a 0.50-kg box is attached to an ideal spring of force constant (spring constant) 20 n/m on a horizontal, frictionless floor. the box oscillates in simple harmonic motion and has a speed of 1.5 m/s at the equilibrium position. what is the amplitude of vibration? group of answer choices 0.5 m 20 m 0.24 m 1.5 m

The statement " An optical disc drive spins at a constant speed—this is called constant linear velocity (CLV)" is true because an optical disc drive operates using a technique called Constant Linear Velocity (CLV).

CLV is a mechanism by which the speed at which the disc spins varies depending on where the data is being read or written on the disc. This ensures that the rate at which data is transferred remains consistent throughout the entire process.

The reason behind using CLV is to maintain an optimal data transfer rate and minimize errors during reading or writing. As the data density on an optical disc varies from the inner to the outer edge, the rotational speed of the disc is adjusted accordingly. This means that when the drive reads or writes data from the inner part of the disc, it spins faster, and when it reads or writes data from the outer part, it spins slower.

By employing CLV, optical disc drives can efficiently read or write data with fewer errors and higher precision. This technology is widely used in CD, DVD, and Blu-ray drives, ensuring smooth and reliable data access in a wide range of applications, from personal computers to multimedia systems. Overall, CLV plays a crucial role in the performance and accuracy of optical disc drives.

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At equilibrium on a bathroom weighing scale, the downward pull of gravity on you is balanced by the upward force called the normal force.

When you stand on a weighing scale, your weight (downward force due to gravity) pushes down on the scale. The scale, in response, exerts an equal and opposite force, known as the normal force, which acts upward to balance the gravitational force.

This is in accordance with Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction. At equilibrium, these forces are equal, and the scale measures your weight based on this normal force.

Bathroom scales for home use show your weight on a dial or a digital screen. These scales weigh you in one of two ways: mechanically, with springs, or electronically, with circuits that bend under weight, changing the current flowing through them.

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The electrical device that you should implement to convert the DC power stored in the batteries into AC power that can be used in the data center is an inverter.
To convert the DC power stored in the batteries into AC power that can be used in the data center, you should implement an inverter. This electrical device is specifically designed to change DC power to AC power, making it suitable for powering your servers, switches, and routers that require AC to operate.

Direct current (DC) occurs when the current flows in one constant direction. It usually comes from batteries, solar cells, or from AC/DC converters. DC is the preferred type of power for electronic devices. Alternating current (AC) occurs when the electric current periodically inverts its direction.

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According to Kepler's Second Law, as a planet orbits the Sun, an imaginary line connecting them sweeps across the same amount of area at the same rate.

Mercury's orbit is shaped like an egg, and the Mercury, orbits the Sun within Earth's orbit as an inferior planet; from Earth, Mercury's apparent distance from the Sun never exceeds 28°.

Due to its close proximity to the Sun, the planet may only be seen around the horizons of the western and eastern hemispheres, typically in the twilight hours.

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The average velocity of the object over the interval from t can be found using the formula v_avg = (s(t2) - s(t1)) / (t2 - t1), where s(t) is the position function, and t1 and t2 are the time intervals.

To find the average velocity of the object that has fallen from a height of 397 meters after t seconds, we need to determine the position function s(t) first. Assuming free fall under constant acceleration due to gravity, the position function is s(t) = 397 - (1/2)gt², where g ≈ 9.81 m/s².

Next, choose t1 and t2 as the time interval for which the average velocity is to be calculated. Calculate s(t1) and s(t2) using the position function, and then use the formula v_avg = (s(t2) - s(t1)) / (t2 - t1) to find the average velocity.

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a) The probability that a randomly selected metal sheet of this type has a Young's modulus less than 80 gpa is approximately 0.0116.

b) The probability that a randomly selected metal sheet of this type has a Young's modulus between 80 gpa and 90 gpa is approximately 0.9768.

c)  The minimum Young's modulus of the top 5% of metal sheets of this type is approximately 88.61 gpa.

a) What is the probability that a randomly selected metal sheet of this type has a Young's modulus less than 80 gpa?

To solve this, we need to standardize the value of 80 gpa using the formula z = (x - μ) / σ, where x is the value we're interested in, μ is the mean, and σ is the standard deviation.

z = (80 - 85) / 2.2 = -2.27

Using a standard normal distribution table or calculator, we can find that the probability of a standard normal random variable being less than -2.27 is approximately 0.0116.

