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Answer:

there are the three basic

first law also called the law of inertia

the second one is the second law of motion and its equation is

F = ma

where m is the mass and a is the acceleration

its SI units are mass is kg and Acceleration is m/\(s^{2}\)

the third law is called the action-reaction law

also the law of gravitation in which we survive our own earth-like plane due to the basic concept of the law of gravitation because the idea of gravitation is deal with this important law

F=GmMe/\(R^{2}\)

The G value is 6.673*10^-11

m is the mass of an object

Me is the mass of the earth in our case we consider the object and the earth.

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Given, discrete-time signal is as follows; x[n] = -2δ[n] - δ[n-1] + δ[n-3] + 2δ[n-4] The time-averaged power of a signal x(t) is defined as the average of the square of the absolute value of the signal over time T.

It is given by; \(Pav = lim (T → ∞) {1/T ∫[x(t)]^2 dt}\) joules For a discrete-time signal x(n), the power can be defined by replacing the integral with summation as;\(P[n] = 1/N ∑_{n=0}^{N-1} |x(n)|^2\)joules where N is the total number of samples in the signal. Let's find the energy of the given signal;

E[n] = ∑_{n= -∞}^{∞} |x(n)|^2Let's calculate E[n] for \(n=0;x[0] = -2δ[0] - δ[-1] + δ[-3] + 2δ[-4]δ[-1] = 0, δ[-3] = 0\), δ[-4] = \(0x[0] = -2δ[0]x[0]^2 = 4δ[0]^2 = 4E[0] = 4\) joules Let's calculate E[n] for n=1; \(x[1] = -2δ[1] - δ[0] + δ[-2] + 2δ[-3]δ[-2] = 0\), \(δ[-3] = 0x[1] = -δ[0] - 2δ[1]x[1]^2 = δ[0]^2 + 4δ[1]^2 + 4δ[0]δ[1] = 4δ[1]^2E[1] = 4\) joules.

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coulomb force into newton's second law and solve for the acceleration. what is the algebraic representation of the acceleration of the disc? your answer should

q1 and q2 are the charges of the two discs, m is the mass of a disc, and r is the distance between the discs. epsilon_0 is the electric permittivity of free space.

Electric permittivity, also known as the dielectric constant, is a measure of how easily an electric field can pass through a material.

The algebraic representation of the acceleration of the disc is given by the following expression:
a = (q1*q2)/(4*pi*epsilon_0*m*r^2)
This expression is derived from Newton's Second Law, which states that the net force is equal to the mass of the object multiplied by its acceleration, F = ma. The net force in this case is the Coulomb force between the two charged disks, which is given by the expression F = (q1*q2)/(4*pi*epsilon_0*r^2). Substituting this expression into Newton's Second Law, we can solve for the acceleration: a = (q1*q2)/(4*pi*epsilon_0*m*r^2).
Here, q1 and q2 are the charges of the two discs, m is the mass of a disc, and r is the distance between the discs. epsilon_0 is the electric permittivity of free space.

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Electric field strength decreases as the distance from the source increases.

The strength of an electric field is inversely related to square of the distance from the source. This means that the electric field strength decreases when the distance from the source increases.

So we can conclude that Electric field strength decreases as the distance from the source increases.

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Answer: 15.68ms

Explanation:

From the question, we are informed that it takes a time of 3.20s for the ball to return to her hand.

Then, the time thst will be taken by the ball to reach maximum height will be 1.6s

Let the initial speed be represented by v.

Therefore,

Vf = v - gt

where,

g = 9.8

t = 1.6

Vf = v - gt

0 = v - (9.8 × 1.6)

0 = v - 15.68

v = 15.68ms

=v−gt

⟹0=v−9.8×1.6

⟹v=15.68ms

Answer:

E= 600 W

Explanation:

Given that

m = 2 kg

Speed ,  v= 10 m/s

Force , F= 60 N

Given that box is moving with constant velocity, it means that friction force will be 60 N.

f = 60 N

Therefore total energy generated

E= f x v

E= 60 x 10 = 600 W

E= 600 W

Thus the answer will be 600 W.

