Check all items that are a function of cerebrospinal fluid.
O Production of cranial glial cells
O Provides bouyancy to the brain
O Protects the brain from sudden movements
O Controls the chemical environment surrounding the brairn
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The acceleration of the eraser is 169.19 m/s².

A body travelling in a circle has centripetal acceleration. Due to the fact that velocity is a vector quantity (i.e., it has both a magnitude and a direction), when a body travels in a circle, its direction is continually changing, which causes a change in velocity, which results in an acceleration.

Given that angular velocity of the eraser: ω = 127 rpm

= 126×2π/60 radian/second

= 13.2 radian/second.

radius of the circle: r = 0.974 meter.

Hence, its centripetal acceleration is = ω²r

= 13.2×13.2×0.974 m/s²

=169.19 m/s².

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Technician A is right. A pressure plate with a diaphragm requires less pedal effort to operate than one with a coil spring.

A diaphragm clutch is a type of car clutch that uses a diaphragm spring to engage and disengage the clutch.

The structure of this clutch is very similar to that of a single plate clutch, with the exception of using Belleville springs instead of coil springs in the diaphragm. Because there are no release levers and the spring has multi-lever functionality, this clutch has more advantages. The spring's pressure is constantly changing. It rises until the spring is flat, at which point it begins to descend. Unlike a coil spring-type clutch, the driver of this clutch does not need to apply as much pedal pressure to keep the clutch from engaging.

Thus clutch plate pushes the friction plate onto the flywheel. The diaphragm spring is located on the plate on one side of the pressure.

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The steps of cycle of density of current :

1)Top layer of the ocean freeze , releasing salt

2) Warm less dense water flows towards the pole

3) Salty cold water sinks to the bottom of the ocean

4) Warmer water rises and mixes with less salty water

5)  At  the equator solar energy warms the water

Current density, which is measured in amperes per square meter, is the quantity of electric current flowing through a unit of cross-sectional area. The current density will increase as the conductor's current increases.

The measurement of the flow of electric charge through the cross-unit section's area in a certain amount of time. A vector quantity is the current density. It has magnitude and direction, thus. A/m2 is the S.I unit for current density, and it is represented by the letter J.

The amount of electric current passing through a material per unit of its cross-sectional area is known as its current density. Ampere/meter2 must be the SI unit for current density.

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(b) the photon because photons always travel through space faster than electrons. It depends on the relative mass of the electron and photon. In Bohr's model of atoms, the orbits where electrons move fastest have the lowest energy.

A photon is a discrete bundle (or quantum) of electromagnetic energy, often known as light energy. Photons have no mass, thus they move at the same rate as light (3 108 m/s). Each photon possesses the speed of light, or c, momentum (p = h v/c), energy (E = h), and momentum (p = h). Due to their electrical neutrality, photons are not affected by magnetic or electric fields. Radiation absorption or emission can result in the creation or destruction of photons.

The smallest elemental component of an atom, the electron has a negative charge. In a neutral atom, there are an equal number of protons and electrons. One electron and one proton are all that the hydrogen atom has.

Hence, (b) the photon because photons always travel through space faster than electrons. It depends on the relative mass of the electron and photon. In Bohr's model of atoms, the orbits where electrons move fastest have the lowest energy.

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C) Solar energy technology is now cheaper than conventional energy.

What is Solar energy ?

Solar energy is the heat and radiant light from the Sun that may be captured and utilized to produce electricity and solar thermal energy, respectively (which is used for applications such as water heating).

Solar energy is a source of energy that hasn't traditionally been used and is still being used today. It is therefore an unconventional source of energy. It is a renewable source of energy because it is limitless and unending.

According to Guggenheim analysts lead by Shahriar Pourreza, utility-scale solar is currently roughly a third less expensive than gas-fired power, while onshore wind is approximately 44% less expensive.

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Raul pushes a stalled car with a force of 204 N. The average power required to move the car is 157 Watt.