Therefore, the probability that a randomly selected metal sheet of this type has a Young's modulus less than 80 gpa is approximately 0.0116.

b) What is the probability that a randomly selected metal sheet of this type has a Young's modulus between 80 gpa and 90 gpa?

To solve this, we need to standardize the values of 80 gpa and 90 gpa using the same formula as above:

z1 = (80 - 85) / 2.2 = -2.27

z2 = (90 - 85) / 2.2 = 2.27

Using a standard normal distribution table or calculator, we can find the probabilities of a standard normal random variable being less than -2.27 and 2.27, respectively.

P(z < -2.27) = 0.0116

P(z < 2.27) = 0.9884

Therefore, the probability that a randomly selected metal sheet of this type has a Young's modulus between 80 gpa and 90 gpa is approximately 0.9884 - 0.0116 = 0.9768.

c) What is the minimum Young's modulus of the top 5% of metal sheets of this type?

We need to find the z-value that corresponds to the top 5% of a standard normal distribution, which is approximately 1.645.

Using the formula for standardizing a value with the z-score, we can solve for the minimum value of Young's modulus corresponding to this z-value:

1.645 = (x - 85) / 2.2

x - 85 = 1.645 * 2.2

x = 88.61

Therefore, the minimum Young's modulus of the top 5% of metal sheets of this type is approximately 88.61 gpa.

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the length of the steel rod will increase by 0.0139 m, and the final length will be 2.0139 m.

We can use the formula for the change in length of a material under tension:

ΔL = (F * L) / (A * E)

where ΔL is the change in length, F is the force applied, L is the original length, A is the cross-sectional area, and E is the Young's modulus of the material.

First, we need to convert the diameter to meters and calculate the cross-sectional area:

r = 0.5 * (1 cm) = 0.005 m

A = [tex]π * r^2 = π * (0.005 m)^2 = 7.85 x 10^-5 m^2[/tex]

Next, we can calculate the force applied:

F = m * g = (103 kg) * (9.81 [tex]m/s^2[/tex]) = 1010.43 N

Now we can plug in all the values and solve for ΔL:

ΔL = (F * L) / (A * E)

ΔL = (1010.43 N * 2.00000 m) / (7.85 x [tex]10^-5 m^2 * 342 x 10^6 N/m^2[/tex])

ΔL = 0.0139 m

Therefore, the length of the steel rod will increase by 0.0139 m, and the final length will be:

L = 2.00000 m + 0.0139 m = 2.0139 m.

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Explanation:

Period = 2 pi sqrt (l/g)

   2       = 2 pi sqrt (l/9.81 )

   .994 m   = ~  1 meter long

Answer:

D  1.6 m

Explanation:

Maximum range is obtained by firing at 45 degree angle

Vertical velocity is then   4 sin 45 = 2.83 m/s

 gravity cause the velocity to be expressed as

       v= 2.83 m/s - 9.81 t          when it reaches its highest point...v = 0

        0 = 2.83 - 9.81 t       which shows t = .288 seconds

            then it takes this same amount of time to fall back to the ground

               for a total flight time of   2 * .288 = .577 seconds

For this .577 seconds it is traveling horizontally at the horizontal component    4 m/s  cos 45 = 2.83 m/s

          in .577 seconds it will travel downrange:

                        2.83 m/s   * .577 s = 1.63 meters  downrange

Answer:

k

Explanation:

Summer means lots of out-of-doors time. Whether at beaches, barbeques, hanging out in the park or at the pool, most people catch more sun rays

this season than other times of the year. In the process, some will get a suntan while others, unfortunately, will experience the painful redness, peeling and blistering that can occur with a bad sunburn.

The centripetal force acting on the 1.5 kg mass moving in a circular path with a centripetal acceleration of 18 m/s² is 27 N.

To find the centripetal force (F_c), we can use the following formula:

F_c = m * a_c

where F_c is the centripetal force, m is the mass (1.5 kg), and a_c is the centripetal acceleration (18 m/s²).

Step 1: Plug the values into the formula:

F_c = (1.5 kg) * (18 m/s²)

Step 2: Multiply the mass and centripetal acceleration:

F_c = 27 N

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The back of the seat exerts a greater force on Jonathan when he accelerates away from the stop sign.

