two conducting spheres with radii r1 and r2 are located very far apart (drawing is not to scale) so that the charge distributions on the spheres are uniform. they are connected by a very long thin conducting wire. what is the ratio of the charges q1/q2 on the surfaces of the spheres?

The tension in the string is 92.21 N.

To find the tension in the string, we need to use the concept of buoyancy.
First, let's find the volume of the rock that is submerged in water. We know that the rock's density is 4500 kg/m3, and half of its volume is submerged in water, so we can set up the equation:
(4500 kg/m3) x (0.5 x rock's volume) = 9.00 kg
Simplifying this equation, we get:
rock's volume = (2 x 9.00 kg) / 4500 kg/m3
rock's volume = 0.0004 m3

Now, we can find the weight of the water displaced by the submerged portion of the rock:
weight of water displaced = (density of water) x (submerged volume of rock) x (acceleration due to gravity)
weight of water displaced = (1000 kg/m3) x (0.0004 m3) x (9.81 m/s2)
weight of water displaced = 3.92 N

According to Archimedes' principle, the buoyant force acting on the submerged portion of the rock is equal to the weight of the water displaced. So, the tension in the string is equal to the weight of the rock plus the buoyant force:
tension in string = weight of rock + buoyant force
tension in string = (9.00 kg) x (9.81 m/s2) + 3.92 N
tension in string = 88.29 N + 3.92 N
tension in string = 92.21 N

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The carrying capacity for moose on the island primarily depends on the rate of plant growth, as this is the primary food source for moose.

As plant growth increases, the island can support a larger population of moose. However, if the population of moose grows too large, it may exceed the carrying capacity of the island, leading to overgrazing and a decline in the plant population. The number of wolves and the growth rate of the wolf population can also have an impact on the carrying capacity of moose, as wolves are natural predators of moose and can help regulate their population.

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The Syrian people's initial reaction to the war was diverse and influenced by their unique backgrounds and encounters.

The Syrian People have been enormously influenced by the war coordinated by their government, coming about in huge misfortune of life, uprooting, and foundation harm.

At the begin of the struggle in Syria, certain people appeared backing for the government's campaign to control the disobedience, considering the resistance to be a danger to the country's soundness and security. A few people voiced their objection of the government's activities and requested changes in legislative issues and society to go up against deep-rooted abberations and disparities.

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A model used to explain the composition and structure of an atom is known as a "atomic model" in physics.

Thus,  Over time, atomic models have undergone numerous modifications in order to better fit experimental evidence.

The Greek atomic theory was not founded on natural observations, measurements, tests, or experiments, despite its historical and philosophical significance.

Atomic model proposed by Dalton was well received. It was consistent with experimental findings and combined the previously understood concepts of the law of conservation of mass, the law of definite proportions, and the law of numerous proportions.

Thus, A model used to explain the composition and structure of an atom is known as a "atomic model" in physics.

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Option B: The friction force is a horizontal force applied to the box by the floor. This is due to Newton's third law of motion, which states that every action has an equal and opposite reaction.

The reaction force is a horizontal force in the opposite direction applied by the box to the floor.
When you drag a heavy box along a rough horizontal floor, the force of friction is acting in the opposite direction to the motion of the box.

This frictional force is due to the irregularities in the surface of the floor that oppose the movement of the box. According to Newton's third law of motion, every action has an equal and opposite reaction. Therefore, the reaction force to the friction force on the box is a horizontal force in the opposite direction applied by the box to the floor.

Hence ,The reaction force to the friction force on the box is a horizontal force in the opposite direction applied by the box to the floor. This is due to Newton's third law of motion, which states that every action has an equal and opposite reaction.

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Therefore, the velocity between the bars is 3.13 ft/s. Therefore, the head loss across the clean bar screen is 0.89 inches.

(a) The velocity between the bars can be calculated using the following formula:

Vb = Va / (1 - (Nb / Na))

where Vb is the velocity between the bars, Va is the approach velocity, Nb is the number of bars per foot, and Na is the net area of the bars.

