A dragster is travelling east when the parachute opens and slows the dragster for 4.5 seconds at a rate of 10 m/s2 west. What was the dragster's change in velocity due to the parachute?​

The total work done on a particle is given by the formula:

W = (1/2)mvf^2 - (1/2)mvi^2

where m is the mass of the particle, vi is the initial velocity, and vf is the final velocity.

For vi = 5 m/s and vf = 2 m/s, the final velocity is less than the initial velocity, so the total work is positive.

For vi = -2 m/s and vf = -5 m/s, the final velocity is less than the initial velocity, so the total work is positive.

For vi = -5 m/s and vf = 2 m/s, the final velocity is greater than the initial velocity, so the total work is negative.

For vi = 5 m/s and vf = -2 m/s, the final velocity is greater than the initial velocity, so the total work is negative.

For vi = -5 m/s and vf = -2 m/s, the final velocity is less than the initial velocity, so the total work is positive.

Therefore, the total work done on the particle is positive for vi = 5 m/s and vf = 2 m/s, and for vi = -2 m/s and vf = -5 m/s.

In order for work to be done, there must be a displacement of the object in the direction of the force applied. If the force and displacement are perpendicular, then no work is done.

Work can be positive, negative, or zero, depending on the direction of the force and the displacement. Positive work is done when the force and the displacement are in the same direction, negative work is done when they are in opposite directions, and zero work is done when there is no displacement or when the force and displacement are perpendicular.

Work is a transfer of energy, and as such it can change the kinetic energy, potential energy, or both of an object.

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Explanation:

The work of friction will be   Fn * .8 x d

Fn = ( m1 + m2) g = ( 980+2500 kg) (9.81) = 34139 N

Work f friction = Ffriction x d

                           = 34139 N  * .8 x 2.7 m = 73740 J

this equals the sports car's KE

73740 J = 1/2 mv^2

73740 = 1/2 ( 980)(v^2 )        v = 12.3 m/s

The percent fuel efficiency of the car which has gasoline is about 14.8%.

Fuel efficiency of the vehicle or an engine measures the distance which a motor vehicle can travel on a single gallon of the gas or fuel. As a result of this, boosting the efficiency of these vehicles can also help them to limit the impact on the climate change.

Energy density of gasoline = 122.8 mega joules per gallon

Fuel economy of the car = 35 miles per gallon

Energy exerted per mile = 0.877 mega joules

Percent fuel efficiency = Energy output of car/ Energy input of car × 100

Where, Energy input of car = Energy density of gasoline × Number of gallons of gasoline used

Energy input of car = 122.8 mega joules/gallon × 1 gallon/ 35 miles × 1 mile/ 1.60934 kilometers× 1.60934 kilojoules/ mega joule

Energy input of car = 4.45 mega joules per kilometer

Energy output of car = Energy exerted per mile × Number of miles traveled

Energy output of car = 0.877 mega joules per mile × 35 miles

Energy output of car = 30.8 mega joules

Percent fuel efficiency = 30.8 mega joules/4.45 mega joules × 100

Percent fuel efficiency = 14.8%

Therefore, percent fuel efficiency of the car is 14.8%.

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The sections 2 and 4 of the track will the sled experience an unbalanced force which is frictionless surface.

As we see from the diagram the track is a frictionless surface where the sled will move. In section 1 and 3, the sled will experience a balanced force because the gravitational force pulling the sled down is equal to the normal force of the track pushing the sled up. While in section 2 and 4, however, the sled will experience an unbalanced force because the gravitational force pulling the sled down will be greater than the normal force of the track pushing the sled up. This will cause the sled to accelerate and move faster. Hence section 2 and 4 will experience an unbalanced force.

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The magnetic field at the center of the coil is 0.0014 T.

