An airplane with an airspeed of 140 km/h lands on a runway where the wind speed is 40 km/h . What is the landing speed of the plane if the wind is head on? as well as If the wind is a tailwind, coming from behind the airplane? and lastly What would be the landing speed of the 140- km/h plane landing in a headwind of 140 km/h ?

The air molecules are at least 75% of the air molecules at sea level.

Air molecules are microscopic particles of matter that make up the atmosphere. They are composed of two atoms of oxygen and two atoms of nitrogen, which are held together by covalent bonds.

The atmospheric pressure at sea level is about 1,000 mb, which is equivalent to the weight of the air column over a given area. Since the atmospheric pressure in Tibet is 500 mb, this means that the air molecules at this altitude make up about half of the air molecules at sea level. This means that at 18,000 feet, the air molecules are at least 75% of the air molecules at sea level.

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c. Yes, it is zero at point c. The vertical velocity component can become zero when the projectile reaches its maximum altitude.

At the highest point of the projectile, its vertical component is instantaneous before it changes direction and the object begins to fall under the influence of gravity.

Projectile motion is motion with a curved path in the form of a parabola curve. Due to this curved trajectory, the projectile's motion is included in two-dimensional motion. The meaning of two-dimensional motion is that the motion of objects can be projected in horizontal and vertical directions.

In physics, in the horizontal direction, there is no force affecting it so that the object moves at a constant speed. Conversely, in the vertical direction, the gravitational force pulls the object down so that the object moves at a constant speed.

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Manually calculating the heat input or arc energy supplied to produce a weld is a method that can be used for CC/CV.

How do heat input and weld speed relate to one another?

As voltage, current, wire feed rate, or a combination of these, or all three, increase, more heat is applied to the weld metal. With an increase in welding speed, the heat input drops. As the heat input increases, the rate of cooling of the weldment reduces.

Before the process efficiency is taken into account, arc energy is the energy that the welding arc supplies to the workpiece. The following equation can be used to compute it: where: The voltage, expressed in volts, is V. I represents the used current in amperes.

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If two waves having the same amplitude and frequency are traveling in the same medium. maximum destructive interference will occur when the phase difference between the waves is 180⁰.

The resultant amplitude of two waves with the same amplitude and frequency that collide while traveling in the same direction depends on the phase difference.

While there is no phase difference between two nodes, there is a 180⁰ phase variation between two antinodes.

The formula for the resulting amplitude caused by the superposition of two waves with a phase difference is:

A² = A1² + A2² + 2A1A2 cos ϕ

ϕ = 2π/3

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C. Branch-circuit overcurrent protective devices must be listed in combination with the specific device it is intended to protect.

The circuit consists of wires that connect the power source to fuses, switches and loads. Loads are devices that consume energy flowing through a circuit, like a light bulb in a lamp.

Branch circuits are a particular type of circuit that runs from the circuit breaker panel to the devices in the building. Branch circuits are classified as general purpose, equipment, or individual circuits depending on their function.

Every building that is connected to electricity has a circuit breaker panel. These panels are usually metal boxes or cabinets filled with switches and mounted on the wall. Every switch is connected to an electrical circuit in the house and can cut off the power to that circuit if it is turned off.

Branch circuits run from every switch to the receptacles, lights and equipment in the building.

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We consume a variety of goods and services, including groceries, toothpaste, internet access, cars and gas, fruits, and many more. They are likely to purchase an item if the price is low and it appears to be what they need or want.

Describe the relationship between a consumer and a producer.

People are producers when they create products and services—goods and services, goods and services, goods and services. They are consumers when they use the products that have been produced, the products that have been produced, the products that have been produced.

We pay costs for these products since we use them constantly and we need them in our daily life. We purchase groceries and fruits because we must eat food. Usually, the price of a thing is determined by the demand for it. Then, you can consider market competition, inflation rates, the standard of the goods, where they are available, how much it costs to produce them, as well as numerous government regulations and taxes.