Nb can be calculated as:

Nb = 12 / (s + t)

where s is the clear spacing between the bars and t is the thickness of the bars. Substituting s = 1.5 in and t = 0.5 in, we get:

Nb = 12 / (1.5 + 0.5)

= 8 bars/ft

Na can be calculated as:

Na = 1 - (Nb x t / s)

Substituting Nb = 8 bars/ft, s = 1.5 in, and t = 0.5 in, we get:

Na = 1 - (8 x 0.5 / 1.5)

= 0.33

Substituting Va = 2.1 ft/s and Na = 0.33, we get:

Vb = 2.1 / (1 - 0.33)

= 3.13 ft/s

(b) The head loss across the clean bar screen can be calculated using the following formula:

hL = Kb x (Vb² / 2g)

where hL is the head loss, Kb is a coefficient that depends on the shape and arrangement of the bars, Vb is the velocity between the bars, and g is the acceleration due to gravity.

For a rectangular channel with a bar screen having 1.5 in clear spacing and 0.5 in thickness, the value of Kb is approximately 0.6. Substituting Kb = 0.6, Vb = 3.13 ft/s, and g = 32.2 ft/s², we get:

hL = 0.6 x (3.13² / 2 x 32.2) = 0.89 in

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Option B, number 03 who is running at 20 m/s in the eastern direction. Among the given options, number 03 has the same velocity as the soccer player with the ball.

Since the player with the ball is running east at 20 m/s, the opposing player who has the same velocity must also be running at 20 m/s in the eastward direction.

Option B is the only choice that meets these criteria.
The opposing player who has the same velocity as the player with the ball is number 03 who is running at 20 m/s in the eastward direction.

Hence, Among the given options, number 03 has the same velocity as the soccer player with the ball.

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To find the pressure exerted by a column of mercury 1.60 m high, we can use the equation:

pressure = density x gravity x height

where density is the density of mercury (13.5951 g/cm3), gravity is the acceleration due to gravity (9.81 m/s2), and height is the height of the column of mercury (1.60 m). We first need to convert the density from g/cm3 to kg/m3 by multiplying by 1000:

density = 13.5951 g/cm3 x 1000 kg/g = 13595.1 kg/m3

Plugging in the values, we get:

pressure = 13595.1 kg/m3 x 9.81 m/s2 x 1.60 m
pressure = 211431.89 Pa

To convert from pascals (Pa) to atmospheres (atm), we can divide by the standard atmospheric pressure at sea level (101325 Pa/atm):

pressure = 211431.89 Pa / 101325 Pa/atm
pressure = 2.087 atm

Therefore, the pressure exerted by a column of mercury 1.60 m high is 2.087 atm.

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Harlow Shapley's discovery related to globular clusters and their distribution in space. Harlow Shapley found that globular clusters were roughly distributed throughout a spherical volume of space, and realized that this distribution could be used to determine the location of the Milky Way's center. By observing the positions and distances of these clusters, Shapley was able to estimate the position of our galaxy's center, which he determined to be located at a considerable distance from our Solar System. This finding helped to reshape our understanding of the Milky Way and our place within it.

Distribution of globular clusters in space: Shapley studied the distribution of globular clusters in space, which are collections of hundreds of thousands of stars that orbit the center of the Milky Way. By mapping the distribution of these clusters, Shapley was able to determine that the center of the Milky Way was not located where previously thought.

Mapping the Milky Way's spiral arms: Shapley was able to map the Milky Way's spiral arms using the distribution of young, bright stars. This helped him to determine that the Milky Way was much larger than previously thought.

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To calculate the work needed to move an electron from the positive to the negative terminal of a car battery with a potential difference of 12 V, you can use the following formula:

Work = Charge × Potential difference

Step 1: Identify the charge of an electron. The charge of an electron is -1.6 × 10^-19 Coulombs.

Step 2: Identify the potential difference between the terminals. In this case, the potential difference is 12 V.

