it is assumed that the density of water is 1000 kg/m3. if the specific gravity of mercury is 13.6, what is the density of mercury? multiple choice question. 0.00136 kg/m3 13.6 kg/m3 1360 kg/m3 1.36 kg/m3 13600 kg/m3

Since the problem's charge is negative and the force pushing it upward is upward, the electric field must be downward.

Magnitude: The equation for the relationship between an electric charge's force and the strength of the electric field is where The force is F. The charge is q. The electric field intensity is E. This issue is that we have.  The charge is q = 0.05 C. The force applied to the charge is F = 2 N. We determine the electric field's magnitude by resolving the E formula: An electric field's direction corresponds to the force that would be applied to a positive charge submerged in the field. The electric field and the electric force are therefore in opposite directions for a negative charge.

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The exact composition of a solution with a mole fraction of 0.4 alcohol can be determined by mixing specific amounts of alcohol and the other component (assumed to be water or another solvent) in a given volume. The actual amounts would depend on the desired volume of the solution and the molecular weights of both components.

To calculate the amount of each component, the mole fraction of alcohol can be multiplied by the total number of moles in the solution, which can be obtained by dividing the solution's volume by the molar volume of the mixture. Mole fraction is a measure of the relative amount of a particular component in a mixture of substances. It is defined as the ratio of the number of moles of one component to the total number of moles of all components in a mixture. The mole fraction of a component is often represented by the symbol "x" followed by the subscript of the component.

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which of the following results in a solution where the mole fraction of alcohol is 0.4? what is mole fraction and how can we determine it?

Since the cue ball is at rest after the collision, the eight ball must be moving at a velocity that is equal to the velocity of the cue ball before collision. This is based on conservation of momentum.

Momentum in physics is defined to be the velocity v times the mass m of an object (p = m · v). When a stationary object moves after a force acting on it, it gains momentum.

According to the conservation of momentum, the momentum in a closed system (meaning there is no external forces acting on the system) must be constant over time since it is conserved. This is why the momentum before collision is equal to that after collision (p = p').

When the cue ball is at rest after a collision with the eight ball, the eight ball must then be moving at the same velocity as the velocity of the cue ball before the collision.

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The period of the wave is 9 seconds.

Wavelength is a term used to describe the distance between two consecutive peaks (or troughs) of a wave. It is a measure of the spatial extent of a wave and is a key characteristic that defines the type of wave.

In physics, waves can be classified as transverse waves (such as light and radio waves) or longitudinal waves (such as sound waves). The wavelength of a wave is the distance between two consecutive points of the same phase, such as two peaks or two troughs, along the direction of wave propagation. The wavelength can be expressed in units of length, such as meters or centimeters.

In many applications, such as in light or sound waves, wavelength is an important factor in determining the properties of the wave. For example, the wavelength of light determines its color, with longer wavelengths appearing as red and shorter wavelengths appearing as blue or violet. In sound waves, the wavelength determines the pitch, with longer wavelengths corresponding to lower-pitched sounds and shorter wavelengths corresponding to higher-pitched sounds.

In electromagnetic waves, the wavelength is inversely proportional to the frequency of the wave, meaning that as the frequency increases, the wavelength decreases. This relationship is described by the wave equation, which relates the speed, wavelength, and frequency of a wave.

Understanding the concept of wavelength is crucial in many areas of science and engineering, including optics, telecommunications, and audio engineering, among others.

The period of a wave is the time it takes for one complete wave cycle to pass a fixed point.

Period = Wavelength / Wave Speed

In this case, the wavelength is 45 m/wave and the speed is 5 m/s, so substituting these values into the formula:

Period = 45 m / 5 m/s

Period = 9 s

Therefore, the period of the wave is 9 seconds.

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We must utilize vector addition of the three applied forces to calculate the angle "a" for which the horizontal component of the resulting force is zero. Let's name the three forces' magnitudes.

