2. convert the following voltage ratios to db: a. 2 x10−4 b. 3000 c. √30 d. 6/(5 x 104)

To find the magnitude of the average force on the wall, we can use the impulse-momentum principle, which states that the change in momentum of an object is equal to the impulse applied to it.

The impulse can be calculated by multiplying the force and the duration of the collision:

Impulse = Force × Duration

The momentum of the snowball can be calculated by multiplying its mass and velocity:

Momentum = Mass × Velocity

Since the snowball hits and sticks to the wall, its final velocity will be zero. Therefore, the change in momentum is equal to the initial momentum:

Change in Momentum = Initial Momentum = Mass × Velocity

Now, we can equate the impulse to the change in momentum:

Force × Duration = Mass × Velocity

We can rearrange this equation to solve for the force:

Force = (Mass × Velocity) / Duration

Given:

Mass = 130 gg = 130 g = 0.13 kg

Velocity = 6.5 m/s

Duration = 0.15 s

Substituting these values into the equation, we get:

Force = (0.13 kg × 6.5 m/s) / 0.15 s

Calculating this expression gives:

Force = 5.63333... N

Rounding this to two significant figures gives:

Force ≈ 5.6 N

Therefore, the magnitude of the average force on the wall is approximately 5.6 N.

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The magnetic field strength is 0.420 Tesla.

The torque (τ) on a square coil of side length L, carrying a current I, placed parallel to a uniform magnetic field B is given by:

τ = (BIL)^2 / (2π)

Rearranging this formula, we can solve for the magnetic field strength B:

B = √(2πτ / IL)^2

Substituting the given values, we get:

B = √[(2π)(0.330×10^-3 Nm) / (6.22 A)(0.222 m)]^2

B = 0.420 T

The torque acting on a current-carrying loop in a magnetic field can be calculated using the formula:

τ = N * B * A * sin(θ)

Where:

τ is the torque,

N is the number of turns in the loop,

B is the magnetic field strength,

A is the area of the loop, and

θ is the angle between the magnetic field and the normal to the loop.

In the given problem, the torque is given as 0.330 mN (millinewtons) and the number of turns in the loop is 1.

So, the torque equation can be written as:

0.330 mN = 1 * B * A * sin(θ)

To find the magnetic field strength B, we need to know the values of the area of the loop (A) and the angle (θ) between the magnetic field and the normal to the loop. If those values are provided, we can solve for B using the given torque.

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True. a lens can be used to start a fire by focusing an image of the sun onto a piece of flammable material.

A lens can indeed be used to start a fire by focusing sunlight onto a piece of flammable material. This phenomenon is based on the principle of concentrating light energy into a small area, which can generate enough heat to ignite flammable substances. When a convex lens is used to focus sunlight, it converges the incoming rays to a point called the focal point. If a flammable material is placed at the focal point, the concentrated sunlight can raise the temperature of the material to its ignition point, causing it to catch fire. This method is commonly demonstrated using a magnifying glass or other similar lenses. However, caution should be exercised when using this technique, as it can pose a fire hazard if not used responsibly.

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When we observe the unprocessed Cosmic Microwave Background signal, the redshifted end indicates that our Galaxy is moving away from it, while the blueshifted end suggests that our Galaxy is moving towards it.

The Cosmic Microwave Background (CMB) is the radiation leftover from the early stages of the Universe, which provides valuable insights into its properties. When we analyze the CMB signal, we observe that one end is redshifted, meaning the wavelengths of the radiation are stretched, while the opposite end is blueshifted, indicating compressed wavelengths.

The redshifted end of the CMB suggests that our Galaxy is moving away from it. This is consistent with the expanding nature of the Universe, where distant objects are moving away from each other due to the overall expansion of space.

Conversely, the blueshifted end of the CMB indicates that our Galaxy is moving towards it. This motion is relative to the reference frame of the CMB signal.

Overall, the redshifted and blueshifted regions in the CMB allow us to understand the motion and structure of our Galaxy in relation to the early Universe.

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Increasing the wedge angle of an interferometer causes the spacing of interference fringes to decrease.

This is because the wedge angle determines the path difference between the interfering waves, and a larger wedge angle means a larger path difference. However, if the wedge angle is too large, fringes may not be observed at all. This is because the path difference between the interfering waves becomes so large that the fringes become too closely spaced to be resolved by the detector.

