To fully describe the ejection of electrons from a metal's surface, scientists
must consider which of the following to be quantized?

A. Matter only
B. Light only
C. Both light and matter
D. Neither light nor matter

The stars that stay on the main sequence for billions of years are called "main sequence stars".

A main sequence star is a star that is in the longest and most stable phase of its life. During this phase, the star is fusing hydrogen in its core to form helium, which releases energy and provides the pressure needed to counteract the gravitational collapse of the star. These stars are powered by nuclear fusion reactions that occur in their cores, which allow them to maintain a stable balance between gravity pulling inwards and pressure pushing outwards. The exact length of time that a star will stay on the main sequence depends on its mass, with lower-mass stars having longer lifetimes. However, even the longest-lived main sequence stars will eventually exhaust their fuel and evolve into different types of stars.

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The inductance of the solenoid is 2.54 millihenries.

To determine the inductance of a solenoid, we can use the formula:

L = (μ * N^2 * A) / l

where L is the inductance in henries, μ is the permeability of the core material (assumed to be air for this problem), N is the number of turns, A is the cross-sectional area of the solenoid, and l is the length of the solenoid.

We are given that the solenoid has 660 turns, a length of 34 cm, and a circular cross-section with a radius of 4.6 cm.

To find the cross-sectional area A, we can use the formula for the area of a circle:

A = π * r^2

where r is the radius.

Plugging in the given value for the radius, we get:

A = π * (4.6 cm)^2 = 66.67 cm^2

Now we can use the formula for inductance:

L = (μ * N^2 * A) / l

Plugging in the given values, we get:

L = (4π x 10^-7 H/m * (660)^2 * 66.67 x 10^-4 m^2) / 0.34 m

L = 2.54 x 10^-3 H

The inductance of the solenoid is 2.54 millihenries.

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Insufficient information provided to calculate change in momentum. More details are required about the puck's initial and final velocities or accelerations.

Momentum is defined as the product of an object's mass and its velocity. Without knowing the initial and final velocities or accelerations of the puck, it is impossible to calculate its change in momentum. Insufficient information provided to calculate change in momentum. More details are required about the puck's initial and final velocities or accelerations.   In order to calculate the change in momentum, one would need to know the mass of the puck and the forces acting upon it during the time interval of interest.

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A. The RMS current through the capacitor is 12.2 μA

B. The maximum current through the capacitor is 17.25 μA

To find the RMS current through a 0.016 μF capacitor with an RMS voltage of 2.3 V at a frequency of 53 Hz, we'll use the following formula:
RMS current (I) = RMS voltage (V) / Capacitive reactance (Xc)

First, let's calculate the capacitive reactance (Xc):
Xc = 1 / (2 * π * f * C)
where f is the frequency (53 Hz) and
C is the capacitance (0.016 μF or 16 *[tex]10^{-9[/tex] F).

Xc = 1 / (2 * π * 53 * 16 * 10^-9)
Xc ≈ 188.401 Ω

Now, we can find the RMS current:
I = 2.3 V / 188.401 Ω
I ≈ 0.0000122 A or 12.2 μA

A) The RMS current through the capacitor is 12.2 μA.

For part B, we know that the maximum current (Imax) is √2 times the RMS current:
Imax = √2 * I
Imax = √2 * 12.2 μA
Imax ≈ 17.25 μA

B) The maximum current through the capacitor is 17.25 μA.

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To determine the initial acceleration of the steel shuttle, we need to use Newton's second law of motion, which states that the acceleration of an object is proportional to net force acting on it and inversely proportional to mass. A) initial acceleration of the steel shuttle is 14.24 [tex]m/s^2.[/tex]

The net force on the shuttle is the tension in the elastic cord minus the force due to friction between the shuttle and the rail. We can write this as: Fnet = T - f where Fnet is the net force, T is the tension in the elastic cord, and f is the force due to friction.

To find the tension in the elastic cord, we can use the force components in the x and y directions: [tex]Tx = T cos(45°) = T/√2 Ty = T sin(45°) = T/√2[/tex]Since the tension is given as 23.0 N, we have: Tx = Ty = [tex]23.0 N/√2[/tex]

The force due to friction can be calculated using the coefficient of friction between steel and steel, which is typically around 0.6: f = μN where N is the normal force, which is equal to the weight of the shuttle, and μ is the coefficient of friction.

