you decide to use your garden hose to wash your garage door. the water shoots out at a rate of 10 kg/s and a speed of 16 m/s with respect to the hose. when the water hits the garage, its speed decreases to zero. determine the force that the water exerts on the wall. what assumptions did you make?

The 15.04 m/s fast will it be moving when it hits the ground.

An object's velocity is a key factor in determining its position and rate of motion. It is comprehensible as the distance an object moves in a single interval of time. The term "velocity" describes how far an object travels in a predetermined length of time.

Measuring inertia, a property of all stuff that cannot be changed. What a body of matter is in essence is the resistance it provides to a change in its speed or location brought about by the application of a force.

The vertical component of velocity is given by

usinθ

Here,u=25m/s and θ=37°

So,vertical component will be 25sin37°

And on further solving it would be 15.04 m/s.

Therefore, 15.04 m/s fast will it be moving when it hits the ground.

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The speed of bullet is 31.72 m/s.

First use the angular displacement to find the time.

Speed is what it means. the speed at which an object's location changes in any direction. The distance traveled in relation to the time it took to travel that distance is how speed is defined. Since speed simply has a direction and no magnitude, it is a scalar quantity.

The pace at which a distance changes over time is referred to as speed. It has a dimension of time-distance. As a result, the fundamental unit of time and the basic unit of distance are combined to form the SI unit of speed. Thus, the metre per second (m/s) is the SI unit of speed.

Δθ = ω t

40° × (1 rev / 360°) = 1396 rev/min × (1 min / 60 s) t

t = 0.029s

Now use the distance to find the speed.

v = Δx / t

v = 0.92 m / 0.029s

v = 31.72 m/s

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The speed of the car at the bottom of the drop is 980 m/s. The result is obtained by using the concept of conservation of mechanical energy.

The principle of conservation of energy states that "The total energy is neither increased nor decreased in any process. Energy can be transformed from one form to another, and transferred from one object to another, but the total amount remains constant."

In the same way, the Conservation of Mechanical Energy states that the total mechanical energy of a system is conserved. It can be expressed as

½mv₁ + mgh₁ = ½mv₂ + mgh₂

Where

A roller coaster's largest drop is 50.0 m starts from the rest. Find the speed at the bottom of that drop!

The case is similar to an object falling down without initial speed.

We have

At the bottom of the drop, the height is zero. So, h₂ = 0.

The speed of the car at the bottom would be

½mv₁ + mgh₁ = ½mv₂ + mgh₂

0 + 9.8(50) = ½v₂ + 0

490 = ½v₂

v₂ = 490 × 2

v₂ = 980 m/s

Hence, at the bottom of the drop, the speed of the car is 980 m/s.

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Answer:

Explanation:

m = 4.0 kg

v = 2.0 m/s

g = 10 m/s²

Mechanical energy of the pendulum = 68.0 J

Mechanical energy of the pendulum  = Potential energy of the pendulum  + Kinetic energy of the pendulum

mgh + 1/2 mv² = 68

4 × 10 × h + 1/2 × 4 × 2 × 2 = 68

40 h + 8 = 68

40 h = 68-8

40 h = 60

h = 60 / 40

h = 3/2 m

h = 1.5 m

The efficiency of the moving of Harry can be calculated by dividing the work done by the energy used. The work done is the force times the distance, or 200 N x 0.555 m = 111 Nm.

Efficiency is the ability to achieve a desired result with the least amount of effort, time, and resources. It is a measure of how well an organization, process, or system uses resources to produce a desired result. Efficiency is important in many aspects of life and work, as it helps to maximize resources and minimize costs.

In business, efficiency is often measured by comparing the output of a process to the resources used to produce it. For example, a business may measure the efficiency of its production process by looking at the ratio of the number of products produced compared to the amount of labor, materials, and energy used. Efficiency is also closely related to productivity, which is the ability to produce more output with the same or fewer resources. In general, efficiency is important for organizations to remain competitive and profitable.

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1. The initial velocity of the penguin is 4.17 m/s

2. The height of the ice shelf is 7.056 m

The initial velocity of the penguin can be obatined as illustrated below:

s = ut

5 = u × 1.2

Divide both sides by 1.2

u = 5 / 1.2

u = 4.17 m/s

Thus, we can conclude that the initial velocity is 4.17 m/s

The height of the ice shelf can be obtained as follow:

h = ½gt²

h = ½ × 9.8 × 1.2²

h = 4.9 × 1.44

h = 7.056 m

Thus, we can conclude that the height of the ice shelf is 7.056 m

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Complete question:

A penguin slides horizontally off an ice shelf and land 5.00 meters from its base in 1.20 sounds

1. What is the initial velocity of the penguin?

2. What is the height of the ice shelf?

The emission spectrum of this system will contain four different wavelengths, corresponding to each of the allowed energies.