How to find the magnetic field at the center of the coil? The magnetic field formula is given by, B = μ_0 * n * I Where,

B is the magnetic field; μ_0 is the magnetic constant (4π × 10⁻⁷ T⋅m/A); n is the number of turns per unit length; I is the current; N is the total number of turns; n = N/L, where, L is the length of the wire

The length of the wire is given by, L = π * D = π * 4.50 × 10⁻² = 0.141 m

Thus, n = N/L = 400/0.141 = 2830 turns/m

Now, B = μ_0 * n * I = 4π × 10⁻⁷ × 2830 × 0.5 = 0.0014 T

Therefore, the magnetic field at the center of the coil is 0.0014 T.

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The coffee can must be placed at least 0.2 meters below the final horizontal position, which would be about 3.2 meters from the base of the table. This can be proved by taking both the horizontal and vertical components of motion.

We can use both the equations for horizontal and vertical motion. Since the ball is launched horizontally, only the horizontal equation is needed:

Horizontal Motion: xf = xi + vxt

where:
xf = final horizontal position
xi = initial horizontal position
vx = horizontal velocity
t = time elapsed

Since we know the initial horizontal position, the horizontal velocity, and the time elapsed, we can calculate the final horizontal position:

xf = 0 + 8.0 m/s × 2.5 s = 20 m

Now, the coffee can is 20 cm tall, which is equal to 0.2 m. The initial vertical position of the ball is 1.0 m. The final vertical position will be the same as the initial vertical position, since the ball is not subject to any vertical acceleration. Therefore, the coffee can must be placed 0.2 m below the final horizontal position, which would be 3.2 m from the base of the table.

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Of the three states of matter (solid, liquid, and gas), gas has the most kinetic energy. This is because the particles in a gas have the highest average speed compared to the particles in solids and liquids.

In a gas, the particles are in constant motion, colliding with each other and the walls of the container. This motion generates kinetic energy, which is proportional to the speed and mass of the particles. In contrast, solids have the lowest kinetic energy because their particles are tightly packed and have limited movement. The particles in a solid vibrate around a fixed position, and only experience small oscillations. Liquids have an intermediate amount of kinetic energy. The particles in a liquid are less tightly packed than in a solid, and can move more freely, resulting in more kinetic energy. However, liquids have more intermolecular forces between the particles compared to gases, which restricts their movement and reduces their average speed. Therefore, of the three states of matter, gases have the most kinetic energy, followed by liquids and then solids.

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Answer:

frequency

because more wavelength is covered in 1 second in the bottom one

The forces acting on the floor when a child twirls a 0.100 kg ball connected to a 1.0 m string in a horizontal circle along the floor with a speed of 2.0 m/s are: A. Only gravity force and tension.

These forces include the force due to gravity (weight) acting vertically downwards and the tension in the string acting horizontally.

The formula for centripetal acceleration is: a = v²/r

where - a is the centripetal acceleration

            - v is the velocity

            - r is the radius of the circle

The force of tension is the force that arises when an object is pulled or stretched by a rope or cable that is connected to it. In this case, the ball is connected to the string and the string is being pulled to maintain the circular motion. Therefore, the force of tension is present.

The force of gravity weight is the force exerted by the Earth's gravitational field on an object. It is calculated using the formula: W = mg

where - W is the weight of the object

            - m is the mass of the object  

            - g is the acceleration due to gravity (9.8 m/s²)Therefore, the force of gravity weight is also present in this scenario.
The normal force acts on the ball to balance the force due to gravity, but it acts perpendicular to the floor and does not directly affect it.

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Lions obtain carbon they need by eating the animals that have carbon-based molecules stored in their bodies.

When lions consume flesh of other animals, they break down organic molecules, such as carbohydrates, proteins, and fats, that are present in the animal's body. These organic molecules contain carbon atoms that are used by lion to build its own body and obtain energy.

Breathing in carbon dioxide from the atmosphere would not be a significant source of carbon for lions, as they do not have a mechanism to extract carbon from carbon dioxide. Similarly, absorbing carbon-based molecules through their skin from soil or drinking water that contains carbon dioxide would not be effective way for lions to obtain carbon, as these sources are not available in large enough quantities to support lion's needs.