The weight of the shuttle can be found using the formula: W = mg where W is the weight, m is the mass, and g is the acceleration due to gravity.

We have: W = [tex]0.820 kg x 9.81 m/s^2[/tex]  = 8.05 N Therefore: f = 0.6 x 8.05 N = 4.83 N The net force on the shuttle is: Fnet = T - f = 23.0 N/√2 - 4.83 N = 11.67 N

Finally, we can use Newton's second law to calculate the acceleration of the shuttle: a = Fnet / m = 11.67 N / 0.820 kg = 14.24 [tex]m/s^2[/tex]Therefore, the initial acceleration of the steel shuttle is 14.24 [tex]m/s^2.[/tex]

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The probability of finding the electron at a distance greater than 7.8 α0 from the proton is 2.3 × 10⁻⁵.

The probability of finding the electron at a distance greater than 7.8 α0 from the proton can be obtained by integrating the radial probability density function, which is given by:

                   P(r) = 4πr² |ψ(r)|²

where |ψ(r)|² is the square of the wave function, which in this case is:

                  |ψ(r)|² = (α/πα0³) * e^(-2r/α0)

Here, α is a normalization constant such that the integral of |ψ(r)|² overall space equals 1.

To find the probability of finding the electron at a distance greater than 7.8 α0, we need to integrate P(r) from 7.8 α0 to infinity:

                 P(>7.8 α0) = ∫7.8α0∞ P(r) dr

Substituting the expression for P(r) and performing the integration, we get:

                P(>7.8 α0) = 1 - ∫0^7.8α0 P(r) dr

                P(>7.8 α0) = 1 - (α/α0³) ∫0^7.8α0 r² e^(-2r/α0) dr

This integral can be evaluated numerically to obtain:

P(>7.8 α0) ≈ 2.3 × 10⁻⁵

Therefore, the probability of finding the electron at a distance greater than 7.8 α0 from the proton is approximately 2.3 × 10⁻⁵.

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Answer:

1.9 × 10^-25 N

Explanation:

The magnitude of the magnetic force on a moving charged particle in a magnetic field is given by:

F = qvB sin(theta)

where F is the force on the particle, q is the charge of the particle, v is the velocity of the particle, B is the magnetic field, and theta is the angle between the velocity and the magnetic field.

In this problem, the electron is moving perpendicular to the magnetic field, so theta = 90 degrees, and sin(theta) = 1. Also, the charge of an electron is -1.6 × 10^-19 C.

Plugging in the given values, we get:

F = (-1.6 × 10^-19 C) × (3.0 × 10^4 m/s) × (0.40 T) × sin(90°)

F = 1.9 × 10^-25 N

Therefore, the magnitude of the magnetic force on the electron is 1.9 × 10^-25 N, which corresponds to option (b).

*IG:whis.sama_ent

The charge flowing through the film in 15 min is To find the charge that flows through the gold film in an integrated circuit with a current density of 8.0×10^5 A/m^2 in 15 minutes is 1.50 × 10^-1 Coulombs.

Determine the cross-sectional area of the gold film:
Area = thickness × width = (2.7 × 10^-6 m) × (77 × 10^-6 m) = 2.079 × 10^-10 m^2
Calculate the total current flowing through the film:
Current (I) = current density × area = (8.0 × 10^5 A/m^2) × (2.079 × 10^-10 m^2) = 1.6632 × 10^-4 A
Convert the time given (15 minutes) to seconds:
Time (t) = 15 min × 60 s/min = 900 s
Calculate the charge (Q) that flows through the film using the formula Q = I × t:
Charge (Q) = (1.6632 × 10^-4 A) × (900 s) = 1.49688 × 10^-1 C
So, the charge that flows through the gold film in an integrated circuit with a current density of 8.0×10^5 A/m^2 in 15 minutes is approximately 1.50 × 10^-1 Coulombs.

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PartA Using the mirror and magnification equations, the location of the image produced by the mirror is 0.354 m behind the mirror.

Part B Using the mirror and magnification equations, the magnification of the image produced by the mirror is 0.197.

Part A:
To find the location of the image produced by the concave mirror, we can use the mirror equation:

1/f = 1/o + 1/i

where f is the focal length, o is the object distance, and i is the image distance.

Plugging in the given values, we get:

1/0.69 = 1/1.8 + 1/i

Solving for i, we get:

i = -0.354 m

The negative sign indicates that the image is virtual and located behind the mirror.