Additionally, if the wedge angle is too large, the reflected and transmitted beams may not overlap sufficiently to interfere with each other, leading to a loss of fringe visibility. Path lengths, leading to a higher spatial frequency of fringes. If the wedge angle becomes too large, the fringes may no longer be observed.

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The M16A3 service rifle has a maximum effective range of about 600 meters. This range represents the distance at which it can consistently hit a human-sized target with a high likelihood of incapacitation.

The M16A3 service rifle, chambered in 5.56×45mm NATO, has a maximum effective range of around 600 meters. This refers to the distance at which the weapon can consistently hit a human-sized target with a high probability of incapacitation.

The rifle utilizes a 20-inch barrel length, which allows for better bullet stabilization and accuracy at longer distances compared to shorter barrels. The 5.56×45mm NATO round fired by the M16A3 has a relatively flat trajectory, making it effective at medium ranges.

However, beyond 600 meters, the bullet starts to lose energy and accuracy, reducing its effectiveness in engaging targets. It's worth noting that individual shooter skill, environmental conditions, and target characteristics can also impact the rifle's effective range in practice.

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To resolve an object as small as 2x10^(-10) m using an electron microscope, the electrons need to have a minimum kinetic energy. By applying the de Broglie wavelength equation, we can calculate the minimum kinetic energy required in joules.

According to the de Broglie wavelength equation, the wavelength of a particle is inversely proportional to its momentum. The equation is given by:

λ = h / p

where λ is the wavelength, h is the Planck's constant, and p is the momentum. In this case, we can consider the electrons as particles with a known mass. By rearranging the equation to solve for momentum (p = mv) and substituting the given wavelength (λ = 2x10^(-10) m), we can calculate the momentum. With the momentum known, we can determine the kinetic energy using the formula E = (1/2)mv^2. Thus, by solving these equations, we can find the minimum kinetic energy required in joules for the electrons in the electron microscope.

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The melting point of the liquid is 368.3°C.   The melting point of a substance is the temperature at which it changes from a solid to a liquid state. To determine the melting point of the liquid, we need to find the temperature at which the vapor pressure of the liquid is equal to the vapor pressure of the pure liquid at that temperature. This temperature is called the boiling point of the liquid.

We can use the formula:

Melting point = Boiling point - Vapor pressure of pure liquid at boiling point

where the vapor pressure of pure liquid at boiling point is given by the equation:

P_vapor = ρ * L * ln(1/P_a)

where ρ is the density of the liquid, L is the latent heat of vaporization, and P_a is the vapor pressure of the pure liquid at its boiling point.

We can use the given value of the boiling point (383°C) to find the vapor pressure of the pure liquid at that temperature:

P_vapor = ρ * L * ln(1/P_a)

P_vapor = 1180 [tex]kg/m^3[/tex] * 235 kJ/kg * ln(1/8.314 J/kg·K)

P_vapor = 1.63 x[tex]10^5[/tex] Pa

Now we can find the melting point of the liquid:

Melting point = Boiling point - Vapor pressure of pure liquid at boiling point

Melting point = 383°C - 1.63 x [tex]10^5[/tex] Pa

Melting point = 368.3°C

Therefore, the melting point of the liquid is 368.3°C.  

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The image of a 2.60 cm high insect located 1.36 m from a lens with a focal length of 135 mm will be formed behind the lens.

In this scenario, we can determine the position of the image formed by using the lens equation:

1/f = 1/d_o + 1/d_i

where f is the focal length of the lens, d_o is the object distance, and d_i is the image distance. Given that the insect is located 1.36 m (136 cm) from the lens and the focal length of the lens is 135 mm (13.5 cm), we can substitute these values into the lens equation. Solving for d_i, we find that the image distance is positive, indicating that the image is formed behind the lens. Therefore, the image of the insect will be located behind the lens.

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Potential contamination or changes in the atmospheric carbon-14 levels over time can affect the accuracy of the age estimation. To determine the age of the fire pit, we need to use the concept of the half-life of carbon-14 and its decay equation.

The half-life of carbon-14 is 5,730 years, which means that after 5,730 years, half of the carbon-14 in a sample will have decayed.

Carbon-14 dating relies on measuring the activity of carbon-14 in a sample. The activity is given in becquerels (Bq), which represents the number of radioactive decays per second.

Given that the carbon-14 activity of the charcoal from the fire pit is 0.121 Bq per gram of carbon, we can use this information to determine the age of the fire pit.

