What must happen for electricity to be useful in your home?

The balloon initially rises in air because the weight of the displaced air i.e. the weight of the helium and the balloon is less than the upthrust. The balloon comes to a stop at a specific height because the density of air decreases with height.

A balloon's walls are put under pressure when it is inflated because the air inside the balloon expands. The balloon's size consequently grows.

A balloon that has been filled with helium gas can float in the air for around six hours. This is referred to as helium gas inflation. A balloon can be inflated with regular air using a balloon pump or an electric pump, but the balloon will not float.

Bubble balloons and foil balloons can last days, weeks or even months. They last far longer than latex balloons because helium progressively leaks out of latex balloons since they are porous.

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The magnitude and direction of the electric field generated by a 13 μC charge in a point 8.9 cm away from the chargeis 1.48x10⁷ N/C, directed away from the charge.

The electric force per unit charge is referred to as the electric field. It is assumed that the field's direction corresponds to the force it would apply to a positive test charge. From a positive point charge, the electric field radiates outward, and from a negative point charge, it radiates in.

E = (9 * 10^9)(13 * 10^-6) / (8.9^2) = 1.48 * 10^7

What direction does an electron's electric field follow?

The force that would be acting on a positive charge would be pointed in that direction by the electric field. Due to its negative charge, an electron will flow in the opposite direction of the electric field. As a result, it will migrate to the left.

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Option B. Positive. The sign of acceleration depends on the direction of the change in velocity. If the speed of the toy car is decreasing, then its velocity is decreasing, which means that its acceleration is negative.

The sign of acceleration depends on the direction of the change in velocity. If the velocity is increasing, the acceleration is positive. If the velocity is decreasing, the acceleration is negative. If the velocity is staying the same, the acceleration is zero. To determine the exact sign of acceleration, more information is needed, such as the direction and magnitude of the change in velocity over time. The change in velocity, also known as the delta velocity, is defined as the difference between the final velocity and the initial velocity. The change in velocity can be positive if the final velocity is greater than the initial velocity, negative if the final velocity is less than the initial velocity, or zero if the velocity is constant. The change in velocity can be used to calculate the acceleration, using the equation: acceleration = change in velocity / time.

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After the block is released from x = A, it will move to the left until it reaches x = -A and then begin to move to the right. This motion will continue back and forth until the block comes to rest due to frictional forces or other damping mechanisms.

This refers to a block that is initially released from a position x = A and is subject to a restoring force. The restoring force is proportional to the displacement from the equilibrium position and acts in the opposite direction. When the block is released from x = A, it will experience a net force towards the left and will start moving to the left until it reaches the equilibrium position x = -A. At this point, the net force acting on the block will be zero and it will come to rest. But as the block is displaced slightly to the left or right of the equilibrium position, it will experience a net force in the opposite direction and start moving back towards x = -A. This motion will continue back and forth until the block comes to rest due to frictional forces or other damping mechanisms.

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Speed describes how fast an object moves. Speed is described by and time. Velocity is speed .Velocity is described by and time.

Once you have the masses of both nuclei, you can compare them or perform any other operations you need to with their masses.

relation between the atomic mass and nucleus ?

The atomic mass of a nucleus is equal to the sum of the masses of its protons and neutrons. To calculate the mass of a nucleus, you can use the following formula:

mass of nucleus = number of protons * mass of proton + number of neutrons * mass of neutron

For the 2010Ne nucleus, you would need to find the number of protons and neutrons in a 2010Ne atom, then use the above formula to find its mass.

Similarly, for the 4020Ca nucleus, you would need to find the number of protons and neutrons in a 4020Ca atom, then use the above formula to find its mass.

Once you have the masses of both nuclei, you can compare them or perform any other operations you need to with their masses.

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The Brinell hardness number is calculated by the following formula Tensile Strength = 2272.3 x 7.86 = 17,982.3 N/mm²  .

The strength of an individual or a group of people is the inner capacity to achieve a desired result. It is the ability to push through difficult times and stay focused on a goal. Strength can be physical, mental, emotional, or spiritual. A strong individual is resilient, determined, and has a positive attitude. Strength may come from within, from external sources such as friends and family, or from a combination of both. It can be developed through practice and determined effort. Strength can be used in many areas of life such as problem solving, creativity, and perseverance. It can also help with dealing with stress, anxiety, and depression.