The average power is given by:

P = ΔF . s / Δt

Where:

P = power

ΔF = force changes over a time period Δt

s = distance

Parameters given in the problem:

ΔF = 204 - 44 = 160 N

s = 16.3 m

Δt = 16 s

Plug these parameters into the formula,

P = ΔF . s / Δt

P = 160 x 16 / 16.3

P = 157 Watt

Hence, the required power is 157 Watt.

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The main symmetry types are as follows. When all objects are mirrored about a central axis, reflection symmetry—also known as bilateral symmetry—occurs.

The symmetrical equilibrium found in nature is well represented by the human face. You would have two sides of your face with the exact identical pattern if you drew a line down the middle of it.

Asymmetrical balance is when a design appears balanced while having contrasting visual representations on either side. A design must have differential visual weight on either side in order to be deemed asymmetrical, yet those unequal visuals must balance one another.

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The velocity of the second ball after the collision is  2.8m/sec if both first and second  ball collide head-on a table.

We are given that there is no role of friction and collision is perfectly elastic, it means momentum conservation is possible.

Since, all collision is happening along a single axis. So, we assume all collision is happening in x-axis.

Now, we need to conserve momentum along x-axis which states that initial momentum of the system is equal to final momentum of the system.

Now, we know that momentum is given by the product of mass and velocity.

So, initial momentum of the first ball is =0.50×12=6.00kg-m/sec

initial momentum of the second ball is=0.75×(-16.0)= -12.00kg-m/sec

Final momentum of first ball is =0.50 × (-21.6)m/sec = -10.8kg-m/sec

Final momentum of second ball =0.75×vkg-m/sec

Therefore, 6+(-12) = (-10.8) +(0.75v)

=> -6 =-10.8+0.75v

=>0.75v=10.8-6

=>0.75v=4.8

=>v=4.8/0.75

=>v=2.8m/sec

Hence, velocity of second ball is 2.8m/sec.

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The dimension of acceleration is given by, [tex]m^{0} l^{1} t^{-2}[/tex], where m, l, t stand for mass, length and time respectively.

A dimensional equation is created when a physical quantity is expressed as its dimensional formula. The basic numbers [L] for length, [M] for mass, and [T] for time are used to define dimensional formulas in these three dimensions.

The characteristics of a system are quantified using physical quantities. These physical quantities are given significance by the combination of a generally recognised unit and a numerical value. For instance, while describing a beam's length, we may state that it is 6 [numerical quantity] + meters  [unit].

One crucial method for representing these systems in clear languages is through dimensional formulas. A few benefits come from using dimensional formulas to define derived units. It illustrates the representation of various physical quantities in terms of their fundamental units. It serves as a dimensional accuracy check for a derived quantity formula. It lessens errors that happen while translating between different systems' units (say from SI units to British units).

Derivation

We must obtain the formulas for displacement and velocity, two variables on which acceleration depends, in order to determine the dimensional formula for acceleration.

Dimensional Formula for Displacement

Change in position or movement is displacement, thus it is represneted by length.

[d] = [l]

This is also written as:

[d] = [[tex]m^{0} l^{1} t^{0}[/tex]]

This means that displacement has single dimension in length and no dimension in time and mass.

The dimension for displacement is [l].

Dimensional Formula for Velocity

Since velocity [v] is defined as a displacement with respect to time. This is represented as:

v = Displacement/Time

Since displacement [d] is given as [l] we have:

[v] = [l]/[t]

This can be further defined as:

[v] = [tex]lt^{-1}[/tex]

Finally concluded as:

[v] = [[tex]m^{0} l^{1} t^{-1}[/tex]]

The rate at which velocity changes over time is known as acceleration [a]. This is illustrative of:

[a] = Change in velocity/Change in time

Since we previously calculated velocity as [[tex]lt^{-1}[/tex]], acceleration is given as:

[a] =[tex][lt^{-1}]/[t][/tex]

This can be further condensed as follows:

[a]=[ [tex]lt^{-2}[/tex]]

This can also be stated as:

[a] = [[tex]m^{0} l^{1} t^{-2}[/tex]]

The dimensional formula for acceleration is displayed on the right side of the equation above. This dimensional equation states that acceleration has one length dimension, negative 2 of time dimensions, and no mass dimensions.