Wavelength is a measure of the distance between two consecutive wave crests or troughs and is usually defined as the length of one full cycle of a wave. Wavelengths are typically measured in meters, centimeters, or nanometers (10-9 meters). Wavelength is inversely related to frequency, meaning that higher frequency waves have shorter wavelengths.

The wavelength of each energy level can be calculated using the equation λ = hc/E, where h is Planck's constant, c is the speed of light, and E is the energy level in electron volts. Using this equation, the four wavelengths of the emission spectrum are calculated as follows: 0.0 eV = 0.0 m, 1.5 eV = 8.0 x 10^-7 m, 3.0 eV = 4.0 x 10^-7 m and 6.0 eV = 2.0 x 10^-7 m. Thus, the emission spectrum of this system will contain four different wavelengths, which can be identified by their corresponding energy levels.

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The coefficient of static friction between the rod and the rails is 502.04.

The resistive force of friction (Fr), which pushes the objects together, is divided by the normal or perpendicular force (N), which pushes them apart, to produce the coefficient of friction (fr), which is a numerical value. The following formula used, fr = Fr/N.

Given,

Mass of metal rod = 20.0 grams to kg = 0.02 kg

Resistance = 0.5 Ohms

Distance, L = 800 cm to m = 0.8 m

Voltage = 500 Volts

Magnetic flux, B = 0.123 Tesla

Use Gauss's law of magnetic field,

We would first measure the current passing through the rails,

Current = voltage/resistance

Current = 500/0.5

Current = 1000Amps.

The following formula describes the magnetic force acting on a current-carrying conductor,

Fm = BIL

Fm =  0.123×1000×0.8

Fm = 98.4N

The metal rod's limiting frictional force is given by,

Fr = µmg

Additionally, before the metal rod begins to move, the magnetic force must be equal to the limiting frictional force,

Fm = Fr

98.4 = µmg

98.4 = µ × 0.02×9.8

98.4 = µ× 0.196

µ = 98.4/0.196

µ = 502.04.

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Eastward moving air mass across the US in the winter may cool, pick up moisture and pollutants, and interact with other weather systems, leading to changes in temperature, humidity, precipitation and wind patterns.

As an air mass moves eastward from the Pacific Ocean across the United States in the winter, several modifications could take place. The air mass may cool as it moves over land, causing any moisture present to condense and potentially leading to precipitation.

Additionally, the air mass may pick up moisture from bodies of water such as lakes and rivers, increasing its humidity. As the air mass moves over different types of terrain and land cover, it may also pick up pollutants from human activities such as industrial emissions and automobile exhaust.

The air mass may also interact with other weather systems, such as cold fronts or high pressure systems, which could further modify its temperature, humidity, and wind patterns.

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Now, 0.65 rad/s and 0.7 rad/s are different. Average angular velocity is defined as total displacement divided by total displacement time.

What is the straightforward meaning of velocity?

The displacement that an object or particle experiences with respect to time is expressed vectorially as velocity. The meter per second (m/s) is the accepted unit of velocity magnitude (also known as speed).

How do velocity and speed differ?

Velocity is the pace and direction of an object's movement, whereas speed is the time rate at which an object is travelling along a path. In other words, velocity is a vector, whereas speed is a scalar value.

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The initial value of the angular velocity is -6.633 rad/s.  The instantaneous value of the angular velocity is -3.817 rad/s.

In terms of time, an object or particle's movement is expressed vectorially as velocity. The recognized measurement of velocity magnitude is the meter per second (m/s) (also known as speed).

Part A:

The angular velocity of the merry-go-round as a function of time is the derivative of the angle with respect to time.

Angular velocity, w(t) = dθ(t) / dt = -7 + 0.367

Part B:

The initial value of the angular velocity is the value of the angular velocity at t = 0.

w(0) = -7 + 0.367 = -6.633 rad/s

Part C:

To find the instantaneous value of the angular velocity at a specific time, we need to substitute that time into the angular velocity equation.

w(t) = -7 + 0.367t

w(5.50) = -7 + 0.367(5.50) = -3.817 rad/s

Part D:

To find the average angular velocity for a time interval, we can use the following formula:

average angular velocity = (final angle - initial angle) / (final time - initial time)

Given the time interval t = 0 to t = 5.50s,

average angular velocity = (θ(5.50s) - θ(0)) / (5.50s - 0s)

θ(t) = -7t + 3

average angular velocity = (-7*5.50 + 3 - 3)/5.50 = -7 rad/s

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The orbital period of a spacecraft in a low orbit near the surface of mars is found to be 5.9 x 10³ secs

A satellite's orbit is the name for the route it takes. The capacity and purpose of the sensor(s) that a satellite is carrying are matched to its orbit. Selection of an orbit can vary depending on its altitude (height above the Earth's surface), orientation, and rotation with respect to the Earth.