The Brinell hardness number is calculated by the following formula:

BHN = 2P/πD²

Where:

P = Load in kg

D = Diameter of indentation in mm

BHN = 2(3000)/π(3.1)² = 2272.3

The tensile strength of the steel is then estimated by the following formula:

Tensile Strength = BHN x 7.86

Tensile Strength = 2272.3 x 7.86 = 17,982.3 N/mm²  

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By using the equation of motion, the distance of elevator move while accelerating with full speed would be 20.51 m

The third equation of motion is written as follows: v2 - u2 = 2as. In physics, an equation of motion is defined as a mathematical expression that describes the behavior of a physical system in terms of how it changes over the course of time. Utilizing any one of the three equations of motion, it is feasible to compute values for variables such as velocity (both starting and end), displacement(s), time(t), and acceleration (a).

During the phase of acceleration, the elevator will travel a distance that may be calculated as follows:

v² – u² = 2as

Where:

v = the final speed

u = initial speed

a = acceleration

s = displacement

In this case, we are given that:

The elevator’s maximum speed (v) = 5.87 m/s

Initial speed, u = 0

The magnitude of acceleration (a) = 0.84 m/s²

Thus, the elevator moves at a maximum distance of:

s = (v²-u²)/2a

s = ((5.87m/s)² – (0)²) / (2 x 0.84 m/s²)

s = 20.51 m

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The presence of a polar covalent bond show that the electronegativities of the two atoms are not equal.

What does polar covalent bond means?

A polar covalent bond is a type of chemical bond between two atoms in which the electrons are unequally shared between the two atoms, resulting in a molecule with an electric dipole moment. The atoms in a polar covalent bond have different electronegativities and the electron cloud is distorted, creating a partial positive charge on one atom and a partial negative charge on the other.

The presence of a polar covalent bond indicates that the two atoms have different electronegativities. One atom will have a higher electronegativity than the other, meaning that the electron pair is pulled more towards it and forms a slightly negative charge. The other atom will have a lower electronegativity, resulting in a slightly positive charge.

Therefore, it show that the electronegativities of the two atoms are not equal.

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The strings on a musical instrument are 0.500 m in length and have a linear mass density of 1.17×10−3kg/m. the second harmonic on this string has a frequency 512 Hz, thus the tension in the string is T = 76.7 N

The wavelength of the sound wave that the string produces in the air is λ   = 1.344 m

[tex]\(d = 1.17 \times 10^{-3} \, \text{kg/m}\)[/tex]

f₂ = 512Hz

l = 0.500m

λ = l 0.500m

so,

[tex]\(v = \sqrt{\frac{T}{d}}\)[/tex]

[tex]\[T = \left(\frac{512 \times 0.5 \, \text{m}}{2}\right)^2 \times (1.17 \times 10^{-3} \, \text{kg/m})\][/tex]

Therefore, the tension in the string is T = 76.7 N

2. f₁ = 256 Hz (fundamental frequency)

v = 344 m/s

Thus,

[tex]\[λ_1 = \frac{v}{f_1}[/tex]

=[tex]\frac{344 \, \text{m/s}}{256 \, \text{Hz}}[/tex]

Therefore, the wavelength of the sound wave that the string produces in the air is  = 1.344 m.

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The correct equation for the terminal velocity is Option A

Terminal velocity is the maximum velocity an object will attain while falling through a fluid (such as air or water) under the influence of gravity. It occurs when the sum of the drag force and buoyant force acting on the object is equal in magnitude to its weight, and the object no longer accelerates.

The terminal velocity of an object depends on its mass, size, shape, and the density of the fluid it is falling through. For example, a larger and heavier object will have a higher terminal velocity than a smaller and lighter object.

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No, the two cars are not traveling in the same direction when they pass each other as one is moving upwards while the other is moving downwards.

