A force of 10 N is applied horizontally to a 2 kg object on a level surface. The coefficient of kinetic friction between the object and the surface is 0.20. If the object is moved a distance of 10 m, what is the change in kinetic energy?

Answer:

2 electrons in energy level 6

The main difference between static electricity and current electricity lies in the presence or absence of continuous charge flow.

Static electricity and current electricity are two forms of electric phenomena, but they have fundamental differences in their nature and behavior. Static electricity refers to the accumulation of electric charges on an object with no flow of electric current. It occurs when there is an imbalance of electric charges on the surface of objects, resulting in a buildup of static charges. These charges can be generated through friction, induction, or contact with other charged objects. Static electricity is characterized by its ability to produce electric sparks and shocks.

On the other hand, current electricity involves the flow of electric charges through a conductive medium, such as a wire or circuit. It is the continuous movement of electrons in a specific direction. Current electricity is driven by an electric potential difference (voltage) that causes the flow of charges from a higher potential to a lower potential. It is the basis for the functioning of electrical circuits, powering devices, and transmitting electrical energy. In terms of behavior, static electricity is typically characterized by a sudden discharge of accumulated charges when there is a pathway for them to flow. This can result in phenomena like electric sparks or shocks. However, static charges do not flow continuously like in current electricity.

Current electricity, on the other hand, forms a closed loop circuit where charges continuously flow, driven by a potential difference. It can be controlled, regulated, and harnessed for various purposes, such as powering appliances, generating light, or transmitting signals.

Another difference is the nature of the charges involved. In static electricity, charges can be positive or negative, and they tend to accumulate on the surfaces of objects. In current electricity, charges flow in a circuit, with electrons carrying negative charge constituting the flow of current.

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Explanation:

Given:

v₀ = 0 m/s

a = 3 m/s²

t = 4 s

Find: Δx and v

Δx = v₀ t + ½ at²

Δx = (0 m/s) (4 s) + ½ (3 m/s²) (4 s)²

Δx = 24 m

v = at + v₀

v = (3 m/s²) (4 s) + 0 m/s

v = 12 m/s

The piece of evidence that suggests that the inner planets were formed from the same rotating cloud of gas and dust is that the planets orbit the sun in the same direction and in the same plane

Smaller planets like Mercury, Venus, Earth, and Mars are considered inner planets. Mercury is thought to be the smallest inner planet, with Earth being the largest. The vastly larger outer planets, such as Jupiter, Saturn, Uranus, and Neptune, are the opposite.

A route that an object or planet in space follows around another body is referred to as an orbit. Moons are satellites that orbit many planets. A man-made satellite is also possible, such as the International Space Station.

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Standing waves in water are produced most often by periodic water waves reflecting from a barrier. So, option B is correct alternative.

Nodes and antinodes serve as the defining features of standing waves. The particle's amplitude of vibration is greatest at its antinodes and least at its nodes. Different patterns can be created by the vibration of a string. Each pattern is known as a harmonic because it correlates to a specific frequency's vibration. The fundamental frequency, also known as the first harmonic, is the frequency at which the string vibrates at its lowest level and produces a standing wave. The frequency of each harmonic is determined by the wave's wavelength and speed.

Standing waves have the following traits:

1) The standing waves remain still. No direction is affected by the disturbance.

2) Nodes, or points of zero amplitude, and antinodes, or places of greatest amplitude, are characteristics of standing waves.

3) There won't be any energy flowing through the medium at all.

4) At the node and antinodes, respectively, the pressure change is greatest.

5) Any particle in the medium oscillates with a period that is identical to the component waves.

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Answer:

Basketball players

Explanation:

Basketball players

Answer:

t=10.95 seg

Explanation:

The vertical component of velocity is 0, so, the time in air can be calculated

\(h=v_ot-\frac{1}{2}gt^2\\\\h=0-\frac{1}{2}gt^2~=>t=\sqrt{2gh}=\sqrt{2*10\frac{m}{s^2}*6m}=10.9544~seg\)

Answer:

What is the gravity equation? — It is equal to 6.674×10-11 N·m²/kg². Did you notice that this equation is similar to the formula in Coulomb's law?

Explanation:

Newton's law of gravitation, statement that any particle of matter in the universe attracts any other with a force varying directly as the product of masses and inversely as the square of the distance between them.

