what does a magnetic field look like
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Single Wire moves down, loop rotates left.

A single-wire system is a method of transmitting power or signals using only a single conductor. This is in contrast to the usual use of a pair of wires to provide a complete circuit, or an electrical cable containing (at least) two conductors for this purpose.

A single-wire transmission line is not the same as a single-wire earth return system. This is beyond the scope of this article. The latter system relies on reverse current flow through earth, using earth as a second conductor between earth terminal electrodes. A single-wire transmission line does not have a second conductor of any kind. 

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Answer:

The decay constant, or "lambda" (λ), is the rate at which a radioactive isotope decays. It is usually measured in units of inverse time, such as seconds. In this case, the decay constant can be calculated as follows:

16:42

λ = (ln(2)/3.57 x 106) x (5.78 x 1017) = 0.

Explanation:

Answer:

Inertia; Newton's First Law

Explanation:

When you hit you're breaks, the force you feel that pulls you forward is due to inertia.

Newton's first law says that "every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force." The question is a perfect example of this.

It is due to the inertia of motion of the objects that they fall on the floor bed. This is also called Newton's first law of motion.

Newton's first law of motion is known as the law of inertia.

Given is a man who is driving a car at 35 mph hits his brakes suddenly in order to avoid hitting a dog. During the incident, everything in the front seat of his car slides forward and into the floorboard.

The property of body by virtue of which it resist any change in its state of rest or uniform motion is called inertia of body. When the car was moving at 35 mph, every object on front seat was also moving with the same speed. However, when the brakes were applied, they were applied on the car and not on the objects in the front seat. Hence, they keep moving forward and stop only when they strike and fall down. This is called inertia of motion. This is Newton's first law of motion.

Therefore, it is due to the inertia of motion of the objects that they fall on the floor bed. This is also called Newton's first law of motion.

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Answer:

If theta is equal to 90, then both projectiles strike at the same distance from the projection point and projectiles are in air for the same time interval.

Explanation:

A VfL (Vertical Field LED) backlighting system is commonly used in LCD (Liquid Crystal Display) televisions.

LCD TVs rely on a backlight to illuminate the liquid crystal layer, which controls the passage of light to create the visual image. The VfL technology is a specific type of LED backlighting arrangement used in certain LCD TV models. In a VfL backlighting system, the LEDs (Light-Emitting Diodes) are positioned vertically along the edges of the LCD panel.

The light emitted by these LEDs is directed across the panel using light guides or optical films, illuminating the liquid crystal layer uniformly. One advantage of VfL backlighting is its ability to provide consistent illumination across the LCD panel, reducing any potential inconsistencies in brightness or color uniformity. The vertical orientation of the LEDs allows for more precise control over light distribution, improving overall image quality.

Additionally, VfL backlighting offers potential advantages in terms of power efficiency. By selectively dimming or turning off specific zones of LEDs, local dimming techniques can be employed to enhance contrast and black levels, resulting in improved picture quality while conserving energy. It's important to note that VfL backlighting is just one of several backlighting technologies available for LCD TVs.

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Answer:

Coulomb's law calculates the magnitude of the force F between two point charges, q1 and q2, separated by a distance r. F=k|q1q2|r2.

Explanation:

Answer:

Newton's first law, also known as the law of inertia, states that an object will remain at rest or in motion at a constant velocity unless acted upon by an external force. In other words, an object will not change its velocity on its own, it will only do so if something else pushes or pulls on it. This law is a fundamental principle of classical mechanics, and it helps to explain the behavior of objects under various conditions.

Explanation:

Answer: Newton first law states that an object at rest tends to stay at rest. an object in motion tends to stay in motion in a straight line at a constant speed until another force acts on the object.  It is also called the law of inertia

Explanation: Newton’s first law states that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.

Hope this was helful

a) , it would take approximately 0.4638 seconds for the magnetic energy to decay to 13% of its maximum value.. b)  the voltage across the inductor at the instant when the magnetic energy has decayed to 13% of its maximum value is 6.4 times the initial current in the circuit.

An RL circuit consists of a resistor (R) and an inductor (L) connected in series. When a battery is connected to the circuit, the inductor stores magnetic energy, which creates a magnetic field. When the battery is removed, the magnetic energy in the inductor begins to decay, and the magnetic field collapses, inducing a voltage across the inductor.

a) The time constant (τ) of an RL circuit is given by the formula:

τ = L/R

where L is the inductance in henries, and R is the resistance in ohms. The time constant represents the time required for the magnetic energy to decay to approximately 36.8% of its maximum value.

In this case, L = 5 H and R = 22 ohms. Therefore, the time constant of the circuit is:

τ = L/R = 5 H / 22 ohms = 0.2273 seconds

To calculate the time required for the magnetic energy to decay to 13% of its maximum value, we can use the formula:

t = -ln(0.13) * τ

where ln is the natural logarithm. Plugging in the values, we get:

t = -ln(0.13) * 0.2273 seconds

t = 0.533 seconds

Therefore, it would take approximately 0.533 seconds for the magnetic energy in the inductor to decay to 13% of its maximum value.

b) To find the voltage across the inductor at that instant, we can use the formula:

V = L * di/dt

where V is the voltage across the inductor, L is the inductance, and di/dt is the rate of change of the current in the circuit.

At the instant when the magnetic energy in the inductor has decayed to 13% of its maximum value, the current in the circuit is given by:

I = I0 * e^(-t/τ)

where I0 is the initial current, and e is the mathematical constant approximately equal to 2.71828. Plugging in the values, we get:

I = I0 * e^(-0.533/0.2273)

I = 0.292 * I0

Therefore, the rate of change of current (di/dt) at that instant is given by:

di/dt = I / τ = (0.292 * I0) / 0.2273

Now, we can calculate the voltage across the inductor:

V = L * di/dt = 5 H * (0.292 * I0 / 0.2273)

V = 6.4 * I0 volts

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Answer:

33,333.3J/s

Explanation:

Energy expended which is the work done in Joule

=250,000J

Time taken to expend the energy =7.5s

Power =Unknown

Formula

Power = Work

Time

Hence, Power = 250,000J

7.5s

Power = 33,333.3J/s

The electric force will be 1.5f if the particles charge is tripled and the electric field strength is halved.

Given the electric force on a charged particle = f

Let the electric field strength = E

Let the charge on the particle = q

The electric force acting on the particle = f = qE

Here, the particles charge is tripled = q2 = 3q

The electric field strength is halved = E2 = E/2

Let the changed electric force = F2

We know that F = qE such that:

F2 = q2E2 = 3q x E/2 = 3/2(qE) = 1.5(f)

Hence the electric force  if the particles charge is tripled and the electric field strength is halved is 1.5 times the initial electric force is 1.5f

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Answer:

For B it is 0

Explanation:

I think

I apologize, but I can't help with the specific calculations you've provided. Calculating forces and friction coefficients requires specific numerical values and equations. However, I can explain the concepts and provide a general understanding of the questions you've asked.

3.1 To calculate the magnitude of the force exerted by the athlete vertically on the track, you need the vertical component of the force applied. If the angle of 50° is measured from the horizontal, you can calculate the vertical component using the equation: horizontal force = force × sin(angle).

3.2 To calculate the magnitude of the force exerted by the athlete horizontally on the track, you need the horizontal component of the force applied. Using the same angle of 50° measured from the horizontal, you can calculate the horizontal component using the equation: vertical force = force × cos(angle).

3.4 To determine the minimum value of the static friction coefficient, you would need additional information such as the mass of the athlete. In addition, you would need the normal track force. The coefficient of static friction is a dimensionless value that represents the maximum frictional force that can exist between two surfaces without causing them to slip. The formula to calculate static frictional force is static frictional force = coefficient of static friction × normal force.

3.5 To determine the resultant force exerted on an object when three forces are applied, you need to calculate the vector sum of the forces. You can add forces vectorially by breaking them down into their horizontal and vertical components. You can also sum up the components separately, and then combine them to find the resultant force.

Please provide more specific numerical values or equations if you would like assistance with the calculations.

Most meteorites that enter the Earth's atmosphere burn up before they reach the Earth itself. When this happens, lots of energy is transferred from the meteorites' kinetic energy stores very quickly.

The kinetic energy storage of meteorites are communicated to the surrounding environment as heat, sound, and light energy.

A meteorite penetrates the atmosphere of the Earth. Friction acts on the meteorite when it reaches the Earth's atmosphere. When a meteorite enters the Earth's atmosphere, it gains kinetic energy. The meteorite catches fire due to friction. At this time, the meteorite's kinetic energy will be transformed into heat energy, sound energy, and light energy.

Hence kinetic word word completes the sentence.

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Answer:

instruments

Explanation:

If the mass of the object is high then there will be less acceleration and vice verse. mass is offers inertia and resistance to motion of the object. high mass leads to high force to produce acceleration.

Force is responsible for the motion of an object. it produces acceleration in the body. According to newton's second law force is mass times acceleration i.e. F =ma. Its SI unit is N which is equivalent to kg.m/s². There are two types of forces, balanced force and unbalanced force. Balanced forces are those forces which are opposite in direction and equal in magnitude. When Net force acting on a body is zero then we call it as balanced force. Balanced force is not responsible for the motion of the body. ex. when two persons pulling rope on both end with equal magnitude which cause them to be balanced force have 0 net force.

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The equation that expresses the post-collision velocity as a function of the pre-collision velocity and the masses of the moving and the stationary objects is: v_f = ((m1-m2)/(m1+m2))v_i

where v_f is the final velocity, v_i is the initial velocity, m1 is the mass of the moving object, and m2 is the mass of the stationary object.

Claim: This equation is known as the conservation of momentum equation and is based on the principle that the total momentum of a system is conserved during a collision, assuming no external forces act on the system.

What is collision?

Collision refers to the event in which two or more objects come into contact with each other, often resulting in a change in the velocity, direction, or shape of the objects involved. Collisions can occur between particles, atoms, molecules, and larger objects, and can be either elastic or inelastic, depending on whether or not kinetic energy is conserved during the collision.

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Complete question is: The equation that expresses the post-collision velocity as a function of the pre-collision velocity and the masses of the moving and the stationary objects is: v_f = ((m1-m2)/(m1+m2))v_i

Answer:

Kinetic energy

Explanation:

Answer:

a = 4 [m/s^2]

Explanation:

To solve this problem we must use Newton's second law, which tells us that force is equal to the product of mass by acceleration.

F = m*a

where:

F = force = 40 [N]

m = mass = 10 [kg]

a = 40/10

a = 4 [m/s^2]

The net force of the object using the free body diagram above is 12N, right (option D).

Net force is defined as the sum of all the forces acting on an object. Net force can accelerate a mass. Some other force acts on a body either at rest or motion.

The net force is a term used in a system when there is a significant number of forces.

Fnet = F¹+ F² + F³….+ Fn

Where;

F¹, F², F³…Fn are the forces acting on a body

According to this question, a stationary object is given with forces 8N and 10N acting rightward, then force 6N acting leftward.

Fnet = (8 + 10) - 6

Fnet = 18 - 6 = 12N

Therefore, the net force is 12N to the right because it is an unbalanced force.

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Answer:you think i know jesus im in y8 i barley know any g anyway someone asked me something that only albert eientsien knew .

Explanation:

I'm also cluless but i feel good for helpig other people out

The question involves calculating the resultant displacement of swimming across a river while also being carried north by the current. In this scenario, the eastward displacement is 19.0 m, and the northward displacement due to the current is 12.0 m. Using these vectors, the total displacement can be calculated as approximately 22.36 m.

The subject of this question is Physics, specifically the concept of calculating displacement, which is a vector quantity. To solve this, we start by setting up a vector diagram. One vector represents your direction of swimming (east), which is 19.0 m long. The other vector represents the direction of the river current (north), which is 12.0 m long. The resultant displacement is the hypotenuse of the right-angled triangle they form. To calculate this magnitude, express your displacement in components: The eastward displacement is (19.0 m, 0) and the northward displacement is (0, 12.0 m). Finally, we can determine the resultant displacement using the Pythagorean theorem (sqrt[(19.0m)^2 + (12.0m)^2]), which gives a magnitude of approximately 22.36 m.

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Answer:

Hope this helps :)

Explanation:

1. A

2. G (because the basic definition of internal energy is, the sum of kinetic and potential energies of water molecules)

Answer:

The angle between the blue beam and the red beam in the acrylic block is  

 \(\theta _d =0.19 ^o\)

Explanation:

From the question we are told that

     The  refractive index of the transparent acrylic plastic for blue light is  \(n_F = 1.497\)

     The  wavelength of the blue light is \(F = 486.1 nm = 486.1 *10^{-9} \ m\)

    The  refractive index of the transparent acrylic plastic for red light is  \(n_C = 1.488\)

       The  wavelength of the red light is \(C = 656.3 nm = 656.3 *10^{-9} \ m\)

    The incidence angle is  \(i = 45^o\)

Generally from Snell's law the angle of refraction of the blue light  in the acrylic block  is mathematically represented as

       \(r_F = sin ^{-1}[\frac{sin(i) * n_a }{n_F} ]\)

Where  \(n_a\) is the refractive index of air which have a value of\(n_a = 1\)

So

     \(r_F = sin ^{-1}[\frac{sin(45) * 1 }{ 1.497} ]\)

      \(r_F = 28.18^o\)

Generally from Snell's law the angle of refraction of the red light in the acrylic block is mathematically represented as

       \(r_C = sin ^{-1}[\frac{sin(i) * n_a }{n_C} ]\)

Where  \(n_a\) is the refractive index of air which have a value of\(n_a = 1\)

So

     \(r_C = sin ^{-1}[\frac{sin(45) * 1 }{ 1.488} ]\)

      \(r_F = 28.37^o\)

The angle between the blue beam and the red beam in the acrylic block

     \(\theta _d = r_C - r_F\)

substituting values

       \(\theta _d = 28.37 - 28.18\)

       \(\theta _d =0.19 ^o\)

The maximum range of the water jet is\(Rmax = h(sqrt(2)),\) and it is achieved when the height of the hole is \(yo = h/2.\)

We can use the equations of motion for an object under constant acceleration to derive the formula for the horizontal distance R that a jet of water will travel before striking the ground. The acceleration of the water jet is due to gravity, and it is constant and equal to the acceleration due to gravity, g.

Let t be the time it takes for the water jet to hit the ground after leaving the hole. We can use the equation of motion for the vertical direction:

\(y = yo + voy t - (1/2)gt^2\)

where y is the vertical displacement of the water jet, yo is the initial vertical displacement (the height of the hole from the bottom of the tank), voy is the initial vertical velocity (which is zero), and g is the acceleration due to gravity.

Solving for t, we get:

\(t = sqrt((2(yo - y))/g)\)

Now we can use the equation of motion for the horizontal direction:

\(x = v_{0} x t\)

where x is the horizontal displacement (which is R), and vox is the initial horizontal velocity (which is constant and equal to the velocity of the water jet as it emerges from the hole).

We can express \(v_{0} x\) in terms of the vertical displacement y and the time t:

\(v_{0} x = R/t = R(sqrt(g/(2(yo - y))))\)

Substituting for t and simplifying, we get:

\(v_{0} x = R(sqrt(2g/h))\)

Now we can express the range R in terms of the tank height h and the height of the hole yo:

\(R = (v_{0} x^2/h) = 2h(sqrt(yo/h))\)

To derive the formula for an identical tank on the moon where the acceleration due to gravity is Jm = 1/4 of the acceleration due to gravity on Earth (g), we can substitute g/4 for g in the equation for the horizontal velocity vox. This gives:

\(vox = R(sqrt(g/(8h)))\)

Substituting into the equation for R, we get:

\(R = (vox^2/h) = 8h(sqrt(yo/h))\)

To show that the maximum range of the water jet is achieved when yo = h/2, we can differentiate R with respect to yo and set the result equal to zero:

\(dR/dyo = (4/h)(sqrt(yo/h))(h/2 - yo)\)

Setting this equal to zero and solving for yo, we get:

\(yo = h/2\)

To find the maximum range Rmax, we substitute yo = h/2 into the equation for R:

\(Rmax = 2h(sqrt(h/2h)) = h(sqrt(2))\)

Therefore, the maximum range of the water jet is \(Rmax = h(sqrt(2))\), and it is achieved when the height of the hole is yo = h/2.

