How long will it take for a 1.5A current to coat evenly a layer of copper 0.1mm thick on both sides of a 12cm x 12cm copper plate [e.C.E of copper= 0.00033g/C , density of copper 9g/cm

We need to verify the thrid equation of kinematics here

\(\\ \tt\longmapsto v^2-u^2=2as\)

\(\\ \tt\longmapsto 20^2=2(-8)s\)

\(\\ \tt\longmapsto 400=-16s\)

\(\\ \tt\longmapsto s=|400/-16|\)

\(\\ \tt\longmapsto s=25m\)

The squirrel has a good luck ,Car gets stopped just 1m away from the squirrel .

Explanation:

According to the Question

A squirrel runs out in front of a car moving at +20m/s ( initial speed u) . The driver slams on the brakes and begins decreasing at -8m/s² ( here the acceleration is acting in opposite directions of motion a )

When Squirrel was 26 metres ( Distance from the car initially )

Using Kinematic Equation

On substituting the value we obtain

➥ 0² = 20² + 2 × -8 × s

➥ 0 = 400 - 16 × s

➥ -400 = -16 × s

➥ 400/16 = s

➥ 25 = s

So, the squirrel is 25 metres from the car .

Hi there!

Weight = mass × acceleration due to gravity (or gravitational field strength)

We can write this as:

W = mg

Plug in the given values:

W = 55 × 3.7

W = 203.5 N

Research conducted by Goodale and colleagues suggests that the primary function of the dorsal stream of the visual cortex is to process visual information for guiding actions and motor control, rather than conscious perception.

Goodale and his colleagues have proposed a theory known as the two-stream hypothesis, which suggests that the visual processing in the brain is divided into two distinct streams: the ventral stream and the dorsal stream.

On the other hand, the dorsal stream, referred to as the "where" or "how" pathway, is primarily involved in processing visual information for the purpose of guiding actions and motor control. This stream is responsible for extracting spatial information, motion perception, and the perception of depth and location of objects in the visual field.

Goodale and his colleagues have provided substantial evidence for this hypothesis through various studies, including patient studies with individuals who have damage to the dorsal stream. These patients often experience impairments in their ability to interact with objects in their visual field, even though their conscious perception of those objects remains intact.

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Answer:

The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change.

Answer:

I may be a little late, but it's A i got it right on the exam

Explanation:

All of the following will help you safely cool foods except after a meal put leftovers in a deep container so the food cools down more slowly, therefore the correct answer is option A.

What is thermal energy?

It can be defined as the form of the energy in which heat is transferred from one body to another body due to their molecular movements, thermal energy is also known as heat energy.

The option that will help you safely cool foods is by putting cold foods away immediately after purchasing, Nestle a bowl of cold food in a slightly larger bowl of ice during a picnic, and Transferring cold foods directly from the refrigerator to the cooler when going out.

The right response is A, option a since all of the options will help you safely cool meals, with the exception of putting leftovers in a deep container after a meal to allow them to cool more slowly.

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The distance from the center of the central bright fringe to the third dark fringe on either side is approximately: 4.838 mm.

To find the distance from the center of the central bright fringe to the third dark fringe on either side, we can use the formula for the angular position of a dark fringe in a single-slit diffraction pattern. The formula is:

θ = (2n + 1) * (λ / (2 * a))

where θ is the angular position of the dark fringe, n is the fringe number (in this case, 3), λ is the wavelength of the light (668 nm or 668 x 10^-9 m), and a is the width of the slit (6.73 x 10^-6 m).

Plugging in the values, we get:

θ = (2 * 3 + 1) * (668 x 10^-9 / (2 * 6.73 x 10^-6))
θ ≈ 0.002617 radians

Now we need to find the linear distance on the screen (y) using the formula:

y = L * tan(θ)

where L is the distance between the slit and the screen (1.85 m). Calculating the distance, we get:

y = 1.85 * tan(0.002617)
y ≈ 0.004838 m or 4.838 mm

So, the distance from the center of the central bright fringe to the third dark fringe on either side is approximately 4.838 mm.

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Complete question:

Light that has a wavelength of 668 nm passes through a slit 6.73x10^-6 m wide and falls on a screen that is 1.85 m away. What is the distance on the screen from the center of the central bright fringe to the third dark fringe on either side?

Answer:

It releases hydroxide ions in aqueous solutions.

Explanation:

HCL + NaOH = NaCL + H2O

With reference to the reaction above; an acid(HCL) will reacts with a base(NaOH) to produce salt and water or hydroxide ions.

If you did not have access to a thermometer, you could detect changes caused by a reaction by observing any changes in the appearance of the substances involved, changes in odor or gas production, and changes in the mass of the substances before and after the chemical reaction.