Gravity is a universal force that ALL objects are attracted to in relation to the product of their masses, according to Newton's ground-breaking theory. Everywhere there is gravity. Of course, the majority of gravitational pressures are too small to be felt. Only as an object's bulk increases can gravitational forces be observed.

We can use the following method to determine the International Space Station's (ISS) altitude:

F = GMm / r²

F = mv²/ r

v²= Fr / m

v = √(Fr / m)

Substituting the given values, we get:

v = sqrt((36.99 N)(6,371,000 m) / 419,455 kg) = 7,659 m/s

Now we can use the formula for the altitude of a circular orbit:

r = R + h

where R is the radius of the Earth and h is the altitude of the ISS.

The Earth's circumference is roughly 6,371 km. To find h, we can rearrange the algorithm as follows:

h = r - R = (v²/GM) - R

Substituting the given values, we get:

\(h = [(7,69 m/s)^2 / (6.67430 x 10^-11 m^3/kg/s^2)(5.9722 x 10^24 kg)] - 6,371 km\)

h = 408 km.

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the magnitude of the magnetic field midway between the two wires is 5.0 × 10−5 T. Hence, option (B) is the correct answer.

Given data:

Two long parallel wires carry currents of 20 A and 5.0 A in opposite directions.

The wires are separated by 0.20 m.The magnetic field midway between the two wires is to be determined.Formula used:

B = (μ₀ * I * i)/(2πd)

Where,B is the magnetic field at the midpoint between two wires,μ₀ is the permeability of free space, which is equal to 4π × 10−7 T∙

m/ I is the current in the first wire, and i is the current in the second wire.d is the separation between the two wires.

Substitute the given values into the above formula,

B = (μ₀ * I * i)/(2πd) = (4π × 10−7 T∙m/A * 20 A * 5 A)/(2π * 0.20 m) = 5.0 × 10−5 T

Therefore, the magnitude of the magnetic field midway between the two wires is 5.0 × 10−5 T. Hence, option (B) is the correct answer.

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The cross-product \(\(F \times G\)\) is:\(\[F \times G = (3t^3 \cos(3t) - 2t^3)\mathbf{i} - (3t^5 \cos(3t) - t^3 \cos(3t))\mathbf{j} + (2t^4 - 3t^2 \cos(3t))\mathbf{k}\]\)

To find the cross-product \(\(F \times G\)\) of the vectors \(\(F\) and \(G\)\), we can use the determinant form of the cross-product formula:

\(\[F \times G = \begin{vmatrix}\mathbf{i} & \mathbf{j} & \mathbf{k} \\F_x & F_y & F_z \\G_x & G_y & G_z \\\end{vmatrix}\]\)

where \(\(F = F_x \mathbf{i} + F_y \mathbf{j} + F_z \mathbf{k}\) and \\\(G = G_x \mathbf{i} + G_y \mathbf{j} + G_z \mathbf{k}\)\).

Given:

\(\(F = \cos(3t) \mathbf{i} + 2t \mathbf{j} + 3t^2 \mathbf{k}\)\\\\\\(G = t^3 \cos(3t) \mathbf{i} + t^2 \mathbf{j} + 3e^{3t} \mathbf{k}\)\)

We can now substitute the components of \(\(F\)\) and \(\(G\)\) into the determinant form and calculate the cross-product.

\(\[F \times G = \begin{vmatrix}\mathbf{i} & \mathbf{j} & \mathbf{k} \\\cos(3t) & 2t & 3t^2 \\t^3 \cos(3t) & t^2 & 3e^{3t} \\\end{vmatrix}\]\)

Expanding the determinant, we get:

\(\[F \times G = (\cos(3t) \cdot (3t^2) - (2t \cdot t^2))\mathbf{i} - ((t^3 \cos(3t) \cdot 3t^2) - (\cos(3t) \cdot t^3))\mathbf{j} + ((2t \cdot t^3) - (\cos(3t) \cdot 3t^2))\mathbf{k}\]\)

Simplifying the expression, we have:

\(\[F \times G = (3t^3 \cos(3t) - 2t^3)\mathbf{i} - (3t^5 \cos(3t) - t^3 \cos(3t))\mathbf{j} + (2t^4 - 3t^2 \cos(3t))\mathbf{k}\]\)

Therefore, the cross-product \(\(F \times G\)\) is:

\(\[F \times G = (3t^3 \cos(3t) - 2t^3)\mathbf{i} - (3t^5 \cos(3t) - t^3 \cos(3t))\mathbf{j} + (2t^4 - 3t^2 \cos(3t))\mathbf{k}\]\)

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Explanation:

1) Nitrogenous base

2) Pentose sugar

3) One or more phosphate group

When the AC voltage is applied to the circuit, the SCR is triggered and the DC voltage is fed to the DC motor. When the AC voltage passes through the negative half cycle, the SCR is turned off, and no voltage is fed to the motor. This process continues to provide the required DC voltage to the DC motor. The speed of the motor can be varied by changing the value of R1. The forward and reverse direction of the motor can be controlled by changing the firing angle of the SCR.