The water analogy can be considered a useful but imperfect tool for describing the nature of the Trinity. It is true that water can exist in three different states - solid (ice), liquid (water), and gas (steam) - which can help us grasp the concept of three distinct yet interconnected entities within the Trinity (Father, Son, and Holy Spirit). However, this analogy has limitations, as it does not fully convey the complexity and uniqueness of the Trinity.

The water analogy might imply modalism, the belief that God takes on different "modes" or forms at different times, which is not an accurate representation of the Trinity. In Christianity, the Father, Son, and Holy Spirit are believed to be distinct persons that exist simultaneously, not merely different states or forms of a single being.

Additionally, the analogy could be misunderstood as suggesting that the three persons of the Trinity are divisible, just like the three states of water. However, the persons of the Trinity are indivisible, sharing the same divine essence.

In conclusion, while the water analogy may be helpful in understanding the concept of the Trinity to some extent, it is important to recognize its limitations and not to rely on it as a complete explanation for this complex theological concept.

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The greatest stress that a material can withstand before failing is referred to as its strength. Its stiffness describes how much it will flex or bend when pulled. High strength is frequently found in materials with high stiffness. The greatest stress that a material can withstand before failing is referred to as its strength.

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Answer:

Explanation:

One possible reason for switching off the cell between measurements when determining its electromotive force (emf) and internal resistance is to prevent any external influences or interference during the measurement process. Here's a more detailed explanation:

Minimizing external factors: Switching off the cell during measurements helps minimize the impact of external factors such as electromagnetic fields, stray currents, or fluctuations in the power supply. These external factors can introduce noise or errors into the measurements, making it difficult to obtain accurate results.

Avoiding self-discharge: Some types of cells, particularly rechargeable batteries, have a tendency to self-discharge over time, even when not in use. By switching off the cell between measurements, you can reduce the self-discharge rate and ensure that the cell's energy remains relatively stable throughout the measurement process. This helps maintain consistent and reliable readings.

Preserving battery life: If the cell being measured is not rechargeable or has limited capacity, switching it off between measurements helps conserve its energy. Constantly leaving the cell connected or in an active state could drain its power unnecessarily, leading to a shorter overall lifespan or the need for more frequent replacements.

Eliminating circuit effects: When a cell is connected to a circuit, it interacts with the circuit's components, including wires, resistors, and other elements. These interactions can affect the cell's behavior and introduce additional resistance into the circuit, potentially leading to inaccuracies in the measurement of the cell's internal resistance. By disconnecting the cell between measurements, you can isolate it from the circuit and obtain more precise results.

he genuine picture forms behind center of curvature when an item is positioned halfway between both the center of the curvature and the point of focus. The image appears smaller than the item in terms of size.

What is the concave mirror's center of curvature?

a light-rayed concave mirror. middle of the curve. In geometry, the location of a curve's center of curvature is determined at a point that is located on the normal vector and spaced apart from the curve by an equal amount to a radius of curvature. If indeed the curvature is zero, it refers to the point at infinity. The center of the osculating circle for the curve is located there.

How can the radius of a curve be calculated?

the distant point along the upward ray of a normal vector, in which the curvature radius. It is expressed as follows: where is the tangent direction and is the normal vector. 

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The equation F ≤ mg gives the vertical force he must apply to the pole. The magnitude of the force is 90.0 times the acceleration if the mass of the firemen is 90kg.

The given data is:

Mass of firemen = m

Acceleration = a

a.

There are two forces acting on the fireman. They are his weight (mg) acting downwards, and the force of friction (F) between the pole and the fireman acting upwards.

The fireman is sliding down the pole, and the force of friction must be less than the force of gravity acting toward the fireman or equal. Therefore, the equation giving the vertical force he must apply to the pole is,

F ≤ mg.

b.

If the fireman's mass is 90.0 kg and he accelerates at a rate of a.

The magnitude of his applied force can be calculated by:

a = F/m

To calculate the Forec, we can rearrange the equation as:

F = ma

F = (90.0 kg) x (a)

Therefore we can conclude that the magnitude of the force is 90.0 times the acceleration a.