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50 kg skater will move 42 m to the ends of the pole starting from ice rink holding pole of length 15 m.

The mass taking into consideration all possible limitations for take-off including restrictions caused by Regulated Take-Off Mass and Regulated Landing Mass.

The load (or Mass) distributed over a defined area. Units of measurement used: SI: N/m2, kg/m2, Non-SI: psi, lb/ft2

The mass of an aircraft plus standard items such as unusable fuel, full operating fluids, fire extinguishers; emergency oxygen equipment.

Given,

Mass of skater one = 75Kg

Mass of skater two = 50Kg

Distance = 15m.

Assuming the system centre if mass does not change, both skaters would meet at the centre of the mass

let the 50kg skater be xm away from the centre, then, the 75kg skater would be (14 - x)m away from the centre too

m1x + m2(14 - x) = 0

m1x + 14m2 - m2x = 0

50x + 14*75 - 75x = 0

50x - 75x + 1050 = 0

-25x + 1050 = 0

25x = 1050

x = 42 m

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The wheel will take  0.207 seconds to turn through 110°.

Wheel is a circular object that rotates on an axis and is fixed under a vehicle or other object so that it can move easily on the ground.

one complete revolution = 2[tex]\pi[/tex] radian

one revolution = 6.28 rad

1° = [tex]\pi[/tex] / 180 radians

110° = 110 * ([tex]\pi[/tex] / 180) radians

110° = 1.92 radians

The wheel take 0.68 seconds to cover 6.28 radians.

Time taken by the wheel  to turn through 110°  = Time taken to cover 1.92 radians.

Using unitary method,

Since 6.28 radians require 0.68 sec

1.92 radians will require 'x' sec

x = (0.68 * 1.92) / 6.28

x = 0.207 sec

0.207 seconds does it take the wheel to turn through 110°.

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The number of turns in the secondary coil of the transformer is 13.

A transformer is a device that transfers electric energy from one alternating-current circuit to one or more other circuits, either increasing (stepping up) or reducing (stepping down) the voltage.

To calculate the numeber of turns in the primary coil of the transformer, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1nad solve for N

Hence, the number of turns is 13.

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Gravitational potential energy of block is 58.8  joules.

It is the potential energy which a massive object has in relation to another object due to gravitational force.It is the potential energy associated with gravitational field which releases when objects fall towards each other.It increases when two objects are brought far apart.

It is calculated by the formula,

PE=mgh

where m=masses of particle

R= distance between 2 objects

G= gravitational constant

In the given problem,formula PE=mgh  is used.

mass=2 kg

g=9.8m/s²

h= 3 m

Substituting values in equation

PE=2×9.8×3=58.8 J  

It is  the energy which is stored in the object due to its height above the ground.It depends on mass and height of body.

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The right response is B. a magnet with superconductivity. A superconducting magnet is a wire coil that is transporting current.

When describing how so much electricity flows through a wire and the way it flows in an electrical circuits, the term "electric current" is often employed.Amperes are used to measure it (A).The ampere number rises as more electricity flows through the circuit.

Image outcome The letter I is typically used to represent current. According to Ohm's equation, V = IR, the given flow through a conductor is dependent on the voltage V & resistance R. I = V/R is an alternate formulation of Ohm's law.

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If the pilot wanted to fly at the same flight mach number 2,200 ft above sea level then the corresponding flight velocity is 296.285 m/sec.

Velocity v is a vector, with units of meters per second. Velocity indicates the rate of change of the object’s position  i.e., velocity tells you how fast the object’s position is changing. The magnitude of the velocity indicates the object’s speed.

The direction of the velocity indicates the object’s direction of motion. The velocity at any point is always tangent to the object’s path at that point.

Thus, the velocity tells you how the object is moving. In particular, the velocity tells you which way and how fast the object is moving.

