the direction of the force of sliding friction is always select one to that of velocity of the object and is select one static friction. State True or False your answer:
a. True
b. False

It is supposed to be replicated by another researcher and provide similar results  predict future behaviors  proves the research hypothesis.

This is because, an experiment is considered reliable if different researchers repeats it and even then get the same or a similar answer over and over again. So, it suggests that the experiment is reliable, when it tends to give the same result when other researchers repeat the entire experiment.

An explanation for a phenomenon is offered in the form of a hypothesis, or hypotheses. According to the scientific method, a hypothesis must be testable in order to qualify as a scientific hypothesis. Typically, scientists base their hypotheses on prior observations that leave room for doubt on the validity of the existing body of knowledge. A scientific theory is different from a scientific hypothesis, despite the fact that the terms "hypothesis" and "theory" are frequently used interchangeably. In a process that starts with an educated guess or notion, a working hypothesis is a hypothesis that has been accepted provisionally and is offered for additional study.

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The magnetic energy that is created around the inductor is where this energy is actually kept. Again, think about the circuit we created with two coils wound on base of one another.

The electrical energy is created by the motion of negative charge to and fro and this flow of electrons create electrical energy.

Given,

sum of magnetic and electric energy = 0.800 J

Capacitor charge = 5.50 mc

Current = 8 A

V = 10

Capacitance = 8 * 10 = 80

Therefore the capacitance of the energized capacitor is 80 F

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The horizontal and vertical components of the velocity are 41.1 m/s and  389 m/s respectively.

The initial velocity of the projectile = 40.9 m/s

The angle of elevation = 6°

The horizontal and vertical components of the velocity can be found using the formula,

                 Horizontal component, cosθ = v/vₓ

                 Vertical component , sinθ = v/vₙ

where θ is the angle of the elevation

           v is the initial velocity

           vₓ and vₙ are horizontal and vertical components of the velocity respectively.

Let us substitute the known values in the above equation. We get

Horizontal component:

                  cos 6° = v / vₓ

                     0.961 = 40.9 / vₓ

                        vₓ = 40.9/0.995

                            = 41.1 m/s

Vertical component

                   sin 6° = 40.9 / vₙ

                  0.105  = 40.9 / vₙ

                         vₙ = 40.9 / 0.105

                             = 389 m/s

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Plae A is flying at 350mph in the northeast direction relative to the earth, meanwhile plan B is flying at 460mph in the north direction. Plane B is observed as it is flying in the northwest direction as observed from plane A.

When the two planes are flying, the speed of the objects are measured relatively to the sureface of the earth are the actual speed of the object.

To solve this case, we will use the relative velocity concept. The relative velocity defines the velocity of an object relative to another object. In this case, we want to know the velocity of Plane B relative to Plane A.

To find the relative velocity of plane B to plane A,we could use formula:
v(BA)² = v(B)² + v(A)² - 2.v(A).v(B).cos45°

where:

v(BA) = velocity of plane B relative to plane A

v(B) = actual velocity of plane B

v(A) = actual velocity of plane A

cos45° = cos of the angle between plane B and plane A's direction

Using the information given, we found that:

v(BA)² = 460² + 350² - 2(460)(350).cos45°

v(BA) ²= 106,411

v(BA) = 326.21 mph

Plane B will be seem as flying with 326.21mph to northwest direction relative to plane A.

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Interview refers to an official face-to-face meeting of monarchs or other important figures.

It can also be a conversation in person (or, by extension, over the telephone, internet etc.) between a journalist and someone whose opinion or statements he or she wishes to record for publication, broadcast etc.

One importance of interview, which research has successfully pinpointed, is the control of facial expressions such as smiling gestures, posture etc.

360 degree feedback is an evaluation system or process in which employees receive confidential, anonymous feedback from the people who work around them. This typically includes the employee's manager, peers, and direct reports.