For an industrial drive application, following are the specification given for an available ac supply and the dc motor.

Available power supply: 1 phase, 230 V, 50 Hz

DC motor ratings: 400 W, 110 V dc.

The dc motor can be controlled to operate the industrial drive in forward and reverse direction based on the given specification using the relevant converter circuit diagram with proper labeling. Shown below is the converter circuit diagram labelled with all the components and circuits involved:

In the above circuit, the DC motor is supplied with a DC voltage with the help of the half-wave controlled rectifier circuit. A Silicon-controlled rectifier (SCR) is used for controlling the output voltage of the converter. The forward and reverse direction of the motor can be controlled by changing the firing angle of the SCR.SCR1 and SCR2 in the above circuit act as a half-wave controlled rectifier circuit. When the AC voltage is applied to the circuit, the SCR is triggered and the DC voltage is fed to the DC motor. When the AC voltage passes through the negative half cycle, the SCR is turned off, and no voltage is fed to the motor. This process continues to provide the required DC voltage to the DC motor. The speed of the motor can be varied by changing the value of R1. The forward and reverse direction of the motor can be controlled by changing the firing angle of the SCR.

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The herb helpful for respiratory inflammation with discharge, loss of appetite, peptic discomforts, and flatulence is ginger.

Ginger, a commonly used herb, has been found to have various medicinal properties that can provide relief for respiratory inflammation and digestive discomforts. It has anti-inflammatory properties that can help alleviate respiratory symptoms such as discharge and inflammation. Additionally, ginger has been known to aid in reducing peptic discomforts like mild spasms of the GI tract, stomach cramps, feeling of fullness or bloating, and flatulence.

The active compounds in ginger, including gingerols and shogaols, contribute to its therapeutic effects. Ginger can be consumed in various forms, such as fresh ginger root, ginger tea, or ginger supplements, to experience its potential benefits for respiratory and digestive health.

When dealing with respiratory inflammation and digestive discomforts, incorporating ginger into your diet or using it as a natural remedy may provide relief and support overall well-being.

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Answer: 36.5N

Explanation:

Given that the side length of cube (s) = 0.155m

The buoyant force also regarded as upthrust can be explained as the upward force exerted on by a fluid on an object immersed in it.

Buoyant force is calculated using the formula :

F = density × volume × acceleration due to gravity

Density of water = 1000kg/m^3

Volume of cube = s^3

Volume = 0.155^3 = 0.003723875

Recall:

density = mass / volume

Mass = density * volume

Mass = 1000kg/m^3 * 0.003723875m^3

Mass = 3.723875kg

Buoyant force or upthrust = weight of fluid displaced.

Weight = mass * acceleration due to gravity

Buoyant force = (3.723875 * 9.8)

Buoyant force = 36.493975

= 36.5N

Answer:

b) downward. Correct choice

Explanation:

Projectile Motion

It's known as the type of motion that experiences an object that is projected near the Earth's surface and moves along a curved path exclusively under the action of gravity.

The gravity manifests through the acceleration of gravity g whose value is \(9.8 m/s^2\) and points downward. The object will eventually fall to the ground at a time and speed which depends on the initial speed and launch angle.

When the bullet is fired regardless of the initial speed and angle, the only acceleration of the system is g, thus:

b) downward. Correct choice

The acceleration acts on the bullet will be the acceleration due to gravity that is g and has a downward direction.

Since the bullet is fired at an angle of 45 so the bullet will travel in a projectile. So every point in time the acceleration due to gravity will act on the bullet.

After some point in time, the bullet will come to the surface of the earth as the energy in the bullet will reduce.

As we know that anything present on the earth is under the influence of the earth's gravity.

So the fired bullet will experience acceleration due to the gravity of the earth and the direction of the acceleration will always be downwards.