First, we need to convert the carbon-14 activity into a decay constant. The decay constant (λ) can be calculated using the formula:

λ = ln(2) / half-life

λ = ln(2) / 5730 years (using the half-life of carbon-14)

Next, we can use the decay equation to find the age of the fire pit. The decay equation is given by:

N(t) = N₀ * e^(-λt)

where N(t) is the current amount of carbon-14, N₀ is the initial amount of carbon-14, λ is the decay constant, and t is the time in years.

We can rearrange the equation to solve for t:

t = -ln(N(t) / N₀) / λ

Given that the current activity (N(t)) is 0.121 Bq/g and assuming the initial activity (N₀) was higher (as carbon-14 decays over time), we can estimate an initial activity and calculate the age:

N₀ = 10 * N(t) (assuming an initial activity that is roughly ten times higher)

t = -ln(0.121 Bq/g / (10 * 0.121 Bq/g)) / λ

Now we can calculate the age using the above equation.

Please note that this calculation assumes certain simplifications and approximations. Additionally, other factors such as potential contamination or changes in the atmospheric carbon-14 levels over time can affect the accuracy of the age estimation. Advanced techniques and further analysis are often employed in radiocarbon dating to obtain more precise results.

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The addition of velocities of things like airplanes and wind speed does not require the use of the special theory of relativity.

The special theory of relativity deals with the behavior of objects traveling at or near the speed of light. When objects are moving at these speeds, time dilation, length contraction, and other relativistic effects come into play. However, airplanes and wind speeds are nowhere near these velocities.

The addition of velocities in classical mechanics, which is the study of how objects move without considering the effects of relativity, is straightforward. When two objects are moving in the same direction, their velocities add together. When they are moving in opposite directions, their velocities subtract from each other. This is known as the principle of Galilean relativity.

In summary, the addition of velocities of airplanes and wind speed does not require the use of the special theory of relativity. Instead, it can be analyzed using classical mechanics and the principle of Galilean relativity.

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The wavelength of the sound waves in front of the locomotive is approximately 18.42 meters.

To calculate the wavelength, we can use the formula: wavelength = speed of sound / frequency.

First, we need to find the speed of sound in still air, which is approximately 343 m/s.

Since the train is moving, we need to account for the Doppler effect.

The adjusted speed of sound is 343 m/s - 26.0 m/s = 317 m/s. Now, we can find the wavelength: wavelength = 317 m/s / 420 Hz ≈ 18.42 meters.

Summary: Taking into account the Doppler effect, the wavelength of the sound waves emitted by the locomotive whistle is approximately 18.42 meters.

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A typical size for a giant molecular cloud (GMC) can range from about 10 to 1000 light-years in diameter, with masses ranging from 10,000 to several million solar masses. These massive clouds are composed primarily of molecular hydrogen and are the birthplaces of new stars.

A typical size for a giant molecular cloud (GMC) can vary widely, as these structures come in a range of sizes. GMCs are massive interstellar clouds predominantly composed of molecular hydrogen (H2), along with other molecules like carbon monoxide (CO) and dust particles.On average, giant molecular clouds can have sizes ranging from about 10 to 300 light-years across. However, some GMCs can be significantly larger, extending up to several hundred light-years or even reaching dimensions of thousands of light-years.The size of a GMC depends on various factors, including the local environment, gravitational forces, and interactions with neighboring clouds or stellar systems. GMCs serve as birthplaces for new stars and play a crucial role in the process of star formation within galaxies.

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The new capacitance is four times the original capacitance, and the correct answer is (c) 4C.

The capacitance of a parallel plate capacitor is given by:

C = εA/d

where ε is the permittivity of the medium between the plates, A is the area of each plate, and d is the distance between the plates.

For a square parallel plate capacitor, the area of each plate is A = L^2.

When the length of the sides of the plates is changed to 2L, the new area of each plate is A' = (2L)^2 = 4L^2.

The distance between the plates remains the same as d.

Using the capacitance formula, the new capacitance C' is:

C' = εA'/d

C' = ε(4L^2)/d

We can express this in terms of the original capacitance C by using the fact that C = εA/d:

C' = 4C

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In the context of wildland fire, a significant portion of areas burned can be attributed to a small percentage of fires that escape initial attack. the correct choice would be option 5, which states that 10-15% of fires that escape initial attack account for 95% of the areas burned.