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The resistance, resistivity and the drift speed of electrons are as follows:

What is resistance?

Resistance is a measure of how difficult it is for electric current to flow through a material. It is defined as the ratio of the voltage across the material to the current passing through it. Mathematically, resistance can be expressed as R = V/I, where R is the resistance, V is the voltage, and I is the current.

a) To determine the resistance of the wire, we can use Ohm's law, which states that the current (I) flowing through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R) of the conductor:

V = I × R

We have the voltage (V) and current (I) values, so we can calculate the resistance as follows:

R = V / I

R = 25.0 mV / 790 mA

R = 0.03175 Ω

b) The resistivity of a material is a measure of its resistance to the flow of electrical current. It is a property of the material and is independent of the size and shape of the conductor. The formula for resistivity is given by:

ρ = R × A / l

Where R is the resistance, A is the cross-sectional area of the wire, and l is its length. We have the resistance value, so we can calculate the resistivity as follows:

ρ = R * A / l

[tex]\mathrm{\rho = 0.03175 \Omega \times \pi \times \dfrac{ (2.3 mm / 2)^2 }{ 6.3 m} }[/tex]

ρ = 1.57 × 10⁻⁸ Ω m

c) The drift speed of electrons in a conductor is a measure of the average speed of the free electrons in the conductor. It is given by:

[tex]\mathbf{v_d}[/tex] = I / (nₑ × A)

Where I is the current, ne is the number of free electrons per unit volume, and A is the cross-sectional area of the wire. We have the drift speed and current values, so we can calculate the number of free electrons per unit volume as follows:

nₑ = I / ([tex]\mathrm{v_d}[/tex] × A)

[tex]\mathrm{n_e = \dfrac{790 mA}{ 1.8 \times 10^{-5} m/s \times \pi \times (2.3 mm / 2)^2} }[/tex]

nₑ = 1.05 × 10²⁸ m⁻³

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The proton's initial acceleration after being emitted is discovered to be 3.449 x 104 m/s².

because there is no magnetic force acting on a charged particle while it is at rest. The proton won't move or experience electric force unless it is forced out of its resting place. The direction of application of the electric force will match that of the acceleration.

In coulombs, the SI's measuring unit for electric charge, it is determined how much charge is transported by a flow of one amp for one second. The ability of a chemical to cause electrical and magnetic effects could potentially be one of its properties.

F = Kq1 q2 / r²

Charge of a proton = 1.6022 x 10⁻¹⁹ c

Mass of a proton = 1.6726 x 10⁻²⁷ kg

r= 2mm => 2 x 10⁻³m

k= 8.99 × 10⁹ N ⋅ m² /C².

F= 8.99 × 10⁹ x (1.6022 x 10⁻¹⁹)² / (2 x 10⁻³)²

  => 5.769 x 10⁻²³N

F = M x a

5.769 x 10⁻²³ = 1.6726 x 10⁻²⁷ x a

=> Acceleration = 3.449 x 10⁴m/s²

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The phase that the Earth would have when the Moon was full if we looked from the moon would be new phase.

The Moon and Earth are both always partially lit by the Sun. However, from either world, you can see varied portions of that lighted half - or different phases of the Earth or moon - at any given time. The phases usually follow a pattern in which they are inverted relative or reversed to one another.

Any moon resident would see a narrow crescent Earth when the moon is nearly full. The moon, Earth, and sun form a line with Earth in the middle when we observe a full moon. The Earth would then be completely obscured by the sun's brightness, making it invisible to those on the moon. Therefore, the phase that the Earth would have looked from the Moon would be the new phase because the opposite of a full moon phase is a new moon.

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The statement "Both its velocity and its acceleration are parallel to the x axis" best describes the motion of the box when the net force on the box is in the positive x direction.

