1. Four positive charges, q1, q2, q3, and q4, of


8. 00 C, each are arranged to form a 30. 0 cm wide square as shown.


a. Find the distance of each charge from the center of the square.


21. 2 cm


b. Find the strength and direction of the electric field vectors of q1, q2, q3, and q4, at the center of the square.



c. Find the strength and direction of the electric field at the center of the square

Answer:

t = 2.2 s

Explanation:

Given that,

Height of the roof, h = 24.15 m

The initial velocity of the pumpkin, u = 0

We need to find the time taken for the pumpkin to hit the ground. Let the time be t. Using second equation of kinematics to find it as follows :

\(h=ut+\dfrac{1}{2}at^2\)

Here, u = 0 and a = g

\(h=\dfrac{1}{2}gt^2\\\\t=\sqrt{\dfrac{2h}{g}} \\\\t=\sqrt{\dfrac{2\times 24.15}{9.8}} \\\\t=2.22\ s\)

So, it will take 2.22 s for the pumpkin to hit the ground.

A cartridge is removed from the chamber by the extractor mechanism, and is then ejected by the ejector.

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Answer:

Electrostatic force

Explanation:

When we comb the hair

Answer: The decomposition of H₂O₂ is a first-order reaction. Then, the reaction rate will be 2 times the original rate, if we double its concentration value.

Explanation: To find the answer, we need to know about the decomposition of H₂O₂.

                              2H₂O₂→ 2 H₂O+ O₂

                              Rate = k [H₂O₂]1

              Rate = rate constant × concentration of [H₂O₂]

         rate constant=k and the concentration of [H₂O₂] = 1[H₂O₂].

                              Rate = 2k [H₂O₂].

Thus, we can conclude that the rate of reaction will be 2 times the initial rate if we double the concentration.

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If we double the concentration value, the reaction rate will be twice as fast as before.

In order to determine the solution, we must understand how H2O2 breaks down.

                        2H₂O₂→ 2 H₂O+ O₂

                      Rate = [H2O2] k

                   Rate = rate constant × [H2O2] concentration

                           Rate = [H2O2] 2k.

As a result, we can infer that doubling the concentration will cause the reaction rate to double.

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Answer:

x = 4.32 [m]

Explanation:

We must divide this problem into three parts, in the first part we must use Newton's second law which tells us that the force is equal to the product of mass by acceleration.

∑F = m*a

where:

F = force = 700 [N]

m = mass = 2030 [kg]

a = acceleration [m/s²]

Now replacing:

\(F=m*a\\700=2030*a\\a = 0.344[m/s^{2}]\)

Then we can determine the final speed using the principle of conservation of momentum and amount of movement.

\((m_{1}*v_{1})+Imp_{1-2}=(m_{1}*v_{2})\)

where:

m₁ = mass of the car = 2030 [kg]

v₁ = velocity at the initial moment = 0 (the car starts from rest)

Imp₁₋₂ = The impulse or momentum (force by the time)

v₂ = final velocity after the impulse [m/s]

\((2030*0) + (700*5)=(2030*v_{2})\\3500 = 2030*v_{2}\\v_{2}=1.72[m/s]\)

Now using the following equation of kinematics, we can determine the distance traveled.

\(v_{2}^{2} =v_{1}^{2}+2*a*x\)

where:

v₂ = final velocity = 1.72 [m/s]

v₁ = initial velocity = 0

a = acceleration = 0.344 [m/s²]

x = distance [m]

\(1.72^{2}=0^{2} +(2*0.344*x) \\2.97 = 0.688*x\\x = 4.32 [m]\)

Answer:

Her altitude as she crosses the bar, h₂ is approximately 6.1 m

Explanation:

The given parameters of the motion of the pole vaulter are;

The mass of the pole vaulter, m = 57 kg

The speed with which the pole vaulter is running, u = 11 m/s

The speed of the pole vaulter when she crosses the bar, v = 1.1 m/s

The acceleration due to gravity, g = 9.8 m/s²

From the total mechanical energy, M.E. equation, we have;

M.E. = P.E. + K.E.

