14.Figure shows a magnetic field associated with a rectangular coil directed into the plane of the

paper.

(a) What would be the effect if the coil moves towards right? 1 mark

(b) Name the phenomenon responsible for the above observation. 1 mark

(c)(i) State the rule that is used to determine the direction of current produced in the phenomenon.

The wavelength for a sound wave with a frequency of 485 Hz. That has a sound wave in the air has a frequency of 420 Hz is 70.7cm and 81.7cm.

Wavelength = speed of sound/frequency

The speed of sound is approximately 343 meters per second.

For a sound wave with a frequency of 485 Hz, the wavelength would be:

wavelength = 343 m/s / 485 Hz = 0.707 m or 70.7 cm

For a sound wave in air with a frequency of 420 Hz, the wavelength would be:

wavelength = 343 m/s / 420 Hz = 0.817 m or 81.7 cm.

Wavelength is a fundamental concept in physics that refers to the distance between two consecutive points on a wave that is in phase, meaning that they are at the same point in their respective cycles. It is usually denoted by the Greek letter lambda (λ).

Wavelength is an important property of all types of waves, including electromagnetic waves (such as light), sound waves, and even waves in water. In general, the wavelength of a wave is inversely proportional to its frequency, which is the number of cycles that occur per unit of time. This means that waves with a higher frequency have a shorter wavelength, while waves with a lower frequency have a longer wavelength.

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(a) The hot resistance of the headlight is 1.45 Ω.

(b) The current flowing through the headlight is 4.2 A.

(a) To find the hot resistance of the headlight, we can use the formula:

Power = Voltage² / Resistance, where Power = 27.5 W and Voltage = 6.15 V.

Rearrange the formula to solve for Resistance:

Resistance = Voltage² / Power = (6.15 V)² / 27.5 W = 37.8225 / 27.5 ≈ 1.45 Ω.

(b) To find the current flowing through the headlight, we can use Ohm's Law:

Voltage = Current × Resistance, where Voltage = 6.15 V and Resistance = 1.45 Ω.

Rearrange the formula to solve for Current:

Current = Voltage / Resistance = 6.15 V / 1.45 Ω ≈ 4.2 A.

The hot resistance of a 27.5 W headlight in a car with a 6.15 V electrical system is approximately 1.45 Ω, and the current flowing through it is approximately 4.2 A.

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We know that the final velocity of the object is 18 m/s in a direction of 47° from the x-axis; this means that the final velocity as vector is:

Now, since the acceleration is along the x-axis this means the the y-component of the initial velocity remains constant; hence the y-component of the final velocity is the same as the y-component of the initial velocity. This also means that the x-component is the only one that changes; since the acceleration is constant throught the 2.7 seconds we can use the formula:

To find the x-component of the initial velocity:

Therefore the initial velocity is:

Its magnitude is:

Therefore the magnitude of the initial velocity is 22.04 m/s.

Answer:

120.48hz

Explanation:

f=1/t..........

Either the wavelength, velocity, or wave period—the amount of time it takes for a wave cycle to complete—must be known. If you know the period, divide 1 by it and, if necessary, convert it to seconds. The outcome will be the frequency in Hertz.

As with all waves, the relationship between the speed of sound, its frequency, and its wavelength is vw=f, where vw is the speed of sound, f is the frequency, and is the wavelength.It is necessary to know either the wavelength, the velocity, or the wave period, which is the duration of a wave cycle.

Therefore, More oscillations are produced at higher frequencies. Hertz are the frequency measurement units (Hz). Noises between 20 Hz and 20,000 Hz can be heard by those with normal hearing. Ultrasound is a term for frequencies greater than 20,000 Hz.

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The 0 to 60 mph time of a car can be improved by a significant amount when a 168 hp engine is installed. .

Mph is an abbreviation for miles per hour, which is a unit of speed used to measure the speed of an object in motion. MPH is typically used to measure the speed of vehicles, but it can also be used to measure the speed of athletes, animals, and other objects.

Depending on the type of car, the 0 to 60 mph time can be improved by up to 4-5 seconds. For example, a Mini Cooper S with a 168 hp engine would be able to reach 60 mph in 6.6 seconds, compared to the previous 9.2 seconds with the base engine. This is an improvement of nearly 3 seconds, which is a huge difference. Additionally, the top speed of the car would be increased by up to 15 mph, as the car would be able to reach higher speeds with the more powerful engine.

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Answer:

As the temperature increases, the volume of the material also increases. This is known as thermal expansion. It can also be explained as the fractional change in the length or volume per unit change in the temperature.

