A student wants to determine if a gas or electric car is able to accelerate
at a faster velocity. Using the information below determine if the
electric or gas car has a fast rate of acceleration?
a. A 1957 Porsche has a rate of 0-30 mph in .00063 hr.
b. An Electric Speedster has an acceleration of 12.5m/hr in .0011hr

The force exerted by b on a is given by 1.90N along the left.

Let the charge of the particle 'a' and 'b' be q and Q respectively.

Given,

The force exerted ([tex]F_{ab}[/tex]) when the two particles are at distance (d = 12.9 mm) is 2.66 N from a to b.

So, [tex]F_{ab} = \frac{kqQ}{d^2} \hat{x}[/tex] (along the right)

[tex]\implies F_{ab} \times d^2 = kqQ\\\implies kqQ = 2.66 N \times 12.9 mm\\\implies kqQ = 34.314 Nmm[/tex]

Now after the separation between them is 18 mm

The force on a due to b when the distance between them is (D = 18mm) is ([tex]F_{ba}[/tex])

i.e. [tex]F_{ba} = \frac{kqQ}{D^2}(-\hat{x})[/tex] (along the left)

[tex]\implies kqQ = -F_{ba}\times D^2 \\\implies 34.314 Nmm = -F_{ba} \times 18mm\\\implies F_{ba} = -1.90 N[/tex]

Hence the force exerted by b on a is given by 1.90N along the left.

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A magnet can hold a piece of paper to the door of a refrigerator. The magnet stick without touching the door because C. The magnetic force of the magnet can act at a distance.

The magnetic force is a force which is responsible for magnets attracting or repelling one another. The magnetic force is the attraction or repulsion force that exists between electrically charged particles as a result of their motion. A compass, a motor, the magnets that hold things on the refrigerator, train tracks, and new roller coasters are all examples of magnetic force.

Magnets easily stick to refrigerators because they are made of steel, which is ferromagnetic. Therefore, a magnet can hold a piece of paper to the door of a refrigerator without touching the door because the magnetic force of the magnet can act at a distance.

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A vector measurement of the rate and direction of motion is how physics defines velocity.

Thus, velocity is a measurement of the speed at which an object is moving. The velocity equation is defined as the change in an object's position, divided by the passage of time. When you use the velocity formula, you obtain more clearance.

The rate of change in displacement over time is referred to as the velocity.

The velocity formula in physics is as follows:

                              [tex]v = d/t[/tex]

V= 9 m/s

Time= 19.25 s

distance = 9 / 19.25 = 2.138

Velocity Equation:

 Initial Velocity 2.138 m

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The magnitude of the vector is [tex]44.20 units[/tex]

The direction of the vector is [tex]-56.34 deg[/tex]

Magnitude is simply "distance or quantity" in physics. It illustrates the absolute or relative size, direction, or motion of an object. It is employed to describe something's size or range. Magnitude in physics typically describes a size or quantity.

"How much of a quantity" is how the word "magnitude" is defined. The magnitude, for instance, can be used to explain a comparison of the speeds of a car and a bicycle. Additionally, it can be used to describe how far an object has travelled or how much of an object is represented by its magnitude.

let A = [tex]A_x i+A_y j[/tex]  is a vector.

x-component of the vector A is [tex]A_x =-24.5 i[/tex]

y-component of the vector A is [tex]A_y =32.8 j[/tex]

[tex]44.20 units[/tex][tex]44.20 units[/tex]

Magnitude of the vector A is

A = [tex]\sqrt(-24.5)^2+(36.2)^2[/tex]

  = [tex]43.71[/tex]

Direction θ = [tex]tan^-1(A_y/A_x)[/tex]

                  = [tex](36.8/-24.5)[/tex]

                 = [tex]-56.34 deg[/tex]

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When designing a ship and spacesuits for astronauts to use in zero gravity, it is important to take into consideration Newton's laws of motion. For instance, the ship and spacesuits should be designed to minimize or eliminate the effects of inertia, which will allow the astronauts to move more easily.