Where;

P.E. = The potential energy of the motion = m·g·h

K.E. = The kinetic energy of the motion = 1/2·m·v²

By the principle of conservation of energy, we have;

The change (loss) in kinetic energy, ΔK.E. = The change (gain) in potential energy, ΔP.E.

ΔK.E. = 1/2·m·(v² - u²)

ΔP.E. = m·g·(h₂ - h₁)

Where;

h₁ = The ground level = 0 m

h₂ = The altitude with which she crosses the bar

∴ 1/2·m·(v² - u²) = m·g·(h₂ - h₁)

(h₂ - h₁) = (v² - u²)/(2·g) = (11² - 1.1²)/(2·9.8) = 6.11173469388

h₂ = 6.11173469388 + h₁ = 6.11173469388 + 0 = 6.11173469388

h₂ = 6.11173469388

Her altitude as she crosses over the bar, h₂ ≈ 6.1 m.

Answer:

8.14n in mars

Explanation:

gravitational

Electrons do display wavelike properties, just like photons. This phenomenon is known as wave-particle duality. When an electron gun emits electrons one at a time, and these electrons travel through a double slit to a detector screen, the pattern that appears on the screen is known as an interference pattern.

This pattern is formed due to the wave nature of electrons, which allows them to interfere with themselves.

As electrons pass through the double slit, they form a diffraction pattern, which is similar to the pattern formed by a photon.

This diffraction pattern creates areas of constructive and destructive interference, leading to the formation of an interference pattern on the detector screen.

The interference pattern is a series of light and dark fringes that demonstrate the wave-like nature of electrons.

Therefore, the pattern that would appear on the detector screen after many electrons are emitted would be an interference pattern consisting of bright and dark fringes.

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Answer:



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Home / AC Circuits / Power in AC Circuits



Power in AC Circuits

Electrical power consumed by a resistance in an AC circuit is different to the power consumed by a reactance as reactances do not dissipate energy

  

In a DC circuit, the power consumed is simply the product of the DC voltage times the DC current, given in watts. However, for AC circuits with reactive components we have to calculate the consumed power differently.

Electrical power is the “rate” at which energy is being consumed in a circuit and as such all electrical and electronic components and devices have a limit to the amount of electrical power that they can safely handle. For example, a 1/4 watt resistor or a 20 watt amplifier.

Electrical power can be time-varying either as a DC quantity or as an AC quantity. The amount of power in a circuit at any instant of time is called the instantaneous power and is given by the well-known relationship of power equals volts times amps (P = V*I). So one watt (which is the rate of expending energy at one joule per second) will be equal to the volt-ampere product of one volt times one ampere.

Then the power absorbed or supplied by a circuit element is the product of the voltage, V across the element, and the current, I flowing through it. So if we had a DC circuit with a resistance of “R” ohms, the power dissipated by the resistor in watts is given by any of the following generalised formulas:

Answer:

B

Explanation:

resultant force is 5 so fnet /m=a

or 5/5=1ms2=B

Answer:

The magnets are surrounded by an invisible magnetic field that contains stored-up, or potential, energy. When attempting to push two like-sided poles together, the stored-up energy becomes movement, or kinetic energy, and forces them apart. The same principle happens when two unlike poles come together.

Answer:

They will strike at the same time

Explanation:

Both will hit the ground at the same time.

What is total energy ?

Total energy of any object under consideration is the sum of potential energy (P.E) and kinetic energy (K.E) and is constant throughout the motion.

Here, it is given that the both rocks are falling from same height and

there is no initial velocity in vertical direction for both rocks

The only external force that is applied on them is gravitation force which is also constant in both cases.

Therefore, they will hit the ground at the same time considering air resistant and all others factors neglected.

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density(ρ) = mass (m) : volume (V)

Answer:

17 - length of the fork

18 - number of turns

19 - material of the fork

Explanation:

it's a quarter and a half basically an amount of it it's actually the measurement of your actually doing and the size and the programs and you should basically do the l up and the l down just another kid information from it so this is what it goes from

The total resistance is 420 ohm.

A circuit with resistive elements of 220, 100, 57, and 43 produce what total resistance  

 R= 220+ 100+ 57+ 43

    = 420 Ω

What is resistance and its types?