Fire suppression efforts aim to quickly respond and contain fires during their initial stages. However, despite these efforts, a small percentage of fires manage to escape initial attack and grow into larger, more destructive fires. These escaped fires can spread rapidly and cover extensive areas, resulting in a disproportionate amount of total burned area. According to the given options, it is stated that 10-15% of fires that escape initial attack contribute to 95% of the areas burned. This emphasizes the significant impact and challenges posed by a small fraction of fires that manage to evade initial suppression efforts.

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The depth of the swimming pool is approximately 1.56 meters. The angle between the hypotenuse and the base of the triangle is 20 degrees, which is the same as the angle of elevation of the sun.

To determine the depth of the swimming pool, we can use the concept of similar triangles and the angle of elevation of the sun.

Let's consider the situation where the sun is 20 degrees above the horizon and the bottom of the pool becomes completely shaded. We can form a right triangle with the vertical height representing the depth of the pool, the horizontal base representing the width of the pool, and the hypotenuse representing the distance from the top of the pool to the sun's position.

The angle between the hypotenuse and the base of the triangle is 20 degrees, which is the same as the angle of elevation of the sun.

Using trigonometry, we can use the tangent function to relate the angle and the sides of the triangle:

tan(20°) = depth of the pool / width of the pool

Let's solve the equation for the depth of the pool:

depth of the pool = tan(20°) * width of the pool

Given that the width of the pool is 4.3 meters, we can substitute the values and calculate the depth of the pool:

depth of the pool = tan(20°) * 4.3 m

Using a calculator, we find:

depth of the pool ≈ 1.56 m

Therefore, the depth of the swimming pool is approximately 1.56 meters.

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The reflected ray can be either completely polarized or partially polarized, depending on the angle of incidence. To observe the reflected ray for other angles of incidence, one can use a polarizing filter.

When light reflects off a surface, the reflected ray can be either completely polarized or partially polarized, depending on the angle of incidence. When the angle of incidence is such that the reflected ray is perpendicular to the surface, the reflected ray is completely polarized, meaning that it vibrates in only one plane. This is called plane polarization.

However, when the angle of incidence is not perpendicular to the surface, the reflected ray is partially polarized, meaning that it vibrates in more than one plane. This is called elliptical polarization. The degree of polarization depends on the angle of incidence, the nature of the surface, and the wavelength of the light.

To observe the reflected ray for other angles of incidence, one can use a polarizing filter. This is a material that allows only light vibrating in a certain plane to pass through, while blocking light vibrating in other planes. By rotating the filter and observing the reflected light through it, one can determine the degree of polarization of the reflected light.

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To calculate the person's power output, we can use the formula:

Power = Work / Time

The work done by the person can be calculated as the product of force and distance:

Work = Force * Distance

In this case, the force is the person's weight, which is given as 600 N, and the distance is the vertical height of the stairs, which is 20 meters.

Work = 600 N * 20 m = 12,000 J (joules)

The time taken to climb the stairs is given as 10 seconds.

Now, we can substitute the values into the power formula:

Power = 12,000 J / 10 s = 1,200 W (watts)

Therefore, the person's power output is 1,200 W.

The correct answer is (a) 1,200 W.

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he magnification of the image is -8.0.

(a) The distance of the object from the mirror is given by:

d_o = 1.25 cm

The distance of the image from the mirror is given by:

d_i = -10.0 cm (since the image is formed behind the mirror, its distance is negative)

The mirror equation relates the focal length (f) of the mirror, the object distance (d_o), and the image distance (d_i):

1/f = 1/d_o + 1/d_i

Substituting the given values, we get:

1/f = 1/1.25 cm + 1/(-10.0 cm)

Solving for f, we get:

f = -6.25 cm

The negative sign for f indicates that the mirror is concave.

The radius of curvature (R) of the mirror is related to the focal length by:

f = R/2

Substituting the value of f, we get:

R = 2f = 2(-6.25 cm) = -12.5 cm

The negative sign for R indicates that the mirror is concave.

Therefore, the radius of curvature of the mirror is -12.5 cm.

(b) The magnification (m) of the image is given by:

m = -d_i/d_o

Substituting the given values, we get:

m = (-10.0 cm) / (1.25 cm) = -8.0

The negative sign for m indicates that the image is inverted relative to the object.

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Using the right-hand rule for magnetic fields, the subsequent motion of the proton will depend on the relationship between its velocity and the magnetic field direction.

To determine the direction of the subsequent motion, we can use the right-hand rule for magnetic fields. According to the rule, if we point the thumb of our right hand in the direction of the velocity vector of the proton and curl our fingers towards the magnetic field direction, the subsequent motion will be in the direction perpendicular to both the velocity and magnetic field vectors.

Based on the given velocity vector and the direction of the magnetic field, we can apply the right-hand rule to find the direction of the subsequent motion. If the resulting direction is clockwise, the orbit will be clockwise; if it is counterclockwise, the orbit will be counterclockwise.

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Where E is the energy stored in the capacitor, C is the capacitance of the capacitor, and V is the voltage across the capacitor. To show that the energy stored in the capacitor is given by this formula, we can use the following derivation: Consider a capacitor with capacitance C and charge Q.
V = Q/C

This work done is equal to the energy stored in the capacitor. So, the energy stored in the capacitor is given by: We can also express Q in terms of V using: Q = CV Substituting this into the equation for energy, we get: E = 1/2 CV^2 Which is the same formula we started with. Therefore, we have shown that the energy stored in a capacitor is given by:

Identify the capacitance (C) and initial voltage (V) of the capacitor. These values are usually given in the problem or can be found using other provided information. Square the initial voltage (V^2). Multiply the capacitance (C) by the squared initial voltage (V^2).
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The weight of the lightweight pair of running shoes with a mass of 0.085 kg is 0.83 N.

Weight is the force exerted on an object due to gravity. It can be calculated using the formula weight = mass * gravitational acceleration. In this case, the mass of the shoes is given as 0.085 kg. The gravitational acceleration on Earth is approximately 9.8 m/s². By multiplying the mass and the gravitational acceleration, we can find the weight:

weight = 0.085 kg * 9.8 m/s² = 0.833 N.

Therefore, the weight of the lightweight pair of running shoes is approximately 0.83 N.

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To find the electric potential difference between points A and B, we can use the formula:

ΔV = kQ / r

Where ΔV is the electric potential difference, k is the electrostatic constant (9 × 10^9 N⋅m²/C²), Q is the charge, and r is the distance between the points.

In this case, we have two charges of magnitude 6 µC located at x = 4 m and x = -4 m on the x-axis. The distance between each charge and point A is:

r₁ = √(x₁² + y₁²) = √(4² + 6²) = √(16 + 36) = √52 = 2√13 m

r₂ = √(x₂² + y₂²) = √((-4)² + 6²) = √(16 + 36) = √52 = 2√13 m

The electric potential difference at point A due to each charge is:

ΔV₁ = kQ / r₁ = (9 × 10^9 N⋅m²/C²)(6 × 10^-6 C) / (2√13 m)

ΔV₂ = kQ / r₂ = (9 × 10^9 N⋅m²/C²)(6 × 10^-6 C) / (2√13 m)

Since the charges are identical and have the same magnitude, the total electric potential difference at point A is:

ΔV_A = ΔV₁ + ΔV₂

Next, we calculate the electric potential difference at point B due to each charge. The distance between each charge and point B is:

r₃ = |x₃ - x₁| = |8 - 4| = 4 m

r₄ = |x₄ - x₂| = |8 - (-4)| = 12 m

The electric potential difference at point B due to each charge is:

ΔV₃ = kQ / r₃ = (9 × 10^9 N⋅m²/C²)(6 × 10^-6 C) / (4 m)

ΔV₄ = kQ / r₄ = (9 × 10^9 N⋅m²/C²)(6 × 10^-6 C) / (12 m)

Since the charges are identical and have the same magnitude, the total electric potential difference at point B is:

ΔV_B = ΔV₃ + ΔV₄

Finally, the electric potential difference between points A and B is:

ΔV = ΔV_B - ΔV_A

Calculate the values using the given charges and distances to find the specific electric potential difference.

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The analysis of forces/moments acting The analysis of forces/moments acting on an object over a given time and its initial and final velocities points to the use of the Principle of Impulse and Momentum.

The analysis of forces/moments acting on an object over a given distance and its initial and final velocities points to the use of the Principle of Work and Energy.

Newton's Second Law relates the net force acting on an object to its acceleration. By analyzing the forces/moments acting on an object and its resulting acceleration/angular acceleration, Newton's Second Law can be used to understand and quantify the relationship between these variables.

The Principle of Impulse and Momentum, on the other hand, relates the change in momentum of an object to the impulse applied to it. When analyzing forces/moments acting on an object over a given time and considering its initial and final velocities, the Principle of Impulse and Momentum is used to understand the change in momentum and the effect of the applied forces.

Lastly, the Principle of Work and Energy relates the work done on an object to its change in energy. When analyzing forces/moments acting on an object over a given distance and considering its initial and final velocities, the Principle of Work and Energy is used to understand the energy transfer and the relationship between work and change in energy.

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When a current flows through a metal wire, the moving charges are predominantly only electrons.

In metals, electrons are the primary charge carriers, responsible for the flow of electric current. These electrons are loosely bound to their parent atoms, forming a "sea of electrons" that allows them to move freely throughout the material. This characteristic is what gives metals their high electrical conductivity.

On the other hand, protons are not free to move within the metal lattice. They are part of the atomic nucleus and are held together by strong nuclear forces, making them unable to contribute to the flow of electric current. Therefore, the option "both protons and electrons" is incorrect, as is "none of these."

Thus, when an electric current flows through a metal wire, it is mainly due to the movement of electrons as charge carriers, and not protons or any combination of the two. This fundamental property enables metals to be effective conductors of electricity.

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In the context of studying electron screening in multielectron atoms, we are given a table of experimental data for the ionization energies of alkali metals. We are tasked with converting the given values, which are in kJ/mol, to the energy in electron volts (eV) required to ionize one atom of each element. Specifically, we need to convert the ionization energies for Li, Na, K, and Rb.

By applying the appropriate conversion factor to each given value, we can determine the energy in eV required to ionize one atom of each alkali metal.

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The torque due to the weight of the ladder shooting about its base

is  mgLcosθ/2.

Given information,

Mass of ladder, m

Length of the ladder, l

angle, θ

Perpendicular distance,  Lcosθ/2

The force that can cause an object to rotate along an axis is measured as torque. Torque is a vector quantity, the direction of the torque vector determines by the direction of the force on the axis.

Torque = Force × perpendicular distance

According to the question,

F = mg

Torque = mg×(Lcosθ)/2

Torque = mgLcosθ/2

Hence, mgLcos/2 is the torque produced by the weight of the ladder shoot around its base.

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The motion of a charged particle in a uniform magnetic field is circular, and the radius of the circular path can be determined using the equation:

r = (mv)/(qB)

where r is the radius of the circular path, m is the mass of the electron, v is its velocity, q is the charge on the electron, and B is the magnetic field strength.

(a)The radius of the circular path is 0.0281 m.

To find the radius of the circular path, we plug in the given values:

r = [(9.11 × 10^-31 kg) × (1.50 × 10^7 m/s)] / [(1.60 × 10^-19 C) × (2.00 × 10^-3 T)]

r = 0.0281 m

(b)The time interval required to complete one revolution is 3.74 × 10^-8 seconds.

The time interval required to complete one revolution can be found using the formula:

T = (2πr)/v

where T is the time period and π is the mathematical constant pi (3.14159...)

Plugging in the values, we get:

T = (2π × 0.0281 m) / (1.50 × 10^7 m/s)

T = 3.74 × 10^-8 s

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To solve this problem, we can use the Doppler effect equation for sound waves:

f' = (v + vr) / (v + vs) * f

Where:

f' is the observed frequency,

v is the speed of sound,

vr is the velocity of the receiver (cyclist),

vs is the velocity of the source (wall),

f is the actual frequency of the tuning fork,

and the beat frequency is the difference between the observed frequency and the actual frequency.

Given:

Actual frequency of the tuning fork (f) = 474 Hz

Speed of sound (v) = 343 m/s

Beat frequency = 29.0 Hz

We are looking for the velocity of the receiver (cyclist), vr.

Using the information provided, we can rearrange the Doppler effect equation to solve for vr:

vr = [(f' / f) - 1] * (v + vs)

Substituting the known values:

vr = [(f' / f) - 1] * (v + vs)

vr = [(474 Hz + 29.0 Hz) / 474 Hz - 1] * (343 m/s + 0 m/s)

vr = (503 Hz / 474 Hz - 1) * 343 m/s

vr = (1.06197 - 1) * 343 m/s

vr = 0.06197 * 343 m/s

vr = 21.3 m/s

Therefore, the velocity of the cyclist (vr) is approximately 21.3 m/s.

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