F1, F2, and F3. The following equations can be used to express the three forces in their components along the x-axis (horizontal) and y-axis (vertical): F1x = F1 * sinF1y = sin * F1-F2 * cos F2x = -F2 * cos F2y = sin * F2 F3x = 0 (because the force F3 is acting vertically upward and has no horizontal component) F3y = F3 The resulting force's x-component (Rx) equals the sum of the separate forces' x-components: Rx = F1x + F2x + F3x = F1 cos(a) - F2 cos(a) And the resulting force's y-component. We must utilize vector addition of the three applied forces to calculate the angle "a" for which the horizontal component of the resulting force is zero. Let's name the three forces' magnitudes.

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The correct option is (C) i.e. melting and evaporation, which result in an increase in the motion and kinetic energy of particles.

In melting, the particles absorb heat energy, causing their motion and kinetic energy to increase. Similarly, in evaporation, the particles at the surface of a liquid absorb heat energy, causing them to break free from the rest of the liquid and become a gas. This results in an increase in the motion and kinetic energy of the particles. Condensation and freezing, on the other hand, result in a decrease in the motion and kinetic energy of particles as the particles release heat energy and slow down. Evaporation is the process by which a liquid turns into a gas. It occurs when the particles at the surface of the liquid absorb heat energy and gain enough kinetic energy to escape the attractive forces of the other particles in the liquid. These high-energy particles then become a gas and form a vapor above the surface of the liquid.

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The reaction force to the force of gravity on a capsule is called the normal force. It acts in the upward direction and has an equal magnitude but opposite direction to the gravitational force. The 3rd law notation is:

The magnitude of the normal force is equal to the weight of the object, m * g, and the direction is opposite to the direction of the gravitational force.

The normal force is an example of Newton's 3rd law of motion, which states that for every action, there is an equal and opposite reaction. In this case, the action is the force of gravity pulling down on the capsule, and the reaction is the normal force pushing up on the capsule.

The normal force arises due to the fact that the capsule is in contact with a supporting surface, and it prevents the capsule from falling through the surface. The normal force acts perpendicular to the surface and its magnitude depends on the weight of the object and the surface it is resting on.

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A student intends to demonstrate sound reflection to her classmates using a model. The wave tank model is the best model to represent what occurs when sound waves are reflected.

A "ripple tank" is a shallow tank of water with a source of waves at one end, and a barrier that can be adjusted to cause reflection of the waves at the other end. This model shows the reflection of water waves, which are similar to sound waves, and the resulting interference patterns that can occur. By changing the height of the barrier, students can observe how the angle of incidence affects the angle of reflection, demonstrating the concept of sound reflection.

The ripple tank model provides a simple, visual demonstration that can help students understand the basic principles of wave behavior, including reflection, refraction, and diffraction.

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The distance between me and my friend is 12.1 m

The distance of the friend towards east = 6.9 m

The distance of the friend towards the south = 9.8 m

The distance between me and my friend can be found using the Pythagoras theorem,

First, let us find the angle made by my friend with me

               tanθ = O/A

where O is the distance of the friend towards the south

           A is the distance of the friend towards the east

Let us substitute the known values,

                 tanθ = 9.8 / 6.9

                 tanθ = 1.4

                       θ =  tan⁻¹(1.4)

                       θ = 55°

Then the distance between me and my friend is

               sin θ = O/H

where H is the distance between me and my friend

               sin 55° = 9.8 / H

                   0.81 = 9.8 / H

                       H = 9.8 / 0.81

                           = 12.1 m

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Due to the fact that it is an electron acceptor that is blue when oxidized and colorless when reduced, DPIP is a redox dye that is frequently employed as a monitor of the light processes in photosynthesis.