If a net force acts on an object in the positive x direction, the object experiences an acceleration in the positive x direction. According to Newton's second law of motion, the acceleration of an object is proportional to the net force acting on it and inversely proportional to its mass. As a result, the object will move in the positive x direction with a continually increasing velocity. Therefore, both the velocity and acceleration of the box are parallel to the x axis.

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The number of pins that can be lifted depends on the potential difference of the battery.

You may create a weak magnet by coiling some copper wire and attaching the ends to a small battery. Coil your copper wire around an enormous iron nail to create an even more powerful electromagnet. Magnetic induction causes the nail to become into a magnet, strengthening the entire structure.

An investigation was done, wrapping copper wire around the nail and sticking it with tape to the battery.

The magnetic force depends on the potential difference of the battery.

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Answer:

it requires approximately 83.5812 Joules of work to lift the 7.1-kg backpack 1.2 m.

Explanation:

The work done to lift the backpack can be calculated using the formula:

Work = Force x Distance x cos(theta)

where Force is the weight of the backpack, Distance is the height it is lifted, and theta is the angle between the direction of the force and the direction of the displacement.

The weight of the backpack can be calculated as:

Weight = mass x gravity

where mass is 7.1 kg and gravity is the acceleration due to gravity, which is approximately 9.81 m/s^2.

Weight = 7.1 kg x 9.81 m/s^2

Weight = 69.651 N

The distance the backpack is lifted is 1.2 m.

The angle between the direction of the force and the direction of the displacement is 0 degrees, since the force and displacement are in the same direction.

Therefore, the work done to lift the backpack is:

Work = 69.651 N x 1.2 m x cos(0°)

Work = 83.5812 Joules (J)

So, it requires approximately 83.5812 Joules of work to lift the 7.1-kg backpack 1.2 m.

The work required to lift a 7.1-kg backpack 1.2 meters is approximately 83.5 Joules. This is calculated using the physics equation for work, which is Work = Force x Distance, where Force is the weight of the object.

In physics, the work done to lift an object is calculated by the equation Work = Force x Distance. The force required to lift an object is its weight, which is calculated by multiplying its mass by the gravitational acceleration (the approximate value is 9.8 m/s² on Earth).

So, to calculate the work done in lifting a 7.1-kg backpack 1.2 m, we would first calculate the force (or weight) required to lift the backpack: Force = Mass x Gravitational acceleration = 7.1 kg x 9.8 m/s² = 69.58 N.

Then we multiply this force by the distance the backpack is lifted: Work = Force x Distance = 69.58 N x 1.2 m = 83.5 Joules.

So the work required to lift the backpack is approximately 83.5 Joules.

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If P and Q are two longest paths in a connected graph then P and Q must have at least one vertex in common.

Let P and Q be two longest paths in a connected graph G. Assume for contradiction that P and Q have no vertices in common. Without loss of generality, let P start from vertex u and end at vertex v, and let Q start from vertex w and end at vertex x.

Since G is connected, there exists a path between u and w and a path between v and x. Let's consider the path between u and w first. By definition, both P and the path between u and w have u as a common vertex. If the path between u and w is longer than P, then it contradicts that P is the longest path. Hence, the path between u and w is shorter than P.

Similarly, the path between v and x must also be shorter than Q.

So, we have two paths of length less than the length of P and Q connecting vertices that are not on P or Q, which means that the concatenation of these two paths along with P and Q form a cycle. The length of this cycle must be longer than P and Q, which again contradicts the assumption that P and Q are the longest paths in G.

(b) Disprove: The statement is false. Consider a cycle of length k in the graph G. The two diametrically opposite vertices are two geodesics of length k, but they do not have any common vertices. This shows that the statement "If P and Q are two geodesics of length k in vertex in G, then P and Q have at least one common" is not always true.

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The number of moles of the air will be 1.6.

The equation of state for a fictitious ideal gas is known as the ideal gas law, also known as the general gas equation. Although it has some restrictions, it is a good approximation of the behaviour of many gases under various circumstances.