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Answer:

Explanation:

by eating animals that have carbon-based molecules stored in their bodies.

hope this helps good day

Answer:

The mass of any amount of a solid, liquid, or gas relative to its volume is called density.

Answer: The mass of any amount of a solid, liquid, or gas relative to its volume is called density.

d) less massive than the Sun. A protostar that will eventually turn into a star like the Sun is formed from a cloud of gas and dust that collapses under its own gravity.

As it collapses, it heats up and becomes more luminous, but it is still much smaller and less massive than the Sun. Over time, the protostar will continue to contract and heat up until it reaches a point where the conditions in its core are sufficient to initiate nuclear fusion. A protostar that will eventually turn into a star like the Sun is formed from a cloud of gas and dust that collapses under its own gravity.  a protostar that will eventually turn into a star like the Sun is significantly  At this point, it will become a true star, but it will still be smaller and less massive than the Sun.

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Point-to-point encryption and end-to-end encryption are two distinct cryptographic approaches. Both these methods offer data security but in different ways.

The difference between point to point encryption and end-to-end encryption is as follows:

Point-to-point encryption

Point-to-point encryption (P2PE) protects payment card data from the time it is swiped to the point it is encrypted. It encrypts card data before it enters a merchant's system, keeping it secured until it is sent to the payment processor. The data is then decrypted and transmitted through the processing network to the card issuer for approval. P2PE prevents any attempts to intercept the card data while it's in motion from the terminal to the payment processor.

End-to-end encryption

End-to-end encryption (E2EE) involves encrypting data from the point of origin to its final destination. End-to-end encryption secures the entire data transmission process from client to server. It encrypts the data at the source, such that the data is protected throughout its journey. Therefore, end-to-end encryption is mainly used in messaging and communication apps like WA, etc.

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. Additionally, Star 1 has prominent hydrogen lines, indicating a lower temperature than Star 2. Therefore, the statements can be sorted into the true and false bins as indicated above.

True: Star 1 has a longer lifetime than Star 2; Star 2 is bluer than Star 1; Star 2 has a lower mass than Star 1; Star 1 has prominent hydrogen lines.

False: Star 2 has a higher luminosity than Star 1; Star 2 is cooler than Star 1.

The spectra of the two main sequence stars illustrate some differences between the two stars. Star 1 is on the left and has a longer lifetime than Star 2, which is on the right. This is evident from the intensity axes that are not on the same scale. Star 2 has a lower mass than Star 1, is bluer than Star 1, and has a lower luminosity

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The cyclist's power output to climb the same hill at the same speed, assuming a total mass of 80 kg (bicycle plus rider), is unidentified.

Here P denotes power, m denotes mass, g denotes acceleration due to gravity, h denotes height, and t denotes time taken.

Since we don't have any data on height or time, we'll use an alternative method that relies on work and speed instead.

The work required to climb the hill with a mass of 80 kg and the same speed is given by:

W = mgh

where W denotes work.

We'll suppose that the cyclist climbs the hill at a speed of v. We know that the work done to climb the hill is equal to the kinetic energy at the hill's peak.

When the cyclist is at the bottom of the hill, the kinetic energy is given by:

[tex]KE=\frac{1}{2}mv^2[/tex]

When the cyclist reaches the peak, the kinetic energy is zero, and the gravitational potential energy is given by

[tex]mgh=\frac{1}{2}mv^2[/tex]

where h is the height of the hill.

Now, let's rearrange the equation to solve for the power required

[tex]\frac{1}{2}mv^2=mgh\\h=\frac{v^2}{2g}}[/tex]

Substituting [tex]\sqrt{2gh}[/tex] in the equation for power, we have:

[tex]P=W/t\\P=\frac{mgh}{t}\\P=\frac{mg\frac{v^2}{2g}}{t}[/tex]

Here m is the total mass of the bicycle and rider, h is the height of the hill, g is the acceleration due to gravity, and t is the time taken.

Therefore it depends on both speed and height of the rider.

A centripetal force of 0.55 N is needed to keep the model plane orbiting in a 45m radius if it completes one orbit in 12s.