Therefore, the location of the image produced by the mirror is 0.354 m behind the mirror.

Part B:
To find the magnification of the image produced by the mirror, we can use the magnification equation:

m = -i/o

where m is the magnification, i is the image distance, and o is the object distance.

Plugging in the given values, we get:

m = -(-0.354)/1.8

Simplifying, we get:

m = 0.197

Therefore, the magnification of the image produced by the mirror is 0.197.

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These formulas provide a way to calculate the mean and variability of Y, which are important measures for understanding the behavior of random variables.

a) The probability mass function for [tex]X_{33}[/tex] is given by [tex]PX_{33}[/tex](x) = (100 choose x) * [tex]p^x[/tex] *[tex](1-p)^(100-x).[/tex]

b) No, X1 and X2 are not independent because the outcome of the first coin flip can affect the outcome of the second coin flip.

c) The distribution of Y is a binomial distribution with parameters n = 1000 and p. Therefore, the probability mass function for Y is given by PY(y) = (1000 choose y) * [tex]p^y[/tex] * [tex](1-p)^(1000-y).[/tex]

d) The expected value of Y is E[Y] = np = 1000p, and the variance of Y is Var[Y] = np(1-p) = 1000p(1-p).

Variability refers to the degree to which data or observations fluctuate or vary from the mean or expected value. It is a statistical concept that measures the dispersion of data points in a dataset. A dataset with high variability indicates that the data points are widely spread out, while a low variability indicates that the data points are clustered around the mean.

There are different measures of variability, including range, variance, and standard deviation. Range is the difference between the maximum and minimum values in a dataset, while variance and standard deviation measure the average squared deviation from the mean. These measures are important in many fields, such as finance, economics, and psychology, as they help to understand the spread of data and assess the reliability of statistical estimates.

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In a plane mirror, the image distance is equal to the object distance, the magnification is 1, the image is virtual, and it is upright.

For concave mirrors, the image distance and magnification depend on the location of the object relative to the focal point of the mirror. If the object is placed on the far side of the focal point, the image will be real, upside-down and decreased. If the object is placed between the focal point and the mirror, the image will be virtual, upright and amplified. If the object is placed at the focal point, there will be no image.

For convex mirrors, the image distance and magnification are always negative, indicating that the image is virtual, upright and diminished, regardless of the location of the object.

For a plane mirror for an object distance of 10.0 cm, the image distance is also 10.0 cm, and the magnification is 1. For an object distance of 5.00 cm, the image distance is also 5.00 cm, and the magnification is 1. The images in both cases are virtual and upright.

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The capacitance of a p-n junction depends on the doping concentration and the bias voltage. Doubling the doping concentration of the n-side will decrease the depletion width and increase the capacitance. However, increasing the reverse bias voltage will increase the depletion width and decrease the capacitance.

Using the formula for the capacitance of a p-n junction, C = εA / d, where ε is the permittivity of the semiconductor, A is the area of the junction, and d is the depletion width, we can calculate the new capacitance.

Assuming that the area of the junction and the permittivity of the semiconductor remain constant, doubling the doping concentration of the n-side will halve the depletion width. Therefore, the new depletion width will be d/2.

When the reverse bias is increased to 80 V, the depletion width will increase by a factor of 8. Therefore, the new depletion width will be 8d.

Using the formula for the capacitance, we get:

C' = εA / (8d/2)
  = 4εA / d

Therefore, the new capacitance will be 4 times the original capacitance:

C' = 4 x 10 pf
  = 40 pf

Therefore, if the doping of the n side is doubled and the reverse bias is changed to 80 V, the capacitance of the p-n junction will be 40 pf.

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In the film American Beauty, capitalism and patriarchy negatively impact the characters, especially the main character, Lester Burnham. Similarly, today's media perpetuates harmful gender stereotypes and sends negative messages to young people about their roles and expectations in society.

The film American Beauty explores the negative impact of capitalism and patriarchy on its characters, especially the main character Lester Burnham. Lester, who is stuck in his corporate job and loveless marriage, tries to reject the values of capitalism and patriarchy, but his attempts lead to his downfall. The film depicts how these systems can restrict individuals and lead to feelings of entrapment, dissatisfaction, and despair.