The relation between alpha, beta, and gamma is given in the form of a ratio and the ratio is 1:2:3 and can be expressed as:

alpha=fracbeta2=fracgamma3

Following is the relation between the three:

L = L (1 + α.ΔT)

Where, α is the coefficient of linear expansion  

A = A (1 + β.ΔT)

Where, β is the coefficient of aerial expansion

V = V (1 + γ.ΔT)

Where, γ is the coefficient of cubical expansion  

V = V + γV.ΔT

V = V (1 + γ.ΔT)  

L3 = L3 (1 + α.ΔT)3

L3 = L3 (1 + 3α.ΔT + 3α2.ΔT2 + α3.ΔT3)

L3 = L3 (1 + 3α.ΔT)

Alpha, beta, and gamma are related to one another in the form of a ratio, and that ratio is 1:2:3, and yes they are universal constants.

A substance's volume expands while its mass stays constant. Heating is typically the cause of expansion. When a substance is heated, the molecular bonds separating its particles weaken, the particles move more quickly, and the substance expands as a result.

Determine the relation as shown below,

L = L (1 + α × Δ T)

here, α is the coefficient of linear expansion  

A = A (1 + β × Δ T)

here, β is the coefficient of aerial expansion

V = V (1 + γ × Δ T)

here, γ is the coefficient of cubical expansion  

V = V + γ × V × Δ T

V = V (1 + γ × ΔT)  

L3 = L3 (1 + α × Δ T)3

L3 = L3 (1 + 3α × ΔT + 3α2 × ΔT2 + α3 × ΔT3)

L3 = L3 (1 + 3α × Δ T)

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To achieve total internal reflection, the minimum refractive index of the plastic must be at least 0.869 when a ray of light is incident at an angle of 61 degrees on the center of one side of the plastic slab in air.

The minimum refractive index of the plastic can be found , we need to consider the conditions for total internal reflection.

Total internal reflection occurs when the angle of incidence is greater than the critical angle, which is the angle at which the refracted ray is at a 90-degree angle to the normal.

In this scenario, the ray of light is incident on the plastic at an angle of 61 degrees. We can use Snell's law to relate the angle of incidence to the angle of refraction:

n1 * sin(angle of incidence) = n2 * sin(angle of refraction)

Here, n1 is the refractive index of air (approximately 1), and n2 is the refractive index of the plastic.

Since we want the light to be totally internally reflected, the angle of refraction will be 90 degrees. Thus, we have:

1 * sin(61 degrees) = n2 * sin(90 degrees)

Rearranging the equation, we get:

n2 = sin(61 degrees) / sin(90 degrees)

Calculating this expression, we find that n2 is approximately 0.869.

Therefore, the minimum refractive index of the plastic should be at least 0.869 to ensure total internal reflection in this scenario.

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Complete question:

A ray of light is incident on a square slab of transparent plastic in air. It strikes the center of one side at an angle of 61 degrees. Find the minimum refractive index of the plastic if the light is to be totally internally reflected.

The magnitude of the radial force on the mass can be calculated using the formula:

Fr = mrω²

Where Fr is the magnitude of the radial force, m is the mass, r is the radius of the circular path, and ω is the angular speed.

In this case, we know that the mass is 4.00 kg and the angular speed is 5.00 rad/sec. To find the radius of the circular path, we can use the formula for linear speed:

v = ωr

Where v is the linear speed and r is the radius.

We know that the linear speed is 5.00 m/sec and the angular speed is 5.00 rad/sec, so we can plug these values in and solve for r:

5.00 m/sec = 5.00 rad/sec x r

r = 1.00 m

Now we can plug in the values for m, ω, and r into the formula for the magnitude of the radial force:

Fr = (4.00 kg) x (5.00 rad/sec)² x (1.00 m)

Fr = 100 N

Therefore, the magnitude of the radial force on the mass is 100 N.

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Given,

The length of the slab, L=12 m

The initial temperature, T₁=10°C

The final temperature, T₂=30°C

The coefficient of the linear expansion of the concrete is α=12×10⁻⁶ /°C

The change in the length of the slab is given by,

Where ΔT is the change in the temperature.

Therefore,

On substituting the known values,

Thus the expansion in the length of the slab in the given temperature range is 0.003 m.

Thus the gap between the slabs should be 0.003 m

Answer:

If research results can be replicated, it means they are more likely to be correct.

Answer: There are many things that have to be checked in order to know

Explanation:

For repeatability to be established, the following conditions must be in place: the same location; the same measurement procedure; the same observer; the same measuring instrument, used under the same conditions; and repetition over a short period of time.

Hope this helps!

Pls Mark me brainliest

Given that the mass of the car is m = 2000 kg and initial speed u = 20 m/s.

Here, three values of time are given.

(a) t1 = 10 s

(b) t2 = 4 s

(c) t3 = 1.2 s

In all three cases, the final velocity vis zero.