To find the centripetal force needed to keep a 2.5kg model plane orbiting in a 45m radius, we can use the formula:

F = (m × v²) / r

where F is the centripetal force, m is the mass of the plane, v is its velocity, and r is the radius of the orbit. We can find the velocity of the plane using the formula:

v = 2 × π × r / T

where T is the time it takes to complete one orbit. In this case, T = 12s, so we get:

v = 2 × π × 45m / 12s = 9.42 m/s

Substituting the values into the first formula, we get:

F = (2.5kg × (9.42m/s)²) / 45m = 0.55 N

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It is currently thought that moons typically do not form near (a) any planets of binary star systems.

Binary star systems are systems in which two stars orbit around a common center of mass. The function of binary star systems is to provide astronomers with a way to measure the properties of stars more accurately than can be done for single stars.

By observing binary star systems, astronomers can measure the masses, sizes, and luminosities of the stars involved. This information can be used to test theoretical models of stellar evolution and to gain insights into the physical processes that occur in stars.

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Both the initial amount and the kind of gas play a role.  However, the pressure and the quantity of gas present also have a role in this relationship.

Charles' Law states that a gas's volume is directly proportionate to its temperature. However, the pressure and the quantity of gas present also have a role in this relationship. Hence, we would need to know the starting volume, pressure, and number of moles of a gas sample in order to calculate its volume at 50.0 °C. The type of gas would also be a role in deciding its final volume at 50.0 °C because different gases behave differently at various temperatures.  Ideal gas perfectly obeys the gas law. Thus, the correct answer to the question is Ideal gas.

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The final speeds of the particles expressed in terms of the initial velocity are |v1'| = |v1| = 27/8|vi| and |v2'| = |v2| = 27/14|vi|

The conservation of momentum can be applied. The total momentum of the system before the collision is:

P before = m1v1 + m2v2

where m1 and v1 are the mass and velocity of the 4m block and m2 and v2 are the mass and velocity of the 7m block. Since the two blocks have the same initial speed, the momentum before the collision is:

P before = (4m)(-vi) + (7m)(vi)
P before = 3mvi

After the collision, the two blocks bounce back, so their final velocities are:

v1' = -v1
v2' = -v2

where v1 and v2 are the velocities of the blocks after the collision. Using the conservation of momentum again, the total momentum of the system after the collision is:

Pafter = m1v1' + m2v2'
Pafter = -4mv1 - 7mv2
Pafter = -4m(-v1) - 7m(-v2)
Pafter = 4mv1 + 7mv2

Since the collision is elastic, the total kinetic energy of the system is conserved. Therefore, the kinetic energy before the collision is equal to the kinetic energy after the collision:

Kbefore = Kafter

where Kbefore is the kinetic energy of the system before the collision and Kafter is the kinetic energy of the system after the collision. The kinetic energy can be expressed as:

K = 1/2mv²

Therefore, the total kinetic energy of the system before the collision is:

Kbefore = 1/2(4m)(vi)² + 1/2(7m)(vi)²
Kbefore = 27/2m(vi)²

The total kinetic energy of the system after the collision is:

Kafter = 1/2(4m)(-v1)² + 1/2(7m)(-v2)²
Kafter = 1/2(4m)(v1)² + 1/2(7m)(v2)²

Using the conservation of kinetic energy, Kbefore = Kafter:

27/2m(vi)² = 1/2(4m)(v1)² + 1/2(7m)(v2)²

Simplifying, the final velocities can be expressed in terms of the initial velocity:

v1 = 27/8vi
v2 = 27/14vi

Therefore, the final speeds of the particles are: |v1'| = |v1| = 27/8|vi| and |v2'| = |v2| = 27/14|vi|

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The total kinetic energy of the bowling ball of mass 7.2 kg and radius 10 cm rolling without slipping down a lane at 2.6 m/s  is 28.906 J.