When two cars pass each other, they are traveling in opposite directions. Because the cars are moving at various speeds, they will cover varying distances. Despite travelling at the same pace and in the opposite directions, the two cars have different velocity. The difference between the individual speeds of two moving objects determines their relative speed. The total of the individual speeds of two objects moving in opposition determines their relative speed. However, stopping distances vary based on the weather and your speed of travel. The stopping distance will grow as you drive faster and the road becomes more slick.

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complete question: The cars travel on the parallel lanes of two-lane road. The cars position is represented by the position versus time graph shown in the figure.

Are the two cars traveling in the same direction when they pass each other?

Headwinds during takeoff help to boost lift, requiring a record low speed as well as a shorter airfield distance for the aircraft to take flight. Similar benefits can be found when landing towards the wind, including a smaller landing area and slower ground speed.

It should come as no surprise that the wind is one of the main factors influencing an aircraft's movements while in flight.

Thus, a round-trip flight takes longer and takes less time when the wind is blowing.

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It would be the first quarter.

Position of the Moon during the First Quarter Moon. First Quarter Moon, as the name suggests, is the second principal Moon phase that occurs when the Moon has completed one-quarter of its cycle around Earth.

Full Moon The lit side of the Moon is facing the Sun at this time, while the night side is facing Earth. This is the moon's invisible phase. New Moon is the first major Moon phase; Full Moon is the third; and Third Quarter Moon is the final major Moon phase.

As a result of their shared sky location during this phase, the Moon rises and sets with the Sun. In addition to being up during the day, the illuminated side is also facing away from the Earth.

Therefore, It would be the first quarter. Once the Moon has finished one-fourth of its orbital period around Earth.

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The impulse of the net force on the ball during its collision with the wall is 20Ns.

The term "impulse" in physics refers to or measures the effect of a force acting gradually to change the velocity of an item. The letter J stands for it and it is frequently expressed in terms of Newton seconds or kilograms per second.

It's common to define impulse as the average net force acting on an object during a predetermined period of time. The following is the given equation for impulse:

J = F⋅Δt

Please take note that we consider force to be constant.

Like force, impulse is a vector quantity that also has a direction.

Impulse=m× final velocity-(-m× initial velocity)

Impulse=0.5×(20+20)

Impulse=20Ns

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In an interference pattern of same frequency a. Wavelength is 82 cm b. Wavelength will not be different if we take a point on the nodal line on the left c.  Frequency of the sources is approximately 0.1159 Hz

In interference pattern:

a. To calculate the wavelength, we can use the formula for the distance between two points in an interference pattern, which is given by d = λ/2, where d is the distance between the two sources and λ is the wavelength of the wave.

Since we know that the distance from one source to the point on the second nodal line on the right from the center is 25 cm and the distance from the other source to the same point is 34 cm, we can calculate the total distance between the two sources as follows:

d = √(25^2 + 34^2) = 41 cm

Therefore, the wavelength is given by:

λ = 2d = 2 * 41 cm = 82 cm

b. The wavelength will not be different if we take a point on the nodal line on the left, because the wavelength of a wave is a characteristic property of the wave and is independent of the location of observer.

c. To calculate the frequency of the sources, we can use the formula for the wave speed, which is given by v = fλ, where v is the speed of the wave, f is the frequency of the wave, and λ is the wavelength of the wave.

In this case, we know the speed of the wave (v = 9.5 cm/s) and the wavelength (λ = 82 cm), so we can calculate the frequency as follows:

f = v/λ = 9.5 cm/s / 82 cm = 0.1159 Hz

So the frequency of the sources is approximately 0.1159 Hz.

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According to coulomb's law, doubling the distance between two charges will change the force by a factor of 1/4.

Coulomb's law is a law that governs the interaction between electric charges, both like and different types of charges. As you know that there are positive and negative electric charges.

Coulomb's law was discovered by a scientist from France, namely Charles-Augustin de Coulomb in 1785. Before discovering the law of the interaction between electric charges, Coulomb had done a lot of research, starting from making compasses, making torsion scales, making works on electricity and magnetism, and much more. other.

Several of Coulomb's works on electricity and magnetism were used as the basis for research and discoveries by later scientists, such as Hans Christian Oersted, Marie Ampere, to Henry Cavendish.