Step 3: Calculate the work.
Work = (-1.6 × 10^-19 C) × (12 V)
Work = -1.92 × 10^-18 Joules

So, the work needed to move an electron from the positive to the negative terminal of the car battery is -1.92 × 10^-18 Joules. The negative sign indicates that the work is done against the electric field.

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Friction between moving engine parts raises their temperatures and wears them down.

Friction is the force that prevents solid surfaces, fluid layers, and material elements from sliding against each other. There are various kinds of friction: Dry friction is the force that opposes the relative lateral motion of two in touch solid surfaces.

Different Types of Friction

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If the body's emissivity is about 0.90, 122.96 W is the net radiation from the body when the ambient temperature is 11°C.

To calculate the net radiation from the body, we will use the Stefan-Boltzmann Law, which states:
P = ε * σ * A * [tex](T1^4 - T2^4)[/tex]
where P is the net radiation, ε is the emissivity, σ is the Stefan-Boltzmann constant (5.67 x[tex]10^{-8} W/m^2K^4[/tex]), A is the surface area, T1 is the skin temperature in Kelvin, and T2 is the ambient temperature in Kelvin.
First, convert the temperatures from Celsius to Kelvin:
T1 = 33°C + 273.15 = 306.15 K
T2 = 11°C + 273.15 = 284.15 K
Now, plug the given values into the equation:
P = 0.90 * (5.67 x [tex]10^{-8} W/m^2K^4[/tex]) * 1.4 m² * [tex](306.15^4 K^4 - 284.15^4 K^4)[/tex]Calculate the result:
P ≈ 122.96 W
The net radiation from the body when the ambient temperature is 11°C is approximately 122.96 W.

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The magnitude of the drag force on the ball depends on factors such as the shape and size of the ball, the air density, and the speed of the ball relative to the air. Without additional information about these factors, we cannot determine the magnitude of the drag force. D. There is insufficient information to solve this problem.

The weight (W) of the cue ball and its downward acceleration (g/3) are given. To find the magnitude of the drag force (Fd), we can use Newton's second law of motion, which states:

Fnet = ma

Since the ball is falling downward, the net force (Fnet) acting on it is the difference between its weight (W) and the drag force (Fd). Therefore, we can rewrite the equation as:

W - Fd = ma

We know that a = g/3, so we can substitute this into the equation:

W - Fd = m(g/3)

Now we need to solve for Fd:

Fd = W - m(g/3)

Since there is no information provided about the mass (m) of the cue ball, we cannot determine the exact value of the drag force (Fd). Therefore, the answer is:

D. There is insufficient information to solve this problem.

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The distance between the first and second dark fringes is approximately 168.9 mm.

We can use the equation for the location of the dark fringes in a double-slit experiment:

dsinθ = mλ

where d is the distance between the slits, θ is the angle between the line from the slits to the fringe and the line perpendicular to the screen, m is the order of the fringe (m = 0 for the central maximum), and λ is the wavelength of the light.

In this case, we want to find the distance between the first and second dark fringes, which means we need to find the difference in the values of θ for m = 1 and m = 2. We can do this by solving for θ using the given values:

d = 0.310 mm = 0.310 × 10²-3 m

λ = 4.80 × 10²-7 m

L = 1.90 m

For m = 1:

sinθ1 = (m1λ) / d = (1 × 4.80 × 10²-7) / (0.310 × 10²-3) = 0.001548

θ1 = sin²-1(0.001548) = 0.0884 radians

For m = 2:

sinθ2 = (m2λ) / d = (2 × 4.80 × 10²-7) / (0.310 × 10²-3) = 0.003097

θ2 = sin²-1(0.003097) = 0.177 radians

The distance between the first and second dark fringes is the difference in the values of θ:

θ2 - θ1 = 0.177 - 0.0884 = 0.0886 radians

To find the distance between the fringes on the screen, we can use the small angle approximation:

y ≈ Lθ

where y is the distance on the screen from the central maximum to the fringe, and θ is the angle we just calculated.

y = Lθ = (1.90) × (0.0886) = 0.1689 m

Finally, we can convert this to millimeters:

0.1689 m = 168.9 mm

Therefore, the distance between the first and second dark fringes is approximately 168.9 mm.