The free-fall acceleration ( g ) = 3.8 m/s²

Radius of the satellite orbit = Radius of Mars ( rMars ) = 3.37 * 10⁶

R ( radius ) = 3.37 * 10⁶

g = ω2 x R

=>ω = Sqrt (R/g)

T = 2π/ω

=> 2π/ sqrt(R/g)

T = 5.9 * 10³ secs

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Spacecraft have been sent to Mars in recent years. Mars is smaller than Earth and has correspondingly weaker surface gravity. On Mars, the free-fall acceleration is only 3.8m/s2 .What is the orbital period of a spacecraft in a low orbit near the surface of Mars? Assume the radius of the satellite's orbit is about the same as the radius of Mars itself, rMars = 3.37

To calculate the average angular speed, we need to divide the angle of rotation (2π radians) by the total time (2.5 minutes). This gives us an angular speed of 0.200 rad/s.

Average angular speed is the average rate of change in angular position over a period of time. It is measured in radians per second (rad/s) or revolutions per minute (rpm). For example, if a wheel completes two revolutions in one minute, its average angular speed is 2π rad/s or 2 rpm. It is important to note that average angular speed is not the same as instantaneous angular speed, which is the rate of change at a single point in time.

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To calculate the average angular speed, we need to divide the angle of rotation (2π radians) by the total time 150 seconds (2.5 minutes). This gives us an angular speed of 0.084 rad/s.

Average angular speed is the average rate of change in angular position over a period of time. It is measured in radians per second (rad/s) or revolutions per minute (rpm). For example, if a wheel completes two revolutions in one minute, its average angular speed is 2π rad/s or 2 rpm. It is important to note that average angular speed is not the same as instantaneous angular speed, which is the rate of change at a single point in time.

θ = 2 x 2π = 12.56

t = 150 sec.

ω = Θ/t

ω = 12.56 / 150

ω = 0.084 rad/s

Correct option is: 0.084 rad/s.

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The orbit of Jupiter has a radius that is roughly five times that of the earth. the centripetal acceleration of Jupiter will be (v^2 / 5r) which is 1/5th the acceleration of Earth.

zero

The intersection of the gravitational fields of the Sun, Earth, and Moon is known as the neutral point because it is where the combined gravitational pull of the three bodies is zero. About 80 times as much mass as the Moon is the Earth.

The centripetal acceleration of a planet in a circular orbit is given by the formula: a = v^2 / r, where a is the acceleration, v is the velocity of the planet, and r is the radius of the orbit. Since Jupiter's orbit is approximately 5 times the radius of Earth's orbit, the radius of Jupiter's orbit is 5r.

Since the velocity of both planets is roughly the same (as they both travel in roughly circular orbits around the Sun), the centripetal acceleration of Jupiter will be (v^2 / 5r) which is 1/5th the acceleration of Earth.

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h₂ = P/ρ₂g = 85299.2 Pa/(1000 kg/m³ × 9.8 m/s²) = 85299.2 Pa/9800 kg/m ²s² = 8.7 m

About 4.5 trillion years ago, gravity brought together spinning gas and debris to create Mercury, the small planet closest to the Sun. Mercury has a solid crust, a steep slope, and a central core, just like its sibling terrestrial planets.

Calculation

The pressure due to the mercury of height h = 64 cm = 0.64 m is

P = ρ₁gh₁ where ρ₁ = density of mercury = 13600 kg/m³

P = 13600 kg/m³ × 9.8 m/s² × 0.64 m = 85299.2 Pa

Since this is the same pressure for the water,

P = ρ₂gh₂ where ρ₂ = density of water = 1000 kg/m³ and h₂ = height of

water

h₂ = P/ρ₂g = 85299.2 Pa/(1000 kg/m³ × 9.8 m/s²) = 85299.2 Pa/9800 kg/m ²s² = 8.7 m

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The power of a motor that does 24 000 J of work in two minutes​ is 200 watts.

Power is the rate at which energy is transferred, used, or transformed. It is often measured in units of watts (W) or horsepower (hp). Power can also refer to the ability or capacity to do something, such as the power of a ruler to govern or the power of a machine to perform a specific task. In physics, power is defined as the amount of work done per unit of time.