Chemical reactions are processes that involve the breaking and forming of chemical bonds between molecules. In these processes, the identity of the substances involved changes, and new substances with different properties are formed. The properties of these new substances may differ from the properties of the original substances. For instance, a chemical reaction between hydrogen and oxygen produces water.

Unlike the hydrogen and oxygen gases that react, water is a liquid at room temperature and does not burn. Therefore, it has different properties than hydrogen and oxygen gases. There are different types of chemical reactions, including combination reactions, decomposition reactions, single-displacement reactions, double-displacement reactions, acid-base reactions, and combustion reactions. Combination reactions occur when two or more substances combine to form a new substance.

For instance, the reaction between sodium and chlorine to form sodium chloride (table salt) is a combination reaction. Decomposition reactions occur when a single compound breaks down into two or more simpler substances. For example, the decomposition of water into hydrogen and oxygen gases by the action of an electric current is a decomposition reaction.

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A ray of light is travels through air (n = 1.00) and into a Lucite block. Its velocity slows to 2.14 x 10⁸ m/s. The index of refraction for Lucite is 1.40.

An optical media's refractive index, also known as refraction index, is a dimensionless number that indicates how well the medium bends light.With wavelength, the refractive index may change. When refracted, this allows white light to separate into its component hues. It's known as dispersion. In prisms, rainbows, and as chromatic aberration in lenses, this phenomenon can be seen. A refractive index with a complex value can be used to describe how light moves through absorbent materials. The attenuation is then taken care of by the imaginary part, while refraction is handled by the real part. For the majority of materials, the refractive index varies by several percent with wavelength over the visible spectrum.

The index of refraction for Lucite can be calculated by using the equation,

n = \(\frac{c}{v}\), where c is the speed of light in a vacuum and v is the speed of light though Lucite.

So, in this case,

n =\(\frac{3 * 10^8}{2.14*10^8}\) = 1.40

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Answer:

Projectile motion is the motion of an object thrown or projected into the air, subject to only the acceleration of gravity. The object is called a projectile, and its path is called its trajectory. The motion of falling objects, as covered in Problem-Solving Basics for One-Dimensional Kinematics, is a simple one-dimensional type of projectile motion in which there is no horizontal movement. In this section, we consider two-dimensional projectile motion, such as that of a football or other object for which air resistance is negligible.

Explanation:

B the dropped ball

Answer:

kinetic mechanical energy

Answer:

Those sound waves are called kinetic mechanical energy

Explanation:

Sound energy is the result when a force, either sound or pressure, makes an object or substance vibrate. That energy moves through the substance in waves. Those sound waves are called kinetic mechanical energy.

To calculate the book value at year 3 (BV3), we need to determine the accumulated depreciation at year 3. The depreciation is calculated by subtracting the salvage value from the initial cost and dividing it by the number of years.

Initial cost: $20,000

Salvage value: $5,000

Number of years: 5

Depreciation per year = (Initial cost - Salvage value) / Number of years

Depreciation per year = ($20,000 - $5,000) / 5 = $3,000

Accumulated depreciation at year 3 = Depreciation per year * Number of years

Accumulated depreciation at year 3 = $3,000 * 3 = $9,000

Book value at year 3 = Initial cost - Accumulated depreciation at year 3

Book value at year 3 = $20,000 - $9,000 = $11,000

Therefore, the Book Value at year 3 (BV3) is $11,000 (option d).

To calculate the depreciation at year 3 (D3), we can simply use the depreciation per year, which is $3,000. Therefore, the Depreciation at year 3 (D3) is $3,000 (option b).

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When he swings a rubber bung around his head on a string, the centripetal force is caused by the tension in the string.

When an object travels in circular path, a force which makes an object to continue to move in circular motion is the centripetal force which is directed towards the center of the path.

Thus, When he swings a rubber bung around his head on a string, the tension force is developed in the string which is in turn balanced by the centripetal force.

Thus, the centripetal force is caused by the tension in the string.

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In this question, you need to determine the torque.

The formula for torque is

torque = weight * length of the lever arm in meters

Since we are given the mass of each child, we need to solve for their weights, which is found by multiplying their masses by the pull of gravity, which is 9.8 m/sec/sec.  

This gives the weight of the 20 kg child to be 196 Newtons, and the weight of the 30-kg child to be 294 Newtons.  

If the length between the 2 children is 0.5 meters, then let's say that the distance away that the heavier child is from the fulcrum is r.  

That makes the distance that the lighter child is away from the fulcrum as 0.5 - r.  

Now the sum of the torques must equal 0 if the seesaw is to remain balanced.  

Because one torque is positive and one is negative, we can move the negative one over to the other side of the equals sign making them equal to each other, which is what rotational equilibrium is all about.  

Here's our formula thus far:

196(0.5 - r) = 294r and

686 - 196r = 294r and

686 = 490r so

r = 1.4

Therefore, with the help of torque, we get, the heavier child is at the distance of 1.4 m and the lighter child is 3.5 - 1.4 = 2.1 m away.

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Observations in our solar system support the conclusion that collisions between portions of material in the solar system cancel their up-and-down motions, leaving them revolving in a thin disk around the Sun. Observations do not support the conclusion that objects in the far outer solar system orbited so slowly that they would have experienced few collisions, leaving behind small, solid bodies.

The Nebular Condensation Theory proposes that our solar system is formed from a rotating disk of gas and dust called the solar nebula. According to this theory, collisions between portions of material in the solar system canceled their up-and-down motions, resulting in a thin disk of material revolving around the Sun. Observations of our solar system, such as the flattened shape of the planetary orbits and the presence of a protoplanetary disk around young stars, support this conclusion.

Additionally, observations suggest that large collisions can change the rotation directions of planets. This is evident in the case of Uranus, which has an extreme axial tilt likely caused by a past collision. Other examples of planets with tilted axes or unusual rotation patterns also support this conclusion.

However, observations do not support the conclusion that objects in the far outer solar system orbited slowly enough to experience few collisions, resulting in small, solid bodies. Instead, the outer solar system is known to contain a significant population of icy objects, such as dwarf planets and comets, which have likely experienced numerous collisions throughout their history. These collisions have shaped their orbits, compositions, and sizes.

Overall, while some conclusions of the Nebular Condensation Theory plus collisions are supported by observations in our solar system, others do not find substantial evidence in favor.

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Answer:it’s a

Explanation:

Static electricity refers to the buildup or imbalance of electric charges on the surface of objects. The correct answer is B. An insulator prevents electric charge from moving through it.

An insulator prevents electric charge from moving through it. This statement describes an example of static electricity because insulators, such as rubber or plastic, do not allow electric charges to flow freely. When an insulator is rubbed or comes into contact with another object, it can cause the transfer of electrons between the two surfaces, leading to a buildup of static charge.

The charges remain stationary on the surfaces of the objects, resulting in an electrical imbalance without the flow of charges through the insulator.

Therefore, the correct answer is B. An insulator prevents electric charge from moving through it.

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Answer:

The answer is "perpendicular and distance".

Explanation:

The Perpendicularity would be the connection of two lines that meet in such a right angle perpendicularity (90 degrees). It extends to all geometric objects involved.

The Distance was its cumulative motion of a body regardless of the direction that's why the value "d" is perpendicular to the distance from the transformer.

B. 4

That's the correct answer

Answer:

Much magma is generated at a converging plate boundary where subduction is occurring.

Answer:

Triangulation

Distance

Baseline

Far away

Parsec

Hipparcos

Astronomers are known to estimate the distance of nearby objects in space through the use of stellar parallax, or trigonometric parallax.

They often measure a star's  movement using the background of more distant stars as Earth revolves around the sun.

With the use of Parallax, one can get the best way to have the distance in astronomy,

Triangulation is often used instead of parallax to know the terrestrial distances by forming triangles with a predefined base and measuring the angles formed with the other two sides.

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Solving the equation f(x) = 0 will give us the equilibrium points, the differential equation governing z(t) is \(\frac{dz}{dt} = \frac{dx}{dt} = f(x)\), the system trajectories is negative semidefinite: \(\frac{dV(z)}{dt} \leq 0\) for all z and The solution to the linear differential equation can be written as:

\(z(t) = Ce^(^A^t^)\)

a) To find the equilibrium points of the given scalar nonlinear system, we need to set the derivative of the system with respect to the variable (in this case, x) equal to zero. Let's denote the system as dx/dt = f(x).

So, we have:

\(\frac{dx}{dt} = f(x) = 0\)

Solving the equation f(x) = 0 will give us the equilibrium points.

b) For the positive equilibrium point \(xe^+\), let \(z = x - xe^+\). To find the differential equation governing z(t), we substitute this value of z into the original system equation:

\(\frac{dz}{dt} = \frac{dx}{dt} = f(x)\)

Substituting \(z = x - xe^+\) into f(x), we get:

\(\frac{dz}{dt} = f(x) = f(z + xe^+)\)

c) To show that \(V(z) = (1/2)z^2\) is a Lyapunov function, we need to demonstrate the following properties:

V(z) is positive definite: V(z) > 0 for all z ≠ 0, and V(0) = 0.

V(z) is radially unbounded: V(z) approaches infinity as z approaches infinity.

The derivative of V(z) along the system trajectories is negative semidefinite: \(\frac{dV(z)}{dt} \leq 0\) for all z.

d) For z ≈ 0, we can consider the linearized form of the system around the equilibrium point z = 0. This involves finding the linear differential equation governing z(t), which can be obtained by linearizing the nonlinear system equation around z = 0.