Additionally, the ship and suits should be light and streamlined to minimize air resistance and drag in the vacuum of space. Finally, the ship and suits should be designed to provide adequate protection from the extreme temperatures of space. All of these design considerations should take into account Newton's laws of motion to ensure the safety and comfort of the astronauts.

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A) The population of Alaska is expected to be 1083.173 thousand at the end of year 2022.

B) Alaska’s population is expected to reach 850,000 at the end of 14.160 years after the end of 2000.

Population of Alaska at the end of x years is given as: A(x) = 0.638x^2 + 6.671x + 627.619 thousand people……..(i)

To find the population of Alaska in the year 2022,

x= 0 in the year 2000

therefore, x= 22 in the year 2022

putting value in x in equation (i),

A(22) = 0.638(22^2) + 6.671*22 + 627.619= 1083.173 thousand people

The number of years it will take for Alaska to exceed 850000 people is,

Since the population equation is provided in thousand, the equation now becomes:

A(x) = 0.638x^2 + 6.671x + 627.619= 850

0.638x^2 + 6.671x – 222.381= 0

Using Sridhar Acharya’s formula,

x=(-b±√(b^2-4ac))/2a

x= (-6.671 ± √((6.671^2)- 4*(0.638*(-222.381))))/2*0.638

x = (-6.671 ±  √(44.502 +567.51))/1.276

x = (-6.671+ 24.739)/1.276 or (-6.671 - 24.739)/1.276

x= 14.16 or -24.61

therefore, the number of years that Alaska will take to exceed its population above 850000 is 14.16 years from 2000

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calculate the % of L-dopa in the solution, we can use the following equation:

% L-dopa = 100 * (specific rotation of solution - specific rotation of enantiomer) / (specific rotation of L-dopa - specific rotation of enantiomer)

The specific rotation of the enantiomer is the same magnitude as the specific rotation of L-dopa, but opposite in sign. So, the specific rotation of the enantiomer is 39.5.

Plugging in the values:

% L-dopa = 100 * (-19.75 - 39.5) / (-39.5 - 39.5) = 100 * (59.25) / 0 = undefined

Since the denominator is zero, the % L-dopa is undefined.

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A solution contains 25.0 g of nano3 per 110.0 g of solution, then the concentration in ppm is 0.5 ppm.

Concentration in parts per million (ppm) indicates how many parts of solute are in 1,000,000 parts of solution. For example, saline is a dilute aqueous solution of sodium chloride NaCl(aq) with a concentration of 9,000 ppm.

The key point of PPM is to indicate how many "units" of substance A are for every million total units of solution or mixture. Percentages, in contrast, are very similar measures to PPMs, as they tell you how much there is "out of 100". Just like we can say we have a 7% solution, we can say we have a 36 PPM solution.

The most important thing to remember when performing PPM calculations is that the units you choose for the solution and the units of the substance of interest must be the same. For example, you cannot use solute mass and total solution volume. To get reasonable results, you should use mass and mass or volume.

It is the ratio of the number of grams of solute for every one million grams of solution

Therefore,

ppm = gram of solution/ grams of solute ×10⁶

= 5.0×10⁻⁵/100  ×10⁶

=0.5 ppm

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Astronauts and their spacecraft still have mass and are subject to the effects of Earth's gravity while they are in space. In this way, even though the gravitational pull of the Earth is weaker in space than it is on Earth's surface, objects still have weight.

All objects fall at the same pace due to gravity in a vacuum. It is irrelevant how much mass the thing has.

"The force that gravity exerts on the item," according to our textbook, is how weight is defined. The astronauts are weightless since space has zero gravity. But since mass is a measure of how much matter is there, they are not massless. Independent of gravity, mass may be measured.

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"The diode model which includes the large reverse resistance is the complete model."

The barrier potential, the modest forward dynamic resistance, and the huge internal reverse resistance make up the entire concept of a diode. Because it provides a pathway for the reverse current, which is taken into account in this diode model, the reverse resistance is taken into consideration.

The complete diode model is the most accurate approximation and includes the barrier potential, the small forward dynamic resistance and the large internal reverse resistance.

The diode functions as a closed switch when it is forward-biased.