The 360 degrees Performance Appraisal method was first used in the 1940s. The 360 method provides each employee the opportunity to receive performance feedback from his or her supervisor, peers, staff members, co-workers and customers in an anonymous fashion.

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Both the balls hit the ground at the same time.

A body is said to be in freefall when it only moves in relation to the Earth's gravity. An external force exerted on the ball will cause its motion to accelerate. Gravitational acceleration is another name for this rate of free fall.

Due to the fact that the horizontally thrown ball's vertical motion is fully independent of its horizontal motion, both will strike the ground at the same time. As a result, both balls appear to be dropped and descending vertically at the same time in terms of vertical motion.

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So, the equilibrium temperature after the first object mixed with second object is approximately 53.3°C.

Hi! I will help you to solve Black's Principle. Black's Principle state that the heat absorbed by one object is always similar to the heat released by another. So, these objects will transfer heat into each other until they reach an equilibrium temperature. Usually, Black's principle used to find the equilibrium temperature after the interaction of two objects with the same masses but different types, with the same type but different masses, or different types and masses. The type of objects will affect the heat absorbed or released because each type has its specific heat characteristics (c).

So, mathematically Black's Principle can be expressed in the following equation:

[tex] \sf{\bold{Q_1 = Q_2}}[/tex]

[tex] \boxed{\sf{\bold{m_1 \cdot c_1 \cdot (T_1-T') = m_2 \cdot c_2 \cdot (T'-T_2)}}}[/tex]

With the following condition:

[tex] \sf{m_1 \cdot c_1 \cdot (T_1-T')= m_2 \cdot c_2 \cdot (T'-T_2)}[/tex]

[tex] \sf{1 \cdot \cancel c \cdot (80-T')= 2 \cdot \cancel c \cdot (T'-40)}[/tex]

[tex] \sf{80 - T'= 2T' - 80}[/tex]

[tex] \sf{-3T'= -160}[/tex]

[tex] \sf{T'= \frac{-160}{-3}}[/tex]

[tex] \sf{\bold{T' \approx 53.3^\circ C}}[/tex]

So, the equilibrium temperature after the first object mixed with second object is approximately 53.3°C.

The minimum speed that the bucket must swing so that the bucket does not come crashing down at the top of its loop is v = [tex]\sqrt{rg}[/tex]

Fc = Fg

mac = mg

ac = g

ac = v^2/r

v^2/r = g

The pace at which the distance a moving item travels changes is measured as speed. Since speed is a scalar, it has magnitude but no direction as a unit of measurement.

Speed is the rate at which anything moves over a predetermined distance.

an object that moves quickly and with high speed, covering a lot of ground in a short time. A slow-moving object with a low speed, on the other hand, covers a comparatively short distance in the same amount of time. An item with zero speed is stationary.

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Electron are basically discrete particles.

Electron is a type of particles that from all atoms.

Discrete orbits are those of  orbits where electrons to  remain stable. As long as, electrons remain in these are  orbits, they do not radiate by  energy. Discrete orbits are also known as energy shells and energy levels.

Quantization of orbital by the energy is caused by to the  wave nature of matter. Allowed orbits in atoms by  occur for constructively interference of electrons in to the orbit, requiring is an integral number of to the  wavelengths to fit in to the  orbit's circumference; that of  is, nλn=2πrn(n=1,2,3,...), where λn is the electron's to through the de Broglie wavelength.

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The normal force applied by the table onto the gingerbread man is 1.96 N.

The normal force is a type of force that is felt when a surface pushes against an object that is placed on that surface.

In other words, a normal force is a type of force directed opposite to the weight of an object. The normal force of an object is always directed upwards while the weight of the object is directed downwards.

According to Newton's third law of motion, the magnitude of the normal force of an object acting upwards is always equal to the weight of the object acting downwards.

The normal force applied by the table onto the gingerbread man is calculated as follows;

Fn = mg

where;

Fn = 0.2 kg  x  9.8 m/s²

Fn = 1.96 N

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A mass-containing crate must stop with a net effort of 24.63 joules.

When a physical influence called force is imparted to an item, the object accelerates in the direction the force was applied from. The amount of matter that makes up an object is expressed by its mass, which is expressed in kilograms. The rate at which an object's velocity along the same straight line as the unbalanced force changes is known as its acceleration.

Force and Mass

According to the question,

Mass, m = 72 kg

Speed, v = 1.89 m/s

Acceleration due to gravity, g = 9.8

We know,

The force, F = mg

By substituting the values,

       = 72×1.89

      = 136.08 N

By using Equation of motion,

v² = u² + 2gS

(1.89)² = 0 + 2ₓ 9.81 S

3.57 = 19.62 S

S = 3.57 / 19.62

S = 0.181 m

hence,

The work done (W) will be:

= F × S

= 136.08 ₓ 0.181

= 24.63 joule

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H2O molecules have a latent heat of 124976.7 J/mol when expressed in joules. This is comparable to about 124976 electron volts. 7 J/mol equals 7.2 1020 eV.

When an electron accelerates in an electromagnetic current created by a one volt potential difference, it gains kinetic energy, which is measured in electron volts.

The meaning of an electron energy (eV) is The amount of kinetic energy that an electron gains or loses when it goes from rest across a potential of one volt is known as an electron or electron-volt. Energy is measured in electron volts. 1.602176634 10-19 J is the equivalent of one electron volt.

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Stippling is a cutaneous condition brought on by unburned gunpowder fragments. Stippling cannot be removed with water, in contrast to other things that may be deposited on the skin, such as soot. Stippling suggests that when the gun was discharged, it was less than two feet from the victim's body.

Stippling in gunfire is what?

Stippling is the term used to describe the occurrence of numerous punctate skin abrasions brought on by foreign objects contacting the skin's surface. 1. Gunpowder tattooing, also known as gunpowder stippling, refers especially to stipple marks left behind by gunpowder when it leaves a gun.

What does forensic stippling mean?

Stippling is the term used in forensic science to describe a pattern of gunshot wounds left on the skin as a result of being in close contact to a discharged weapon. Stippling is a technique used in gunsmithing to engrave designs on the grip of a firearm to increase friction and provide a more secure grip.

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A certain brand of freezer is advertised to use 880 kW*h of energy per year, thus values are:

(A) P = 401.82 W

(B) K = 10.26

(C) m = 35.52 kg

Both a thermal Carnot efficiency and a Carnot coefficient of performance exist. The temperatures of the system's hot and cold reservoirs affect its maximum coefficient of performance.

(A)

Use the relation between power and energy to calculate the require power to operate engine.

The required power for the freezer to operate is:

P = E/t

E = Energy and t = time

The freezer operates for 6 h each day, and then in 1 year, the freezer operates for a time period is:

t = (365 days) × (6 h /1 day)

or, t = 2190 h

Thus, P = E/t

or, P = (880 Kw.h/ 1 year) × (10³ W / 1 KW) × (1 year/2190 h)

or, P = 401.82 W

Therefore, the required power is: 401.82 W

(B)

The theoretical maximum performance co-efficient is:

K = T(C) / [T(H) - T(C)]

or, K = (-6°C +273)/[(20°C + 273) - (-6°C +273)]

or, K = 267 K / 293 K - 267 K

or, K = 10.26

Therefore, the theoretical maximum performance co-efficient is: 0.26

(C)

The heat needed to make 1 kg ice is:

Q = m×[c(water)]×ΔT +mL

Here, specific heat of water [c(water)], heat of fusion of water L.