The linearized equation will have the form:

\(\frac{dz}{dt} = Az\)

Where A is the Jacobian matrix evaluated at the equilibrium point z = 0.

The solution to the linear differential equation can be written as:

\(z(t) = Ce^(^A^t^)\)

Where C is a constant determined by the initial conditions.

To argue that the equilibrium point \(ze = 0\) is asymptotically stable, we need to show that all trajectories starting sufficiently close to z = 0 converge to the equilibrium point as t → ∞. This can be inferred by examining the eigenvalues of the matrix A. If all eigenvalues have negative real parts, then the equilibrium point is asymptotically stable.

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Answer:

A force is a push or a pull.

Explanation:

Example: A boy is pushing a box. He has to push the box to go forward or pull it to go backwards.

Hope this helped

Answer:

because of where we are and our distance away from them, in reality they're giant balls of burning gas, like the sun. some stars are even bigger than the sun

Explanation:

Answer:

rbeta=rearth

Explanation:

khan

Planet Beta has 2 times the gravitational field strength and 2 times the mass of the Earth.

How does the radius of planet Beta compare with the radius of Earth?

Answer: CORRECT (SELECTED

rBeta = rEarth

Hard Disk Drive (HDD) is the storage devices that are supported by the linux operating system uses electromechanical devices that use magnetic storage technology to store data, usually in large amounts.

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An electron is in the ground state of an infinite well (a box) where its energy is 5.00 ev. In the next higher level, its energy would be 20.25 eV.

In an infinite well, the energy levels of an electron are quantized, meaning they can only exist at certain discrete energy levels. The ground state is the lowest energy level an electron can occupy in the well. In this scenario, the electron is in the ground state with an energy of 5.00 eV.

To find the energy of the next higher level, we need to use the formula for the energy levels of an infinite well:

\(E_n = (n^2 * h^2) / (8mL^2)\)

where \(E_n\) is the energy of the nth level, n is the quantum number (which starts at 1 for the ground state), h is Planck's constant, m is the mass of the electron, and L is the length of the well.

To find the energy of the next level, we can substitute n = 2 into the equation:

\(E_2 = (2^2 * h^2) / (8mL^2)\)
Simplifying this equation, we get:

\(E_2 = (4 * 6.626 \times 10^{-34} J s)^2 / (8 * 9.109 \times 10^{-31 } kg * (L in meters)^2)\)

Converting the answer to eV, we get:

\(E_2\) = 20.25 eV

Therefore, the energy of the next higher level in the infinite well is 20.25 eV, which is a difference of 15.25 eV from the ground state energy of 5.00 eV.

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Answer:

t = 2.01 seconds

Explanation:

It is given that,

The acceleration of the elevator is 4.55 m/s².

We need to find time taken by you to reach a speed of 11 m/s

The initial velocity of the person is equal to 0 (at rest). Let t is the time.

Using equation of kinematics as follows :

v = u +at

Acceleration = g-a and u = 0

So,

\(t=\dfrac{v}{g-a}\\\\t=\dfrac{11}{10-4.55}\\\\t=2.01\ s\)

So, 2.01 seconds is taken to reach a speed of 11 m/s.

Homogeneous Mixture: Its components are not visible, It may be mistaken for a pure substance.

Heterogeneous Mixture: Its components are visible, It can be separated using distillation and Concrete is an example of this kind of mixture

A homogeneous mixture is a combination of substances where the components are evenly distributed and not visibly distinct. The particles are uniformly mixed on a microscopic level, creating a consistent composition throughout the mixture. This type of mixture may appear as a single substance and can be difficult to differentiate from a pure substance without further analysis.

On the other hand, a heterogeneous mixture is characterized by its visible components. The different substances or phases within the mixture are not uniformly distributed, and the composition can vary in different regions. Heterogeneous mixtures can be separated using methods like distillation, which take advantage of the varying properties of the components.

Concrete, which contains aggregates such as sand, gravel, and cement, is an example of a heterogeneous mixture. Its components are easily identifiable, and the varying distribution of materials gives concrete its characteristic appearance and properties.

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When a light ray is incident perpendicular to the boundary between two transparent materials, the angle of refraction is 0 degrees.

It's important to understand the concept of refraction. Refraction occurs when a light ray passes through a boundary between two materials with different refractive indices. The refractive index is a measure of how much a material can bend light, and it varies depending on the properties of the material.

This is a relatively straightforward and simple concept, so there is not a long answer to your question. However, it's important to note that if the incident light ray is not perpendicular to the boundary, then it will bend as it enters the second material, and the angle of refraction will be different.

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