We need to use the formula for the total kinetic energy of a rotating object, which is given by:

K = (1/2) Iω² + (1/2) mv²

where K is the total kinetic energy, I is the moment of inertia of the object, ω is the angular velocity of the object, m is the mass of the object, and v is the linear velocity of the object. Since the bowling ball is rolling without slipping, we can relate the linear velocity and the angular velocity as follows:

v = rω

where r is the radius of the bowling ball. Therefore, we can rewrite the formula for the total kinetic energy as:

K = (1/2) I (v/r)² + (1/2) mv²

Now, we need to find the moment of inertia of the bowling ball. The moment of inertia of a solid sphere about its diameter is given by:

I = (2/5) mr²

where r is the radius of the sphere and m is the mass of the sphere. Therefore, we can substitute the values given in the problem to get:

I = (2/5) (7.2 kg) (0.1 m)²
I = 0.0288 kg m²

Now, we can substitute all the values in the formula for the total kinetic energy to get:

K = (1/2) (0.0288 kg m²) (2.6 m/s)²/ (0.1 m)² + (1/2) (7.2 kg) (2.6 m/s)²
K = 3.9936 J + 24.912 J
K = 28.906 J

Therefore, the total kinetic energy of the bowling ball is 28.906 J.

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The acceleration of the cart at this instant is calculated to be 5.17 m/s² to the right.

Newton's second law explains that acceleration of any object is directly related to net force and inversely related to the mass.

To determine the acceleration of the cart, we need to calculate the net force acting on it.

The net force is the vector sum of the two forces:

Net force = Force a + Force b = 77 N to the right - 15 N to the left = 62 N to the right

Using Newton's second law, F = ma, where F is the net force and m is the mass of the cart, we can calculate the acceleration:

a = F/m = 62 N / 12 kg = 5.17 m/s

Therefore, the acceleration of the cart at this instant is 5.17 m/s² to the right.

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The sound level produced by a chorus of 34 such singers (all singing at the same intensity at approximately the same distance as the original singer) is 80.7 dB (rounded to one decimal place).

Sound intensity level or sound pressure level, measured in decibels (dB), is a logarithmic measure of the pressure of a sound relative to a reference value. The reference value used for sound intensity measurements is usually 10⁻¹² W/m². When the sound intensity doubles, the sound level increases by 3 dB.

Therefore, to calculate the sound level produced by a chorus of 34 such singers (all singing at the same intensity at approximately the same distance as the original singer), use the formula below.

L = 10 log (I/I₀) + 10 log (n)dB

where

Thus,

L = 10 log (I/I₀) + 10 log (n)dBL = 10 log (10⁻¹²/10⁻¹²) + 10 log (34) dB

L = 10 log (1) + 10 log (34) dBL = 0 + 15.1 dBL = 15.1 dB (rounded to one decimal place)

L = 62 + 15.1 dBL = 80.7 dB

Since the original sound level produced by one singer is 62 dB and the sound level produced by a chorus of 34 singers is 80.7 dB, the sound level produced by the chorus of 34 singers is 80.7 dB (rounded to one decimal place).

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If I move 3 m east and 4 m north, then my displacement would be 5m.

In geometry and mechanics, displacement is defined as a vector whose length is the shortest distance from initial to the final position of a point P undergoing the motion.

If an object moves relative to the reference frame—for example, if professor moves to the right relative to whiteboard or passenger moves toward the rear of airplane—then object's position changes. And this change in position is known as displacement.

Given AB= 3m east and BC= 4m north

AC= √ 3² + 4²= 25

So, AC, displacement = 5m

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Snell's Law, which states that the ratio of the indices of refraction of the two media is equal to the ratio of the sines of the angles of incidence and refraction, can be used to resolve this issue:

n1 sin - 1 = n2 sin - 2 where n1 is the initial medium's index of refraction (air) The second medium's index of refraction is given by n2 (water Angle of incidence = 1 Angle of refraction = 2 (what we want to find) With the values from the problem substituted, we obtain: 1.00 sin 34° = 1.33 sin θ₂ Solving for 2 gives us: 1.00 sin 34° / 1.33 25.9° = 2 = sin In light of this, the angle of refraction is roughly 25.9°. According to Snell's law, the angle of refraction of a light ray moving from air (n=1.0) into water (n=1.33) at an angle of incidence of 34° is roughly 23.8°.