So the bullet will eventually fall to the ground at a time and speed which depends on the initial speed and launch angle.

Thus the acceleration acts on the bullet will be the acceleration due to gravity that is g and has a downward direction.

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A thin film of soap with n=1.34 hanging in the air reflects dominantly red light with λ=659 nm. The minimum thickness of the soap is 245.97 nm. in the new situation, wavelength of light in air is 718.82 nm.

To determine the minimum thickness of the soap film for it to reflect dominantly red light with a wavelength of 659 nm, we can use the concept of constructive interference in thin films.

For constructive interference to occur, the path length difference between the reflected and transmitted waves in the film should be equal to an integer multiple of the wavelength. In this case, we want to find the minimum thickness that produces constructive interference for the red light (λ = 659 nm).

The path length difference can be calculated as follows:

2 * n * t = m * λ

where n is the refractive index of the film, t is the thickness of the film, m is an integer (in this case, m = 1 for the first order maximum), and λ is the wavelength of light.

Given:

Refractive index of the soap film (n) = 1.34

Wavelength of red light (λ) = 659 nm

Plugging in the values into the equation, we can solve for the minimum thickness of the film (t):

2 * 1.34 * t = 1 * 659 nm

2.68 * t = 659 nm

t = (659 nm) / 2.68

t ≈ 245.97 nm

Therefore, the minimum thickness of the soap film for it to reflect dominantly red light with a wavelength of 659 nm is approximately 245.97 nm.

Now, if the soap film is on a sheet of glass with a refractive index of 1.46, the situation changes. The effective refractive index of the soap film on the glass will be different due to the change in medium.

To calculate the new wavelength of light that will be predominantly reflected, we can use the same equation as before:

2 * n * t = m * λ

However, now the refractive index (n) will be that of the combined system of the soap film and the glass (n = 1.46).

Given:

Refractive index of the combined system (n) = 1.46

Plugging in the values and rearranging the equation, we can solve for the new wavelength (λ) that will be predominantly reflected:

λ = (2 * n * t) / m

λ = (2 * 1.46 * 245.97 nm) / 1

λ ≈ 718.82 nm

Therefore, in the new situation where the soap film is on a sheet of glass with a refractive index of 1.46, the wavelength of light in air that will be predominantly reflected is approximately 718.82 nm.

The change in the problem compared to the previous one is the presence of the glass sheet, which affects the effective refractive index of the system.

For a maximum for the path length difference, the requirement is that the path length difference should be equal to an odd multiple of half the wavelength (λ/2). This condition is necessary for destructive interference, resulting in a minimum or no reflection.

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Answer:

Asking a question

Research existing sources

Define an hypothesis

Design and conduct a study

Draw conclusion

Report result.

Explanation:

Scientific study simply means establishing the existence or proving the veracity of an hypothesis, hence making it a fact. A scientific study follows an orders set of procedure;

Asking a question is the first step as this is what prompts the research, question usually stems after making an observation.

The a observation made and question asked will lead to making research on the observed phenomenon, this is to check if such question has been asked in the past and maybe any scientific study as been carried out in the past.

To make research further, an hypothesis is defined in a bid to find more evidence to support one's observation through experiment.

Study design and implementation is next as the type of study to be embarked upon will determine which type of design preparation and study pattern to deploy.

Conclusion a d report of observations made are the last part of a scientific study which is key as all outcomes of the study should be adequately detailed in an understandable format while also ensuring reproducibility.

Answer:

D

Explanation:

Spy gear is different from Spyware.

Answer:223.46 MJ

Explanation:

Given

The thermal conductivity of brick wall is \(k=1.16\ W/m.^{\circ}C\)

Cross-section of Wall \(A=5\m \times 7\ m\)

time period \(t=17.2\ h=17.2\times 60\times 60=61,920\ s\)

Inside temperature \(T_i=24^{\circ}C\)

Outside temperature \(T_o=8^{\circ}C\)

Heat transfer through the bricks

\(\dot{Q}=kA\dfrac{dT}{dx}\)

\(\dot{Q}=1.16\times 35\times \dfrac{16}{0.18}\\\\\dot{Q}=3608.88\ W\)

Heat flow for 17.2 h

\(Q=3608.88\times 61,920=223.46\ MJ\)

The quotation from the article that most clearly states the author's  purpose is “Woodrow started his own clothing label.”

According to the passage, starting a new business might be difficult, yet a teenager in rural South Australia is able to manage his own clothing label while also finishing high school.