Today's media continues to project images that reinforce gender inequality and promote harmful stereotypes. Women are often portrayed as sexual objects for male consumption, while men are portrayed as dominant and aggressive. These images send harmful messages to young people about their roles and expectations in society. Young people may internalize these messages and believe that certain behaviors or attitudes are acceptable or expected based on their gender. This perpetuates gender inequality and reinforces harmful gender norms and stereotypes. Media creators should consider the impact of their images on young people and work towards promoting positive and diverse representations of gender in media.

Therefore, Capitalism and patriarchy have a bad effect on the characters in the movie American Beauty, particularly the lead character Lester Burnham. Similarly to this, the media of today reinforces damaging gender stereotypes and conveys to young people unfavorable messages about their social duties and expectations.

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If we see a massive main-sequence star that is above 10 solar masses, we can conclude that it is relatively young compared to most stars.

Massive stars have a shorter lifespan than lower-mass stars. They burn through their fuel at a much faster rate, resulting in a shorter main-sequence lifetime. As a result, the more massive the star, the shorter its lifespan. Therefore, a massive main-sequence star above 10 solar masses must be relatively young compared to most stars because it has not had enough time to exhaust its fuel and evolve off the main sequence.

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W = kd⁵/5 calculates the effort required to drive a sharp item d distances into a material.

Hence, the work done by the cable is equal to the displacement times the force of friction + mg. Hence, we have 5.92 times ten to the five joules of work done by the cable, which is equal to 100 newtons of friction plus 1500 kilogrammes, the mass of the lift, times 9.8 newtons per kilogramme, and all of that multiplied by four g metres.

W = ∫→F · d→x

where →F is the force, d→x is the displacement, and the integral is taken from x = 0 to x = d. For the given force →F = kx⁴, we can express this as:

W = ∫0d kx⁴ dx

Integrating this expression gives:

W = [kx⁵/5]0d

Substituting d for x, we get:

W = kd⁵/5

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The speed of a simple harmonic oscillator is given by the equation v = ±Aω√(1-(x/A)^2), where A is the amplitude, ω is the angular frequency, and x is the displacement from the equilibrium position. To find the positions where the speed is half its maximum, we set v = ±(1/2)Aω and solve for x.

±(1/2)Aω = ±Aω√(1-(x/A)^2)

Squaring both sides, we get:

(1/4)A^2ω^2 = A^2ω^2(1-(x/A)^2)

Simplifying, we get:

1/4 = 1-(x/A)^2

(x/A)^2 = 3/4

x = ±(√3/2)A

Therefore, the positions where the speed of a simple harmonic oscillator is half its maximum are x = ±(√3/2)A.

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The smaller the Ka value, the weaker the acid and the less it ionizes in solution.

The extent of ionization of a weak acid is quantified by the acid ionization constant (Ka). This means that the equilibrium between the acid and its conjugate base lies further to the left, with more undissociated acid present in solution.

Conversely, a larger Ka value indicates a stronger acid with greater ionization in solution, and a larger proportion of the acid molecules will have dissociated into ions.

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Answer: 0.776 atm

Explanation:

5.90×10² mmHg ÷ 760 mmHg/atm ≈ 0.776 atm

Answer:

peanuts

Beans

Clover

Explanation:

Spinach, carrots, and potatoes are not legumes but rather vegetables.

Also I’m in Culinary 1. Attached pic of from my class.

The given flow is turbulent and the maximum velocity of laminar flow is 0.64 m/s

1. To determine if the flow is laminar or turbulent, we can use the Reynolds number formula:

Re = (ρVD)/μ

Where:
ρ = density of fluid
V = velocity of fluid
D = diameter of pipe
μ = dynamic viscosity of fluid

Plugging in the values given, we get:

Re = (1000 kg/m3)(5.5 m/s)(0.15 m)/(0.001 kg/m.s) = 90750

If the Reynolds number is less than 2300, the flow is laminar. If it is greater than 4000, the flow is turbulent. If it is between 2300 and 4000, the flow may be laminar or turbulent depending on other factors.

In this case, the Reynolds number is greater than 4000, so the flow is turbulent.

2. To maintain laminar flow, the Reynolds number should be less than 2300. We can rearrange the Reynolds number formula to solve for the maximum velocity:

Vmax = (Reμ)/(ρD)

Plugging in the values given, we get:

Vmax = (2300)(0.05 Pa.s)/(900 kg/m3)(0.2 m) = 0.64 m/s

Therefore, the maximum velocity to maintain laminar flow in this pipe is 0.64 m/s.

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The reason why the minimum T2 occurs when T2 and T1 are perpendicular to each other in the boat problem is that the force T2 acts as a component of the net force acting on the boat, and when it is perpendicular to T1, it is the smallest possible value that can counteract the force of the current.

On the other hand, in the tank problem, the minimum P occurs when P and R are perpendicular to each other because P is acting as a support force against the weight of the tank, and when it is perpendicular to R (the normal force of the floor), it is the smallest possible value that can support the weight of the tank.
To determine whether to find minimum or maximum values for the forces in these types of problems, you should look for the point where the system is in equilibrium, where the net force and net torque acting on the system are both zero. In the boat problem, you would be looking for the minimum T2 that can balance the force of the current, while in the tank problem, you would be looking for the minimum P that can support the weight of the tank.

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The quantity that has units of kg·m²/s is angular momentum. (D)

Angular momentum is a measure of the amount of rotation an object has around an axis. It is the product of the moment of inertia and angular velocity of the object.

The moment of inertia depends on the distribution of mass of an object and the axis of rotation, while the angular velocity describes how quickly the object is rotating around the axis. The product of these two quantities gives the angular momentum of the object.

In physics, units of measurements are used to represent different types of quantities. The units of kg·m²/s represent a combination of mass, distance, and time.

This combination is characteristic of angular momentum, which is a rotational analog of linear momentum and is distinct from work and power, which have different units of measurement.(D)

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a. The energy consumed over the one-year period is 438 kWh.

b. The utility energy charges for this period at a rate of $0.12/kWh is $52.56.

a. To determine the energy consumed over the one-year period, we first need to calculate the energy consumption per day.

The compact fluorescent lamp has a power rating of 23 W, which is equivalent to a 100 W incandescent lamp. Therefore, we can assume that it consumes the same amount of energy as a 100 W incandescent lamp.

Energy consumption per day = Power x Time
= 100 W x 12 hours
= 1200 Wh

Now, we need to convert this to kilowatt-hours (kWh) as that is the unit of measurement used in utility energy charges.

Energy consumption per day = 1200 Wh ÷ 1000
= 1.2 kWh

Energy consumption over one year = Energy consumption per day x 365 days
= 1.2 kWh/day x 365 days
= 438 kWh

Therefore, the energy consumed over the one-year period is 438 kWh.

b. To calculate the utility energy charges for this period at a rate of $0.12/kWh, we simply need to multiply the energy consumed by the rate.

Utility energy charges = Energy consumed x Rate
= 438 kWh x $0.12/kWh
= $52.56

Therefore, the utility energy charges for this period at a rate of $0.12/kWh is $52.56.

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Answer:

The statement that "electromagnetic waves require a medium to travel through" is incorrect. Electromagnetic waves do not require a medium to travel through and can propagate through a vacuum. This was one of the key insights of James Clerk Maxwell's theory of electromagnetism.

The x-component of the electric field is Ex = Ay - 2Bx.

To find the x-component of the electric field, we need to take the negative gradient of the electric potential, which gives us the electric field vector E = -∇V. Since V(x,y,z) = Axy - Bx^2 + Cy, we have:

∂V/∂x = Ay - 2Bx

∂V/∂y = Ax + C

∂V/∂z = 0

Thus, the electric field vector is E = -(Ay - 2Bx)i - (Ax + C)j, where i and j are the unit vectors in the x and y directions, respectively. The x-component of the electric field is obtained by taking the dot product of E with the unit vector i, giving us:

Ex = E · i = -(Ay - 2Bx)i · i - (Ax + C)j · i

= -(Ay - 2Bx)(i · i) - (Ax + C)(j · i)

= -(Ay - 2Bx) - Ax

= Ay - 2Bx

Therefore, the x-component of the electric field is Ex = Ay - 2Bx.

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Therefore, the electron drift speed in the wire is 0.138 um/s.

The electron drift speed in the wire can be calculated using the formula:

electron drift speed = current / (number of electrons x cross-sectional area x charge of an electron)

First, we need to find the current, which can be calculated using the formula:

current = number of electrons / time

Plugging in the given values, we get:

current = 2.00 × 10^20 / 4.50 = 4.44 × 10^19 electrons/s

Next, we need to find the cross-sectional area of the wire, which is given as a diameter. The radius of the wire is half the diameter, so:

radius = 3.60 / 2 = 1.80 mm = 0.00180 m

cross-sectional area = π x (radius)^2 = π x (0.00180)^2 = 1.02 x 10^-5 m^2

Now we can plug in all the values to find the electron drift speed:

electron drift speed = 4.44 × 10^19 / (2.00 × 10^20 x 1.02 x 10^-5 x 1.60 × 10^-19)

electron drift speed = 0.138 um/s

Therefore, the electron drift speed in the wire is 0.138 um/s.