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Answer:

The last answer, 234/90Th

Explanation:

The Th goes through the reaction, splitting up into Ra + He, which are the products.

This is shown by the arrow

Answer:

D. 234/90Th

Explanation:

the person above is correctttt

The distance that m2 is below the ceiling is given by the equation:

l1 + m1g/k1 + l2 + m2g/k2.

To solve this problem, we can use the principles of Hooke's Law for springs and the concept of equilibrium.

Let's first consider the equilibrium position of the system, where both springs are at their natural lengths and the masses are not moving. At this point, the gravitational force on each mass is balanced by the upward force from the springs.

Next, we can calculate the total force acting on m1 by considering the forces from both the top spring and the weight of m1:

F1 = k1(x1 - l1) + m1g

where x1 is the displacement of m1 from its equilibrium position, and g is the acceleration due to gravity.

Similarly, we can calculate the total force acting on m2 by considering the forces from both the bottom spring and the weight of m2:

F2 = k2(x2 - l2) + m2g

where x2 is the displacement of m2 from its equilibrium position.

At equilibrium, both F1 and F2 must be equal to zero. We can use these equations to solve for x1 and x2:

k1(x1 - l1) + m1g = 0

x1 = l1 + m1g/k1

k2(x2 - l2) + m2g = 0

x2 = l2 + m2g/k2

To find the distance that m2 is below the ceiling, we need to add up the displacements of both masses:

x_total = x1 + x2

x_total = l1 + m1g/k1 + l2 + m2g/k2

Therefore, the distance that m2 is below the ceiling is given by:

x_total = l1 + m1g/k1 + l2 + m2g/k2

Note that this equation assumes that the springs and masses are all hanging vertically and that there is no external force or motion. If the system is not in equilibrium or there is some external force, the equation may be more complicated.

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The probable question may be:

A spring of equilibrium length l 1 and spring constant k1 hangs from the ceiling. mass m 1 is suspended from its lower end. then a second spring, with equilibrium length l 2 and spring constant k2 , is hung from the bottom of m 1 . mass m 2 is suspended from this second spring. how far is m 2 below the ceiling?  Express your answer in terms of the variables l1, l2, m1, m2, k1, k2 and g.

The steepest inclination angle of a street on which a car can be parked (with wheels locked) without slipping, given a coefficient of static friction μs = 0.70, is 35°.


1. To determine the maximum inclination angle without slipping, we will use the formula for static friction: Fs = μs * Fn, where Fs is the static friction force, μs is the coefficient of static friction, and Fn is the normal force.

2. When the car is parked on an inclined street, the maximum static friction force is equal to the gravitational force acting on the car along the slope: Fs = m * g * sin(θ), where m is the mass of the car, g is the acceleration due to gravity, and θ is the inclination angle.

3. The normal force is equal to the gravitational force acting on the car perpendicular to the slope: Fn = m * g * cos(θ).

4. Substitute these expressions into the static friction formula: μs * m * g * cos(θ) = m * g * sin(θ).

5. The mass and gravitational acceleration can be canceled out: μs * cos(θ) = sin(θ).

6. Divide both sides by cos(θ): μs = tan(θ).

7. Find the inverse tangent of μs: θ = arctan(0.70).

8. Calculate the angle: θ ≈ 35°.

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Answer: causes the match to heat up

Explanation: If the match is struck against the striking surface, the friction causes the match to heat up. A small amount of the red phosphorus on the friction surface is converted into white phosphorus. The heat ignites the phosphorus that has reached the match head of the match when rubbing.

To achieve the most precise wavelength value with the least variation or spread in values when taking measurements with different slit dimensions, you should use a narrower slit.

A narrower slit will result in a wider diffraction pattern, which allows for better resolution and increased precision in determining the wavelength value.

A narrower slit will produce a wider diffraction pattern, which allows for better resolution and increased precision in determining the wavelength value.

