match the type of interaction between matter and radiant energy in the atmosphere to its description. instructions transmission transmission drop zone empty. reflection reflection drop zone empty. absorption absorption drop zone empty. scattering scattering drop zone empty. energy bounces off the surface of an object. an object retains some of the energy that strikes it. energy is dispersed in various directions. energy is able to pass though the matter.

The kinetic friction force exerted on an object can vary between zero to a maximum value, is independent of the speed of the object, and is proportional to the normal force exerted on the object. Additionally, it always has a direction opposite to the direction of motion.

The kinetic friction force exerted on an object can vary between zero to a maximum value and is always has a direction opposite to the direction of motion. It is inversely proportional to the normal force exerted on the object, meaning that as the normal force decreases, the kinetic friction force decreases as well. However, the kinetic friction force is independent of the speed of the object, meaning that it does not change as the object's speed changes. Finally, the kinetic friction force is proportional to the normal force exerted on the object, meaning that as the normal force increases, the kinetic friction force also increases.

Learn more about kinetic friction force: https://brainly.com/question/30280206

#SPJ11

1. The new volume of the piston will be 100 mL

2. The new volume of the gas will be 237 mL

1. The new volume of the piston can be obtained as shown below:

P₁V₁ = P₂V₂

1 × 500 = 5 × V₂

500 = 5 × V₂

Divide both side by 5

V₂ = 500 / 5

New volume = 100 mL

2. The new volume of the gas can be obtained as shown below:

P₁V₁ = P₂V₂

89 × 500 = 188 × V₂

44500 = 188 × V₂

Divide both side by 188

V₂ = 44500 / 188

New volume = 237 mL

Learn more about volume:

https://brainly.com/question/14560487

#SPJ1

To find the magnitude of the tangential acceleration of a bug on the rim of a 13.0-inch-diameter disk, we can use the following formula:

tangential acceleration (a_t) = radius (r) × angular acceleration (α)

First, we need to convert the diameter to radius and convert inches to meters:

r = (13.0 in / 2) × 0.0254 m/in ≈ 0.1651 m

Next, we need to find the angular acceleration (α). To do this, we can use the formula:

α = (final angular velocity (ω_f) - initial angular velocity (ω_i)) / time (t)

First, convert the final angular speed from rev/min to rad/s:

ω_f = 80.0 rev/min × (2π rad/rev) × (1 min/60 s) ≈ 8.3776 rad/s

Since the disk starts from rest, ω_i = 0. Now, we can calculate α:

α = (8.3776 rad/s - 0 rad/s) / 3.60 s ≈ 2.3271 rad/s²

Finally, we can find the tangential acceleration:

a_t = 0.1651 m × 2.3271 rad/s² ≈ 0.3840 m/s²

So, the magnitude of the tangential acceleration of the bug on the rim is approximately 0.3840 m/s².

TO KNOW MORE ABOUT magnitude of the tangential acceleration  CLICK THIS LINK -

brainly.com/question/31166904

#SPJ11

The current of a lightning bolt that delivers a charge of 35 columns to the ground in a time can be calculated using the formula: current = charge / time.

To calculate the current of the lightning bolt, we need to divide the charge of 35 columns by the time it takes for the bolt to reach the ground. However, the time it takes for a lightning bolt to reach the ground varies depending on various factors such as the distance between the cloud and the ground, the strength of the electric field, and the conductivity of the atmosphere.
On average, the time it takes for a lightning bolt to reach the ground is about 30 microseconds. Using this average value and the formula above, we can calculate the current of the lightning bolt as follows:
current = 35 / (30 x 10^-6) = 1,166,667 amperes
Therefore, the current of the lightning bolt that delivers a charge of 35 columns to the ground in a time is approximately 1,166,667 amperes.

To know more about Electric Current visit :

https://brainly.com/question/2264542

#SPJ11

Answer:

20W

Explanation:

As P = W/t

P = FS/

P = 20x5/5

= 100/5

=20J/s or W

therefore, P = 20W

A piece of cloth will lose contact with the wall of the cylinder and fall down at an angle of approximately 41.76 degrees.