NADP+ is frequently replaced with DPIP. Due to the chemical makeup of the dye, it changes hue when it is reduced. In order to track tPMET, DPIP is also used as an extracellular electron acceptor. In our DCPIP reduction experiment, electrons transfer to DCPIP rather than cytochrome b6f from the intramembrane plastoquinone pool. The colourless, reduced form of DCPIP is created as the oxidised, blue form receives the electrons. Chloroplasts oxidise water and send the resultant electrons to the synthetic electron acceptor, dichlorophenol, via the photosynthetic electron transport chains in their thylakoid membranes.

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The electric field (as a vector) at a distance z along the z-axis

[tex]E = \frac{1}{4 \pi ε0} \frac{ 2 \pi r dr }{1} \frac{1}{\sqrt{a^{2} + z^{2} } } -\frac{1}{b^{2} + z^{2} }[/tex]

We take a small circular element on the ring with the radius 'dr' ,  It is given that the ring is uniformly charged  with charge density ∝  

so the total charge in the small ring with thickness dr is

[tex]d_{q}[/tex]  = [tex]2[/tex]   [tex]\pi[/tex] [tex]r \ d_{r}[/tex]

We know that the electric field at point 'z '  units away on the line passing through the centre of the ring is

[tex]E = \frac{1}{4 \pi ε0} \frac{ 2 \pi r dr }{\sqrt[\frac{3}{2} ]{ r^{2} + z^{2} } }[/tex]

The inner radius is ' a'  The outer radius is 'b'

Integrating the above equation from a to b

[tex]E = \frac{1}{4 \pi ε0} \frac{ 2 \pi r dr }{1} \frac{1}{\sqrt{a^{2} + z^{2} } } -\frac{1}{b^{2} + z^{2} }[/tex]          

If limit 'a' goes to zero

[tex]E = \frac{1}{4 \pi ε0} \frac{ 2 \pi r dr }{1} ( \frac{1}{ } -\frac{1}{b^{2} + z^{2} })[/tex]

Using Binomial expansion and ignoring terms of higher power

[tex]E = \frac{1}{4 \pi ε0} \pi ∝ b^{2}[/tex]

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The buoyant force on block B will be greater than the buoyant force on block A at the instant they are released from the center of the tank.

This is because block B has a greater density than block A, which means it has a greater mass and thus a greater buoyant force. The greater the mass of an object, the greater the buoyant force it experiences. However, according to the Archimedes principle, the buoyant force is really the weight of the fluid displaced. Therefore, the weight of the liquid that has been displaced by a floating object is equal to the weight of the object. Therefore, the buoyant force acting on an object only equals the object's weight in the particular case of floating.

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A flat piece of paper has a mass of 5 grams. When the paper is crumpled into a ball, the mass of the crumpled paper is the same as the flat paper.

Sir Isaac Newton was the first to discover mass via study of the gravitational and inertial characteristics of objects. Newton was an English natural philosopher, physicist, mathematician, chemist, astronomer, and theologian.

A substance or object's mass can be thought of as a measurement of the number of particles it contains. One of the key metrics for determining an object's size and inertia is mass. A flat sheet of paper weighs 5 grams. The mass of the crumpled paper is equal to the mass of the flat paper when it is rolled into a ball.

A mass value becomes an inherent attribute of an object, therefore it is constant regardless of the location of the object. Mass is categorized as a scalar quantity if the basis for the classification is how the object affects the direction of motion (only has value).

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Because some stars are closer to our planet than others, they appear to be larger because the Earth receives less light from the closest stars that it does from the distant ones.

What material do stars have?

Large celestial bodies known as stars are primarily composed of helium and hydrogen and generate light and heat in their centers from churning nuclear forges. The other stars we can see in the skies are all gentle away from Earth, excluding our sun. They serve as the foundation for the universe's billions of galaxies.

A star is what?

There are now lines. An astronomical object known as a star is made up of a luminescent plasma spheroid that is held together by the object's own gravity. Earth's closest star is

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The possible sums are: 2, 3, 4, 5, 6, 7, 8, 9, 10, and 11. So there are 10 possible values for x.