This is because the fringes are more spread out, making it easier to distinguish between them and accurately measure their spacing. In contrast, a wider slit produces a narrower diffraction pattern, which can make it difficult to accurately measure the spacing between fringes.

Furthermore, using a narrower slit can also reduce the effect of other sources of error in the measurement.

For example, variations in the slit width or orientation can cause the diffraction pattern to shift, which can affect the measurement of the fringe spacing and the calculated wavelength value.

A narrower slit reduces the effect of these errors by reducing the amount of light that passes through the slit and minimizing the shift in the diffraction pattern.

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The diameter of the coil is twice the radius: d = 2R = 2(0.0006235 m) = 0.001247 m = 1.25 mm

To find the diameter of the coil, we can use the formula for the magnetic field at the center of a current loop:

[tex]B = (μ₀ * n * I * A) / (2 * R)[/tex]

where B is the magnetic field, μ₀ is the permeability of free space (4π x 10^-7 T·m/A), n is the number of turns, I is the current, A is the area of the loop, and R is the radius of the loop.

First, let's find the area of the loop:

[tex]A = π * r^2[/tex]

where r is the radius of the loop. Since we want to use the entire wire, we can assume that the wire is coiled tightly and the diameter of the coil is equal to the diameter of the wire:

d = 2r = 2(0.500 m) = 1.000 m

Therefore, the radius of the loop is:

r = 0.500 m

And the area of the loop is:

[tex]A = π * (0.500 m)^2 = 0.785 m^2[/tex]

Now we can rearrange the formula for R:

[tex]R = (μ₀ * n * I * A) / (2 * B)[/tex]

Plugging in the given values, we get:

[tex]R = (4π x 10^-7 T·m/A * n * 0.500 A * 0.785 m^2) / (2 * 1.00 x 10^-3 T) = 0.0006235 m[/tex]

Finally, the diameter of the coil is twice the radius:

d = 2R = 2(0.0006235 m) = 0.001247 m = 1.25 mm (to two significant figures)

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Answer:

I don't know all but three I know are: d orbitals, transition and d-block

the current that will produce a voltage drop of 5.0 V across the resistor is 2.5 A.

We can use Ohm's law to solve this problem. Ohm's law states that the voltage drop (V) across a resistor is equal to the product of the current (I) flowing through the resistor and the resistance (R) of the resistor, i.e., V = IR.

We are given that the voltage drop across the resistor is 6.0 V when the current is 3.0 A. Using Ohm's law, we can find the resistance of the resistor as:

R = V/I = 6.0 V / 3.0 A = 2.0 ohms

Now, we need to find the current that will produce a voltage drop of 5.0 V across the same resistor. Again, using Ohm's law, we have:

I = V/R = 5.0 V / 2.0 ohms = 2.5 A

Therefore, the current that will produce a voltage drop of 5.0 V across the resistor is 2.5 A.

Additionally, it's worth mentioning that voltage drops across resistors can be used to control the flow of current in a circuit. By adjusting the resistance value of a resistor, we can change the amount of voltage that is dropped across it, which in turn affects the current flowing through it.

This principle is widely used in electronic circuits for applications such as regulating the brightness of LEDs or controlling the speed of motors.

Finally, it's worth noting that in real-world circuits, the resistance of a resistor can vary slightly due to factors such as temperature, manufacturing tolerances, and aging. Therefore, it's important to choose resistors with appropriate tolerances and to take these factors into account when designing circuits.

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To complete the activity of sorting key terms and expressions related to electricity and magnetism into their respective columns, follow these steps:

1. Read the question carefully and understand the key terms and expressions listed in the item bank.
2. Identify the columns that represent electricity and magnetism.
3. Click on each term in the item bank to see if additional information is provided.
4. Determine which column the term is associated with—either electricity or magnetism.
5. Drag and drop the term into the correct column, keeping in mind that order does not matter.

By following these steps, you will have sorted the key terms and expressions related to electricity and magnetism into their appropriate columns.

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Energy that is transferred between a system and its surroundings due to a difference in temperature is called heat.