Resistance is a measure of the opposition to current flow in an electrical circuit also known as ohmic resistance or electrical resistance. Ohms are measured as resistance, symbolized by the Greek letter omega (Ω). The ratio of the applied voltage to the current through the material is then known as resistance.

What causes resistance?

An electric current flows when electrons move through a conductor, such as a metal wire. The moving electrons can collide with the ions in the metal. This makes it more difficult for the current to flow, and causes resistance.

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Answer:

Work is said to be done when there is change in the position of the object due to the force applied on it.

Explanation:

Hope this helped! Nya~ :3

The distance traveled by the box along the ramp is 0.51 m.

Apply the principle of conservation of energy;

Potential energy of the box at top of incline = Elastic potential energy at bottom

mgh = ¹/₂kx²

where;

h = L sinθ

where;

mg(L sinθ) = ¹/₂kx²

(18)(9.8)(L sin25) = ¹/₂(740)(0.32)²

74.55 L = 37.89

L = 37.89 / 74.55

L = 0.51 m

Thus, the distance traveled by the box along the ramp is 0.51 m.

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Answer:

The net force on the object is 35 N directed up.

Explanation:

Net Force

The force is a vector because it has magnitude and direction. The net force is the sum of all the individual forces acting on an object.

Let's assume the forces directed upward are positive and the forces directed down are negative.

Force A: +50 N

Force B: -30 N

Force C: +25 N

Force D: -10 N

Net Force= 50 - 30 + 25 - 10 = 35 N

The net force on the object is 35 N directed up.

Answer:

A) v₁ = 5.66 [m/s]

Explanation:

To solve this problem we must use the definition of linear momentum conservation, which tells us that momentum is conservation before and after a collision.

The linear momentum is equal to the mass by the product of the Velocity.

P = m*v

where:

P = lineal momentum [kg*m/s]

m = mass [kg]

v = velocity [m/s]

Now, to the right side of the equal sign will take the linear momentum before the collision and to the left side of the equal sign as after the collision.

Pbefore = Pafter

(m₁*v₁) - (m₂*v₂) = (m₁*v₃) + (m₂*v₄)

where:

m₁ = mass of the car = 1450 [kg]

v₁ = velocity of the car before the collision [m/s]

m₂ = mass of the shopping cart = 60 [kg]

v₂ = velocity of the shopping cart before the collision = -1.2 [m/s]

v₃ = velocity of the car after the collision = 5.13 [m/s]

v₄ = velocity of the shopping cart after the collision = 11.75 [m/s]

Now replacing:

(1450*v₁) - (60*1.2) = (1450*5.13) + (60*11.75)

1450*v₁ - 72 = 7438.5 + 705

1450*v₁  = 7438.5 + 705 + 72

1450*v₁ = 8215.5

v₁ = 5.66 [m/s]

Answer:

5.67 m/s

Just did it.

Answer: There is two event that needs to be made: 1. blue eyes, and 2. brown eyes. A spinner is made with a circle. A full circle has 360 degrees and it would be divided based on the probability of the event.

Blue eyes have 25% chance, so the angle of the spinner would be 25%*360°= 90°

Brown eyes have 75% chance, so the angle of the spinner would be 25%*360°= 270°

So, the 90° of the circle would be written as 1(blue eyes) and 270° of the circle will be written as 2(brown eyes).

Explanation: u welcome

Answer: I have no clue

Explanation: I don’t know

The magnitude of the average induced emf in the wire during this time period is zero.

When a wire loop with radius 0.3 m is placed in a uniform magnetic field of magnitude 0.52 T, an emf (electromotive force) is induced in the wire due to Faraday's law of electromagnetic induction.

If the wire is reshaped from a circle to a square in 0.06 s, we can determine the magnitude of the average induced emf during this time period.

First, we need to determine the magnetic flux through the wire loop, which is given by:

Φ = B * A * cosθ

where B is the magnitude of the magnetic field, A is the area of the loop, and θ is the angle between the magnetic field and the normal to the plane of the loop.