Impulse = change in momentum

= mv-mu

If the time duration is increased then force will be decreased as

Force will be lowest for 10s and greatest for 1.2 s.

The impulse will be the same for all three cases as the change in momentum is the same.

Maximally Enhanced Signal: x = 60.6m, 56.1m, and 52.8m; Cancelled Signal: x ≈ 58.6m and 63.5m.

We can use the concept of interference of waves to solve this problem. The radio waves emitted by transmitters A and B are in-phase, which means that they have the same frequency, wavelength, and polarization. When these waves meet, they interfere with each other constructively or destructively depending on their relative phase difference.

Let's consider the point where the person is equidistant from both transmitters A and B. At this point, the waves from A and B will arrive at the same time and in-phase, resulting in constructive interference and maximum signal strength.

As the person starts walking towards transmitter B, she gets closer to it and farther away from transmitter A. This changes the path length difference between the waves from A and B, causing a phase shift between them. If the path length difference is a multiple of the wavelength, the waves will be back in-phase and constructive interference will occur again, resulting in maximum signal strength. On the other hand, if the path length difference is half of a wavelength, the waves will be out-of-phase and destructive interference will occur, resulting in minimum or zero signal strength.

Let x be the distance between the person and transmitter A. The path length difference between the waves from A and B is then given by:

ΔL = AB - (sqrt(x^2 + 50^2) - 50)

where AB is the distance between transmitters A and B, and sqrt(x^2 + 50^2) is the distance between the person and transmitter A using the Pythagorean theorem.

The wavelength of the radio waves emitted by transmitters A and B is given by:

λ = c/f

where c is the speed of light, and f is the frequency of the waves.

Substituting the given values, we get:

λ = c/f = 3.2 m

For constructive interference to occur, the path length difference ΔL must be an integer multiple of the wavelength, i.e.,

ΔL = mλ

where m is an integer.

For destructive interference to occur, the path length difference ΔL must be a half-integer multiple of the wavelength, i.e.,

ΔL = (m + 0.5)λ

where m is an integer.

Now, let's solve the problem for the given range of x values:

The condition for constructive interference is:

ΔL = mλ

Substituting the values and solving for x, we get:

AB - (sqrt(x^2 + 50^2) - 50) = mλ

11 - (sqrt(x^2 + 2500) - 50) = m(3.2)

Simplifying and solving for x, we get:

x = sqrt((11 - m(3.2) + 50)^2 - 2500)

We need to find the values of x that satisfy the given range of 50.0m ≤ x ≤ 65.0m.

For m = 0, we get:

x = sqrt((11 - 0 + 50)^2 - 2500) = 60.6 m

For m = 1, we get:

x = sqrt((11 - 3.2 + 50)^2 - 2500) = 56.1 m

For m = 2, we get:

x = sqrt((11 - 6.4 + 50)^2 - 2500) = 52.8 m

These are the only values of x that satisfy the given range and result in maximum signal strength.

The condition for destructive interference is:

ΔL = (m + 0.5)λ

Substituting the values and solving for x, we get:

AB - (sqrt(x^2 + 50^2) - 50) = (m + 0.5)λ

11 - (sqrt(x^2 + 2500) - 50) = (m + 0.5)(3.2)

Simplifying and solving for x, we get:

x = sqrt((11 - (m + 0.5)(3.2) + 50)^2 - 2500)

We need to find the values of x that satisfy the given range of 50.0m ≤ x ≤ 65.0m.

For m = 0, we get:

x = sqrt((11 - 0.5(3.2) + 50)^2 - 2500) ≈ 58.6 m

For m = 1, we get:

x = sqrt((11 - 4.7 + 50)^2 - 2500) ≈ 63.5

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Answer:

80cm per second

Explanation:

Answer:

potential energy is transformed into kinetic energy

To determine the initial temperature of the metal required to vaporize a given amount of water, we can use the equation for heat gained or lost during a phase change:

q = mΔH

where q is the heat gained or lost, m is the mass of the substance, and ΔH is the heat of fusion or vaporization.

ρ = ρ0[1 - β(T - T0)

T0 = (31.67 kJ) / (m(c) )

T0 = (31.67 kJ) / (m(c) )

T0 = (31.67 kJ) / (0.100 kg x 0.385 J/g°C )

T0 = 821.7 °C

Therefore, the initial temperature of the metal should be approximately 821.7 °C in order to vaporize 20.54 mL of water initially at 75.0 °C, assuming that the final vapor temperature is 100 °C.

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Answer:

1.29 moles

0.753 moles

0.745 moles

Explanation:

PV=nRT

n=PV/RT

n=(1)(34.2)/(0.0821)(323.7)

n=1.29

n=PV/RT

n=(1)(22.4)=(0.0821)(362.15)

n=0.753

n=PV/RT

n=(1)(16.7)/(0.0821)(273.15)

n=0.745

In the ideal gas equation, T is measured in Kelvin.