Heat can be transferred from one place to another by three methods: conduction in solids, convection of fluids (liquids or gases), and radiation through anything that will allow radiation to pass. If there is a temperature difference in a system, heat will always move from higher to lower temperatures.

Conduction is the movement of heat through a substance by the collision of molecules. At the place where the two object touch, the faster-moving molecules of the warmer object collide with the slower moving molecules of the cooler object. As they collide, the faster molecules give up some of their energy to the slower molecules. The slower molecules gain more thermal energy and collide with other molecules in the cooler object.

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Answer:

12250 kgms-1

Explanation:

momentum=mass ×velocity ,mass= w÷g so 3500 ÷ 10=350

=350kg×35 ms-1

=12250 kgms-1

Observational evidence confirms that tidal heating is important on Io because the Galileo spacecraft measured the high temperature on Io's surface, which can only be explained by the significant tidal heating caused by its orbit around Jupiter.

The spacecraft also observed volcanic activity and plumes on Io, which are consistent with the theory that tidal heating causes the moon's interior to be molten and leads to volcanic eruptions. Therefore, although we cannot directly observe tidal forces or tidal heating, the evidence collected by spacecraft and other observational tools strongly supports their existence and importance in shaping the characteristics of moons like Io. However, observational evidence confirming that tidal heating is important on Io, one of Jupiter's moons, includes its high volcanic activity and the presence of over 400 active volcanoes. The immense gravitational pull from Jupiter and its other moons creates tidal forces, which cause Io's interior to flex and generate heat through friction. This heat, in turn, drives the intense volcanic activity observed on Io's surface.

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The work done on the box from x = 0m to 2.0m is 30 J.

To find the work done on the box from x = 0m to 2.0m, we need to calculate the area under the force vs. position graph between these two points.

First, we can calculate the displacement of the box by subtracting the initial position from the final position:

displacement = final position - initial position = 2.0 m - 0 m = 2.0 m

Next, we can calculate the average force on the box by finding the average of the initial and final forces:

average force = (F_initial + F_final) / 2 = (10 N + 20 N) / 2 = 15 N

Finally, we can calculate the work done on the box using the formula:

work = force x distance x cos(theta)

where force is the average force, distance is the displacement, and theta is the angle between the force and displacement vectors. In this case, since the force and displacement are in the same direction, the angle between them is zero, and cos(theta) = 1. Therefore:

work = 15 N x 2.0 m x 1 = 30 J

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The volume of the given solid is 8/3π.

To find the limits of integration in the polar coordinates.
In the first octant, we have:
0 ≤ θ ≤ π/2 (since we are in the first octant)
0 ≤ r ≤ √(7/(2+4cos^2θ+4sin^2θ)) (using the equation of the paraboloid z=1+2x^2+2y^2 and the plane z=7)
Now, we can set up the integral in polar coordinates:
V = ∫∫∫ dzdydx
Since the volume element in polar coordinates is r dr dθ dz, we have:
V = ∫(∫(∫ dz)dr)dθ
V = ∫(∫(7 - (1+2r^2sin^2θ+2r^2cos^2θ))rdr)dθ
V = ∫(∫(6r - 2r^3)dr)dθ
V = ∫(3r^2 - r^4) dθ from 0 to π/2
V = ∫(3(7/(2+4cos^2θ+4sin^2θ))^2 - (7/(2+4cos^2θ+4sin^2θ))^4) dθ from 0 to π/2
8/3π.

Hence, The volume of the given solid is 8/3π.

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A nodal voltage source is a type of voltage source that is connected directly between two nodes in a circuit, rather than being connected in series with a circuit element.

Nodal analysis is a circuit analysis technique that uses Kirchhoff's Current Law (KCL) to determine the voltage at each node in a circuit. When a voltage source is connected between two nodes, it can be included in nodal analysis as a source term in the equation for the corresponding node.

The voltage value of the source is simply included as a known value in the equation. This technique can be used to analyze complex circuits with multiple voltage sources and circuit elements.

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Answer:

1000 x 30 squared x 1/2 = 450000

Explanation:

1000 x 30 squared x 1/2 = 450000