To find the angle at which a piece of cloth loses contact with the wall of the cylinder and falls down, we need to calculate the minimum angle where the centripetal force is equal to the gravitational force acting on the cloth.
Step 1: Convert the rotation speed to radians per second
44.5 rev/min * (2π rad/rev) * (1 min/60 sec) = 4.66 rad/s
Step 2: Calculate the centripetal force (Fc) needed to keep the cloth in contact with the cylinder wall
[tex]Fc = m * r * \omega^2[/tex]
where m is the mass of the cloth, r is the radius of the cylinder (0.5 * diameter = 0.5 * 0.660 m = 0.33 m), and ω is the angular speed (4.66 rad/s)
Step 3: Equate the centripetal force to the gravitational force (Fg)
Fc = Fg
[tex]m * r * \omega^2 = m * g[/tex]
[tex]\omega^2 = g / r[/tex]
Step 4: Calculate the angle θ
[tex]\theta = arccos(\omega^2 / g)[/tex]
[tex]\theta = arccos(4.66^2 / (9.81 * 0.33))[/tex]
θ ≈ 41.76 degrees

To learn more about speed click here https://brainly.com/question/28224010

#SPJ11

The kinetic energy of the emitted electron, after all the calculations is 3 eV.

According to the question, the equation given is:

E = [tex]W_o[/tex]+ KE

where E is the energy of the incident photon, [tex]W_o[/tex] is the work function, and KE is the kinetic energy of the emitted electron.

We are given E = 5 eV and [tex]W_o[/tex]= 2 eV.

After substituting these values into the equation, we get:

5 eV = 2 eV + KE

Then after solving for KE, we get:

KE = 5 eV - 2 eV = 3 eV

Therefore, after all the calculations, the kinetic energy of the emitted electron comes as 3 eV.

To know more about kinetic energy, visit:

https://brainly.com/question/26472013#

#SPJ11

The electrons in the circuit are converted into heat, light, sound or mechanical energy, depending on the appliance. The flow of electrons, or current, is not lost but transformed into a different form of energy.

The kinetic energy of the electrons is converted into other types of energy that the appliance needs to function. The main power supply voltage is not lowered, and electric charges are not lost, they are simply transformed. It's important to be mindful of our energy consumption and make choices that are more efficient to reduce our environmental impact and save money on our electricity bills.

When we say an appliance "uses up electricity," we are really saying that electron kinetic energy is changed to heat (option d). In a typical electrical circuit, appliances convert electrical energy into other forms of energy like heat, light, or mechanical energy. This process involves the flow of electrons, and their kinetic energy is transformed to fulfill the appliance's function. The main power supply voltage is not lowered, electrons are not removed from the circuit or placed elsewhere, current does not disappear, and electric charges are not lost during this process. Instead, the electron kinetic energy is changed to heat or other forms of energy as needed by the appliance.

To know more about electricity visit:

https://brainly.com/question/8971780

#SPJ11

Star B is further away, and it is approximately 0.398 times farther away than Star A.

To determine how many times further away it is than star A, we will follow these steps:

Step 1: Recall the distance modulus formula which relates absolute magnitude (M), apparent magnitude (m), and distance (d) in parsecs:
m - M = 5 * log10(d/10)

Step 2: Since both stars have the same apparent magnitude, let's call it 'm' for both.

We can set up two equations for the two stars:
m - 5 = 5 * log10(d_A/10)
m - 7 = 5 * log10(d_B/10)

Step 3: We want to find the ratio of the distances (d_B/d_A).

Subtract the first equation from the second to eliminate 'm':
-2 = 5 * log10(d_B/d_A) - 5 * log10(1)

Step 4: Simplify and solve for the ratio of distances:
-2/5 = log10(d_B/d_A)
[tex]10^{(-2/5)}[/tex] = d_B/d_A

Step 5: Calculate the value of the ratio:
d_B/d_A ≈ 0.398

Learn more about star:

https://brainly.com/question/13018254

#SPJ11

To find the amplitude of vibration, we can use the following steps:

1. Calculate the maximum kinetic energy (KE) of the box using the formula KE = 0.5 * m * v^2, where m is the mass of the box (0.50 kg) and v is the speed at the equilibrium position (1.5 m/s).

2. Calculate the maximum potential energy (PE) of the box, which is equal to the maximum kinetic energy (as the total energy in simple harmonic motion is conserved).

3. Use the formula for potential energy stored in a spring, PE = 0.5 * k * A^2, where k is the spring constant (20 N/m) and A is the amplitude of vibration.