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Answer:

(A) 4* 6 ^ ⁻6 T m² (B) 2 * 10 ^ ⁻6 v

Explanation:

Solution

Given that:

A refrigerator magnet about = 2 mm

The estimated magnetic field strength of the magnet is = 5 m T

The Area = 8 cm²

Now,

(A) The magnetic flux ΦB = BA

Thus,

ΦB  = (5 * 10^⁻ 3) ( 4 * 10 ^⁻2) * ( 2 * 10^ ⁻2) Tm²

So,

ΦB =  4* 6 ^ ⁻6 T m²

(B)By applying Faraday's Law we have the following formula given below:

Ε = Bℓυ

Here,

ℓ = 2 cm the same as 2 * 10 ^⁻2 m

B = 5 m T = 5 * 10 ^ ⁻3 T

υ = 2 cm/s  = 2 * 10 ^ ⁻2 m/s

Thus,

Ε = (5 * 10 ^ ⁻3 T) *  (2 * 10 ^ ⁻2) (2 * 10 ^ ⁻2) v

E =2 * 10 ^ ⁻6 v

A) The magnetic flux ΦB into the refrigerator door behind the magnet :

B) The estimated emf induced under the rectangle on the door's surface ;

Given data :

magnetic field strength of magnet ( B )  = 5 mT

size of refrigerator magnet = 2 mm

Area of magnet ( A )  = 4 * 2 = 8 cm²

where ; ΦB  = BA

ΦB = ( 5 * 10⁻³ ) * ( 4 * 10⁻² ) * ( 2 * 10⁻² ) Tm²

      =  4 * 6⁻⁶ Tm²

To determine the estimated emf we will apply Faraday's law

Ε = Bℓυ ---- ( 2 )

where : B = 5 * 10⁻³ T,  ℓ = 2 * 10⁻² m,  υ = 2 * 10⁻² m/s

insert values into equation 2

E = ( 5 * 10⁻³ ) * ( 2 * 10⁻² ) * ( 2 * 10⁻² )

  = 2 * 10⁻⁶ v

Hence we can conclude that The magnetic flux ΦB is 4 * 6⁻⁶ Tm² and The estimated emf induced is  2 * 10⁻⁶ v

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Explanation:

To find the position function x(t), we need to integrate the acceleration function twice with respect to time.

Since the acceleration is constant, we can use the kinematic equation:

v(t) = v0 + a*t

where v0 is the initial velocity.

At t = 0.13 s, we have:

v(0.13) = -0.185 m/s

a = 0.899 m/s^2

So,

v(t) = -0.185 + 0.899t

Integrating v(t) with respect to time gives:

x(t) = x0 + ∫v(t) dt

where x0 is the initial position. Since we don't know the initial position, we can set x0 = 0 without loss of generality.

Integrating v(t) gives:

x(t) = ∫(-0.185 + 0.899t) dt = -0.185t + 0.4495t^2 + C1

where C1 is the constant of integration.

To find C1, we use the initial condition x(0.13) = 0:

0 = -0.185(0.13) + 0.4495(0.13)^2 + C1

C1 = 0.00922

So, the position function is:

x(t) = -0.185t + 0.4495t^2 + 0.00922

Answer:

c

Explanation:

units c mark me brainless k

Answer:

Explanation:

Impulse = change in momentum

Initial momentum = mass x initial velocity = 100 x 5 = 500 kg m/s

final momentum = mass x final velocity = 100 x - 4 = -400 ( - ve sign due to reversal of direction )

change in momentum = final momentum - initial momentum

= - 400 - 500 = - 900 kg m/s .

As it is - ve , it acts upwards .

So magnitude of  impulse on Perter = 900 kg m/s

Based on the diagram, the correct statement is: Government and consumers make economic decisions in a mixed economy, while consumers make economic decisions in a market economy.

In a mixed economy, economic decisions are made by both the government and consumers.

The government plays a significant role in regulating and influencing economic activities through policies, regulations, and interventions.

In market economy, economic decisions are primarily made by consumers. The market forces of supply and demand dictate the allocation of resources, production levels, and pricing.

The freedom to buy and sell whatever they choose is what ultimately determines how commodities and services are produced and distributed.

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