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The total velocity of an object may be calculated by adding the x and y components since velocity is a vector (it has magnitude and direction):

[tex]v^2 = vx^2 + vy^2.[/tex]

An item that is given a starting velocity and is affected by gravity is referred to as a projectile. These outcomes define the course the item takes (ignoring air resistance). The object's course is along this path. Both vertical (y) and horizontal (x) components make up the trajectory.The combined velocity can be calculated by taking the square root of the sum of the squares of the x and y components. This is known as the Pythagorean Theorem:

[tex]v_total = \sqrt(v_x^2 + v_y^2)[/tex]

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Yes. Thermal energy is a type of energy that is directly related to the temperature of an object. When an object is heated, its atoms and molecules begin to move faster, which increases its temperature and its thermal energy.

Conversely, when an object is cooled, its atoms and molecules slow down, reducing its temperature and its thermal energy.

The total energy contained within an object is the sum of its internal energy, which includes thermal energy, and any other forms of energy it may contain, such as kinetic energy or potential energy. When two objects are at different temperatures, the one with the higher temperature will have more thermal energy and therefore more total energy than the one with the lower temperature.

It's important to note that thermal energy is a relative quantity. The amount of thermal energy contained in an object depends on the temperature difference between that object and some reference temperature, typically a temperature of absolute zero, which is the theoretical temperature at which all matter would have no thermal energy.

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Electrical energy transfer is the form of energy transfer with the least amount of waste, as it is highly efficient and produces minimal waste heat. This makes electrical energy transfer an important and reliable source of energy in modern society, as it allows us to make the most of the energy we use, reducing waste and saving resources.

Energy transfer is a crucial process in the functioning of various systems and devices. The energy can be transferred from one form to another, such as from kinetic energy to thermal energy, or from potential energy to kinetic energy. During these transfers, some energy is inevitably lost in the form of waste heat, which is useless and cannot be converted back into useful energy. The amount of waste energy generated during energy transfer varies depending on the form of energy transfer.

Detailed Explanation:

After observing different forms of energy transfer, it can be concluded that the form of energy transfer with the least amount of waste is electrical energy transfer. This is because electrical energy transfer is highly efficient, with only a minimal amount of energy being lost as waste heat.

In electrical energy transfer, electrical energy is transformed into another form of energy, such as light or heat, through the use of electrical circuits and devices. The electrical energy is conducted through wires, which are highly conductive, minimizing energy losses as waste heat. Additionally, modern electrical devices are designed to be highly efficient, converting most of the electrical energy they receive into the desired form of energy, and producing minimal waste heat.

On the other hand, in the transfer of energy from one body to another through conduction, some energy is lost as waste heat due to friction between the two bodies. Similarly, in energy transfer through convection, energy is lost as waste heat due to the mixing of warm and cool fluids. In energy transfer through radiation, some energy is lost as waste heat due to absorption and reflection by the surrounding materials.

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Option A.To calculate the time it takes for a car with initial velocity 15 m/s to slow down to a final velocity of 4 m/s, we can use the following formula:

Δt = (vf - vi) / a

Where:

Δt is the change in time

vf is the final velocity

vi is the initial velocity

a is the acceleration (negative in this case, since the car is slowing down)

Δt = (4 - 15) / -4.5

Δt = 11 / -4.5

Δt = -2.44

Since time can't be negative, we have to take the absolute value of Δt:

Δt = |-2.44| = 2.44 s

Rounding up to the nearest hundredth, we get:

Δt = 2.44 s ≈ 2.44 s = 0.89 s

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The formula for speed is speed = distance/time. Using the given values, we can calculate the observed speed of the ball as follows:

distance = 33.6 ‡ 0.2 cm

time = 11.49 ‡ 0.02 s

speed = distance / time = (33.6 ‡ 0.2) cm / (11.49 ‡ 0.02) s

Using the most probable uncertainty (±0.5 times the smallest uncertainty), we can estimate the uncertainty in the speed calculation as follows:

uncertainty in distance = 0.2 cm

uncertainty in time = 0.02 s

uncertainty in speed = (uncertainty in distance) / (time) ± 0.5 * (smallest uncertainty)

= (0.2) / (11.49) ± 0.5 * (0.02)

= 0.01744 ± 0.01 cm/s

Therefore, the observed speed of the ball is (2.92 ± 0.02) cm/s.