This is because force is directly related to mass, and Jonathan's mass is likely greater than that of his eight-year-old daughter.

According to Newton's second law of motion, force (F) equals mass (m) times acceleration (a), or F = ma.

Since Jonathan's mass is greater, the force exerted on him by the back of the seat will also be greater.

Thus, the back of the seat exerts a greater force on Jonathan when he accelerates away from the stop sign.

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The answer is A. Earth. This is because the value of gold is determined by its weight and mass, which is the same on Earth and in the extraterrestrial market.

Therefore, the ingot that weighs 10 lb on Earth will have the most gold, regardless of its weight on other planets.To get the most gold, you should choose the ingot that weighs 10 lb on Jupiter because the gravity on Jupiter is much stronger than on Earth and the Moon. The ingot's mass will be greater if it weighs 10 lb under Jupiter's gravity, resulting in more gold for you.

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The two sets of data that the student should use together to determine the final angular velocity of the pulley just before the block hits the floor are the time it takes for the block to fall to the floor and the radius of the pulley.

1. The time it takes for the block to fall to the floor: This is important because it will give the student the total time the pulley had to rotate before the block hit the floor. This can be used to calculate the angular acceleration of the pulley.

2. The radius of the pulley: This is important because it will give the student the distance that the edge of the pulley moved during the rotation. This can be used to calculate the final angular velocity of the pulley using the formula: final angular velocity = initial angular velocity + angular acceleration × time.

The time it takes for the block to fall to the floor and the radius of the pulley are both important pieces of information that can be used to calculate the final angular velocity of the pulley. The time gives us the total time the pulley had to rotate, while the radius gives us the distance the edge of the pulley moved during the rotation. Using these two pieces of information, we can calculate the angular acceleration of the pulley and then use that to calculate the final angular velocity.

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Calculate the magnitude of the net force using the Pythagorean theorem. The magnitude of the net force equals the square root of the sum of the squares of the x and y components of the net force.

To determine the magnitude of the net force on the first wire in Figure 1, please follow these steps:

Unfortunately, without more information about Figure 1 and the forces involved, I cannot provide a numerical answer. Please provide the necessary details to proceed with the calculation.

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The speed of sound is approximately 153.6 m/s. The tuning fork produces resonance with a closed pipe, the wavelength of the sound wave produced will be twice the length of the pipe.

The formula v = fλ, where v is the speed of sound, f is the frequency of the tuning fork, and λ is the wavelength of the sound wave produced.
First, we need to find the wavelength of the sound wave.

Since the tuning fork produces resonance with a closed pipe, the wavelength of the sound wave produced will be twice the length of the pipe. Therefore, λ = 2(20.0 cm) = 40.0 cm = 0.4 m.
Next, we can plug in the values we have into the formula v = fλ:
v = (384 Hz)(0.4 m)
v = 153.6 m/s

Hence, the speed of sound is approximately 153.6 m/s.

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This value will be a decimal number like 18.65 W.

This reaction value implies that the energy balance for the entire domain is satisfied exactly, as discussed under Big Ideas: Finite Element Analysis > Finite Element Solution > Reaction.

To check the energy balance in ANSYS and find the reaction at the left boundary, follow these steps:
Open the ANSYS solution for your problem.
Add a Reaction Probe by selecting "Insert" in the menu, then choose "Probe" and select "Reaction".
In the Details view, set the location to the left boundary of your domain.
Set the thickness to 1m (this converts heat flux to heat flow, as discussed in the 2D Conduction module).
Click on "Update" or "Evaluate All Results" to calculate the reaction at the left boundary.
Now, you should see the reaction value in the Results section, expressed in Watts (W).

This value will be a decimal number like 18.65.

This reaction value implies that the energy balance for the entire domain is satisfied exactly, as discussed under Big Ideas: Finite Element Analysis > Finite Element Solution > Reaction.

However, keep in mind that this does not imply that energy balance is satisfied for each individual element.

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we need to use the concept of density. Density is defined as the mass per unit volume of a substance. Since we know the weights of the cylinder when it is half full and one third full with water, we can calculate the mass of the water in each case and use the difference in mass to find the mass of the empty cylinder.