4. Solve for the amplitude A.

Now, let's follow these steps:

1. Calculate the maximum kinetic energy: KE = 0.5 * 0.50 kg * (1.5 m/s)^2 = 0.5 * 0.50 * 2.25 = 0.5625 J

2. Maximum potential energy equals maximum kinetic energy: PE = 0.5625 J

3. Use the formula for potential energy stored in a spring: 0.5625 J = 0.5 * 20 N/m * A^2

4. Solve for the amplitude A:
0.5625 J = 10 * A^2
A^2 = 0.05625
A = √0.05625 = 0.237 m (rounded to three decimal places)

So, the amplitude of vibration is approximately 0.24 m. The closest answer choice is 0.24 m.

Learn more about amplitude of vibration here:

https://brainly.com/question/1380029

#SPJ11

The frictional force keeping the 7.00-kg mass from sliding on a 28.0° incline with a coefficient of static friction of 0.574 is 34.8 N.

The frictional force in this situation can be calculated using the formula

frictional force = coefficient of static friction x normal force

where the normal force is the force perpendicular to the incline, which can be calculated using the formula:

normal force = mass x gravitational acceleration x cosine(theta)

where theta is the angle of the incline.

Plugging in the given values, we get:

normal force = 7.00 kg x 9.81 m/s^2 x cosine(28.0°) = 60.6 N

Then, using the coefficient of static friction of 0.574, we get:

frictional force = 0.574 x 60.6 N = 34.8 N

Therefore,
The frictional force keeping the 7.00-kg mass from sliding on a 28.0° incline with a coefficient of static friction of 0.574 is 34.8 N.

Learn more about frictional force

brainly.com/question/30280752

#SPJ11

At room temperature, the alloy containing 60wt%pb-40wt%sn is expected to have two phases: α-phase (tin-rich solid solution) and β-phase (lead-rich solid solution).

The amount of each phase present in the material at room temperature can be determined using the lever rule. Assuming complete solidification, the α-phase will have a weight fraction of 40/100 or 0.4, while the β-phase will have a weight fraction of 60/100 or 0.6.

The expected microstructure of the alloy at room temperature will consist of two distinct phases, with the α-phase appearing lighter in color than the β-phase. The two phases will be intermixed throughout the material, with varying grain sizes and orientations depending on the cooling rate and other processing conditions. A typical microstructure may show a network of α-phase surrounded by a continuous β-phase matrix.

More on alloys: https://brainly.com/question/15073695

#SPJ11

Plant cells are different from animal cells in the sense that only plant cells can perform photosynthesis (option D).

Photosynthesis is a biological process by which green plants manufacture their own food (sugar) using energy from sunlight.

In other terms, it can be said that photosynthesis is any process by which plants and other photoautotrophs convert light energy into chemical energy.

Animal cells are rather heterotrophic, meaning that they cannot synthesize their own food like plants do.

Learn more about photosynthesis at: https://brainly.com/question/29764662

#SPJ1

A star with a mass like our Sun cannot fuse elements beyond carbon and oxygen because it does not have sufficient temperature and pressure in its core to overcome the strong electrostatic repulsion between the atomic nuclei of heavier elements.

Stars generate energy through nuclear fusion, where lighter elements combine to form heavier elements in their cores. In the case of a star like our Sun, it primarily fuses hydrogen into helium. As the hydrogen in the core depletes, the core contracts and heats up, allowing for helium fusion to occur. This process creates elements like carbon and oxygen.
However, fusing elements beyond carbon and oxygen requires much higher temperatures and pressures. This is due to the strong electrostatic repulsion between the positively charged atomic nuclei of these heavier elements, also known as the Coulomb barrier. To overcome this barrier, the core needs to have enough energy for the nuclei to come close enough together for the strong nuclear force to bind them.
In summary, a star with a mass like our Sun cannot produce elements beyond carbon and oxygen because its core does not reach the necessary temperature and pressure required to overcome the electrostatic repulsion between the nuclei of heavier elements.

For more information on star kindly visit to

https://brainly.com/question/7169403

#SPJ11

When anything or a system is at rest and neither tilts nor rotates, it is said to be in static equilibrium.

Thus, The phrase "static" denotes that the body is not moving, whereas the term "equilibrium" denotes the balance of all opposing forces.