The power output of that motor would be 24,000 joules per two minutes, or 12,000 joules per minute (24,000/2). To convert to watts, divide by the number of seconds per minute, which is 60. Therefore, the power output of the motor is 200 watts (12,000/60).  

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The complete question is:

When a person abducts the shoulder to 90 degrees, then moves the arm backward, that motion called horizontal abduction.

The transverse plane movement of the arms away from the body's midline is known as horizontal abduction. Consider lowering the pec fly as an example. Higher ball velocity has been linked to greater horizontal abduction during foot impact.

The movement of the arms across the body in a horizontal plane is known as horizontal abduction. Moving in the transverse plane, starting with the arms straight to the front (shoulders flexed at 90 degrees), and ending with the arms straight out to the side (flexed at 90 degrees).

Arm abduction is the coronal plane movement of the arm away from the midline of the body, and unilateral abduction is typically possible between 160° and 180°.

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Answer:

My answer is 3 because this happend to someone I know

Explanation:

Vx = 11.5 m/s

h = 45.2 m

g = 9.8 m/s²

Vi.y = 0 m/s (Initial vertical velocity)

x - ?

Solution:

1. h = Vi.y • t + 1/2 • g • t²

Since Vi.y = 0, we will get: h = 1/2 • g • t²

t = sqrt(2h/g)

t = sqrt(2 • 45.2/9.8)

t = 9.22 sec

2. Vx = x/t

x = Vx • t

x = 11.5 • 9.22 = 106.03 meters

Its resistance generated by the LDR rises as the light level drops.The voltage drop across the LDR also rises as a result of this resistance's growth relative to the other resistor's fixed resistance.

The photo conductivity concept governs how a light-dependent resistor functions.Electrons become excited and escape the valance band to inhabit the conduction band when light, or photons, strike the material.Conduction band electrons raise conductivity and lower resistance.

The resistance of the LDR reduces as light intensity rises, which lowers the voltage differential across the LDR.

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The rate of rope pull must be ft/min in order for the boat to approach the dock at a rate of ft/min when ft of rope is out.

In order for the boat to approach the dock at a rate of ft/min when ft of rope is out, the rope must be pulled at a rate of ft/min.

This is because the rope will be pulled out of the pulley at the same rate that the boat is approaching the dock.

what is pulley?

A pulley is a simple machine consisting of a wheel with a groove in it for a rope or cable to run over.

It is used to change the direction of a force or to change the magnitude of a force. Pulleys are used to lift heavy objects and to transmit power in machines.

To calculate the rate of rope pull, we can use the formula speed = distance/time.

Therefore, speed = ft/min.

Therefore, The rate of rope pull must be ft/min in order for the boat to approach the dock at a rate of ft/min when ft of rope is out.

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The vehicles get twisted up. Before the collision, the second car was driving at a speed of v2.

A collision is a brief interface between individuals bodies or even more than 2 bodies at once that modifies the motion of the bodies involved as a result of internal forces acting between them. The forces involved in collisions

Both objects are accelerated by the equal-sized, opposite-directed forces that result from a collision. In collisions with objects of identical mass, all objects accelerate similarly.

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Yes, there can be a non-zero electric field at a point in space where no charged object is present. No, there cannot be an electric field equal to zero at a point where a charged object is present.

An electric field is defined as the force experienced per unit charge at a point in space. Even if there is no charged object present, an electric field can be present due to the presence of other charges in the surrounding area. For example, if there are charges present on a nearby conductor, the electric field can extend into the surrounding space.

On the other hand, it is not possible for an electric field to be equal to zero at a point where a charged object is present. The electric field is a measure of the force exerted on a test charge placed at that point, and a charged object exerts an electric force on other charges. Therefore, an electric field must be present at any point where a charged object is present.

The electric field can be zero at a certain point in space if there are no charges around that point or if the charges around that point balance each other out to create a net zero electric field.

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We have sg=v2/r v=2rf where f =36/60 s(9.8 m/s2)=(2*.11m*(35/60)) since the masses cancel when Ff =macsmg =mv2/r. 2/0.11m finds = .15 A coin falls off the turntable's static friction force with regard to coin.

The force of friction is influenced by outside forces. The two elements that friction depends on are as follows: 1. Regarding the makeup of the contact objects in touch. The two sides that are in touch with one other's depend on each other for friction.

In mathematics, the portion or component of the complete item is represented by a fraction. It stands for the equal components of the whole.

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Answer:

18.9 seconds

Explanation:

See the attached worksheet.  Since the desired information is outside the range of the graph, develop the equation of the line that is drawn.  From that equation [y = (9/10)x+3] the time required to travel 20 meters is foind to be 18.9 seconds.