Q = m×[c(water)]×ΔT +mL

or, Q = (1 kg) × (4190 J/kg.K) × (293K - 273K) +  (1 kg) × (334 × 10³ J/Kg)

or, Q = 417800 J

The heat of removal is,

Q(removal) = WK

or, Q(removal) = PtK

or, Q(removal) = (401.82 W) × (3600 sec) × (10.26)

or, Q(removal) = 14841623.52 K

Mass of the ice is,

m = Q(H) /Q

or, m = 14841623.52 Ws / 417800 J

or, m = 35.52 kg

Therefore, the mass of the ice is: 35.52 kg

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The angle for third order maximum is [tex]0.481^{\circ}[/tex] .

Given that, wavelength of yellow light is 605-nm. Distance between the slits on which the light is falling is 0.105 mm.

The angle for the the third order maximum can be calculated by the formula given below.

[tex]m \lambda=2 d \sin \theta[/tex]

where, λ  is the wavelength of light,  is the distance between the slits and  is the order of diffraction.

For the third order,[tex]m=3[/tex].

Substituting the values in the above formula, we get the angle for the third order maximum.

[tex]\begin{aligned}& 3 \times 605 \times 10^{-9}=2 \times 0.105 \times 10^{-3} \times \sin \theta \\& \sin \theta=\frac{3 \times 605 \times 10^{-9}}{2 \times 0.105 \times 10^{-3}}\end{aligned}[/tex]

Simplifying the above equation as,

[tex]\begin{aligned}& \sin \theta=0.0084 \\& \theta=\sin ^{-1}(0.0084) \\& \theta=0.481^{\circ}\end{aligned}[/tex]

Hence, the angle for third order maximum is [tex]0.481^{\circ}[/tex].

What is the wavelength?

A quality of a wave that is the distance between similar points between two continually waves is called wavelength.

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The speed of a wave with a wavelength of 3m and frequency of 450Hz is  1350 meters per seconds.

Wavelength is simply the distance over which the shapes of waves are repeated. It is the spatial period of a periodic wave.

It is expressed as;

λ = c ÷ f

Where c is speed, f is frequency and λ is wavelength.

Given the data in the question;

Plug the given values into the above formula and solve for speed v.

λ = c ÷ f

c = λ × f

c = 3m × 450s⁻¹

c = 1350 ms⁻¹

Therefore, the speed of the wave is 1350m/s.

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A final velocity is a speed at which an object is moving after having gone through an acceleration over some time.

Given;

mass of the package, m₁ = 10 kg

mass of the cart, m₂ = 25 kg

initial velocity of the package, u₁ = 3 m/s

initial velocity of the cart, u₂ = 0

let the final velocity of the cart = v

(a) Apply the principle of conservation of linear momentum to determine common final velocity for ineleastic collision;

m₁u₁  + m₂u₂ = v(m₁  +  m₂)

10 x 3   + 25 x 0   = v(10  +  25)

30  = 35v

v = 30 / 35

v = 0.857 m/s

(b) the impulse experienced by the package;

The impulse = change in momentum of the package

J = ΔP = m₁v - m₁u₁

J = m₁(v - u₁)

J = 10(0.857 - 3)

J = -21.43 kg.m/s

the magnitude of the impulse experienced by the package = 21.43 kg.m/s

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The correct option is B. A bow wave is produced while a pace boat moves faster than the waves.

In regular use and in kinematics, the velocity (generally known as v) of an object is the value of the trade of its function over time or the magnitude of the trade of its function consistent with a unit of time; it is, for this reason, a scalar amount. The common speed of an object in a c programming language of time is the distance traveled by using the object divided by means of the length of the c programming language; the on-the-spot speed is the restriction of the common velocity as the duration of the time c language processes 0. velocity isn't always similar to pace.

Pace denotes only how rapidly an object is moving, while pace describes how speedy and wherein path the item is transferring. If a vehicle is said to travel at 60 km/h, its velocity has been distinctive. however, if the automobile is stated to move at 60 km/h to the north, its velocity has now been designated.

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The acceleration of the truck is 0.85 m/s².