In this case, the angle θ is zero because the magnetic field is perpendicular to the plane of the loop, so we have:

Φ = B * A

where A is the area of the loop.

When the wire is reshaped from a circle to a square, the area of the loop changes, but the magnetic flux through the loop remains constant.

This is because the magnetic field is uniform, and the orientation of the loop with respect to the field does not change. Therefore, we can write:

Φ = B * A_circle = B * A_square

where A_circle is the area of the original circular loop, and A_square is the area of the new square loop.

Since the radius of the original loop is 0.3 m, we have:

A_circle = π * \((0.3 m)^2\) = 0.2827\(m^2\)

When the loop is reshaped into a square, each side has length 0.3 m, so we have:

A_square =\((0.3 m)^2\)= \(0.09 m^2\)

Substituting these values into the equation for the magnetic flux, we obtain:

Φ = B * A_circle = (0.52 T) * \((0.2827 m^2\)) = 0.1471 Wb

Now we can use Faraday's law to determine the average induced emf during the 0.06 s time period.

Faraday's law states that the magnitude of the induced emf is equal to the rate of change of the magnetic flux, so we have:

emf = ΔΦ/Δt

where ΔΦ is the change in the magneconstanttic flux during the 0.06 s time period. Since the magnetic flux remains , ΔΦ is zero, and the average induced emf during this time period is also zero.

Therefore, the magnitude of the average induced emf in the wire during this time period is zero.

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I know most of the answers will say infinity, but still this needs deeper look about its physical meaning and does it consider a practical logic?

Infinity usually used for something we could not measure, however the reality may be different!

The denominator of the equation would become 0 and the mass would become infinite if the mass's velocity ever surpassed the speed of light.

The amount of energy needed to accelerate an infinite mass would be infinite as well. The fact that light travels at the speed of c indicates that it has no rest mass.

When a mass particle approaches the speed of light, its energy grows and becomes infinite at that speed, which is why it can never be accelerated to that speed.

Experiments have confirmed this, and it has been demonstrated that nothing goes faster than the speed of light.

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The speedboat momentum is 19,500 kg.m/s.

We need to know about momentum to solve this problem. Momentum can be defined as the degree of difficulty to stop a moving object. It can be determined by

P = m . v

where P is momentum (kgm/s), m is mass (kg) and v is velocity (m/s).

From the question above, we know that:

m = 1500 kg

v = 13 m / s

By substituting the given parameters, we can calculate the momentum

P = m . v

P = 1500 . 13

P = 19,500 kg . m / s

Hence, the speedboat momentum is 19,500 kg.m/s.

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Answer:19,500 kg

Explanation:your welcome!:)

Given:

The upward acceleration of the elevator, a=1.24 m/s²

The mass of the person, m=91.3 kg

To find:

The reading of the scale.

Explanation:

When the elevator is accelerating upwards, the force applied on the scale is given by,

On substituting the known values,

Final answer:

The reading of the scale is 1007.95 N

Between visible light and microwave is where infrared falls. Infrared has a higher energy than radio but a lower energy than gamma rays.

The term "infrared" refers to electromagnetic waves that exist within the electromagnetic spectrum at frequencies slightly below those of red visible light and just above those of microwaves. According to the California Institute of Technology, the wavelengths of infrared radiation are longer than those of visible light (Caltech).

The majority of the radio portion of the electromagnetic spectrum (EM spectrum) is found between 1 cm and 1 km, or 30 GHz and 300 kHz in frequency. The EM spectrum's radio region is relatively vast. Astronomers usually employ wavelength in the infrared and optical spectrum.

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More than a 100 nations broadcasted series. The Bold and the Beautiful teasers for the upcoming CBS soap opera hint at more conflict.

The line dividing the Earth's surface from the sky is known as the horizon. Earth-sky horizons and celestial horizons are the two basic categories of horizons. There are various sub-types of horizons for both Earth-sky and celestial horizons. Earth-sky horizons include the local horizon, regional horizon, and sea level horizon.

The particle horizon, also known as the cosmological horizon, comoving horizon, or cosmic light horizon, is the furthest a particle's light may have travelled before reaching an observer during the early universe's history.

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