When a building load, or force, acts on a building component, such as a column, the component takes on an internal resistance to the force known as stress. .

Stress is a measure of the internal resistance of a material to applied forces. It is calculated as the force per unit area. Stress can cause a building component to bend, stretch, or compress, and can ultimately lead to failure if the stress exceeds the material's strength.

There are two types of stress: tensile stress and compressive stress. Tensile stress is the stress that causes a material to stretch, while compressive stress causes a material to shrink or compress. Additionally, shear stress is a type of stress that causes a material to slide or deform along a plane, it's usually found in structures such as bridges, buildings, and towers.

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After a head-on, perfectly elastic collision, the speed of object B is 1.2 m/s.

According to the law of conservation of momentum, absent an external force, the combined momentum of two or more bodies operating upon one another in an isolated system remains constant. As a result, momentum cannot be gained or lost.

After a head-on, perfectly elastic collision, the speed of object B is

= - 20 {(60-140)/(60+140)} +  80 {(2×140/(140+60)}

= 120 cm/s

= 1.2 m/s.

Hence, the speed of object B is 1.2 m/s. Hence, option (d) is correct.

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The new gravitational force between them would be twice the initial gravitational force.

Newton's law of universal gravitation states that the force of attraction between two object in the universe is directly proportional to the product of their masses and inversely proportional to the square of the distance between the two objects.

Mathematically, the formula for Newton's law of universal gravitation is given as;

F = ( Gm₁m₂ ) / ( R² )

where;

When mass m1 of the two objects doubles, the new gravitational force will be calculated as;

F' = ( G x 2m₁ x m₂ ) / ( R² )

F' =  2( Gm₁m₂ ) / ( R² )

F' = 2F

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minimum time interval to stop should be = 0.08 seconds whereas the friction minimum stopping distance  = 0.64 m.

Which four forms of friction are there?

The force that prevents one solid item from moving across another is known as friction. Static friction, sliding friction, rolling friction, and fluid friction are the four main categories of friction.

What is frictional force, exactly?

Two surfaces that come into contact and glide against one another produce frictional force. The following variables impact the frictional force: Surface roughness and the amount of force pressing them together have the biggest an impact on these forces.

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Test 4 illustrates a balanced net force as both the forces acting in opposite directions are equal in magnitude.

Net force is zero in image depicted by test 4. Thus, the forces acting in opposite direction, upward and downward, can be considered as balance forces. Equal in size and directed oppositely, balanced forces are those. One definition of equilibrium is a state of balanced forces. When the forces are in balance, there is no change in direction.

While balanced forces can keep an object at rest or moving at a constant speed, unequal forces can cause objects to accelerate. We are brought back to remember the condition of weight in order to comprehend this as :

F = ma,

where the magnitude of Force is equal to the product of the mass and the acceleration due to gravity.

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How many electrons would have to be moved by one ball to the next in order to have a 1.00 x 104 N imbalance between them? 7.2 x 1010 is equal to fractional = n/ = (5.25 x 1015)/(72.8 x 1023).

In terms of physics, magnitude is just "distance or quantity." It demonstrates the size, direction, and speed of an item in both relative and absolute terms. It's used to indicate the size or scope of something. In physics, the term "magnitude" often refers to the a size or amount.

Calculation

m = mass of each aluminium sphere = 0.0250 kg = 0.0250 x 1000 g = 25 g

M = atomic mass = 26.982 g/mol

n = number of moles

Number of moles is given as

n = m/M

n = 25/26.982

n = 0.93

N₀ = Avogadro's number = 6.023 x 10²³

N = number of atoms

Number of atoms is given as

N = n N₀

N = (0.93) (6.023 x 10²³) = 5.6 x 10²³ atoms

= number of electrons per atom = 13

= total number of electrons

Total number of electrons are given as

=  N

= (13) (5.6 x 10²³)

= 72.8 x 10²³ electrons

b)

F = magnitude of electric force between the two spheres = 1 x 10⁴ N

r = distance between the spheres = 80 cm = 0.80 m

Q = magnitude of charge on each sphere = ?

Using Coulomb's law, force between the spheres is given as

F = k Q²/r²

inserting the values

1 x 10⁴ = (9 x 10⁹) Q²/(0.80)²

Q = 8.4 x 10⁻⁴ C

n = number of electrons removed

e = magnitude of charge on each electron

using the equation

Q = n e

8.4 x 10⁻⁴ = n (1.6 x 10⁻¹⁹)

n = 5.25 x 10¹⁵

c)

Fraction = n/  = (5.25 x 10¹⁵)/(72.8 x 10²³) = 7.2 x 10⁻¹⁰

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