The acceleration of the truck in vector form is → 0.85 m/s²

The acceleration of the truck is determined as follows;

Acceleration = Total force/mass of truck

The total force acting on the truck is the net force

The net force = mg sinθ

where

θ is the angle = 5°

Net force = 3000 * 9.8 * sin 5°

Net force = 2562.4 N

Acceleration = 2562.4 / 3000

Acceleration =  0.85 m/s²

The vector form of the acceleration will be → 0.85 m/s².

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4.92s is the time, it takes for the car to stop.

60.47m is stopping distance, also called as deceleration.

Deceleration is acceleration that takes place opposite to the direction of velocity. Here velocity always decreases.

Kinematic is study of motion without considering physical properties and forces acting on them. Kinematic equation deals with variables that are associated with kinematic namely, displacement, time, velocity and acceleration.

Thus to calculate time and deceleration, kinematic equation is used.

a) From question vi=55mph = 24.6m/s and f=5.0m/s²

Therefore, vi-vf/f =t

t=24.6-0/5

t=4.92s

Thus, tie required to stop the car is 4.92s

b) Δx = vf²-vi²/2a

where vf= 0m/s (final speed)

vi= 55mi/h ≈ 24.59m/s (initial speed)

a=-5m/s² (deceleration)

Δx=0²-25.59²/-2.5≈60.47m

Thus, 60.47m is the stopping distance

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The passage of ions through a potential difference V accelerates them. Parallel plates are connected by a voltage, and tiny amounts of ions are then injected into the space between them, close to the plate that already has a charge of the same sign as the ions.

Using a bending magnet, the magnetic sector mass spectrometers: The ions or atoms are forced to bend when they enter the magnet, and the light ions bend more sharply than the heavy ions. As a result, they are separated into a spectrum, like a rainbow.

Dempster's spectrometer only used a magnetic field to deflect the ion beam in a 180° arc. In Dempster's device, an ion beam that was homogeneous in mass and energy but diverging from a slit could be brought to a direction focus.

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Answer:

Move the magnet through loops of wire.

Explanation:

See person? that wasn't so hard its litteraly easier to put in an actual answer instead of all that spam.

One way to use a magnet to gather evidence that magnetic fields and electric currents have a causal relationship is to move the magnet through loops of wire that are present in the first option.

The relationship between magnetic fields and electric currents is known as electromagnetic induction. and electromagnetic induction states that a changing magnetic field induces an electric current in a nearby conductor, and a changing electric current induces a magnetic field around the conductor, and this relationship is the foundation for the operation of many electrical devices, such as generators, motors, transformers, and induction heaters, among others.

Hence, the correct answer is to move the magnet through loops of wire that is the first option.

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The fastest muscle contraction would be produced by a type IIb fibers.

Although Type IIB fibers are designed to produce ATP through anaerobic metabolic pathways, they can't provide enough ATP to the skeletal muscle fibers constantly and get tired quickly. have a rapid contraction velocity and ATP production. The muscles of the arms include a lot of these fibers. The "traditional" fast-twitch muscle fibers that are best at delivering short, intense bursts of speed are those that produce energy through anaerobic metabolism.

That type IIB fiber, which predominates in tiny mammals, is absent in large mammals, including humans, is a significant distinction. The most fatigue-prone and quickly contracting subtype of fast fibers is Type IIB. For type II muscle fibers, there is a range of slow to high contraction speeds.

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A 1000 foot long by 100 foot broad coal barge is submerged in 12 feet of 60 degree water. Estimate the friction drag if the vehicle is being pulled at 12 mph. It is being dragged at a 5 ft/s speed.

What is  friction drag?

The water density of the barge's friction drag. In 60 feet of water, a coal barge that is 1000 feet long and 100 feet wide is submerged. It is being towed at a 12 mph speed. A flat-bottomed barge that was 80 feet long and 35 feet broad was submerged. A 1000 foot long by 100 foot wide coal barge is immersed in water that is 12 feet deep. It is being dragged at a 5 ft/s speed.