Given,

V = 484 Knote

V = 250.534 m/sec

Alitude = 43000+1 = Altitude =13.106 km

T= -54.59°C.

a)T= 218 48K.

then

C =[tex]\sqrt{KRT}[/tex]--------(1)

Substituting valves in (1)

C=[tex]\sqrt{K*284*218.43}[/tex]

C = 296.285 m/sec

then

M= V/c 250.534/296.285

M= 0.8455

b)V=140 knote

v = 72.02 m/s.

P = DRT

T = P/DR--------(2)

substituting all values in (2)

T = 101. 395 kpa/1.2 x 0.284

T = 101.395/ 0.3444

T = 294.207K

then,

c=343.82 m/s

m=v/c

m= 72.02/343.822

m= 0.2094

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13) Skinner was known for training animals in operant conditioning is False 14) Media violence and aggressive video games decrease viewers' level of emotional arousal is True, 15) The child shows discrimination towards the hot stove is False.

B. F. Skinner did use animals especially rats in his experiments but he was not interested in training them. He was interested in analysing behaviour and said that behaviour that is followed by pleasant consequences will likely be repeated and behaviour followed by unpleasant consequences is less likely to be repeated. This was called Law of Effect-Reinforcement by him i.e., the behaviour which is reinforced tends to be repeated and the behaviour which is not reinforced tends to die out. Watching violence through media or video games will arouse aggressive thoughts of person but are likely to decrease emotional empathy of the viewers for victims. Arousal of agressive thoughts need not necessarily be normal emotional arousal. This is actually called higher order conditioning. In this situation, a previously neutral stimulus becomes a conditioned stimulus after being compared repeatedly with a learned stimulus. On the other hand, discrimination is a tendency of an individual to differentiate between a conditioned stimulus and a similar stimulus, that won't result in unconditioned stimulus.

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2. The magnitude of the normal force exerted by the snow on the skis as the skier glides across the horizontal surface

Fn = 850N

Fg = Fn

3. The magnitude of the force of friction acting on the skis as the skier glides across the snowcovered, horizontal surface

Ff = μ . Fn

= 0.05 (850)

= 42.5 N

In physics, a force is a power that can change the motion of an item. A force can purpose an object with mass to alternate its pace. Pressure also can be described intuitively as a push or a pull.

A pressure is a push or a pull and it affects our each day lives because without force, people might not be capable of open and near stuff or lift up our arms or legs .

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2. The magnitude of the normal force exerted by the shown-covered, horizontal surface is

[tex]F_{g} = F_{N} = 850N[/tex]

3. The magnitude of the force of friction acting on the skis as the skier glides across the snow-covered, horizontal surface is

[tex]F_{f} = 42.5N[/tex]

A force is an external factor that can change the body's state of rest or motion. It has size and direction. The direction in which the force is applied is called the force direction, and the point at which the force is applied is called the force application point.

Frictional force is the force produced by two surfaces touching and sliding against each other. These forces are primarily affected by the surface finish and the amount of force required. The angle and position of the object affect the amount of frictional force.

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The minimum thickness of the oil slick at that spot is 313 nm.

The refractive index of the oil is 1.3,

Therefore, the interface between the two rays will give two stage change or zero stage change.

The position for the constructive interface :

[tex]2 n t=m \lambda[/tex]

Where, n = refractive index of oil

          m = order

So, for the minimum thickness (i.e. m = 1)

[tex]t_{\min }=\frac{\lambda}{2 n}[/tex]

[tex]t_{\min }=\frac{750}{2 \times 1.2}[/tex]

[tex]t_{\min }=313 \mathrm{~nm}[/tex]

What is The refractive index?

A primal physical property of a substance, it is usually used to identify a particular substance, confirm its chastity, or scale its concentration is called refractive index.