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The slope (θc) at the free end is 0.0073 radians and the deflection (Vc) at the free end is 0.0050 meters.

The slope (θc) at the free end of the cantilever beam and loading shown can be determined using superposition. The flexural rigidity (EI) of the beam is assumed to be constant.

Using superposition, the slope (θc) at the free end can be calculated by taking the sum of the individual slopes resulting from the two loadings:

θc = θPL + θR

The individual slopes for each loading are:

θPL = PL/EI and θR = R/2L

Substituting these into the equation above gives:

θc = (PL/EI) + (R/2L)

The deflection (Vc) at the free end can be determined similarly, by taking the sum of the individual deflections resulting from the two loadings:

Vc = VPL + VR

The individual deflections for each loading are:

VPL = PL2/(2EI) and VR = R2/(2L)

Substituting these into the equation above gives:

Vc = (PL2/(2EI)) + (R2/(2L))

Therefore, the slope (θc) at the free end is 0.0073 radians and the deflection (Vc) at the free end is 0.0050 meters.

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The potential due to a ring of charge at a point on the z-axis a distance z away from the center of the ring is given by the equation:

Vring = kQ / √(R^2 + z^2)

where k is Coulomb's constant, Q is the charge on the ring, R is the radius of the ring, and z is the distance from the center of the ring to the observation point.

If the ring behaves like a point particle of charge Q at the origin, the potential at the same observation point on the z-axis would be:

Vparticle = kQ / z

To find the distance z where these two potentials agree to within 5%, we can set up the following equation:

|Vring - Vparticle| / Vparticle ≤ 0.05

Substituting the expressions for Vring and Vparticle and simplifying, we get:

|√(R^2 + z^2) - z| / z ≤ 0.05

Squaring both sides and rearranging, we get:

(R^2 / z^2) ≤ 0.0025

Taking the square root of both sides, we get:

R / z ≤ 0.05

Solving for z, we get:

z ≥ R / 0.05

Therefore, the observation point on the +z axis must be at a distance z of at least R / 0.05 from the center of the ring, where R is the radius of the ring, for the ring to behave like a point particle of charge Q at the origin to within 5%.

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According to NASA, the sun makes up approximately 99.86% of the mass of the solar system. Most of the mass in the solar system is concentrated in the sun.

The majority of the mass in the solar system is located in the Sun. Although the planets contain a significant amount of mass, the Sun accounts for over 99% of the solar system's entire mass. The planets, moons, asteroids, and other bodies in the solar system are insignificant in comparison to the Sun.

The sun contributes 99.86 percent of the total mass of the solar system. The source of this information is the NASA website.According to NASA, the Sun makes up 99.86 percent of the entire mass of the solar system. The rest of the 0.14 percent is split up between all of the planets, dwarf planets, asteroids, comets, and other celestial bodies in the solar system. Hence, we can say that the sun is the main contributor to the total mass of the solar system.

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As a charged helium balloon moves upward, the electrical potential decreases and the balloon's electrical potential energy decreases. The correct option is D.

Electrical potential is the potential energy difference between two charges at a certain distance from one another. Electrical potential is calculated using the formula for electric potential energy, which is determined by the distance between two charges and the magnitude of the charges.

Electrical potential energy is the potential energy stored between two charged particles separated by a distance. Electrical potential energy is calculated using the formula U=kQ1Q2/r, where k is Coulomb's constant, Q1 and Q2 are the charges, and r is the distance between the two charged particles. The SI unit of electric potential energy is joules (J).

Now coming back to the main question, if you charge a helium balloon on your hair and then release it, as the balloon moves upward the electrical potential and the balloon's electrical potential energy decreases, decreases. Hence, option D, decreases, decreases is the correct answer.

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