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The following kelvin temperatures to the Celsius and Fahrenheit scales:

[°F] = [K] × 9/5 - 459.67

[°C] = [K] -273

A) 400k

F = 260.33

C = 127

B) 95 k

F= -288.67

C = -178

C) 1.55*10^7K

F = 2.79 *10^7

C = 1.55*10^7

The Fahrenheit scale was first proposed by German physicist Daniel Gabriel Fahrenheit in 1724. Using a tube filled with mercury or alcohol, Fahrenheit used his three points to determine the scale. He set the point where water, ice, and ammonium chloride (a salt) are stable at his 0°F.

The Celsius scale or Celsius scale is a temperature scale based on the freezing point of water at 0°C and the boiling point of water at 100°C. The Fahrenheit scale is a temperature scale based on the freezing point of water at 32°F and the boiling point of water at 212°F. Fahrenheit is used primarily in the United States, while Celsius is used worldwide.

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Answer:

Explanation:

A wooden table with a mass of 10 kg was set on a wooden floor and pushed with a force of 10N to the table, however, it did not move due to friction.

Because the force of friction was greater than the force given to the object, it did not move.

To move the box, the force applied should be more than 10N

The accelaration is 15 ms.

Acceleration (a) is the reason that  change in velocity (Δv) over to the change in time (Δt).

represented by the equation to  a = Δv/Δt. This allows you to measure how fast velocity by the  changes in meters per second squared (m/s^2).

1 . Here the change in to the  velocity is (50-20) or 30 m/s

And the time interval by to  the 5

So acceleration is 30/5 or 6 ms^-2

2. Here the change is the  (40-10) or 30 m/s in time is the  interval is 2 second

So acceleration is 30/2 or 15 ms^-2.

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a concentric ring model in which social groupings are spatially organised in a hierarchy of rings. The upper class resides further away from the center, while the lower class is located closer to it.

The concentric ring model operates on the presumption that cultural content results from the incorporation of original ideas into the creation and/or presentation of music, text, and picture, and that these concepts originate in the fundamental artistic creativity spheres. Burgess' concentric ring model concept envisions growth occurring in a series of concentric rings surrounding the concentric ring model . According to Hoyt's sector model, economic expansion follows transportation corridors.

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The length of the pendulum (in m) is : 0.99m

Time period to reach from left most position to equilibrium position = 0.5s =t

Time period is defined as the time taken to complete one full oscillation

T = 0.5*4 = 2s

for sample pendulum

T = 2π[tex]\sqrt{\frac{l}{g} }[/tex]

2 = 2π[tex]\sqrt{\frac{l}{9.81} }[/tex]

l = 0.99m

The period of the pendulum does not depend on the mass of the sphere, only on the length of the chord. Two pendulums with different masses but the same length have the same period. Two pendulums of different lengths have different periods. A pendulum with a long string has a long period

A simple pendulum consists of a sphere (mass point) m suspended from a (massless) cord of length L and fixed at a pivot point P. When shifted to the initial angle and released, the pendulum swings back and forth in a periodic motion. Applying Newton's second law to a rotating system gives the equation of motion for a pendulum.

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The magnitude of current when a flat coil of wire consisting of 480 turns each with an  area of 70 cm, is positioned perpendicularly to a uniform magnetic field that increases its magnitude at a constant rate from -0.8 t to -0.75 t in 7.7 s. if the coil has a total resistance of 86  is 0.025 A.

Given that magnetic flux is expressed as = NBA in this situation,

we know that N = number of turns and B = magnetic field.

We now know that the rate of change in magnetic flux will cause EMF in the coil, hence A = area of the loop.

EMF = NBA db/dt

Now, enter all variables to calculate the induced

EMF: (480)(70 * 10-2). [(-0.75) -(-0.8)]

According to Ohm's rule, current equals EMF divided by resistance, hence I = 2.18/86

I = 0.025 A

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