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Answer:

The gravitational force on the moon is less than on Earth because the strength of gravity is determined by an object's mass. The bigger the object, the bigger the gravitational force. Gravity is pretty much everywhere. We just feel it in different ways depending on our state of motion.

Explanation:

Hope this helped!!

Answer:

because sound needs medium to transmit.

The sound is produced by vibration and if there is no medium there is no vibration and no vibration means no sound.

The amount of heat energy the water absorbed, given that the water's temperature increases from 298 K to 355 K is 476976 J

We know from calorimetry, that heat energy is given by:

Q = MCΔT

Where

With the above formula, we can determine the heat energy absorbed as follow:

Q = MCΔT

Q = 2 × 4184 × 57

Q = 476976 J

Thus, from the above calculation, we can conclude that the heat absorbed is 476976 J

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The following terms are explained in the context of spherical mirrors.For convex mirrors, the principal focus is the point where the extensions of parallel rays appear to converge after reflection. It is a virtual focus.

(i) Pole: The pole (P) is the geometric center of the mirror. It is the point where the principal axis intersects the mirror's surface. The pole does not change regardless of the mirror's curvature or size.

(ii) Centre of curvature: The centre of curvature (C) is the center of the sphere from which the mirror is formed. It is located outside the mirror and lies on the principal axis. The radius of curvature (R) is the distance from the mirror's surface to the center of curvature.

(iii) Principal axis: The principal axis is an imaginary line passing through the pole (P) and the centre of curvature (C) of the mirror. It is perpendicular to the mirror's surface and serves as a reference line for measuring distances and angles in mirror optics.

(iv) Principal focus: The principal focus (F) is a specific point on the principal axis of a spherical mirror. For concave mirrors, the principal focus is the point where parallel rays of light converge after reflection. It is a real focus.

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Answer:

electrons

Explanation:

they go through the wires and power our computer tech

Answer:

Electric energy is a form of kinetic energy.

Answer:

umm.....the teachers and friends

The drama, and friends.

Answer:

Its d 3.74 x 10-8N

Explanation:

Answer: 3.74 x 10-8 N

Explanation:

Answer:

28.6 m/s

Explanation:

Using the equation for the range of a projectile,

R = U²sin2θ/g where U = initial speed of flaming pitch balls, θ = launch angle = 53° and g = acceleration due to gravity = 9.8 m/s²

Making U subject of the formula, we have

U = √(gR/sin2θ)

substituting the values of the variables into the equation given that R = 81.1 m, we have

U = √(9.8 m/s² × 81.1 m/sin2(53°))

U = √(794.78 m²/s²/sin106°)

U = √(794.78 m²/s²/0.9613)

U = √(826.78 m²/s²)

U = 28.75 m/s

U ≅ 28.6 m/s

The visible part of the electromagnetic spectrum consists of light that we can see with our eyes.

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To find the temperature of Rigel's surface, we can use Wien's displacement law, which relates the peak wavelength of a black body radiation spectrum to its temperature.

Wien's displacement law is expressed as:

λ_peak = (2.898 × 10^-3 m·K) / T

where λ_peak is the peak wavelength in meters and T is the temperature in Kelvin.

First, we need to convert the peak wavelength from nanometers to meters. Since 1 nm = 10^-9 m, the peak wavelength of Rigel can be expressed as:

λ_peak = 145 nm = 145 × 10^-9 m

Next, we can rearrange the equation to solve for temperature:

T = (2.898 × 10^-3 m·K) / λ_peak

Plugging in the values, we have:

T = (2.898 × 10^-3 m·K) / (145 × 10^-9 m)

Simplifying, we get:

T = 2.898 × 10^-3 m·K × (1 / (145 × 10^-9 m))

T = 2.898 × 10^-3 m·K × (1 / 145 × 10^-9 m)

T = 2.898 × 10^-3 K / 145

T ≈ 0.019993 K

Therefore, the temperature of Rigel's surface is approximately 0.019993 Kelvin.

Note: The answer is given in Kelvin since temperature is commonly measured in this unit in scientific calculations.

More than 100 words.