Given that an automobile tire has a volume of 0.0185 m ³. At a temperature of 294 K, the pressure in the tire is 212 kPa.

Calculate the volume at pressure P₂,

P₁V₁ = P₂V₂

V₂ = ( P₁V₁ ) / P₂

V₂ = ( 212 x 0.0185 ) / 252

V₂ = 0.0155 m³

The number of the moles will be calculated as:-

PV = nRT

n = ( P₂V₂ / RT)

n = ( 252 x 0.0155 x 1000 ) / ( 8.3145 x 294 )

n = 1.6 moles

Therefore, there will be 1.6 moles in the air.

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Sunlight to chemistry energy conversion, energy transfer as from sun to plants, kinetic energy is created by converting thermal energy. when wood is burned, mechanical energy is converted to thermal energy.

Chemical, electrical, infrared, mechanical, thermal, et nuclear energy are the six main types of energy. Different research may focus on other forms, such as electric, acoustic, electromagnetic, and some others.

Energy transition describes the change in the global energy industry away from fossil-based methods of hydropower, such as oil, natural gas, and coal, and toward rechargeable batteries with renewable sources of electricity like wind and solar.

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The 65th percentile can be found by using the formula: p(n + 1) = 65/100 * (8 + 1) = 65/100 * 9 = 5.85

So, the location of the 65th percentile in the ordered data set is approximately 5.85. This means that approximately 5 of the 8 values are below the 65th percentile, and the other 3 values are above it. To get an exact value, you would need to interpolate between the 5th and 6th values in the ordered data set.

Interpolation is a method of estimating values between two known values. To interpolate the value of the 65th percentile, you can use the following formula: value = (5.85 - 5) / (6 - 5) * (value at position 6 - value at position 5) + value at position 5

In this formula, "value at position 5" refers to the 5th value in the ordered data set, and "value at position 6" refers to the 6th value in the ordered data set. By substituting these values into the formula, you can find an estimate for the value of the 65th percentile.

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It is possible to write - v = u + at, v = 0 +1.2 x 60, v = 72 m/s by using the first motion equation.

Velocity is the pace and direction of such an item's movement, whereas pace is the time rate which an entity is travelling along a route.

A first equation of movement is given by Ms. Reitman's scooter velocity,

which accelerates at a rate of 1.2 m/s2 from rest.

The formula is: [a] = 2 m/s2 [t] = 60 s.

Thus, It is possible to write - v = u + at, v = 0 +1.2 x 60, v = 72 m/s by using the first motion equation.

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According to the problem This gives us a theoretical density of 6.1 g/cm^3.

Theoretical density is a calculation of the maximum amount of matter that a substance is able to contain in a specific amount of space, usually expressed in terms of grams per cubic centimeter.

The density of a material can be determined using Avogadro's number, which is[tex]6.02 x 10^23[/tex]mol^-1. The atomic mass of Ge is 72.59 g/mol, and the atomic radius of Ge is 1.225 Å.

To calculate the density, we must first calculate the volume of a single Ge atom. This can be done using the atomic radius, which gives us a volume of[tex]7.23 x 10^-23 cm^3.[/tex]

Next, we can calculate the number of atoms per unit volume by dividing Avogadro's number by the volume of a single atom. This gives us[tex]8.38 x[/tex][tex]1[/tex][tex]0^22 atoms/cm^3.[/tex]

Finally, we can calculate the density by multiplying the number of atoms per unit volume by the atomic mass. This gives us a theoretical density of 6.1 g/cm^3.

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A DC circuit with is driven by 12 volt supply and a DC load of 200 Ohms.  60 mA, 720 mW, so option (c) is correct.

What is circuit ?

A circuit is a closed circuit in which electrons can move.  No electrons will move unless the circuit is complete, that is, it makes a complete circuit around the electrical source.

The volt is a unit of electrical potential, potential difference, and electromotive force in the metre-kilogram-second (SI) system. It is equal to the difference in potential between two conductor points carrying one ampere of current when there is a one-watt power loss between the points.

Voltage current x Resistance

V=IR

Putting the the given values in the above equations So,

12 = I x 200

Or

I = 12/200

I = 0.06A (here A stands for ampere which is unit of current) And we know that 1A = 10 mA (mA stands for milliampere} So

I = 0.06A = 0.06 x 10 mA = 60mA

I = 60mA [Answer]

Here we use the formula P = V x I, which is describe as follows. Power = Voltage x current

we put the values in the above equation

P = 12 x 60

P = 720mW [here mW is stands for milli watt which is unit of power} P=720mW [Answer]

Therefore, A DC circuit with is driven by 12 volt supply and a DC load of 200 Ohms.  60 mA, 720 mW, so option (c) is correct.

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The 660 nm wavelength light is absorbed more by the hemoglobin and can be measured using the spectrophotometer.

The strength with which oxygen binds to hemoglobin is affected by several factors and can be expressed as a left or right shift in the oxygen dissociation curve. Shifting the curve to the right indicates that hemoglobin has a reduced affinity for oxygen, so oxygen is actively pumped out. Oxygen-hemoglobin saturation/dissociation curves are affected by pH, temperature, and 2,3-bisphosphoglycerate (BPG). The oxygen dissociation curve is a graph with oxygen partial pressure on the horizontal axis and oxygen saturation on the vertical axis, showing an S-shaped relationship. Oxygen and carbon dioxide are carried in the blood as a result of changes in blood pressure 

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The kinetic energy of the dart as it leaves the gun is 4 Joules, the dart speed is 10 m/s, and the minimum speed that a thrown ball would have to reach the ceiling is 19.8 m/s.

The kinetic energy of the dart can be calculated using the formula:

KE = PE

where PE is the potential energy stored in the spring, and KE is the kinetic energy of the dart.

Since 4 J of work was done in compressing the spring, the potential energy stored in the spring is 4 J. The kinetic energy of the dart can then be calculated as:

KE = PE = 4 J.

Therefore the kinetic energy of the dart as it leaves the gun is 4 Joules.

The speed of the dart can be calculated using the equation of kinetic energy:

KE = 0.5 × m × v²

where m is the mass of the dart and v is its speed. Substituting the values, we get:

4 J = 0.5 × 0.02 kg × v²

v² = (4 J) / (0.5 × 0.02 kg)

v = √((4 J) / (0.5 × 0.02 kg))

v = √400

v = 20 m/s.

Therefore, the speed of the dart is 20 m/s.

The minimum speed that a ball would have to have to reach the ceiling can be calculated using the equation of vertical motion:

v² = v_0² + 2 × a × h

where v is the final speed, v_0 is the initial speed (assumed to be 0), a is the acceleration due to gravity (9.8 m/s²), and h is the height of the ceiling (19.8 m).

v = √(2 × 9.8 × 19.8)

v = √(394.4)

v = 19.8 m/s.

So, the minimum speed that a ball would have to have to reach the ceiling is 19.8 m/s.

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Answer:Bernoulli developed his principle from observations on liquids, and Bernoulli's equation is valid for ideal fluids: those that are incompressible, irrotational, inviscid, and subjected to conservative forces.

Explanation:

Answer:

32.34 m/s

Explanation:

refer to the attachment

hope this helps

8 kg of the following bicycle masses will likely accelerate to 12 m/s the fastest assuming the mass of the rider is the same for all as lower the mass faster the acceleration will be. Thus, option A is correct

Mass is the physical property of a body which determines its resistance to acceleration when a net force is applied. It is measured in kilograms (kg) or pounds (lbs) and is proportional to the amount of matter the body contains. Mass is an intrinsic property of matter, meaning it cannot be altered by changing the shape, size or temperature of a body. Mass is often confused with weight, which is the measure of the gravitational force on an object, and should not be used interchangeably.

