8. The gravitational field strength between two objects
is the sum of two vectors pointing in opposite
directions. Somewhere between the objects, the
vectors will cancel, and the total force will be zero.
Determine the location of zero force as a fraction of
the distance r between the centres of two objects
of mass m, and m₂.

If, during the second analysis, the AED prompts "no shock advised," you should check the pad placement on the person's chest.

It's important to make sure the pads are properly attached and in the correct location. After confirming pad placement, you should resume CPR until the AED reanalyzes or until you find an obvious sign of life. Do not reset the AED by turning it off or unplug the connector from the machine. Keep following the AED prompts and administering CPR as necessary until emergency medical services arrive.
If, during the second analysis, the AED prompts "no shock advised," you should:
1. Check the pad placement on the person's chest to ensure proper connection and positioning.
2. Resume CPR until the AED reanalyzes or you find an obvious sign of life.
There is no need to reset the AED by turning it off or unplugging the connector, as "no shock advised" means the device has analyzed the situation and determined that a shock is not necessary at that moment. Continue following the AED prompts and providing CPR as needed.

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The average force exerted on the meteorite by the car was about 7,200 N.

What is Force?

Force is a physical quantity that describes the interaction between objects or systems that can cause them to accelerate or deform. It is a vector quantity, which means that it has both magnitude and direction. The unit of force is the newton (N), which is defined as the amount of force required to accelerate a mass of 1 kilogram by 1 meter per second squared .

To calculate the average force exerted on the meteorite by the car, we can use the impulse-momentum theorem, which states that the impulse applied to an object is equal to its change in momentum. The impulse can be calculated as the product of the force and the time interval during which it acts, while the change in momentum can be calculated as the mass of the meteorite times its initial velocity.

The time interval during which the force acts is not given, but assuming that it is very short (on the order of milliseconds), we can use the equation:

impulse = force x time = change in momentum = mass x (final velocity - initial velocity)

Rearranging this equation to solve for the force, we get:

force = (mass x (final velocity - initial velocity)) / time

The mass of the meteorite is not given, but we can assume that it is 12.25 kg (27 pounds converted to kilograms). The final velocity of the meteorite is zero, since it comes to a complete stop after striking the car. The time interval is unknown, but we can assume that it is very short (on the order of milliseconds).

Substituting the given values into the equation, we get:

force = (12.25 kg x (0 m/s - 540 m/s)) / time

To express the answer in two significant figures, we can round the result to the nearest hundred newtons.

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The correct statement concerning the capacitance is  (B) C₂ > C₃.

A system's capacitance is its capacity to store an electric charge. It is described as the relationship between the electric charge on each conductor and their respective potential differences.

Since all the capacitors have the same plate area, the capacitance of a parallel-plate capacitor is given by the formula:

C = εA/d

where C is the capacitance, ε is the permittivity of the dielectric material between the plates, A is the area of each plate, and d is the distance between the plates.

The distance between the plates of C₂ are closer together than those of C₃, according to the illustration provided in the question. Therefore, if the permittivity of the dielectric material between the plates is the same for both capacitors, the capacitance of C₂ will be larger than the capacitance of C₃.

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The largest that θ can be if the tube is in air is approximately 0.71 times the radius of the tube. The largest that θ can be if the tube is immersed in water is approximately 0.70 times the radius of the tube.

To ensure that all the light reflects back into the tube, the angle of incidence at face AB must be greater than the critical angle, which is given by:

[tex]\theta_c = sin^{-1}(1/n)[/tex]

where n is the refractive index of the medium surrounding the tube.

a) If the tube is in air, n = 1. Therefore, the critical angle is:

[tex]\theta_c = sin^{-1}(1/1.60) = 39.26 \textdegree[/tex]

Therefore, the largest that θ can be is when angle ABE is equal to 50.74 degrees. Using trigonometry, we can find that:

sin(50.74) = b / (2r)

where r is the radius of the tube. Rearranging, we get:

b = 2rsin(50.74) ≈ 0.71r

b) If the tube is immersed in water of refractive index 1.333, then the critical angle is:

[tex]\theta_c = sin^{-1}(1/1.333) = 48.76\textdegree[/tex]

Using similar reasoning as in part (a), we can find that the largest that θ can be is when angle ABE is equal to 90 - 48.76 = 41.24 degrees. Using trigonometry, we get:

sin(41.24) = b / (2r)

where r is the radius of the tube. Rearranging, we get:

b = 2rsin(41.24) ≈ 0.70r

Refractive index is a fundamental concept in optics that describes how light propagates through different materials. It is described as the proportion of a material's light speed to the speed of light in a vacuum. The refractive index determines the angle at which light is refracted or bent as it passes from one material to another.

Every material has a unique refractive index, and this property can be used to identify unknown materials, measure their concentration, and determine their optical properties. The refractive index is also used in the design and analysis of optical devices such as lenses, prisms, and fibers. The refractive index depends on various factors such as the wavelength of light, temperature, and pressure. It is a dimensionless quantity and typically ranges from about 1.0 for air to over 2.4 for some types of glass. The higher the refractive index of a material, the more it bends light, and the greater the optical power it possesses.

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Complete Question:-

Light enters a solid tube made of plastic having an index of refraction of 1.60. The light travels parallel to the upper part of the tube. You want to cut the face AB so that all the light will reflect back into the tube after it first strikes that face.

a) What is the largest that θ can be if the tube is in air?

b) If the tube is immersed in water of refractive index 1.333, what is the largest that θ can be?

The time measured by the person in the spaceship from the clock on your wall will be relativistic (dilated) time. So, the answer is A.

The theory of relativity, which states that time is relative and depends on the observer's motion and gravitational field. The faster an object moves, the slower time passes for it relative to a stationary observer.

This effect is known as time dilation. In this scenario, the spaceship is moving at 85% of the speed of light, which means time will pass slower for the person on the spaceship compared to the person sitting in the living room.

Therefore, the person on the spaceship will measure less than an hour of time on their clock, while the person in the living room will measure exactly one hour.

Proper time refers to the time measured by an object in its own rest frame, and contracted time refers to the apparent reduction in length of a moving object. Neither of these concepts are applicable in this scenario.

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Deprotonation of a terminal alkyne results in an alkynide ion, which exhibits a negative charge associated with a lone pair that occupies a(n) sp hybridized orbital.

When a terminal alkyne undergoes deprotonation, the removal of a proton from the terminal carbon atom results in the formation of an alkynide ion. The alkynide ion contains a negative charge that is associated with a lone pair of electrons, which occupies a p-orbital. This p-orbital is perpendicular to the plane of the molecule and lies along the axis of the carbon-carbon triple bond.

The alkynide ion is a very strong base due to the stability of the resulting anion. This base can be used in various reactions to form new carbon-carbon bonds or as a nucleophile in substitution reactions. Additionally, alkynide ions can be used as ligands in organometallic chemistry due to their ability to donate electrons to metal centers. In summary, deprotonation of a terminal alkyne leads to the formation of an alkynide ion that has a negative charge associated with a lone pair of electrons occupying a p-orbital.

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Each scenario describes a spring with a certain spring constant (k) and a compression distance (x):

Scenario A: k = 3 N/m, x = 1.0 m

Scenario B: k = 6 N/m, x = 0.8 m

Scenario C: k = 9 N/m, x = 0.6 m

Scenario D: k = 12 N/m, x = 0.4 m

The spring constant is a measure of the spring's stiffness and is defined as the force necessary to stretch or compress the spring by a certain distance. The firmer the spring, the bigger the spring constant.   When a force is applied to a spring, the  contraction distance is the distance it's compressed from its normal length.

  Using the following formula, these circumstances may be used to  cipher the implicit energy stored in the compressed spring   kinetic energy = 1/2 * k * x2   where k denotes the spring constant and x denotes the  contraction distance.   The implicit energy held in the compressed spring is the energy that can be released when the spring is allowed to return to its original length.

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Answer:

P = I V = I^2 R        power lost in wire

I (current) and R (resistance) need to be kept small to minimize power lost in wire - explains why very high voltages are used in power transmission

To transmit electric energy economically over long distances, it is important to keep certain electric quantities small. These include: Resistance; Current; Voltage drop; Capacitance and inductance.

Overall, the key to transmitting electric energy economically over long distances is to minimize energy losses by keeping electric quantities such as resistance, current, voltage drop, capacitance, and inductance as small as possible.

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Emission spectrophotometric techniques are generally more sensitive than absorbance techniques because they measure the light emitted by a sample after excitation, rather than measuring the light absorbed by a sample. This allows for more detailed analysis of the sample, as the emission spectrum provides information on the energy levels and transitions within the sample.

Additionally, emission spectrophotometric techniques are less prone to interference from background absorption or scattering, which can reduce the sensitivity of absorbance techniques.

Overall, the detailed information provided by emission spectrophotometric techniques allows for more sensitive and accurate analysis of a sample's properties.

Emission spectrophotometric techniques are generally more sensitive than absorbance techniques because they detect emitted radiation from the sample rather than measuring the absorbed radiation. This results in a higher signal-to-noise ratio and lower detection limits, making emission techniques more sensitive for trace analysis.

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Helium has the lowest boiling point of any substance, at 4.2 K. We have to find this temperature in C and F.

The boiling point of helium is 4.2 K, which is equivalent to -268.95°C or -452.11°F. To convert from Kelvin to Celsius, subtract 273.15 from the Kelvin temperature. Therefore, 4.2 K is equal to -268.95°C. To convert from Celsius to Fahrenheit, using the formula F = (C x 1.8) + 32. Therefore, -268.95°C is equal to -452.11°F.

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Answer:

To find the resulting change in momentum of the system, we need to calculate the momentum of the system before and after the external force is exerted, and then find the difference.

The momentum of a system of particles is the product of the total mass of the system and the velocity of its center of mass. From the graph, we can see that the velocity of the center of mass at t = 2.0 s is approximately 0.8 m/s.

Before the external force is exerted, the momentum of the system is:

p1 = m*v1 = 6.0 kg * 0.8 m/s = 4.8 kg m/s

After the external force is exerted, the velocity of the center of mass changes, and we can estimate it from the graph to be approximately -0.4 m/s at t = 2.0 s + Δt, where Δt is a very short time interval. The momentum of the system after the external force is exerted is:

p2 = m*v2 = 6.0 kg * (-0.4 m/s) = -2.4 kg m/s

The resulting change in momentum of the system is:

Δp = p2 - p1 = (-2.4 kg m/s) - (4.8 kg m/s) = -7.2 kg m/s

Therefore, the resulting change in momentum of the system is -7.2 kg m/s.

The red wave has a greater amplitude because its height is greater than the height of the blue wave.

Both waves have the same wavelength because the distance between crests is the same.

They have the same frequency  because they are traveling at the same rate.

The amplitude of a periodic variable is described as a measure of its change in a single period.

The amplitude of a non-periodic signal is also its magnitude compared with a reference value.

We can say that the amplitude is half the distance between the maximum and minimum height.

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a) The scale would show an apparent weight of 961.0N  ; b) Scale would show an apparent weight of 435.8N.

Rate at which velocity of any object changes with time is called acceleration and it is vector quantity.

a. When the elevator starts to accelerate upwards at 3.0m/s², apparent weight of the person on scale will be:

Apparent weight = (mass of the person) x (acceleration due to gravity + acceleration of the elevator)

= 75kg x (9.81m/s² + 3.0m/s²)

= 75kg x 12.81m/s²

Apparent weight = 961.0N

Therefore, scale would show an apparent weight of 961.0N.

b. When the elevator starts to accelerate downwards at 4.0m/s², apparent weight of the person on the scale will be:

Apparent weight = (mass of the person) x (acceleration due to gravity - acceleration of the elevator)

= 75kg x (9.81m/s² - 4.0m/s²)

= 75kg x 5.81m/s²

Apparent weight = 435.8N

Therefore, scale would show an apparent weight of 435.8N.

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Those sound waves travel at a speed of 1904 meters per second.

The equation for velocity is v = (68 Hz)(28m) = 1904 m/s.

As with all waves, the relationship between the speed of sound, its frequency, and its wavelength is vw=f, where vw denotes the speed of sound, f denotes its frequency, and f denotes its wavelength.

The frequency of a wave is expressed in Hertz (Hz), which is the number of waves that pass by each second. A sound wave, for instance, might have a frequency of 450 Hz.

"The distance between the two successive crests or troughs of the light wave" is how wavelength of light is described. Using the Greek letter lambda (λ), it is identified.

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When a flexible object changes its shape, the com of the object can change location. It is true.

The center of mass (COM) may move as the shape of a flexible item changes because of changes in the distribution of mass inside the object. For instance, if a person leans forward while standing, more of their mass is now positioned in front of their feet, which causes the COM of their body to shift forward.

Similar to this, when a spring is compressed or extended, its COM will migrate toward the stretched end since there is more mass there. It is crucial to remember that the object's overall mass remains unchanged, and the rules of momentum and energy conservation continue to hold true.

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The air-pressurized rescue tool that gives rescuers the ability to lift or displace objects that cannot be lifted with other rescue equipment is called a lifting bag.

Lifting bags are air-pressurized devices made of durable materials such as rubber, nylon or PVC, and they come in different sizes and shapes depending on the load capacity and the type of object to be lifted. Lifting bags work by using compressed air to inflate and expand, creating a cushion of air that lifts the object off the ground.

Lifting bags can be used in combination with other rescue equipment, such as spreaders or cutters, to extricate victims from collapsed structures or overturned vehicles. One of the advantages of using lifting bags is that they are portable and easy to set up, making them ideal for rescue operations in remote or inaccessible locations.

They also provide a safer alternative to traditional lifting methods, such as using cranes or hoists, which can pose a risk to rescuers and bystanders. Overall, lifting bags are a versatile and valuable tool for rescuers, providing them with the ability to lift or displace objects that would otherwise be impossible to move.

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The tangential speed of a wad of chewing gum stuck to the rim of the wheel is 1291.086m/s.

The reciprocal of frequency, or the number of rotations per second, is the period of motion. As a result, the period of motion may be determined if the wheel rotates 4.77 times per second as follows:

Period = 1 / Frequency

Period = 1 / 4.77

Given that each rotation of the wheel completely encircles it, the tangential speed of a wad of chewing gum adhering to the rim is equal to the circumference of the wheel multiplied by the frequency. The formula for calculating a circle's circumference is:

Circumference = 2 × π ×radius

Plugging in the given radius of 43.1 cm, the formula becomes:

Circumference = 2 × π × 43.1

So, the tangential speed can be calculated as:

Tangential speed = Circumference × Frequency

Tangential speed = 2 × π × 43.1 × 4.77 = 1291.086m/s

Therefore , the the tangential speed of a wad of chewing gum stuck to the rim of the wheel would be 1291.086m/s.

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Stretching the elastic cord further increases the speed of waves in the cord.

This is because the tension in the cord increases with stretching, which increases the speed of waves in the cord according to the equation v = √(T/μ), where v is the wave speed, T is the tension in the cord, and μ is the linear density of the cord.

Increasing the wave frequency can also increase the speed of waves in the cord, as higher frequencies correspond to shorter wavelengths and thus less time for the wave to traverse a given length of the cord. However, this effect is relatively small compared to the effect of stretching the cord.

Increasing the wave amplitude and increasing the wavelength do not have a significant effect on the speed of waves in the cord.

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In an emergency situation where the electricity needs to be shut off in a science classroom, it is essential to have a design that allows for quick and easy access to the electrical outlets. One option could be to install a master power switch that controls the power supply to all the lab stations in the classroom.

This switch should be located in a prominent and easily accessible location, such as near the classroom entrance or by the teacher's desk.

Another option could be to use individual power strips for each lab station, but with a centrally located main power switch that controls all of the power strips. This would allow for a more flexible setup and easier access to the power supply in case of an emergency. In this case, it is important to ensure that the power strips are rated for the maximum electrical load that the lab equipment may require.

Regardless of the design chosen, it is important to ensure that the emergency shut-off switch or power strip is clearly marked and easily identifiable, so that in an emergency situation, anyone can quickly and easily turn off the power to the lab stations.

Additionally, it is important to have clear protocols and procedures in place for shutting off the power supply in the event of an emergency, and to ensure that all students and staff are trained on these protocols.

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The variation of the kinetic energy (Ek) of the cart with its distance (s) traveled is proportional to the distance (s), with the proportionality constant being the product of the mass (m) and acceleration (a).

To determine the variation of the kinetic energy (Ek) of the cart with its distance (s) traveled, consider the following:

1. Since the cart travels from rest along a horizontal surface with constant acceleration, we can use the equation: v^2 = u^2 + 2as, where v is the final velocity, u is the initial velocity (0 in this case), a is the acceleration, and s is the distance traveled.

2. Next, we know that the kinetic energy (Ek) of the cart is given by the equation: Ek = 0.5 * m * v^2, where m is the mass of the cart.

3. Substitute the first equation (v^2 = u^2 + 2as) into the second equation (Ek = 0.5 * m * v^2) to find the variation of Ek with s: Ek = 0.5 * m * (u^2 + 2as).

4. Since the initial velocity (u) is 0, the equation simplifies to: Ek = m * a * s.

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Answer:

The huge mass of the sun (about 1 million miles across) causes the constituent atoms to be closely packed causing large density of the sun (about that of water)

The average density of the sun is high because the enormous mass compresses the hydrogen and helium gases in its core, leading to extremely high pressure and temperature.

The average density of the Sun is high even though its composition is 99.9% by atoms and 98.5% by mass of hydrogen and helium gases due to the following factors:
Gravitational compression:

The Sun's immense mass causes a strong gravitational force, which compresses the hydrogen and helium gases in its core.

This compression increases the density of these gases.
High pressure and temperature:

The high pressure and temperature in the Sun's core, caused by gravitational compression, lead to an increased density.

In the core, temperatures reach up to 15 million Kelvin, and the pressure is around 250 billion times that of Earth's atmosphere.
Nuclear fusion:

The Sun's core is the site of nuclear fusion, where hydrogen atoms combine to form helium, releasing a tremendous amount of energy.

This process results in a slight decrease in the total number of atoms, contributing to the high density.
In summary, the average density of the Sun is high due to the combined effects of gravitational compression, high pressure and temperature, and nuclear fusion, despite its composition of predominantly hydrogen and helium gases.

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Answer:

The respiratory system is responsible for bringing the oxygen an organism will need to conduct cellular respiration. The respiratory system includes the lungs and other organs involved in breathing, such as:

When we inhale, oxygen from the air enters the lungs and diffuses into the bloodstream, where it is transported to the body's cells. Inside the cells, oxygen is used in the process of cellular respiration to produce energy in the form of ATP.

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The maximum density occurs at 4 degrees Celsius, and beyond this point, the density starts to decrease due to the unique structure of water molecules.

Within most of the temperature range where we find liquid water on Earth, the density of water increases as its temperature decreases. This occurs because water molecules move closer together and form more hydrogen bonds when the temperature drops.

As the temperature of water decreases, the kinetic energy of its molecules also decreases, which causes them to slow down and occupy less space. This results in an increased density of water. However, this trend only continues until the water reaches its maximum density at approximately 4 degrees Celsius (39.2 degrees Fahrenheit).

Beyond this point, the density of water starts to decrease again as it approaches its freezing point at 0 degrees Celsius (32 degrees Fahrenheit). This anomaly occurs because the hydrogen bonds in water form a hexagonal structure when the temperature is close to the freezing point. This unique structure creates open spaces within the water, causing it to expand and become less dense as it turns into ice. Within most of the temperature range of liquid water found on Earth, its density increases as the temperature decreases.

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The particles that make up material B are more closely packed together than the particles that make up material A. So, option A.

Density is defined as the measurement of the amount of matter in a given volume per unit.

Density of a material can be calculated by finding the ratio of mass of the material to the volume occupied by its particles.

The expression for density of the material can be given as,

Density, d = m/v

where m is the mass and v is the volume of the material.

So, from the equation, it is clear that the density of the material is directly proportional to its mass and inversely proportional to the volume of the material.

Since, the mass of the materials A and B are the same, their densities depend on their volume.

Therefore, for A to have higher density than B, it has a higher volume.

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The sound intensity level would increase by 20 decibels if 100 people shout instead of one. Hence option B is correct.

The sound intensity level (SIL) increases by 10*log(N), where N is the number of people shouting. With the help of this equation, we can determine the rise in SIL as follows: N₁ = 1 (one person shouting) and N₂ = 100 (100 people shouting) simultaneously,

ΔSIL = 10log(N₂/N₁)

ΔSIL = 10log(100/1)

ΔSIL = 10*2

ΔSIL = 20 dB

Therefore, the answer is B that says "The sound is 20 decibels higher".

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The de Broglie wavelength of a baseball when thrown is much smaller than the size of an atom's nucleus. This means that the wave-like behavior of the baseball is negligible compared to its particle-like behavior.

The de Broglie wavelength is a property of matter waves, which are waves that have a particle-like behavior. It is calculated by dividing Planck's constant by the momentum of the particle.

For macroscopic objects like a baseball, the momentum is high and the de Broglie wavelength is extremely small, making the wave-like behavior insignificant.

This principle is important in understanding the behavior of matter at the quantum level, where particles can exhibit both wave-like and particle-like behavior.

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Answer:

Visible light is  considered to be between

400 and 700 nanometers    4.00E-9 m to 7.00E-9m

Old terminology is 4000 to 7000 Angstrom units

4.00E-10 m to 7.00-10 m

Radial lines on the complex plane (i.e. lines of constant phase or angle) are associated with constant natural frequency of underdamped 2nd order response. Option b is correct.

Radial lines on the complex plane (i.e. lines of constant phase or angle) are associated with the natural frequency of an underdamped second-order response. In a second-order response, the system's output response will oscillate with a frequency equal to its natural frequency. When the system is underdamped, the output oscillations will decay exponentially over time, with a decay rate constant determined by the damping ratio.

The radial lines on the complex plane correspond to constant phase or angle of the system response. The angle of the response is related to the frequency of oscillation, and since the radial lines represent constant angle, they must correspond to constant frequency, which is the natural frequency of the system. Therefore, the correct answer is b.

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The total energy available increases proportionally to n, the width of the maxima changes inversely proportionally to n². So, as n increases, the width of the maxima will decrease.

Based on the question, we want to determine how the width of the maxima changes when the total energy available increases proportionally to the number of slits, n.

Using the given information, we know that:
1. The maxima fall at the same locations for any number of slits.
2. The peak intensity of the maxima is proportional to n².
3. The total energy at the screen is roughly equal to the product of the number of maxima, peak intensity of a maximum, and the width of a maximum.

Since the total energy available increases proportionally to n, we can write this relationship as:
Total Energy ∝ n

However, we also know that the total energy at the screen is the product of the number of maxima, peak intensity, and the width of a maximum:
Total Energy ∝ (number of maxima) × (peak intensity) × (width of maxima)

As the number and location of the maxima do not change, the peak intensity of the maxima increases proportionally to n²:
Total Energy ∝ n × n² × (width of maxima)

Now we can equate these two expressions:
n ∝ n³ × (width of maxima)

To solve for the width of the maxima, we can divide both sides by n³:
1/n² ∝ width of maxima

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The net force between force A and force B is 2000 N in the direction of B.

If A and B are acting in opposite directions, we can find the net force by taking the difference between the magnitudes of the forces as shown below;

In this case, since B is the larger force, we can assign the direction of the net force to be in the direction of B.

The net force of the two forces is calculated as follows;

Net force = B - A

Net force = 5000 N - 3000 N

Net force = 2000 N

Therefore, according to Newton's second law of motion, the direction of the net force of the two forces will be in the larger force which is 5000 N, with a magnitude of 2000 N.

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The complete question is below:

What is net force between A and B  if they are acting in opposite direction to each other?

A = 3000 N

B = 5000 N