The number of ways to choose 2 balls from 5 balls is 5 choose 2, which can be calculated as 5! / (2! (5-2)!). This can also be written as 5C2. The result is 10. Hence, there are 10 possible sums that can be obtained by choosing 2 balls out of 5 balls numbered 1, 2, 3, 4, and 5.

Therefore, the possible sums are: 2, 3, 4, 5, 6, 7, 8, 9, 10, and 11. So for x, there are 10 possible values.

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The angular speed of the ride is 0.533π rad/s.

The speed of an object, which is a scalar quantity in everyday usage and kinematics, is the size of the change in that object's position over time or the size of the change in that object's position per unit of time.

Given that, to complete one rotation the ride takes 3.75 sec.

The angle traversed in one revolution is 2π.

In physics, the rotational velocity or angular velocity also referred to as the angular frequency vector, is a pseudovector that illustrates how quickly an object's angular position or orientation changes over time.

The formula of angular speed is  ω = θ /t

Here  θ = 2π and  t = 3.75

The angular speed is

ω = 2π/3.75

ω = 0.533π rad/s

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The frequency of the standing wave with three loops (three antinodes) is approximately 3.2 Hz.

Frequency is a measure of the number of cycles of a periodic wave that occur in a unit of time. It is usually expressed in hertz (Hz), which is the number of cycles per second.

The frequency of a wave determines its pitch, with higher frequencies producing higher pitches and lower frequencies producing lower pitches. In physics, frequency is an important concept in areas such as mechanics, electromagnetism, and quantum mechanics.

The frequency of a standing wave in a stretched spring can be determined using the equation:

f = (1 / 2L) * √(T / μ)

where:

L = length of the spring

T = tension in the spring

μ = linear mass density of the spring (mass per unit length)

First, we need to calculate the linear mass density of the spring, which is given by:

μ = mass/length

mass = 276 g = 0.276 kg

length = 5.42 m

μ = 0.276 kg / 5.42 m = 0.051 kg/m

Next, we can plug the values into the frequency equation:

f = (1 / 2 * 5.42 m) * √(10.6 N / 0.051 kg/m)

f = √(10.6 N / 0.051 kg/m) / 2.71 m

f ≈ 3.2 Hz

Therefore, the frequency of the standing wave with three loops (three antinodes) is approximately 3.2 Hz.

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Electrostatic force on a -2.0 μC charge in a uniform electric field given by E = (100 N/C) x^r will be -2.0 x 10^-4 N in the direction opposite to x^r.

Electrostatic force is an attractive as well as repulsive force caused by electric charge particles and it is also known as Coulomb's force.

The magnitude of the electrostatic force on a charge q in an electric field E is given by the formula F = qE. Plugging in the values q = -2.0 μC = -2.0 x 10^-6 C and E = 100 N/C, we get:

F = qE = (-2.0 x 10^-6 C)(100 N/C) = -2.0 x 10^-4 N

Direction of the force is opposite to the direction of electric field. So, the electrostatic force on a -2.0 μC charge in a uniform electric field given by E = (100 N/C) x^r will be -2.0 x 10^-4 N in the direction opposite to x^r.

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The speed of a ball that is thrown upward into the air, neglecting air resistance, changes over time due to the force of gravity. The ball's velocity decreases as it rises, reaches zero at the peak of its trajectory, and then increases as it falls back towards the ground.

The motion of an object under the influence of gravity can be described by the laws of physics. When a ball is thrown upward into the air, it initially moves with a certain velocity. However, as the ball rises, its velocity changes due to the force of gravity acting on it. In this answer, we will neglect the effect of air resistance and focus solely on the effect of gravity.

When a ball is thrown upward, it has an initial velocity, which is equal to the magnitude of the velocity with which it was thrown. This velocity is positive, meaning that it points in the upward direction. However, as the ball rises, it is slowed down by the force of gravity, which acts in the downward direction. As a result, the velocity of the ball decreases over time.