So, if an object is at rest and all external forces and other influences are in balance, the system is said to be in static equilibrium. A rigid body is an idealized object in physics whose deformation is negligible or, at the absolute least, extremely close to zero.

The rigid body definition states that even if an object's neighbouring points change, the thing remains its original shape. When all of the points in a body move consistently in a single direction or line, this is known as translational motion. It describes an object's linear motion in one to three dimensions.

Thus, When anything or a system is at rest and neither tilts nor rotates, it is said to be in static equilibrium.

Learn more about Static equilibirium, refer to the link:

https://brainly.com/question/24160155

#SPJ12

The statement "the ball falls faster during the fourth second than it did during the first second" is false.

The ball falls at a constant acceleration due to gravity, which is approximately 9.8 m/s² near the surface of the Earth. Therefore, the speed of the ball increases at a constant rate as it falls. The equation d = 1/2 * g * t² can be used to calculate the distance the ball falls in a given amount of time, where d is the distance, g is the acceleration due to gravity, and t is the time. The statement "the ball falls a greater distance during the fourth second than it did during the first second" would be true.

To know more about speed,

https://brainly.com/question/23822232

#SPJ11

All of the listed options (a. gantry system, b. rf system, c. gradient system, d. static magnetic field (b0)) are associated with MRI systems used for MR imaging.

MR (Magnetic Resonance) imaging, also known as MRI (Magnetic Resonance Imaging), is a medical imaging technique that uses a strong magnetic field and radio waves to generate detailed images of the inside of the body. MRI does not use ionizing radiation, making it a safer alternative to other imaging techniques such as CT scans or X-rays.

During an MRI scan, the patient lies inside a large tube-like machine that contains a powerful magnet. The magnetic field causes the protons in the patient's body to align in a particular direction. Radio waves are then used to create a pulse that disturbs this alignment, causing the protons to emit a signal that is picked up by the MRI machine. These signals are processed by a computer to generate detailed, cross-sectional images of the inside of the body.

To learn more about Magnetic field Here:

https://brainly.com/question/23096032

#SPJ11

The collisions of molecules are directional, while those in heat are random.

In work, the collisions of molecules are directional, while those in heat are random. The Latin "moles," or little unit of mass, is the source of the term "molecule," according to Merriam-Webster and the Online Etymology Dictionary.

                                     The word is taken from the French molécule (1678), which was itself derived from the diminutive of the Latin word moles, meaning "mass, barrier" in New Latin.

                                                      Therefore, the correct option is b) directional, random.

Learn more about molecules

brainly.com/question/19922822

#SPJ11

Based on the given terms, it appears that you are referring to the relationship between tension and linear density in an elastic string. Yes, there is a relationship between the tension (T) and the linear density (μ) of an elastic string.

The relationship can be described by the wave velocity equation: v = √(T/μ) In this equation, v represents the wave velocity. The relationship indicates that as the tension in the string increases, the wave velocity also increases, provided that the linear density remains constant. Similarly, if the linear density increases, the wave velocity decreases, given that the tension remains constant.

However, generally speaking, there is a relationship between the tension in an elastic string and its linear density. When the tension in an elastic string increases, its linear density also increases. This is because the tension causes the string to stretch and elongate, which leads to a reduction in its cross-sectional area and an increase in its linear density. Similarly, when the tension in the string decreases, its linear density also decreases. So, in summary, there is a direct relationship between tension and linear density in elastic strings.

To know more about elastic string click here:

https://brainly.com/question/27217464

#SPJ11

Static electricity is an essential concept in understanding various situations in our everyday life. Two common examples where knowledge of static electricity would be helpful are handling electronic devices and doing laundry.

1. Electronic devices: Many electronic devices, such as computers, smartphones, and televisions, contain sensitive electronic components that could be damaged by a static electricity discharge. Knowing how static electricity works can help us prevent such damage. For instance, you can avoid building up static charge by not walking on carpets while wearing rubber-soled shoes or by using an anti-static wristband when handling electronic components. This understanding of static electricity can protect your devices and save you from potential repair costs.

2. Laundry: When we do laundry, clothes made of different materials can rub together, creating static electricity. This can lead to clothes sticking together or to our bodies, which can be inconvenient and frustrating. Knowing how static electricity forms can help us take steps to minimize it, such as adding dryer sheets to our laundry, which helps to neutralize the static charge. Additionally, we can hang clothes to air dry, reducing the friction that creates static electricity.