Let's start with the half-full cylinder. We know that the mass of the cylinder and the water together is 13.7 kg. Let's assume that the mass of the empty cylinder is x kg. Then, the mass of the water in the cylinder is:

13.7 kg - x kg = 0.5Vρ, where V is the volume of the cylinder, and ρ is the density of water.

Similarly, for the one-third full cylinder, we have:

10 kg - x kg = 0.33Vρ

Dividing the two equations, we get:

(13.7 - x) / 0.5 = (10 - x) / 0.33

Simplifying and solving for x, we get:

x = 2.57 kg

Therefore, the empty cylinder weighs 2.57 kg.

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If the magnet moves towards or away from the metal loop, or if the metal loop moves towards or away from the magnet, an induced current will be produced in the loop.

The motion of a magnet and/or metal loop with constant velocity ū can induce an electrical current in the loop. This is known as Faraday's Law of Induction.

The magnitude of the induced current is proportional to the rate of change of magnetic flux through the loop.

The direction of the induced current is determined by Lenz's Law, which states that the direction of the induced current creates a magnetic field that opposes the change in magnetic flux that caused it.

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To solve this problem, we can use the equations of motion for the two cars. The equations of motion for a body under constant acceleration are:

v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time taken.

s = ut + 1/2 at², where s is the distance traveled.

Let's assume that the train comes to a stop after a time of t seconds. During this time, the speed of the train decreases from 90 km/h to 0 km/h. We need to convert the speed to m/s, so we can use the standard units for the equations of motion.

a) First, let's calculate the acceleration of the train. We have the braking force, F = 30 kN, and the mass of each car, m_A = 25 Mg and m_B = 20 Mg. We can calculate the total mass of the train:

m = m_A + m_B = 25 Mg + 20 Mg = 45 Mg

Now, we can calculate the acceleration:

a = F/m = 30 kN / 45 Mg = 0.6667 m/s²

Next, we can convert the initial speed of the train to m/s:u = 90 km/h = 25 m/s

Using the equation of motion, we can calculate the time taken for the train to come to a stop:

0 = 25 - 0.6667t

t = 37.5 s

Now we can use the equation of motion to calculate the distance traveled by the train:

s = ut + 1/2 at²

s = 25 x 37.5 + 1/2 x 0.6667 x (37.5)²

s = 468.75 + 703.125

s = 1171.875 m

Therefore, the distance traveled by the train before it comes to a stop is 1171.875 meters.

b) To calculate the coupling force between the cars as the train is slowing down, we can use Newton's third law of motion, which states that every action has an equal and opposite reaction. When the brakes are applied, there is a force acting on each car in the opposite direction to the direction of motion. According to the third law, there must be an equal and opposite force acting on each car in the direction of motion. The coupling force between the cars is the force acting on car A due to car B, or vice versa.

Let's calculate the deceleration of car A. The force acting on car A is:

F_A = ma = 25 Mg x 0.6667 m/s² = 16.667 kN

The deceleration of car A is:

a_A = F_A / m_A = 16.667 kN / 25 Mg = 0.6667 m/s²

Using the equation of motion, we can calculate the speed of car A when the train comes to a stop:

0 = v_A - 0.6667 x 37.5

v_A = 25 m/s

The force acting on car A due to car B is:

F_AB = m_A x a_A = 25 Mg x 0.6667 m/s² = 16.667 kN

Therefore, the coupling force between the cars as the train is slowing down is 16.667 kN.

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The semimajor axis of this planet's orbit is 5 * 10^{6} km

First, let's convert the orbital period of Kepler-62e from days to hours:
122 days * (24 hours/day) = 2928 hours
Now we can use Newton's version of Kepler's 3rd law to calculate the semi-major axis (a):
P^2 = (\frac{4π^2}{MG}) * a^3
Rearrange the formula to solve for a:
a^3 =\frac{ (P^2 * MG) }{ (4π^2)}
Now, plug in the given values:
M = 1.4 * 10^{30} kg (mass of the star)
G = 8.642 * 10^{-13 }km³/(kg hr²) (universal gravitational constant)
P = 2928 hours (orbital period in hours)
a^3 =\frac{ (2928^{2} * 1.4 * 10^{30} * 8.642 *10^{-13}) }{(4π^2)}
a^3 = 1.1249 * 10^{17} km³
Now, take the cube root to find the semi-major axis (a):
a = (1.1249 * 10^{17})^{(1/3)}
a ≈ 4.82 * 10^{5 }km
The closest answer choice to this calculated value is:B) 5 * 10^{6} km

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complete question:

Newton's version of Kepler's 3rd law is:

^2=(4^2/)^3

M is the sum of the masses of the two objects involved, P is the orbital period in hours, G is the universal gravitational constant, equal to 8.642 x 10-13 km3/(kg hr2), and a is the semi-major axis of the orbit in kilometres.