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Using windshield wipers running unchecked will drain battery.

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Graphs of velocity-time with constant velocity are Case 1 (zero acceleration)

Velocity-time graphs with constant acceleration are Case 2.

Case 3: Acceleration graphs of increasing velocity.

Graphs of velocity-time with constant velocity are Case 1 (zero acceleration).

In a velocity-time graph where time is represented by the X-axis and velocity is represented by the Y-axis, the velocity is constant when:

The velocity is constant (c), as seen on the graph, throughout the time period.

The velocity of matter particles will always be c at every instant, regardless of how much time passes. Since the initial velocity was assumed to be positive in this instance.

When the initial velocity is negative, the graph will change.

A particle's velocity will remain constant over time if its acceleration is zero (zero), which is equivalent to a constant speed of 5 m/s at time zero.

Graphs of velocity-time with constant acceleration in Case 2

The equation states that the particle's starting velocity will rise linearly as the acceleration is constant (positive) and positive.

v = u + at

U = 0 and v = at

The particle will move at a linear rate with respect to time, as depicted in the image. You can determine how much acceleration there is by looking at the graph's slope.

Example: The starting velocity is zero and grows linearly if a particle's acceleration is constant (k) and positive. You may determine the acceleration by looking at the velocity-time graph's slope.

Case 3: Acceleration graphs of increasing velocity

The equation: v = u + at predicts that the velocity-time graph will be a curve when the acceleration is increasing with time.

as v= at because u = 0

Because acceleration depends on time, the velocity-time graph will be a curve.

It should be noted that while the acceleration keeps rising with time, so too will the slope's size.

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If a circuit with a battery, a 2 Ω resistor, a 16 Ω resistor, and a 24 Ω resistor in series. The total current is the system is 3.3 A. The voltage drop across the 2 Ω resistor is 6.6V.

1. Voltage drop across the 2 Ω resistor

Voltage drop across the 2 Ω resistor = current through the circuit × resistance of the resistor

Voltage drop across the 2 Ω resistor = 3.3 A * 2 Ω

Voltage drop across the 2 Ω resistor = 6.6 V

2. Voltage of the battery

Let V be the voltage of the battery

V = I * (R1 + R2 + R3)

= 1.9 A * (2 Ω + 13 Ω + 27 Ω) = V

Solving for V, we find that V = 79.1 V

3. Resistance of the unknown resistor

Let R be the resistance of the unknown resistor

0.2 A * R = 100 V - 37 Ω * 0.2 A - 37 Ω * 0.2 A

Solving for R

R = 5 Ω

4. Voltage of the battery

Let V be the voltage of the battery

V = 0.6 A * 10 Ω + 0.6 A * 10 Ω

= 12 V

5. Current through the 8 Ω resistor

Current through the 8 Ω resistor = 2.8 V / 8 Ω

Current through the 8 Ω resistor = 0.35 A

6. The total resistance of a parallel circuit

1/total resistance = 1/9 Ω + 1/15 Ω + 1/27 Ω

Solving for total resistance

Total resistance = 3.33 Ω

7. Current through the battery

Current through the battery = 7.0 V / 3 Ω + 7.0 V / 12 Ω + 7.0 V / 27 Ω.

Solving for the current

Current through the battery = 2.3 A

Therefore the voltage drop across the 2 Ω resistor is 6.6V.

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The light turns green, the driver steps on the gas, and the car accelerates from rest. This situation can best be described as a transformation of e) Potential energy into Kinetic energy.

Potential energy material is included in the discussion of the chapter on mechanical energy. Not only potential energy, this chapter also explains about kinetic energy.

Mechanical energy itself has a definition as energy based on the nature of its motion.

the meaning of potential energy is the energy possessed by an object because of its position relative to a reference. For example, we can see an example of it on a rock that is on the side of the road. The stone has potential energy. When given a force, the stone will fall. Stones on the side of the road with stones placed on the floor of course have different potential energy.

