0.10 m, lowest to the highest point, as a wave passes. What is the amplitude of the wave? If the amplitude increases to 0.20 m, by what factor does the bug's maximum kinetic energy change?

The angular acceleration is 0.01533rad/s.

We are given that,

Radius = r = 27.0cm

Speed = v = 11.2 m/s

Time = t = 24.0 s

Therefore , We shall first find the linear acceleration before calculating the angular acceleration from one of the linear motion kinematics equations and the initial velocity u will be 0.

v = u + at

a = v/t

a = (11.2m/s)/(27.0×10⁻²m)

a = 0.414 ×10⁻²m/s²

Now , calculating the angular acceleration,

a = α × r

α = a/r

α =  (0.414 ×10⁻²m/s²)/(27.0×10⁻²m)

α = 0.01533rad/s

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If you replace a 100-watt  light bulb with a 25-watt compact fluorescent bulb, over a 10,000 hr life, you will save electricity bill of  $112,5

A fluorescent bulb is more energy efficient than an incandescent bulb. It produces the same amount of light with less electricity.

The energy used by the bulbs is often expressed in Kwh or kilowatt-hour.

The formula is:

Kilowatt-hours = power (in kilowatt) x time usage (in hours)

In the given problem:

Time usage = 10,000 hours

Light bulb:

Power = 100 watt = 0.1 kw

kwh = 0.1 x 10,000 = 1,000 kwh

electricity bill = 1000 kwh x $0.15/kwh = $150

fluorescent bulb

Power = 25 watt = 0.025 kw

kwh = 0.025 x 10,000 = 250 kwh

electricity bill = 250 kwh x $0.15/kwh = $37,5

Money save =  $150 - $37,5 = $112,5

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