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The dielectric strength of a dielectric substance is equal to the greatest magnitude of the external electric field that does not cause electrical breakdown. When an electric field is applied to a dielectric, the dielectric will transform into a conductor at a point known as electrical break down.

Given that

A parallel plate capacitor consists:

Capacitance Co

Plates of Area A

Separation distance between the plates d

Voltage of a battery Vo

Magnitude of charge Qo

Dielectric constant K=3

the capacitance of parallel plate capacitor when there is free space between the plates is given by

Co = εoA/d

Where εo is permittivity of free space.

If the battery is connected to the parallel plate capacitor, the gap between the plates is filled with dielectric constant. The capacitance of the parallel plate capacitor for the medium will then be determined.

a) C=KεoA/d

=3εoA /d

=3 Co

Now, the potential difference between the plates will be

b) Vo =QC

Vo=QC

Hence, the magnitude of charge by adding dielectric medium will be

c) Q= CVo

=3εoA Vo /d

=3 Co Vo

=3 Qo

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Answer:

President who did not win the popular vote

Explanation:

Critics of the Electoral college argue that the system can result in a selection of what?

Load = E = 5196.15 volts.

Given parameters,

Synchronous reactance, Xs = 6 ohms

Excitation voltage, Eo = 3 kV

Line voltage, V = 3 Eo = 9 kV

Load impedance, Z = 8 ohms

Line impedance, ZL = Xs + Z

                                 = 6 + 8

                                 = 14 ohms

Phase voltage, E = V / √3

                            = 9000 / √3 volts

                            = 5196.15 volts

Load phase current, IL = E / Z

                                      = 5196.15 / 8 amps

                                       = 649.52 amps

Line current, I = IL

Load line-to-neutral voltage, E

Load = E = 5196.15 volts.

The phase voltage is shown in black, and the line current is shown in red.

phasor diagram

          |

   Va   |      VLa

           |

           |

----------|----------------

           |\

           |  \

   Vb   |    \   VLb

           |      \

           |        \

----------|-----    \----------

           |           \

   Vc    |             \  VLc

           |

In this diagram, the three-phase source voltages Va, Vb, and Vc are represented by vectors pointing in different directions.

Similarly, the three-phase load voltages VLa, VLb, and VLc are represented by vectors pointing in different directions.

Note that the line voltage and line current are 30 degrees apart, and that the line current leads the phase voltage.

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Answer:

let the voltages of the cell be V and R the equivalent resistance of the circuit.

I1=RV∵ only one cell connected  ;

I2=RV+V=R2V∵ two cells connected in series  ;

I3=RV+RV=R2V∵ two cells connected in parallel ⇒ total current is same as sum of the currents due to each.

Now , 

LHS = 3I3I2=3R2VR2V=3(R24V2) 

RHS = 2I3(I1+I2)=2R2V(RV+R2V)=2R2VR3V=3R2therefore, LHS = RHS   

Shale,sandstone, and limestone are the most common types of sedimentary rocks.

Given data:

* The distance covered in the given case is 150 meters.

* The time taken to cover the distance is 18 seconds.

Solution:

In the case of uniform motion of the body, the average speed of the body is the ratio of distance traveled and time taken by the body.

Thus, the average speed of the given person is,

Thus, the average speed in m/s is 8.33 m/s.

Answer:

Cleaning agents or hard-surface cleaners are substances used to remove dirt, including dust, stains, bad smells, and clutter on surfaces. Purposes of cleaning agents include health, beauty, removing offensive odor, and avoiding the spread of dirt and contaminants to oneself and others.

Answer:

Cleaning agents are substances created for the purpose of cleaning surfaces from germs dirt fungus diseases etcetera.

Explanation:

The author's best argument against the light-rail project is that it is unnecessary. A combination of trams characterizes light rail transit, a type of passengers urban rail transportation.

In big cities, LRT can function as an independent organization or as a complement to heavy rail and passenger rail systems. The fastest and most economical interurban transport in a city is provided by LRT.

Heavy rail systems can be supplemented by LRT, and commuter rail networks in big cities can function independently. In a metropolitan area, LRT offers the fastest and most affordable interurban transportation service. It is intended to close a considerable gap between light rail and local buses.

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