In summary, understanding static electricity can help us prevent damage to electronic devices and avoid static cling in our laundry. These everyday examples illustrate the importance of being aware of static electricity and its effects on our daily lives.

Know more about Static electricity here :

https://brainly.com/question/18562731

#SPJ11

The equation of motion for m₁, a = (m₁ + m₂/2)g / (m₁+m₂+m₃/2).

Balancing the net force on each body we can calculate the equation of motion for mass m₁.

Given: masses of blocks m₁, m₂ and m₁ > m₂.

moment of inertia of disk I = mr²/2

acceleration due to gravity g = 9.8 m/s²

For mass m₁,

m₁g - T₁ = m₁a (1)

for mass m₂,

T₂ - m₂g×sin30⁰ = m₂a (2)

for pulley , r(T₁ - T₂) = Iα = Ia/r (3)

solving equations (1), (2) and (3), we get

a = (m₁ + m₂/2)g / (m₁+m₂+m₃/2).

Therefore, equation of motion for m₁, a = (m₁ + m₂/2)g / (m₁+m₂+m₃/2).

To learn more about forces, click here :

https://brainly.com/question/13191643

#SPJ12

You will likely see a "colorful pattern on the plastic". The pattern that is seen is caused by the interference of the polarized light waves passing through the twisted plastic and the second polarizer.

This interference causes different colors to appear, as the different wavelengths of light are affected differently by the twisting of the plastic.

This is because LCD and LED screens emit polarized light, meaning that the light waves all oscillate in the same direction.

When the polarizer plate is placed in front of the screen, it only allows light waves oscillating in one direction to pass through, blocking out all other light waves.

When the twisted plastic is inserted between the screen and the polarizer plate, it acts as a second polarizer.

The plastic twists the polarization direction of the light waves passing through it so that some of the light waves that were previously blocked by the first polarizer can now pass through the twisted plastic and reach the second polarizer.

to know more about  interference refer here:

https://brainly.com/question/16098226#

#SPJ11

The requried,  minimum thickness of TiO2 that needs to be added to achieve the desired cancellation of reflected light is approximately 104.198 nm.

To determine the minimum thickness of TiO2 required for the reflected light to cancel, we need to consider the interference between the light waves reflected at the top and bottom surfaces of the film.

Given:

The wavelength of incident light (λ) = 545 nm

Index of refraction of air (n) = 1.00

Index of refraction of crown glass (n_glass) = 1.52

Index of refraction of TiO2 (N) = 2.62

Initial thickness of TiO2 film (ti) = 1036 nm = 1.036 μm

Additional thickness to be added (Δt) = 4.08 nm = 0.00408 μm

To achieve cancellation of the reflected light, the additional thickness (Δt) should be such that the phase difference between the waves reflected from the top and bottom surfaces of the film is half a wavelength (λ/2).

The phase difference (Δφ) is given by:

Δφ = 2πΔt(N)/λ

For cancellation, Δφ should be equal to π radians.

Setting up the equation:

2πΔt(N)/λ = π

Simplifying:

Δt(N) = λ/2

Substituting the given values:

Δt(2.62) = (545 nm)/2

Solving for Δt:

Δt ≈ (545 nm / 2) / (2.62) ≈ 104.198 nm

Therefore, the minimum thickness of TiO2 that needs to be added to achieve the desired cancellation of reflected light is approximately 104.198 nm.

Learn more about the refractive index here:

https://brainly.com/question/15392265

#SPJ12

Supersymmetry is a theoretical concept in particle physics that suggests the existence of a symmetry between two types of fundamental particles: fermions and bosons. Fermions, such as electrons and quarks, have half-integer spins, while bosons, such as photons and W and Z bosons, have integer spins.

According to supersymmetry, each type of particle should have a corresponding "superpartner" with the opposite spin.

For example, the superpartner of an electron would be a hypothetical particle called a selectron, which would be a boson with the same mass as an electron. Supersymmetry has been proposed as a solution to several outstanding problems in particle physics, such as the hierarchy problem and the existence of dark matter, but so far no experimental evidence has been found to support its existence.