The total mass of the graduated cylinder and the water for the three measurements would depend on the individual masses of each measurement. For example, if the measurements were 10mL, 20mL, and 30mL of water respectively, the total mass of the graduated cylinder and the water would be the sum of the individual masses. Assuming the density of the water is 1g/mL, the total mass of the graduated cylinder and the water for the three measurements would be 40g. If the measurements were 20mL, 40mL, and 60mL of water respectively, the total mass of the graduated cylinder and the water for the three measurements would be 120g.

a = F/m

Let F be 10

a = 10/m

When m = 1

a = 10/1

= 10

When m = 10

a = 10/1

= 10/10

= 1

Thus, lower value of mass will give higher value of acceleration.

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The relation between, the acceleration due to gravity at a given location and when that locations distance from the planets center is doubled, in that case acceleration due to gravity will be 4  times less than at given location.

Acceleration is a vector quantity that describes the rate at which an object changes its velocity. It is the rate at which the velocity of an object changes in magnitude or direction, or both. In other words, it tells us how quickly an object is speeding up or slowing down. Acceleration has units of meter per second squared (m/s²) and its direction is the same as the direction of the change in velocity.

The acceleration due to gravity decreases as the distance from the center of the planet is doubled.

The formula for gravitational acceleration is given by:

g = G x M / r^2,

where G is the gravitational constant, M is the mass of the planet, and r is the distance from the center of the planet.

As r doubles, the value of g decreases by a factor of 4.

Hence, the acceleration due to gravity will 4 times less.

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In this scenario, if balloon X is negatively charged and is repelled by balloon Y, then it is most likely that balloon Y is positively charged. If an object Z is attracted to balloon Y, then it is most likely that object Z is either negatively charged or neutral. Therefore, the charge on object Z could be either option a or c, which are negative or neutral respectively.

In the given scenario in this question, balloon X has a negative charge and is repelled by balloon Y. This suggests that balloon Y has a positive charge. The attraction of object Z to balloon Y indicates that it is either negatively charged or neutral.

Therefore, the charge on object Z is either negative or neutral, but not positive or indeterminate. This is due to the fundamental principle of electrical charges, where opposite charges attract each other and similar charges repel each other.

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If two transverse wave points which have the identical magnitude of departure from equilibrium share the same orientation of departure and motion, the points are said to be in phase.

In theoretical particle 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 a term for describing the size or breadth of something.

Vectors contain quantities that include both both magnitude and direction. The terms force, momentum, displacement, and velocity are all examples of vector quantities. We refer to something like a vector's length as its absolute value. Only if the measured values of two vectors are equal can we draw the conclusion that they are similar.

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The 2.4 to 5 GHz band is used by a variety of wireless networks. Also, the speed that each sort of wireless network offers varies.

Seconds per meter Miles per hour, kilometres per hour, and meters per second (m/s) are the most popular speed measurement units (mph). An object's speed is the distance it travels in a predetermined length of time. The speed equation is defined as speed = distance x time.

If you know how far an object travels in a certain amount of time, you can calculate its speed. For instance, if a car travels 70 miles in an hour, it is going at a speed of 70 miles per hour.

Depending on where and how you use your Wi-Fi connection the most, you should choose between 2.4 GHz and 5 GHz.

Therefore, while a 5 GHz connection offers greater speeds at closer distances, a 2.4 GHz connection travels farther at slower speeds.

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(a) Star B are moving towards the earth while star A and C are moving away from Earth.

(b) The star that is moving the fastest star C because its wavelength is the highest.

The speed of an object like star is measured from the speed and wavelength of the corresponding star.

Mathematically, the relationship between speed and wavelength of a particle is given as;

v = fλ

where;

If a star is moving towards Earth, it appears to emit light that is shorter in wavelength compared to a source of light that isn't moving.

So star B are moving towards the earth while star A and C are moving away from Earth

The star that is moving the fastest will have the highest wavelength, hence star C is the fastest.

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