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Answer:

One force acts on the object

A situation is impossible in such a circumstance - one force acts on the object. Because when the object is moving at constant velocity it means net force is zero. If one force acts on the object, net force is always not a zero. All the other combinations (no forces, two forces, three forces … )could give a resultant force equal zero

a)  time, t = 11.407 s, b) distance   x = 175.66 m,  v = c)      speed    v = 30.80 m / s

a) This is kinematics exercise,  write the equation of each vehicle car is;-

 x = x₀ + v₀ t + ½ a t²

Let's fix our the reference system at a point where the car  indicate that the car stops from rest is vo = 0.

 x₀ = v₀ = 0

x = ½ a t²

truck  

x₂= v₀ t

v₀ = 15.4 m / s

At the point where they are,  positions are equal:-

½ a t² = vo t

t = 2 vo / a

calculate us

t = 2 15.4 / 2.

t = 11.407 s

b) the distance to reach it

x = ½ to t²

x = ½ 20 11.407²

x = 175.66 m

c)  the speed of the car is

 v = vo + a t

  vo = 0

    v = at

      v = 2.0 11.407

       v = 30.80 m / s

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The rate constant for the nuclide is 0.0802[tex]min^-^1[/tex]

What is decay of nuclide?

Radioactive decay is a statistical phenomenon that occurs when unstable nuclides spontaneously decay and emit particles or photons. Alpha, beta, gamma, electron capture (EC), proton emission, neutron emission, cluster radioactivity, and spontaneous fission are the decay modes.

We know that,

M(t) = M e^-λt

Where,

M(t) = Mass of nuclide after decay of time t

M = Mass of nuclide after decay

λ = rate constant

t = time for decay

e^λt = M / M(t)

taking ln on both side:

λt = ln[tex](\frac{M}{M(t)})[/tex]

λ = [tex]\frac{ln(\frac{M}{M(t)})}{t}[/tex]

Given:

t = 23 mins

M = 12.9 gms

M(t) = 2.04 gms

Subsituting the values

λ = [tex](\frac{ln(\frac{12.4}{2.04})}{23}) min^-^1[/tex] = 0.0802[tex]min^-^1[/tex]

The rate constant for the nuclide is 0.0802[tex]min^-^1[/tex]

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The pressure exerted on the ground by the box of mass 5 kg is 0.98 N/m².

Pressure is defined to be the amount of force exerted per area acting on the surface of a body.

To calculate the preesure exerted on the ground, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the pressure exerted on the ground is 0.98 N/m².

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Answer:

Please send a picture for context and I will be able to answer the question.

Explanation:

Without the picture I do not understand.

The answer is "true" that if a particle is having zero momentum then it must also have zero kinetic energy.

Kinetic energy is the term used in physics to describe the force that a moving item has. It is described as the amount of effort necessary to accelerate anybody with a particular mass from rest to a given velocity. Except variations in speed, the body retains the kinetic energy it gains during acceleration.

The body uses exactly the same amount of energy when slowing down from its current rate to a state of rest. Formally, kinetic energy refers to any term in a system's Lagrangian that has a derivative with respect to time.

If the system has zero momentum it means that it has zero velocity because momentum is the combination of mass and velocity and when the velocity is zero the kinetic energy of the particle is also zero.

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The 10 diopter lens to be held closer to a piece of paper when focusing a distant object and diopter is unit of power of accomodation.

Two roughly fitting curved surfaces ground together will eventually become spherical spheres don’t bring parallel rays to a point this is called spherical aberration nearly axial rays (paraxial rays).

Two types of lens Convex and concave. Convex lenses make real images, concave make virtual images,the power of a lens (in diopters) is 1 over its focal length.

Implication of the gaussian formula is that when combining two lenses, add their power, adding a closeup filter allows a smaller object distance, changing object and image distances changes magnification.

lenses perform a 3D perspective transform of object space an object’s apparent size is inversely proportional to its distance linear lens motions move the in-focus plane non-linearly, focusing a lens changes the image size (slightly).

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The ball is 3.16 seconds in the air before it hits the ground.

GETTING A Grip According to Einstein's general theory of relativity, matter or energy causes a distortion of space (or more specifically, spacetime) known as gravity. A large item produces a gravitational field by distorting the geometry of the spacetime it is located in.

Galileo is credited with demonstrating that gravity causes objects of varying masses to fall with the same acceleration by dropping weights from the Leaning Tower of Pisa.

Solution:

Upward

v = v o - g t

0 m/s = 15 m/s - 9.81 m/s² · t

15 m/s = 9.81 m/s² · t

t = 15 m/s : 9.81 m/s²

t 1 = 1.53 s

h = v o · t - g t² / 2  + 2 m

h = 22.95 m - (9.81 m/s² · 2.3409 s²) / 2 + 2 m

h = 11.475 m + 2 m = 13.475 m

Downward:

13.475 m = 9.81 · t² / 2

t = √(13.475 · 2 ) / 9.81

t 2 = 1.66 s

t = t 1 + t 2 = 1.53 s + 1.66 s = 3.19 s

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The angular frequency of the glider that takes 0.30 s to travel the distance of 12 cm from one turning point to another is 20.93 rad/s.

The angular frequency is the magnitude of the angle of the sector of the circle formed by the trajectory of the point that moves in a circle per unit time. Briefly, angular speed is the angular speed accompanied by the direction. The unit of angular speed is rad/second or rad/minute or rad/hour, depending on what is known from each problem.

The equation for determining the angular speed or angular frequency is:

ω= 2[tex]\pi[/tex]/T or ω = 2[tex]\pi[/tex]f

Where f = 1/T

ω = angular speed or frequency (rad/second)

[tex]\pi[/tex] = 3.14

f = frequency (rev/second)

T = period (second)

We have,

T = 0.30 s

So, ω = 2[tex]\pi[/tex]/T

= 2 (3.14) / 0.30

= 20.93 rad/s

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Part h an l - r - c series circuit has inductance 42.0 mh , capacitance c , and resistance r . without the resistor, the angular frequency of oscillation is 624 rad/s . with the resistor, the angular frequency is 208 rad/s .

The value of R = 8.736 Ω

The value of C = 6.19 × 10⁻⁵ F

By a factor of 2, angular frequency (measured in radians per second) is bigger than frequency (measured in cycles per second, commonly known as Hz). Frequency is represented by the symbol rather than f. A sphere that revolves around an axis. Moving faster and satisfying = v / r are points further from the axis.

Given that,

inductance (L) = 42 mH

                        = 42 × 10⁻³ H

angular frequency (ω) = 620 rad/sec

without the resistor, the angular frequency of oscillation is,

ω = [tex]1/\sqrt{LC}[/tex]

or, [tex]1/\sqrt{LC}[/tex] = 620 rad/sec

or, [tex]1/LC[/tex] = (620)²

or, C = 1 / (620)²× (42 × 10⁻³)

or, C = 6.19 × 10⁻⁵ F

With resistor, ω = 208 rad/sec

or, ω = R/L

or, R = ωL

or, R = (42 × 10⁻³) × (208)

or, R = 8.736 Ω

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The complete question is as follows:

An L-R-C series circuit has inductance 42.0 mH, capacitance C, and resistance R. Without the resistor, the angular frequency of oscillation is 624 rad/s. With the resistor, the angular frequency is 208 rad/s.

Find the value of C.

Find the value of R.

True, A moving object is constantly speeding up when there is an acceleration in the positive direction.

Our principle states that as an item slows down, the acceleration is going in the opposite direction of the velocity. This object, therefore, has a negative acceleration. The object has a negative velocity and is traveling in the opposite direction as it accelerates.

The rate at which a moving object's speed and direction change over time is known as its acceleration. When anything moves faster or slower, it is said to be moving faster in a straight line. Motion in a circle accelerates even at a constant speed because the direction is continuously changing. The acceleration of all other motions is influenced by both effects.

Due to its magnitude and direction, acceleration is a vector quantity. Speed is another vector quantity. The definition of acceleration is the velocity vector change during a period of time divided by the period of time. The instantaneous acceleration is based on the maximal ratio of the change in velocity (at a specific time and place).

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If you stare at a red object and immediately look at a white area afterward, you will see an afterimage that is the same size and shape, but it is blue-green, or cyan, in color. '

This is known as the opponent process theory

The opponent process theory of color vision says that color is processed in pairs (red-green, yellow-blue, and black-white.)

It means that Light that stimulates one half of the pair inhibits the other half.

In conclusion, this opponent process is thought to be responsible for our perception of color and explains why people experience afterimages.

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