Kepler-62e is a planet similar in size to the Earth with an orbital period of 122 days. The star it orbits has a mass of 1.4 x 1030 kg. Convert the period to hours and use Newton's version of Kepler's 3rd law to calculate the semimajor axis of this planet's orbit. Your answer will not match any of these choices, instead choose the answer that is closest to your calculated value.

A) 5x10^3km

B) 5x10^6km

C) 5x10^7km

D) 5x10^8km

E) 5x10^11km

The magnitude of the force per unit length acting on a long wire carrying a current in a uniform magnetic field can be found using the formula F/L = B*I*sin(theta), where F is the force, L is the length of the wire, B is the magnetic field, I is the current, and theta is the angle between the magnetic field and the current.

In this case, the current (I) is 6.9 A in the positive x direction and the magnetic field ,

(B) is 1.3 T in the y direction.

Since the current and magnetic field are perpendicular to each other, the angle (theta) between them is 90 degrees. Therefore, sin(90) = 1.

Hence, The magnitude of the force per unit length acting on the wire is F/L = (1.3 T) * (6.9 A) * sin(90) = 8.97 N/m.

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The oldest stars have low metal content while newer, younger stars have higher metal content. This is because metals are created through nuclear fusion processes that occur within stars over time.

As the universe has aged and more stars have formed and gone through their lifecycles, the abundance of metals has increased. Therefore, newer stars that formed from enriched interstellar material have a higher metal content than the older, first-generation stars that formed from pristine gas.

What's a star?

Stars originate from balls of luminous gas in which most of the star-forming elements are hydrogen and helium, held together by their own gravity. The temperature is so high at its core that nuclear fusion occurs, producing energy.

Class K stars have very weak Balmer streaks. The streaks of neutral metals appear stronger than those of class G stars. The stripes of Titanium Oxide (TiO) molecules begin to appear. Class K stars are about 13% of the entire population of main sequence stars.

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Harlow Shapley surmised that the size and extent of our "star system," or the Milky Way Galaxy, could be determined by observing the distribution of globular clusters and measuring their distances using Cepheid variable stars.

Here's a step-by-step explanation of his approach:

1. Shapley studied the positions of globular clusters, which are dense groups of thousands to millions of stars found in a galaxy.
2. He used Cepheid variable stars within these clusters to measure their distances. Cepheid variables have a known relationship between their luminosity and pulsation period, making them excellent distance indicators.
3. By analyzing the distribution of these globular clusters and their distances, Shapley was able to determine the overall size and extent of our Milky Way Galaxy.

In summary, Harlow Shapley used the distribution of globular clusters and the distances measured using Cepheid variable stars to determine the size and extent of our star system, the Milky Way Galaxy.

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A helium nucleus has less mass than four protons because during the fusion process, some mass is converted into energy, following Einstein's famous equation, E=mc². This energy release, known as binding energy, is responsible for holding the helium nucleus together.

So, when four hydrogen nuclei (protons) fuse to form a helium nucleus, a small amount of mass is lost and converted into binding energy, resulting in a helium nucleus with slightly less mass than the initial four protons.

The fusion of four hydrogen nuclei to form a helium nucleus releases a tremendous amount of energy, which is carried away by particles such as photons and neutrinos. This energy is converted into mass according to Einstein's famous equation E=mc^2. Therefore, the mass of the helium nucleus is actually slightly less than the combined mass of its four constituent protons because some of the mass has been converted into energy during the fusion process. This is known as mass defect, and it is a fundamental principle of nuclear physics.

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The statement about a resistor, a capacitor, and an inductor, when connected in series across an AC source that is false, is e.