The acceleration due to gravity, g, is a constant 9.8 m/s^2, and it acts in the downward direction. The equation for velocity, v, as a function of time, t, can be expressed as v = v0 - gt, where v0 is the initial velocity. This equation shows that the velocity of the ball decreases linearly with time as it rises into the air.

At the peak of its trajectory, the ball has zero velocity. This means that it is momentarily at rest, and from this point on, it begins to fall back towards the ground. The velocity of the ball at this point is negative, meaning that it points in the downward direction. As the ball falls, its velocity increases due to the force of gravity, and it continues to increase until it reaches the ground.

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The boiling point of ethanol is still higher due to the presence of hydrogen bonds.

The compound with the highest boiling point would be ethanol (C2H5OH). The boiling point of a compound is determined by the strength of intermolecular forces, and ethanol has a relatively high boiling point due to its ability to form hydrogen bonds. In comparison, oxygen (O2) and ethane (C2H6) have weaker intermolecular forces and therefore lower boiling points. Chloroethane (C2H5Cl) has a slightly higher boiling point than ethane due to its polar nature, which allows it to participate in dipole-dipole interactions. However, the boiling point of ethanol is still higher due to the presence of hydrogen bonds.

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The mass of KBr that you need to prepare 100 ml of a 1.5 M KBr solution is 17.23 grams.

To prepare 100 ml of a 1.5 M KBr solution, the first thing you need to do is to determine the amount of KBr in moles required for the desired concentration. Use the following formula to do that:

  Molarity = moles of solute / liters of solution

In this case, the desired concentration is 1.5 M, while the volume of the concentration is 100 ml or 0.1 liters.

  1.5 M = moles of solute / 0.1 liters
moles = 1.5 M x 0.1 = 0.15 moles

After that, convert the number of moles to mass using the molecular mass of KBr. KBr has a molecular mass of 114.91 g/mol. Therefore, the mass required to make a 100 ml solution of a 1.5 M KBr is:

  0.15 moles * 114.91 g/mol
= 17.23 grams.

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Consider an object of mass m falling through the air with a starting velocity of V0, suffering air resistance proportional to its velocity with a constant proportionality k.

The object's equation of motion is as follows: dv/dt = kv - 9.8 (a) The method of integrating factors can be used to calculate the velocity of an object as a function of time. u(t) = e gives the integrating factor (kt) When both sides of the equation of motion are multiplied by u(t), we get: u(t)dv/dt = ku(t)v - 9.8u (t) v(t) = (V0 + 9.8/k)e(-kt) - 9.8/k)e(-kt)e(-kt)e(-kt)e(-kt)e(-kt)e(-k (b) To get the velocity limit as t approaches infinity, evaluate the expression for v(t) as t approaches infinite: lim(t->inf) lim(t->inf) v(t) (V0 + 9.8/k)e^(-kt) (-kt) - 9.8/k = -9.8/k meaning that as time passes, the velocity approaches a constant terminal velocity, which is given by the proportionality constant k and the acceleration due to gravity. (c) We may determine the position function s by integrating the velocity function v(t) with respect to time ds/dt = v (t).

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The centripetal acceleration remains the same when the radius of the circle is reduced by half.

Hence, option (a) is the correct choice.

Acceleration perpendicular to the object's velocity and pointing towards the centre of a curving route. Along a circular track, causes an item to shift direction but not speed. Also known as radial acceleration.

The attribute of motion of an item travelling a circular path is characterised as centripetal acceleration.

Centripetal acceleration is defined as any item travelling in a circle with an acceleration vector pointing towards the centre of that circle.

When you spin a ball on a thread over your head, it experiences centripetal acceleration. When you travel in a circle, your automobile experiences centripetal acceleration. A spacecraft in orbit around the Earth likewise experiences centripetal acceleration.

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The complete options may be:

(a) The centripetal acceleration remains the same.

(b) The centripetal acceleration is halved.