To explain, the electron drift speed is the average speed at which electrons move through a conductor in a current. In this case, we used the given number of electrons and the cross-sectional area of the wire to calculate the current, and then used that along with the charge of an electron to find the electron drift speed.

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The characteristic time constant of a 24.3 mH inductor with a resistance of 3.95 Ω is 6.15 ms.

To find the characteristic time constant of a 24.3 mH inductor with a resistance of 3.95 Ω, we can use the formula:

Time constant (τ) = Inductance (L) / Resistance (R)

In this case, the inductance (L) is 24.3 mH and the resistance (R) is 3.95 Ω. Plugging these values into the formula, we get:

τ = (24.3 x 10⁻³ H) / (3.95 Ω)

≈ 6.15 x 10⁻³ s

So, the characteristic time constant of the 24.3 mH inductor with a resistance of 3.95 Ω is approximately 6.15 ms.

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(a)The value of resistance Rs = 10.518 Ω

(b) The percentage decrease (I0-I)/I0 (%) = 0.1714%

(c) Percentage change in voltage ΔV/V0 (%) = 0.1714%


(a) Since the ammeter (0.018 Ω) and resistor (10.5 Ω) are in series, their resistances add up: Rs = 0.018 Ω + 10.5 Ω = 10.518 Ω.

(b) Let V be the voltage across the combination. The original current I0 = V / 10.5 Ω, and the new current I = V / 10.518 Ω. The percent decrease in current = [(I0 - I) / I0] * 100 = [(V / 10.5 Ω - V / 10.518 Ω) / (V / 10.5 Ω)] * 100 = 0.1714%.

(c) Since the current is kept the same, the voltage across the combination V' = I * 10.518 Ω, and the percent increase in voltage = [(V' - V) / V] * 100 = [(I * 10.518 Ω - I * 10.5 Ω) / (I * 10.5 Ω)] * 100 = 0.1714%.

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The velocity of the body at this instant is 65 m/s.

Velocity is a physical quantity that describes the rate at which an object changes its position in a particular direction. It is a vector quantity, which means it has both magnitude and direction. The magnitude of velocity is known as speed and is measured in meters per second (m/s) or other units of distance per unit of time, while the direction of velocity is given by its sign or by specifying its direction in relation to a reference point or axis. Velocity is an important concept in physics, particularly in the study of motion and mechanics.

To find the velocity of the body after 10 seconds, we can use the formula:

v = u + at

where:

v = final velocity

u = initial velocity

a = acceleration

t = time

Plugging in the given values, we get:

v = 5 m/s + (6 m/s^2)(10 s) = 65 m/s

Therefore, At this point, the body's velocity is 65 m/s.

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The distance travelled by automobile while braking is around 7600 m, the angular speed of the tyres about their axles is 27.8 rad/s, and the magnitude of the angular acceleration of the wheels is 0.0605 rad/s2.

The formula for angular speed may be used to calculate the angular speed of the tyres after first changing the velocity from km/h to m/s:

[tex]v = 50.0 km/h = 13.9 m/sr = 0.500 m (radius of the tire)ω = v/r = 13.9 m/s / 0.500 m = 27.8 rad/s[/tex]

b)The following formula can be used to determine the tyre's initial angular speed:

ω^2 = ω0^2 + 2αθ

0 = ω0^2 + 2α(70π)

α = -ω0^2 / (2θ)

α = [tex]- (27.8 rad/s)^2 / (2 × 70π) = -0.0605 rad/s^2[/tex]

c)The following formula may be used to determine how far the automobile travelled when braking:

θ = ω0t + (1/2)αt^2

v = at

[tex]t = v/a = 13.9 m/s / 0.0605 rad/s^2 = 229 s[/tex]

[tex]70π = (27.8 rad/s)(229 s) + (1/2)(-0.0605 rad/s^2)(229 s)^2[/tex]

Simplifying:

70π = 6354 rad + 1255 m=7600 m

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