When a resistor, capacitor, and inductor are connected in series across an AC source, the following statements are true:

a. The instantaneous voltage across the capacitor lags the current by 90° because the capacitor impedes current flow and charges and discharges with a time delay.

b. The instantaneous voltage across the inductor leads the current by 90° because the inductor impedes changes in current flow and generates a magnetic field that stores energy.

c. The instantaneous voltage across the resistor is in phase with the current because there is no phase shift caused by the resistance.

d. The voltages across the resistor, capacitor, and inductor are not in phase because they have different phase relationships with the current.

However, the RMS voltage across the combination of the three elements does not equal the algebraic sum of the RMS voltages across each element separately because the voltages across the elements are not in phase with each other.

The total RMS voltage across the combination of the elements can be calculated using the impedance of the circuit, which takes into account the phase relationships between the voltage and current across each element.

Therefore option "e" is false.

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The frequency of the wave as it passes through helium is approximately 4975.30 Hz.

To determine the frequency of the 838 Hz wave as it passes through helium after passing through steel, we can use the formula:
v1 * f1 = v2 * f2
where v1 is the velocity in steel (5941 m/s), f1 is the frequency in steel (838 Hz), v2 is the velocity in helium (999 m/s), and f2 is the frequency in helium which we want to find.
Step 1: Write down the given values.
v1 = 5941 m/s
f1 = 838 Hz
v2 = 999 m/s
Step 2: Write down the formula and substitute the given values.
v1 * f1 = v2 * f2
5941 * 838 = 999 * f2
Step 3: Calculate the product of v1 and f1.
4970326 = 999 * f2
Step 4: Divide both sides by 999 to solve for f2.
f2 = 4970326 / 999
Step 5: Calculate the frequency in helium (f2).
f2 ≈ 4975.30 Hz

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The magnitude of the normal force on the block will be equal to (Mg + F sin) in Case 1 only after analysis. Correct answer is A) case 1 only.

To answer this question, we need to understand the terms and analyze each case. Here, M represents the mass of the block, g is the acceleration due to gravity, and F sin is the vertical component of a force F acting on the block.

Case 1: The block is on a horizontal surface, and force F is acting vertically upward.
In this case, the normal force (N) is balancing the weight of the block (Mg), and the vertical component of force F (F sin) is added to it. So, the total force is (Mg + F sin).

Case 2: The block is on an inclined plane, and force F is acting perpendicular to the surface of the plane.
In this case, the normal force (N) is balancing the weight of the block (Mg) and the vertical component of force F (F sin) is not affecting the normal force. The total force on the block is Mg, not (Mg + F sin).

Case 3: The block is on a horizontal surface, and force F is acting horizontally.
In this case, the normal force (N) is balancing the weight of the block (Mg) and the force F is acting horizontally, which does not affect the normal force. The total force on the block is Mg, not (Mg + F sin).

Based on the analysis, the magnitude of the normal force on the block will be equal to (Mg + F sin) in Case 1 only.

So, the correct answer is A) case 1 only.

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To calculate the maximum displacement of air molecules when a 440-hz sound wave passes with an intensity of 120 dB, we can use the formula:

Maximum displacement = (Pressure amplitude / Atmospheric pressure) x (2 / Pi) x (1 / Frequency)

At the threshold of pain, the sound wave has an intensity of 120 dB, which corresponds to a pressure amplitude of 20 Pa. The atmospheric pressure at sea level is around 101325 Pa.

Plugging in the values, we get:

Maximum displacement = (20 / 101325) x (2 / Pi) x (1 / 440)
Maximum displacement = 2.6 x 10^-8 meters

Therefore, the maximum displacement of air molecules when a 440-hz sound wave passes with an intensity of 120 dB is 2.6 x 10^-8 meters.

To find the pressure amplitude in the wave, we can use the formula:

Pressure amplitude = 10^(Intensity / 20) x Atmospheric pressure

Plugging in the values, we get:

Pressure amplitude = 10^(120 / 20) x 101325
Pressure amplitude = 20 Pa

Therefore, the pressure amplitude in the 440-hz sound wave with an intensity of 120 dB is 20 Pa.

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10% of more girls are likely to work than boys.

option A.

The percentage of girls who are more likely to work than boys are calculated as follows;

Total number of boys = 18 + 12 = 30

Number of boys who works = 18

Percentage = 18/30 x 100% = 60%

Total number of girls = 14 + 6 = 20

Number of girls who works = 14

Percentage = 14/20 x 100% = 70%

Difference = 70% - 60% = 10%

So 10% of more girls are likely to work than boys.

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