In parallel with the substantial internal reverse resistance, the diode functions as an open switch when it is reverse-biased.

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The momentum of a photoelectron can not be determined solely from the wavelength of light used to irradiate a metal.  The incident light of wavelength 500 nm has a lower energy than the light of wavelength 620 nm, so the momentum of the photoelectron would be smaller in the former case.

The momentum of the photoelectron depends on several factors such as the energy of the incident photon, the binding energy of the electron in the metal, and the interaction between the light and the metal. In general, the larger the energy of the incident photon, the larger the momentum of the photoelectron. The incident light of wavelength 500 nm has a lower energy than the light of wavelength 620 nm, so the momentum of the photoelectron would be smaller in the former case.

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Answer: A moving block , a moving trailer and a rolling block.

Explanation:

Earth's mass is approximately 81 times greater than the Moon's mass. Earth has a mass of approximately 5.97 x 10^24 kilograms, while the Moon has a mass of approximately 7.34 x 10^22 kilograms.

Why Earth's mass is more than Moon's mass?

Earth's mass is much greater than the Moon's due to its larger size and composition. Earth is a terrestrial planet with a dense iron-nickel core, while the Moon is a smaller, rocky satellite.

Earth's greater size allowed it to retain more heat and develop a stronger gravitational field, which in turn allowed it to retain more volatile elements and heavier elements that would have otherwise been lost to space. This led to a more massive planet with a much stronger gravitational pull, which makes it about 81 times more massive than the Moon.

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When a stomp rocket is launched straight into the air and is being watched by students 500 meters away. after 2 seconds, and the angle of elevation is the angle is increasing at a rate of 0.4 radians per second, the speed of the stomp rocket is 625m/s

We know that when an object is very far away, at the center of that object there is an angle enclosed by the observer and that is given

angle=(length of arc)/radius of the arc.

So, we are given that length of the arc is 500 meters and the angle is 0.4 radians/sec.

So,

0.4=500/r

r=500/0.4

r=1250m

Now we are given the time when it is observed i.e. 2 seconds.

So, we apply the distance speed formula.,

which is Distance=Speed × Time

1250=Speed×2

Speed=1250/2

Speed =625m/s

Does the angle of elevation increases when the point of observation moves toward the object?

The angle of elevation is the angle between the horizontal line from the observer and the line of sight to an object that is above the horizontal line. As the person moves from one point to another angle of elevation varies. If we move closer to the object the angle of elevation increases and vice versa.

When the angle of elevation is?

The angle of elevation is an angle that is formed between the horizontal line and the line of sight. If the line of sight is upward from the horizontal line, then the angle formed is an angle of elevation.

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At distance 319m from the foot of the cliff does it strike the ground.

It strikes the ground 3.2x10^4 meters from the base of the cliff

Let's write our given variables:

initial velocity  (V)=600m/s

angle of incline  (θ)=30°

initial height  (h)=20m

acceleration due to gravity  (g)=9.81m/s2

To Find:  we first need to understand that there are two basic types of motion for this type of projectile motion. Accelerated vertical (or "y-axis") motion and smooth horizontal (or "x-axis") motion. The vertical component of motion is affected by gravitational acceleration, but the projectile's horizontal velocity remains the same throughout. We unrealistically assume that drag is ineffective without drag because there are too many unknown factors that need to be resolved. Find the initial vertical and horizontal velocities.

Sinθ = opposite/hypotenuse

        = V(y)/V

V(y) = V(Sinθ)

V(y) = 600m/s × Sin(30°)

V(y) = 300m/s

This vertical speed will be altered over time by the Earth's gravity.

Cosθ = adjacent /hypotenuse

         =V(x)/V

V(x) = V(Cosθ)

V(x) = 600m/s × Cos(30°)

V(x) = 519.6152423m/s

Since this is a uniform horizontal velocity, to solve for horizontal distance using the formula v=d/t

All we need to do is find the time the projectile is in the air. First, solve for the time it takes for the projectile to reach the summit, which is known to have a velocity of 0 m/s because it is perfectly stationary for a moment.

V(f) = V + at = V(y) + gt₁

t₁ = (V(f)−V(y) /g

t₁ = (0m/s−300m/s)/(−9.81m/s2)

t₁ = 30.58103976s

Next,  the time for it to reach the ground, and for this we need total height at the apex, which will be the vertical distance travelled plus the initial 20m of the cliff:

d = (V(f)+V)/2)t₁ + 20m

d = (0m/s+300m/s)/2) × 30.58103976s + 20m

d = 4607.155963m

With this distance we can find the time it takes for the projectile to reach the ground from its apex:

d = V(t) + (1/2)

t₂ = (2d−Vit2)/g

t₂ = √((2(4607.155963m)−(0m/s×t2))/(9.81m/s2))

t₂ = 30.64763391s

Now, we put the two times together:

t =t₁+t₂ = 30.58103976s + 30.64763391s

t = 61.22867367s

Finally, we go back to the x-axis and use this time to solve for the horizontal distance the projectile has moved to the point of impact:

V = d/t

d = V (x) (t)

d = 519.6152423m/s × 61.22867367s

d = 319 m

The projectile strikes the ground at a distance of 3.2x10⁴ meters from the base of the cliff.

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The density of earth is 5500 kg/m3 and the density of sun is 0.256 times the density of Earth.

Given that Earth's volume is 5500 kg/m3,

When comparing the density of the Sun with the Earth, we must split the:

The ratio of Earth's density to that of the Sun is 0.256, or 1410 kg/m3 to 5,500 kg/m3.

The sun has a density that is 0.256 times that of Earth.

The density of the Earth is 5.52 grams per cubic centimeter, as determined by a number of measurement techniques. 5520 kilos per cubic meter is [this value's equivalent. The earth's mass per cubic centimeter is 5.514 g/cm3. r = 6.37 106 meters is the radius of the earth. We may calculate the needed average density of the stuff in the earth as 5.514 gm/cm3 by dividing the mass of the Earth by its volume. Earth has an average density of 51 g/cm3.

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In the experiments conducted by Avery, McCarty, and MacLeod on griffith's transforming principle, they investigated the role of bacteria's genetic material in causing pneumonia.

In their experiments, they used a strain of bacteria that did not cause pneumonia (smooth strain) and a strain of bacteria that did cause pneumonia (rough strain). If they found that transforming the smooth strain with genetic material from the rough strain resulted in the bacteria causing pneumonia, this would indicate that lipids were not the transforming principle. On the other hand, if they found that transforming the smooth strain with genetic material from the rough strain did not result in the bacteria causing pneumonia, this would indicate that lipids were the transforming principle.

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The mass of a golf ball can be calculated using the principle of conservation of mass.

The mass of a golf ball can be determined through the principle of conservation of mass by weighing the ball before and after a process that does not change its mass and subtracting any mass change from the total mass to find the mass of the golf ball alone.

To do this, you need to weigh a golf ball before and after a process that does not change its mass, such as immersing it in water or exposing it to a different temperature.

For example, to find the mass of a golf ball using the principle of conservation of mass, you would first weigh the ball on a scale to find its dry mass, then immerse it in water and weigh it again to find its mass in water. The difference between the two masses would be the mass of water that the golf ball displaced, which can be subtracted from the total mass to find the mass of the golf ball alone.

It's important to note that the accuracy of the measurement will depend on the precision of the scale used and the controlled conditions of the experiment, such as the temperature and pressure of the water and the room. Additionally, it's essential to consider the buoyant force that acts on an object immersed in a fluid, which can affect the accuracy of the measurement.

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Answer:

Explanation: the coldest

Mercury is the warmest planet in the solar system due to its heavy covering of dioxide and other hot gases that block the sun's heat from reaching it.

Describe planet.

- Definition, Information About, Our Solar System Describe Planet. Planet literally translates to "wanderer." This is due to the fact that the planets do seem to drift aimlessly through the night sky. Although the stars appear stationary in relation to one another, they do migrate across the sky from east to west.

What purpose does a planet serve?

A planet, it was claimed, must accomplish three things. It may seem evident at first that it must orbit the sun. Second, it needs to be large enough for gravity to pull into a spherical shape.

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The semiconductor's elements which are used in the power electronics are  silicon, germanium, tin, selenium and tellurium.

Germanium is a pure element that is frequently used with gallium, arsenic, or other elements. It is also a semiconductor that is utilised as a transistor in countless electronic applications. Nevertheless, alternative semiconductors have since taken its position. High indexes of diffraction and scattering characterise germanium oxide.

In electronics, solder accounts for 50% of all tin utilisation. The "glue" that holds everything electronic together is solder. Robots, computers, electric vehicles (EVs), power storage, and renewable energies will be the backbone of our clean, new technological future. All of them demand more circuits and semiconductors, all which demand more tin.

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The acceleration of the body after 5 seconds is  2 m/s².

The acceleration of the body after 5 seconds is the rate of change of velocity of the body with time.

Mathematically, the formula for the acceleration of an object is calculated as follows;

a = ( Δv ) / ( Δt )

a = ( v - u ) / ( t₂ - t₁ )

where;

a = ( 10 m/s - 0 m/s ) / ( 5 s  - 0 s )

a = 2 m/s²

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The time it takes a spacecraft to travel from Earth to the Sun depends on its speed and trajectory. On average, it takes about 3-4 months for a spacecraft to reach the Sun using conventional propulsion methods.

Space travel from Earth to the Sun is a significant undertaking that requires precise planning and execution. The time it takes for a spacecraft to reach the Sun depends on multiple factors, including its speed and the trajectory it follows. Conventional propulsion methods, such as chemical rockets, are typically used to send spacecraft to the Sun.

These missions typically take 3-4 months to complete, although the exact time can vary depending on the specific mission parameters. Factors such as the launch date, the size of the spacecraft, and the mission objectives can all impact the duration of the journey.

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The time it takes for a spacecraft to travel from the Earth to the Sun depends on various factors such as the spacecraft's speed and trajectory.

On average, it takes a spacecraft approximately 3 to 9 months to travel from the Earth to the Sun using a direct trajectory. However, some missions, such as NASA's Parker Solar Probe, take advantage of gravity assists from planets to reduce the travel time and arrive at their destination in a shorter period of time. The specific travel time for a spacecraft depends on the mission's goals and objectives, the spacecraft's design and capabilities, and the trajectory selected by mission planners. The average distance from the Earth to the Sun is about 93 million miles (149.6 million kilometers). The journey from the Earth to the Sun is a long and complex mission that requires careful planning and execution.

Spacecraft traveling to the Sun typically use a combination of gravity assists from planets and their own propulsion systems to complete the journey. Gravity assists from planets allow the spacecraft to gain speed and alter its trajectory, reducing the total travel time and fuel requirements.

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The magnitude of the net force acting on the car is 33.66 N.

To calculate the net force acting on the car, we can use the formula:

Force = mass x acceleration

where acceleration can be calculated using the change in velocity. To convert the velocity units to SI units, we first convert km/h to m/s:

[tex]48.0 km/h = (48.0 x 1000/3600) m/s = 13.33 m/s\\59.0 km/h = (59.0 x 1000/3600) m/s = 16.39 m/s[/tex]

The change in velocity is then given by:

[tex]Δv = v_f - v_i = 16.39 m/s - 13.33 m/s = 3.06 m/s[/tex]

The acceleration can then be calculated as:

a = Δv / Δt

where Δt is the time taken to cover the 100 m distance. We can assume this to be a constant, so:

[tex]a = Δv / Δd = 3.06 m/s / 100 m = 0.0306 m/s^2[/tex]

Finally, the net force can be calculated as:

Force = [tex]m x a = 1100 kg x 0.0306 m/s^2 = 33.66 N[/tex]

The magnitude of the net force acting on the car is 33.66 N.

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Density of mercury The density of liquid mercury is 13.6g cm3 . 68 moles of mercury are there in 1 liter of the metal.

What is density ?

The term "density" refers to the ratio between the volume (the amount of space taken up by an object or substance) and the amount of matter contained therein (its mass). The amount of mass per unit of volume is another method to define density. An object has a high density if it is both heavy and small.