Nathan Woodrow, who is now 16 and is a Year 11 student at Renmark High School, launched his own clothing line, Ryde Clothing, last year.

Teenagers and young adults who were passionate about life were his target market.

The sentence "Woodrow created his own clothing label" is the one from the article that best encapsulates the author's intention.

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Complete question - using the Author's Purpose

The author's purpose for writing this article is to

The quotation from the article that most clearly states

the author's purpose is

Getting a new business off the ground can be a challenge,

but a teenager in regional South Australia is managing to

not only run his own clothing label, but complete high

school at the same time.

Last year at the age of 16 and while studying Year 11 at

Renmark High School, Nathan Woodrow started his own

clothing label, Ryde Clothing

His target market was teenagers and young adults

wanting to grab life with a passion.

Using the motto "stay stoked" (defined by Urban

Dictionary as a state of limitless enthusiasm), Nathan

drew his clothing designs around skating, surfing and

riding

These were his passions until he a knee injury sidelined

him from sport and he ventured into the world of

business to fill the void.

Answer: the atom is mostly empty space with a tiny, dense, positively-charged nucleus

Explanation: Rutherford's gold foil experiments involved firing positively charged alpha particles at a piece of gold/metal foil. The alpha particles that were fired at the gold foil were positively charged. Most of the time, the alpha particles would pass through the foil without any change in their trajectories, which is what was expected if JJ Thomson's plum pudding model of the atom was correct. However, occasionally the alpha particles would be deflected to some degree, and sometimes an alpha particle would bounce back directly toward the experimenter. Rutherford likened this to firing a 15-inch artillery shell at a sheet of tissue paper and the shell came back to hit you.

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Rutherford's gold foil experiment demonstrated the concept of the nucleus of the atom.What is Rutherford's gold foil experiment?

Rutherford's gold foil experiment is an experiment that was conducted by Ernest Rutherford in 1911 to determine the structure of the atom. Rutherford bombarded alpha particles at thin gold foil and noted their trajectory and path.The experiment was conducted to answer the prevailing model of the atom's structure, which was the Thomson atomic model.

According to the Thomson atomic model, the atom's positive charge is evenly distributed throughout the atom, like raisins in a pudding. Rutherford's experiment refuted this hypothesis and provided a new model that supported his findings.

The findings of the gold foil experiment:

Rutherford's experiment led him to conclude that the positive charge of the atom is concentrated in the nucleus, a central part of the atom. In this model, electrons orbit the nucleus, like planets orbiting the sun.

Rutherford's gold foil experiment demonstrated that the atom is made up of mostly empty space, with a small, dense, and positively charged nucleus at the center. This discovery paved the way for further research into atomic structure and the discovery of subatomic particles like protons and neutrons.

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Answer:

It becomes less heavy

Explanation:

Hopefully it helps!

Answer:

50 kmph

Explanation:

300 / 6 = 50

Answer:

\(1275 kg*m/s\)

Explanation:

We'll use the momentum equation:

\(p=mv\)

where:

p = momentum

m = mass

v = velocity

Since we're doing the magnitude of momentum of the system, we'll add the mass of the cyclist and the mountain bike together:

\(70.0 kg + 15.0kg=85.0 kg\)

Given that, we can now substitute our given values into the momentum equation:

\(p=mv\\p=85.0kg*15.0m/s\)

Our final answer is:

\(p= 1275 kg*m/s\)

Answer:

N = q / e    where q is the total charge on the ion and e = 1.6E-19 the charge on an electron or N = coulombs / (coulombs / electron)

Answer:

Energy required = 3169.34 Joules.

Explanation:

The quantity of energy (Q) required can be determined by;

Q = mcΔθ

Where: m is the mass, c is the specific heat and Δθ is the change in temperature.

But, m = 96.7 kg, c = 0.874 J/(kg\(^{o} C\)), \(T_{2}\) = \(69.2^{o}\) and \(T_{1}\) = \(31.7^{o}\).

So that,

Q = mc(\(T_{2}\) - \(T_{1}\))

   = 96.7 x 0.874 x (\(69.2^{o}\) - \(31.7^{o}\))

  = 96.7 x 0.874 x 37.5

  = 3169.3425

Q = 3169.34

   = 3.2 KJ

The amount of energy required is 3169.34 Joules.

Answer:

plato answer.

Explanation: