A train is traveling at 30 m/s. How long does it take for the train to travel 60,000 m (60 km)?

A. 0.33h
B.0.5h
C. 33h
D. 0.56h

The magnitude of the electric field of the electromagnetic wave is E = 64.4 V/m

An electromagnetic wave is awave that does not require a medium to propagate

An electric field is a region in which the effect of an electric force is felt.

Since a nonsinusoidal electromagnetic wave like that described in section 32.2 has uniform electric and magnetic fields. the magnitude of the poynting vector for this wave is 11.0 W/m².

The magnitude of the poynting vector is given by

S = E²/μ₀c where

Since we require the electric field, making E subject of the formula, we have

E = √(Sμ₀c )

Given that S = 11.0 W/m²,

Substituting the value sof the variables into the equation, we have

E = √(Sμ₀c )

E = √(11.0 W/m² × 4π × 10⁻⁷ H/m × 3 × 10⁸ m/s)

E = √(44π × 3 × 10WH/s)

E = √(1320π WH/s)

E = √(4146.9 WH/s)

E = 64.4 V/m

So, the magnitude of the electric field is E = 64.4 V/m

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Kinetic friction from the primary axle bearing, reader pull bearing, aux. pully bearing. The reader makes a sound whilst it pushes against the platter causing strength to be in part launched.

The belongings of any rotating item given by means of second of inertia instances angular pace. it's far the property of a rotating frame given by way of the manufactured from the instant of inertia and the angular velocity of the rotating object. Angular momentum from time to time known as spin is decided through an item's mass, its pace, and how some distance the mass extends out from the factor of rotation.

Angular Momentum is defined because the assets of any rotating object are given by way of the made from the moment of inertia and angular velocity of the rotating item. it is a vector and has both importance and course. The not unusual examples of angular momentum are the rotation and revolution of Earth.

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The pH is equal to the pKa in a titration of acetic acid and sodium hydroxide that is halfway to equivalence point.

Because of the incomplete dissociation of the acid, the reaction is in equilibrium, with an acid dissociation constant, Ka, which is specific to that acid. point are the same. Therefore, at the halfway equivalence point, the pH is equal to the pKa.

Titration is the slow addition of one solution of a known concentration to a known volume of another solution of unknown concentration until the reaction reaches neutralization, which is often indicated by a color change.

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If A is a matrix, its projection onto its column space is always represented by the matrix P=A(AA)1A. This simplifies to AA in the scenario where A is orthogonal.

Orthogonal objects are connected by their perpendicularity to one another in Euclidean geometry. Lines of line segments that cross at a perpendicular angle are said to be connected orthogonally. Similar to this, two vectors are said to be orthogonal if they intersect at a 90-degree angle.

When two systems are orthogonal, they do not impact one another through interaction. At some point or junction, they come together, but other from that, neither system affects the other. Because of this independence, moving, testing, or changing things in one system does not affect components in the other system.

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Using the theories of electricity, we got that group should do first is to improve the design of the plan if a group  have decided that the amount of electricity used by the school should be reduced.

Electricity refers to  physical phenomena that should be connected with the presence and the motion of the matter that actually contain the electric charge property. It is related to the magnetism, also it should be the integral part of the electromagnetism.

Hence, when a group of students have decided that the amount of electricity used by the school should be reduced and  want to develop a plan to solve this problem, the group should do first  is that improve the design of the plan so that the problem should be solved.

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(Complete question) is:

A group of students have decided that the amount of electricity used by the school should be reduced and  the students want to develop a plan to solve this problem. What should the group do first? Select one: a. determine what materials should be used to implement the plan b. conduct research on energy conservation to form the plan c. improve the design of the plan d. test the validity of the plan

The reason why two permanent magnets attract is that they have opposite pole.

We know that a magnet has to do with an object that has its magnetic domains properly aligned in such a way that it can be able to attract other objects. We have to see here that a permanent magnet could have a north pole and a south pole.

Given that magnets that have different poles are going to attract because of the alignment of the magnetic domains in the both magnets, we can say that it is possible for two permanent magnets to attract.

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I do the work on paper with steps and attached it to the answer!

The oscilloscope is also known as scope CRO or DSO the latter is the modern one.

An oscilloscope is used to observe the continuously varying voltage signal. It helps us to measure the varying voltage signal apart from voltage it is also used to measure other signals like sound, vibration also observation but this signal is first converted into voltage and then displayed on an oscilloscope. However this drawback has been covered in the DRO which directly Shows you the result without any conversion.

The oscilloscope shows the voltage with respect to the time which means it captures the voltage signal for a particular time and then shows up the result it means for large where the voltage signal is frequently changing within a second oscilloscope is unable to read and that's why show as a non zero voltage. The energy transfer between the coil without any electrical connection is done by the principle of mutual induction.

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Answer:

-44.95N

Explanation:

electric force = kQ / r²

= 8.99×10^9 × -10.0×10^-6 / 20×10^-2 = -44.95N

hope it helps. :)

The charge accumulated at the boundary between the segments that carries 4 A current along a 1 mm diameter wire is 2.95 * [tex]10^{-18}[/tex] C

η = q / A

η = εo I / A [ 1 / σ1 - 1 / σ2 ]

η = Charge density

q = Charge

A = Area

σ = Conductivity

I = Current

εo = Vacuum permittivity

I = 4 A

εo = 8.85 * [tex]10^{12}[/tex] F / m

σ1 = 1 * [tex]10^{7}[/tex] / Ω m

σ2 = 6 * [tex]10^{7}[/tex] / Ω m

Equating both the formulae of charge density,

q / A = εo I / A [ 1 / σ1 - 1 / σ2 ]

q = 8.85 * [tex]10^{12}[/tex] * 4 ( 1 / [tex]10^{7}[/tex] - 1 / 6 * [tex]10^{7}[/tex] )

q = 8.85 * [tex]10^{12}[/tex] * 4 * [tex]10^{-7}[/tex] ( 1 - 1 / 6 )

q = 2.95 * [tex]10^{-18}[/tex] C

Therefore, the charge accumulated at the boundary between the segments is 2.95 * [tex]10^{-18}[/tex] C

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The maximum speed of the cycle is 21 m/s.

When the motorcyclist takes the curve on the hill, a net frictional force acts on it towards the center and acts as the centripetal force.

The radius of the hill is = 45 m

Also , the weight of the motorcycle acts downwards and the normal reaction acts upwards. As the motorcycle is on the curve so , a component of the weight acts towards the center.

weight is given by , W = mg

So the net F(friction)  = mg - N = [tex]\frac{mv^{2} }{r}[/tex]

For loosing contact,  N=0

[tex]v^{2}[/tex] = rg

v = [tex]\sqrt{rg}[/tex]

v = [tex]\sqrt{(45)(9.80)}[/tex]

v = 21 m/s

So the maximum speed of the motorcycle can be 21 m/s.

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There is no work done by the normal force because all of the work is being done by gravity. 

W=0 J where J is Joules.

Normal force is always perpendicular to the motion of the body, hence work done by normal force is zero.

Work done = force×d = Fdcos(Θ)  { cos(90) = 0 }

Work done = 0 J

As the box moves down the incline, the only force doing work on the box is the force of gravity. The weight of the box is mg and the inclined plane makes an angle theta with respect to the horizontal, so the force of gravity is mg × sin(Θ)

So the work done by gravity is

W=mg×sin(Θ)×d

where d is the distance the box travels down the incline. The normal force is perpendicular to gravity, so the work done by the normal force is

W=F×d×cos(90)=0

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Due to the brass weight's existence, the rod's torque about the pivot is 8.44 N.m.

A force that may rotate an object about an axis is known as a torque. In linear kinematics, force is what drives the acceleration of an object. The same is true for angular acceleration, which is caused by torque. Thus, torque can be seen as the rotating counterpart of force. The term "axis of rotation" refers to the straight line around which the item rotates.

Given parameters:

Mass of the brass weight, m= 1.5 kg.

Length of the rod, l = 1.5 m.

Angle with the vertical; θ =22.5⁰.

We have to find, the brass weight's presence causing  torque on the rod about the pivot; ζ = ?

Force applied by the brass weight; F = mass × acceleration due to gravity  = 1.5 × 9.8 N =  14.7 N.

So, the brass weight's presence causing torque on the rod about the pivot; ζ = Fl sinθ

= 14.7 × 1.5 × sin22.5° N.m

= 8.44 N.m.

Hence, the applied torque on the rod about the pivot is   is 8.44 N.m.

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A clay liner and a system of pipes is used in a sanitary landfill to

a) Prevent leakage

What is sanitary landfill ?

Sanitary landfill refers to the efficient use of engineering techniques to confine waste to the smallest practical area in order to cover it with a layer of soil to reduce its volume and minimize pollution. It is a land-based method of disposal without harming the environment and public health. of air.

A landfill is a place where waste is isolated from the environment until it is safe. It is believed to be completely biologically, chemically and physically degraded. High-income countries may have higher levels of isolation achieved.

A safe landfill has critical elements: a bottom liner, a leachate collection system, a cover, and a natural hydrogeological environment. The natural environment can be chosen to minimize the potential for waste to enter the groundwater below the landfill.

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The static friction value is the value from zero to the minimum force required to initiate motion. The formula for calculating static friction is:

Static Friction = Normal Force x Static Friction Coefficient.

The maximum or limit of friction between two surfaces is FMAX=μR F MAX = μR. where μ is the coefficient of friction and R is the normal reaction between two surfaces. The coefficient of friction is a measure of surface roughness, with rougher surfaces having higher values. Therefore, as the car makes a circular motion, the necessary centripetal force is provided by the frictional force. Therefore, the coefficient of static friction between a car tire and the road surface is 0.53.

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The motor in the platform works for W=1885J during this process.

The amount of energy expended when a force of one newton is applied across a displacement of one meter is known as a joule. A joule is equal to one watt of electricity emitted or lost over the course of one second. The British thermal unit (Btu) is sometimes used to express energy. the work- or energy-measurement unit derived from the SI. The energy required to accelerate a body with a mass of one kilogram over a distance of one meter using one newton of force is equal to one joule. Additionally, one joule is equal to one watt-second.

The energy required to exert one newton of force through one meter is measured in joules. For instance, the energy required to lift a one-kilogram object one meter is given by E = Fd = (ma)d = mgd = (1 kg)(9.8m/s2)(1 m) = 9.8 kg m/s2 = 9.8 joules.

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Cannon A reaches a higher elevation when two cannonballs, a and b, are fired from the ground with identical initial speeds, but with ua larger than ub.

Because elevation rises with increasing angle, Cannon A fires at a higher altitude. Finding the vertical velocity will yield the elevation. The velocity increases as the angle increases. Cannon A's elevation is higher than Cannon B's because the angle from which the projectile was fired from Cannon A was greater. Due to its higher elevation, Cannon A flies higher for a longer period of time. The formula for time is t = (2y)/g, meaning that the larger y is, the larger time will be. Cannon A is in the air for a longer period of time because elevation and vertical velocity affect time.

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Answer: 20 m/a

Explanation: 600/30=20

Every action has an equal and opposite response, according to Newton's Third Law.

Newton's Third Law of Motion is essential for rocket launch. Through action and reaction, a rocket engine generates thrust. Hot exhaust gases from the engine exit via the back of the engine. In response, the opposing reaction produces a propelling force.

Forces always act in pairs that are equal but opposite, according to Newton's third law of motion. Another way to put it is that there is an equal but opposing reaction to every action. In other words, when you push against a wall, the wall pushes back at you with a force equal to your own.

There is an equal and opposite reaction to every action, according to Newton's third law. The implication of the statement is that there are always two forces acting on the two interacting objects. The force acting on the first object is equal in size to the force acting on the second.

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The de Broglie wavelength (in nanometers) of an electron with a velocity of 2.5 x [tex]10^{6}[/tex] m / s is 0.29 nm

λ = h / m v

λ = Wavelength

h = Planck's constant

m = Mass

v = Velocity

v = 2.5 * [tex]10^{6}[/tex] m / s

m = 9.1 * [tex]10^{-31}[/tex] kg

h = 6.626 * [tex]10^{-34}[/tex] J s

λ = 6.626 * [tex]10^{-34}[/tex] / ( 9.1 * [tex]10^{-31}[/tex] * 2.5 * [tex]10^{6}[/tex] )

λ = 0.29 * [tex]10^{-9}[/tex] m

λ = 0.29 nm

De Broglie's equations describes that matter can act as waves just as light and radiation do. It also states that beam of electrons can also be diffracted like a beam of light

Therefore, the wavelength of the electron is 0.29 nm

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For the man to do the least work, the angle between the force and the horizontal should be 76.

Work is calculated as the force multiplied by the distance travelled in the direction of the force.

given that,

force, f = 100 N

Coefficient of friction, = 0.25

distance, d = 15 m

So, net force, F = force - Coefficient of friction

net force = 100 - 0.25 x m g

Work = (100 - 0.25 mg) x d cosθ

For minimum work, the angle should be maximum.

So, the value of angle θ is 76°.

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Yes. it means the object is slowing down.

Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity. Acceleration has to do with changing how fast an object is moving. Since acceleration is a vector quantity, it has a direction associated with it.

The direction of the acceleration vector depends on two things:

If an object is slowing down, then its acceleration is in the opposite direction of its motion.