What is mole ?

A mole is the atom's elementary particle, an ion. The mole of the substance is always related to the Avogadro number. The mole is always associated with the weight or mass of the element or substance. The standard unit of a mole is mol. The mole is a significant factor of the reactant and products to form an equation. A mole calculates the atom, ion, and substance weighs.

Therefore, Density of mercury The density of liquid mercury is 13.6g cm3 . 68 moles of mercury are there in 1 liter of the metal.

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The electric field does -423.85 × 10^-6 J of work in moving the -7.7 µC charge from ground to a point whose potential is 55 V higher.

The work done by an electric field on a charge can be calculated using the equation:

W = qΔV

where W is the work done, q is the charge of the object, and ΔV is the change in potential energy.

For the given situation, q = -7.7 µC and ΔV = 55 V. Thus,

W = (-7.7 × 10^-6 C) × (55 V) = -423.85 × 10^-6 J

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The density of an object can be calculated using the equation density = mass / volume.

Density is a measurement of the mass per unit volume of an object. Or it could also be interpreted as a comparison between the mass and volume of an object, as reported by the Ministry of Education and Culture's Learning Resources website.

The higher the density of an object, the greater the mass of each volume. The average density of each object is the total mass divided by the total volume.

An example of an object that has a higher density is iron, while an example of an object that has a lower density is water.

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Customary fluid liter of liquid weighs a substantial 33.814 fluid ounces, or 4 and 2/8 cups' worth.

A fluid ounce, often known as fl oz, fl. oz, or oz. fl, is a unit of liquid volume equal to 1/16 of a US liquids pint, or 1/128 of a US litre in the US system, or 1/20 of a pint and 1/160 of an Oblate spheroid in the imperial system.

Instead, we utilize fluid ounces, teaspoons, pints, quarters, and gallons when determining the density of a solution using U.S. generally utilized units, with gallons serving as the smallest and largest measurement units, respectively.

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The movement of a positive charge particle all along electric field, either from greater potential to lower potential. That is a drop in the charge's electric potential energy.

Potential energy being a form of battery bank that depends on how various system elements interact with one another. A spring's potential energy rises when it is crushed or stretched. Potential energy is something that is not transformed to kinetic energy.

Everything with mass naturally possesses potential energy, which is a product of matter. But an elastomeric or gravitation force is needed to add energy potential into the substance. Without forces, gravitational potential wouldn't exist.

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Based on the change in momentum of the bowling ball, the force the pillow exerts on the bowling ball to stop it is 12.15 N.

The force the pillow exerts on the bowling ball to stop it is calculated as follows:

Force * time = change in momentum

F * t = mv - mu

where;

F is stopping force

t is the stopping time = 0.67 seconds

m is the mass of the ball = 3.7 kg

v is the initial velocity of the ball = 2.2 m/s

u is the final velocity = 0 m/s

F = m(v - u)/t

F = 3.7(0 - 2.2)/0.67

F = -12.15 N

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Complete question:

A bowling ball of mass 3.7 kg is rolled down the lane with a velocity of 2.2 m/s. Further down the lane, the bowling ball from problem 3 gets stopped by a pillow in a total of 0.67 seconds. What force did the pillow exert on the bowling ball to bring it to rest?

The correct option is option B) Electronegativity

Electronegativity is a chemical property that determines how strongly an atom attracts electrons toward itself within a bond.

An atom with a higher electronegativity will attract the shared electrons more strongly than an atom with a lower electronegativity. This leads to a partial negative charge on the atom with the higher electronegativity and a partial positive charge on the atom with the lower electronegativity, resulting in a polar covalent bond.

Electronegativity is related to the electron configuration of an atom and its atomic number, with elements towards the right and top of the periodic table typically having higher electronegativities.

It is important to note that electronegativity is not to be confused with other properties such as electron affinity (the energy change that occurs when an electron is added to a neutral atom), ionization energy (the energy required to remove an electron from an atom), and valence (the number of electrons an atom can donate or accept to form a chemical bond).

Therefore, The correct option is option B) Electronegativity

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