The correct answer is d) The anode is the cobalt electrode and the cell potential is +0.39 V. In a standard lead-cobalt cell, the anode is the cobalt electrode and the cell potential is +0.39 V.

This is because the cobalt electrode has a higher reduction potential than the lead electrode, meaning that electrons will flow from the cobalt to the lead electrode. The cell potential is the difference in the reduction potentials of the two electrodes, and since the cobalt electrode has a higher reduction potential, the cell potential is positive. The cell potential is measured in volts, and in this case it is +0.39 V.

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It will be 691.666 miles north of the equator, if started at the equator and travel to 10° N.

For the stated question:

We cover 24900 miles in order to complete 360 degrees.

Thus, for  10° = 24900*10 / 360

= 691.66 miles.

Thus, it will be 691.666 miles north of the equator.

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A) The gain in gravitational potential energy 0.374 Joules B) The drop in the pressure is 3.743 kN/m².

Volume of the blood, V = 100 ml = 1 × 10⁻⁴ m³

Acceleration due to gravity, g = 9.81 m/s²

Density of blood, ρ = 1060 kg/m³

Increase in the vertical position, Δh = 36 cm = 0.36 m

Gain in gravitational potential energy, ΔP.E = mgΔh

ΔP.E = (ρ×V)gΔh

ΔP.E = 1060 × 1 × 10⁻⁴ × 9.81 × 0.36

ΔP.E = 0.374 J

B) Drop in pressure, Δp = ρgΔh

Δp = 1060 × 9.81 × 0.36

Δp = 3743.5 N or 3.743 kN/m²

C) Gravitational potential energy increases with the increase in elevation of the object, where as pressure decreases with the increase in the elevation of the object. We know gain in potential energy,

ΔP.E = mgΔh = ρVgΔh

Drop in pressure, Δp = ρgΔh

ΔP.E = ΔpV

Here V is the volume of the blood.

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The correct option is (d) i.e. planets dimmer than stars, is not a general difference between a planet and a star.

It is not accurate to say that "planets are dimmer than stars." While it is true that many planets do emit much less light than stars, it is not a universal rule. Some planets can actually reflect more light from their parent star and appear brighter than their host star in the night sky. Additionally, the brightness of a planet and a star can depend on many factors such as their distance from us, size, atmospheric conditions, and more. To compare the brightness of a planet and a star, it is better to look at their relative brightness at a specific distance and in a specific band of the light spectrum.

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Unable to ascertain. Without a figure, it is impossible to provide precise answers to any queries on the movements of the two automobiles. Please submit the data or offer further details. momentarily

Momentarily refers to a brief length of time or an instant. It is frequently used to denote a brief break or halt in a process or occurrence. For instance, a person may say "let me pause briefly to regain my breath" to describe taking a brief break or "I'll be there shortly" to imply that they would come soon. In a more general meaning, the phrase can also apply to anything occurring or lasting just briefly, as in "the cloud momentarily blocked the light." The phrase generally suggests something fleeting and transient determined At which of the lettered

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Answer:red

Explanation:red

you would see a reddish color if you look through rose-colored glasses.

Rose-colored glasses are a popular phrase that refers to a nostalgic or optimistic view of the world, but it can also refer to actual glasses with pink-tinted lenses. When looking through these glasses, the world appears to have a reddish hue due to the color of the lenses.

The tint of the lenses selectively filters out certain wavelengths of light, allowing only the red portion of the visible spectrum to reach the eye. This creates an illusion of a world with a reddish tint, as all colors are seen through the lens with a reddish hue.

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The sign of the potential energy of the system of a negatively charged object and a positively charged object is negative, as opposite charges have an attractive interaction and energy is required to separate them.

To decrease the energy, you can bring the charges closer together, reducing the distance between them. This increases their attractive interaction, releasing energy.

The energy bar chart for the process of decreasing the energy would show the potential energy decreasing as the distance between the charges decreases. The energy released as the charges are brought closer together is shown as a decrease in the potential energy.

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