To know more about fermions and bosons:

https://brainly.com/question/15573591

#SPJ11

The figure shows that both electromagnetic waves have the same speed (c, the speed of light in a vacuum) but different frequencies due to their varying wavelengths.

In the given figure, two electromagnetic waves are traveling in a vacuum. Electromagnetic waves always travel at the speed of light (c ≈ 3 x 10^8 m/s) in a vacuum, regardless of their frequency or wavelength. Therefore, both waves have the same speed.

However, their frequencies differ because the wavelengths are not the same.

Frequency (f) and wavelength (λ) are related by the equation c = fλ. Since the speed of light is constant, when the wavelength is longer, the frequency is lower, and vice versa. In figure 2, one wave has a longer wavelength than the other, so their frequencies are different.

To know more about electromagnetic waves click on below link:

https://brainly.com/question/3101711#

#SPJ11

"Opacity" The opacity of the gas in the star can affect the passage of light through it, causing the light emitted by the star to vary periodically.

Essentially, when the gas in the star becomes more opaque, it blocks more light from passing through, resulting in a dimming effect.

Conversely, when the gas becomes less opaque, more light can pass through, resulting in a brightening effect.

Hence, changes in a star's opacity can cause variations in the light emitted by the star.

learn more about Opacity click here:

https://brainly.com/question/14135361

#SPJ11

Based on the given figure of the electromagnetic field for two waves traveling in a vacuum, we can determine that the frequency of wave A is higher than that of wave B.

However, we cannot determine the speed of the waves from the given information. Therefore, the correct statement is: "The frequency of wave A is higher than that of wave B, but the speeds of the two waves cannot be determined from the given figure." It is important to note that frequency and speed are two different properties of waves. Frequency refers to the number of cycles of the wave that occur in a given time, while speed refers to the distance the wave travels in a given time.

To learn more about frequency click here https://brainly.com/question/17196899

#SPJ11

If all collisions are completely inelastic, the final speed and direction of the motion of the gliders is the same.

When two objects collide completely inelastically, they stick together and move off in the same direction. This is because kinetic energy is not conserved in an inelastic collision, and the energy is instead transferred into other forms such as thermal energy, sound energy, and deformation energy.

During the collision, the momentum of the system is conserved. We can express this conservation of momentum as m₁v₁ᵢ + m₂v₂ᵢ = (m₁ + m₂)vf, where m₁ and m₂ are the masses of the two gliders, v₁ᵢ and v₂ᵢ are their initial velocities, and vf is their final velocity.

Since the gliders stick together after the collision, their final velocity will be the same and we can solve for it as vf = (m₁v₁ᵢ + m₂v₂ᵢ) / (m₁ + m₂). The direction of their motion will be the same as the direction of the initial motion of the two gliders.

To know more about completely inelastic, refer here:
https://brainly.com/question/29168536#
#SPJ11

The maximum electric potential at the surface of the raindrop can be found using the formula V = E * d, where V is the electric potential, E is the electric field, and d is the distance from the surface to a point infinitely far away where the electric potential is zero. Since the electric potential is zero infinitely far away, we can assume that d is equal to infinity.

Therefore, the maximum electric potential at the surface of the raindrop is:

V = E * infinity

Since infinity is not a real number, we cannot directly calculate this value. However, we can say that the electric potential at the surface of the raindrop is proportional to the electric field just outside the raindrop. So, we can write:

V_surface = k * E

where k is a constant of proportionality.

Therefore, the maximum electric potential at the surface of the raindrop is:

V_surface = k * E_max

where E_max is the maximum electric field just outside the raindrop.

To know more about electric field visit :-

https://brainly.com/question/26978411

#SPJ11

In general, the color in a spectrum that should produce the highest order is the color with the shortest wavelength, which is violet.

This is because the diffraction grating or prism used to create the spectrum will spread the colors out in order of increasing wavelength, with the shortest wavelengths being bent the most.
As for why higher-order lines were not observed, this could be due to a variety of factors. One possibility is that the apparatus was not capable of resolving higher-order lines due to limitations in its design or sensitivity. Another possibility is that the higher-order lines were simply too weak or faint to be detected, especially if the apparatus was not highly sensitive or if the light source used was not very bright. Additionally, other sources of noise or interference could have made it difficult to distinguish higher-order lines from other spectral features.

Learn more about spectrum here:

https://brainly.com/question/12157930

#SPJ11