In conclusion, If an object is not changing its velocity, then the object is not accelerating.

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The energy difference between the given shell while transactions between paschen series statement (energy differnce)ΔE = 1.30eV

The Paschen series is a collection of emission lines from atomic hydrogen gas caused by the descent of electrons from an electron shell with n > 3 to an electron shell with n = 3.

An electron moves from a higher state to the n = 3 shell in the Paschen series of the hydrogen atom.

Assume that the electron's starting state is n = 8.

Now to calculate the energy difference we use the following formula:

ΔE = (1/[tex]n^{2}[/tex]low − 1/[tex]n^{2}[/tex]high)13.6eV

According to the given data:

n high =8

n low=3

so putting value on the above formula

ΔE = (1/[tex]3^{2}[/tex]low − 1/[tex]8^{2}[/tex]high)13.6eV

ΔE =(0.095)13.6eV

ΔE = 1.30eV

So,The energy difference between the given shell while transactions between paschen series statement (energy difference)ΔE = 1.30eV

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Answer:

One can use conservation of momentum and energy and obtain the result that the velocity of separation in such a collision will be equal to the velocity of approach

Thus, after collision their speeds will be 3.20 and 1.90 m/s

They will exchange velocities in the collision

If they were approaching each other their relative speeds are

5.10 m/s w.r.t. each other

If they were going in the same direction before the collision their relative speeds before and after the collision are 1.3 m/s

The problem here implies that their relative speed before the collision is 5.10 m/s (traveling in opposite directions)

From of the following pairs, the form of radiation with the lower energy are

a.)microwaves or radio waves.

h.)AM radio waves or FM radio waves.

electromagnetic spectrum :

The electromagnetic spectrum is a collection of wavelengths, photon energies, and frequencies that extends frequencies.

gamma rays > X-rays > ultraviolet radiation >  visible light > infrared radiation > radio waves.

wavelength ∝ 1 / frequency

E = hf

where

E = energy

f = frequency

h = Planck’s constant

From of the following pairs, the form of radiation with lower energy are

a.)microwaves or radio waves.

h.)AM radio waves or FM radio waves.

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The action which I should take first is a)Stop the attack and contain the damage by disconnecting the system from the network. So correct option is a.

Many people actually rely on the Internet for many of their professional, social and the personal activities. But there are many people who attempt to damage our Internet-connected computers, violate our privacy and render inoperable the Internet services.

Given the frequency and the variety of existing attacks as well as the threat of new and more dangerous future attacks, network security has become a central topic in the field of computer networking.

Hence, correct option is a.

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(Complete question) is:

A security incident is currently occurring on the company network. You discover that the attack involves the computer system that is attached to the network. You're unsure what kind of the damage is being done to the network systems or data. Which of the following actions should you take FIRST?

a)Stop the attack and contain the damage by disconnecting the system from the network.

b)Continuously remain the network system in running state.

c)Try to introduce malware in attacker network system.

d)All of the above.

The angular frequency of the oscillation of the electromagnetic oscillations of the LC circuit is 16.66 rad/s.

The angular frequency of the electromagnetic oscillations in the given circuit is given by,

W = 1/√(LC)

Where,

W is the angular frequency,

L is the inductance of the inductor in the circuit,

C is the capacitance of the capacitor in the given circuit,

It is given that, LC circuit contains a 100-mh inductor, a 36.0-mf capacitor,

So, putting values,

W = 1/√(36 x 100x10⁻⁶)

W = 1/6x10⁻²

W = 16.66 rad/s.

So, the angular frequency is 16.66 rad/s.

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The amount of heat transferred is proportional to the temperature difference between the objects and the heat capacity of the object.

Warmness is based totally on the authentic story of Neil McCauley, a calculating criminal and ex-Alcatraz inmate who was tracked down by way of Detective Chuck Adamson in 1964. In 1961, McCauley was transferred from Alcatraz to McNeil, as mentioned in the film.

Considering the fact that Michael Mann's warmness got here out, he's been citing the film as a concept for the paintings he did inside the Dark Knight. Connections have been drawn among the visuals, the interrogation scene, and even solid member William Fitchner, who's in each movie.

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The net force acting on the box is [tex]23.37N[/tex]

What is Force?

Net Force = Difference between opposite direction forces.

Force acting on the box in north direction=[tex]1.05N+9.54N[/tex]

                                                                     =[tex]10.59N[/tex]

Force acting on the box in south direction=[tex]33.96N[/tex]

Therefore,Net force=[tex]33.96N-10.59N[/tex]

                                 =[tex]23.37 N[/tex].

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