When compared between potential energy and kinetic energy, it is clear that the two have fundamental differences. Kinetic energy is defined as the energy an object has because of its motion.

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Each of the hands will feel a force of about 7.175 × 10¹⁸ N

The formula to calculate total force experienced by the nucleus ?

The force felt by the electrons and the nucleus would be due to the electromagnetic force between the charged particles. The force experienced by each of them can be calculated using Coulomb's law, which states that the force between two charged particles is proportional to the product of their charges and inversely proportional to the square of the distance between them.

To begin with, what remains on the other hand are protons and neutrons; only protons are charged and have the same charge as electrons but with a positive value, so we can easily deduce that the total charge of what remains of the sphere is =

+4.8 x 10⁴ coulombs.

So let's pose ce to be the total charge of the electrons & cp the total charge of the protons, d the distance the separates them. And F the force between them.

ce = -4.8 x 10⁴ coulombs

cp = +4.8 x 10⁴ coulombs

d = 1.70m

So let's apply the formula:

F = k x I ce x cp I /d² K = 9 x 10⁹

F = 9 x 10⁹ x I -4.8 x 10⁴ x +4.8 x 10⁴ I / 1.70²

= [tex]$\frac{9\cdot 10^9\cdot 4.8^2\cdot 10^8}{1.70^2}[/tex]

= 7.175087× 10¹⁸ N

Each of them will feel a force of about 7.175 × 10¹⁸ N

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The electric field from q₃ at the origin is 2.5 x 10⁶ N/C when q₁ is placed on the =y axis ome distance from origin .

An area of influence created by an electric charge is known as the electric field. It is an invisible field that causes other charges in its vicinity to experience an electric force. Depending on the charge's sign, this electric force can be either attractive or repellent. The amount of charge and the distance from the charge determine the magnitude of the electric field.

Electric fields are utilized in numerous applications and are necessary for comprehending the behavior of electric circuits and devices.

                                E = kq/r²,

where k is the Coulomb's constant, q is the charge of the source, and r is the distance from the source to the location of interest, can be used to calculate this.

The Coulomb's constant is 8.99 x 109 Nm²/C²,

the charge of q₃ is q₁/3, and

the distance between q₃ and the origin is d/3.4.

As a result, the electric field from q₃ at the origin is given by

E = (8.99 x 10⁹ Nm²/C²)(q₁/3)/[(d/3.4)²,

which can be simplified to E = 2.5 x 10⁶ N/C.

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The correct voltage is 200 volts.

Voltage is the electrical potential difference between two points in an electrical circuit, expressed in volts. It is the force that causes current to flow through a circuit.A selector switch is a type of switch used to select one of a number of circuit configurations. Selector switches are usually used to change the state of a system or device, such as switching between two different power sources or activating a specific function within a circuit.

The equation is:

[tex]Vout = \frac{Vselector * 48.0 }{ 100}[/tex]

where Vout is the output voltage, Vselector is the selector switch voltage, and 100 is the default selector switch voltage. In this case,

[tex]Vselector = 200 volts[/tex],

[tex]Vout = \frac{200 * 48.0 }{ 100 }\\\\Vout = 48 volts.[/tex]

The correct voltage would be 200v. This is because when the selector switch is in the 200v position, the voltage is multiplied by the ratio of [tex]\frac{48.0}{200} = 0.24[/tex], resulting in a voltage of 200v

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You double your distance from a sound source that is radiating equally in all directions. The intensity of the sound reduces to one-sixteenth its original value.

The pace at which light disperses over a surface of a specific region some distance from a source is referred to as intensity. The intensity changes depending on the source's power and distance from it.

The degree, volume, or magnitude of something is its intensity. Examples include fire, emotion, weather, work, or passion. The word "intensity" is occasionally linked to fervour, fire, and violence. It is employed when describing the intensity of something like a flame or possibly a love affair.

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NOTE: The given question is incomplete on the portal. Here is the complete question

QUESTION: You double your distance from a sound source that is radiating equally in all directions. What happens to the intensity of the sound? It reduces to

(A) one-fourth its original value.

(B) one-eighth its original value.

(C) one-sixteenth its original value.

(D) none of the above