Answer:

I think B but im not sure

Explanation:

Answer: i think both mirrors are used to reflect the beam of light.

Explanation:

gr 10 science right? im almost done the semester and i learnt this already so i think the best answer is the last one

Air resistance occurs when a ball is thrown vertically upward into the air; this causes the ball to move more slowly both up and down. As a result, when it reaches its beginning level, it moves slower than before.

The quantity of air resistance is affected by a number of variables, including the ball's size and shape, the air's density, and its speed. As a result, without further information, it is challenging to estimate the precise amount of speed loss. Yet we can draw some broad conclusions. The speed of the ball reduces as it rises until it reaches its highest point, at which point it briefly stops and starts to descend. The ball drops.

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Answer:

Traveled = 6 steps     displacement = 0    

Explanation:

see attached 'sketch'

The correct answer of Gravitational Field Strength is shared in graph. (image attached)

What is Gravitational Field Strength?

The influence that a large body has on the area surrounding it, exerting a force on another large body, is described by the gravitational field. As a result, a gravitational field, which is measured in newtons per kilogramme, is

weight/mass = gravitational field strength

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To win a  driver negligence claim, the victim (plaintiff) must prove four things: OBLIGATIONS, BREACH OF DUTY, CAUSE OF INJURY AND DAMAGE.

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An object's loss in gravitational potential energy as it descends freely close to the surface of the earth is equal to its "kinetic energy."

Both in the scientific and common sense, climbing stairs as well as lifting objects count as work because they both involve exerting force against gravity. Energy undergoes a transition when work is done.

Thus, an object's loss in gravitational potential energy as it descends freely close to the surface of the earth is equal to its kinetic energy.

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The complete question is-

As an objects falls freely near earths surface the loss in gravitational potential energy of the objects is equal to its _______.

Answer:

0.00176

Explanation:

Credit to the person above.

Answer:

Kinetic energy decreases as you go up hill

Potential energy increases as you go up hill

Answer:

17 m/s west

Explanation:

Runner 1 has velocity = 10 m/s west

runner 2 has velocity = 7 m/s east

From the frame of reference of runner 2, we can imagine runner 2 as standing still, and runner 1 moving away from him, towards the west with their combined velocity of

velocity = 10 m/s + 7 m/s = 17 m/s west

Answer:

17 m/s west

Explanation:

Hope this helps!

The evolution of energy matrices, the social and environmental consequences of energy sources, and the relationship between energy development and industrial development are critical aspects of understanding the interplay between energy and the modern world. Balancing the need for energy with sustainability and minimizing environmental impacts is a key challenge for societies today.

a) The evolution of the main energy matrices after the industrial revolution:

The industrial revolution marked a significant shift in the sources of energy used to power the growing industries and societies. Prior to the industrial revolution, human and animal labor, along with limited use of water and wind power, were the primary sources of energy. However, with the advent of steam engines and mechanization, there was a need for more abundant and efficient sources of energy.

Coal: Coal became the dominant energy source during the early stages of the industrial revolution. It provided the necessary fuel for steam engines and played a crucial role in powering factories, railways, and steamships.

Oil: The discovery and commercialization of oil in the late 19th century revolutionized the energy landscape. Oil became a major source of energy for transportation, as it fueled the internal combustion engines of automobiles, trucks, and airplanes.

Natural Gas: With the expansion of oil drilling, natural gas also emerged as an important energy source. It is used for heating, electricity generation, and as a feedstock for various industrial processes.

Nuclear Energy: The development of nuclear power in the mid-20th century introduced a new source of energy. Nuclear reactors harness the energy released from nuclear fission reactions to generate electricity.

Renewable Energy: In recent decades, there has been a growing emphasis on renewable energy sources such as solar, wind, hydroelectric, and geothermal power. These sources offer sustainable alternatives to fossil fuels, with lower environmental impact and the potential for long-term energy security.

b) The social and environmental consequences of these energy sources:

Each energy source has its own social and environmental consequences:

Fossil Fuels: The burning of fossil fuels, such as coal, oil, and natural gas, releases greenhouse gases and contributes to climate change. Extraction of fossil fuels can lead to habitat destruction, water pollution, and health hazards for workers and nearby communities.

Nuclear Energy: While nuclear energy does not produce greenhouse gas emissions during operation, it presents risks associated with accidents, radioactive waste disposal, and potential weaponization of nuclear materials. Public safety concerns and environmental risks have led to debates over the use of nuclear power.

Renewable Energy: Renewable energy sources offer benefits in terms of reduced greenhouse gas emissions and environmental sustainability. However, their deployment may require land use changes, and some technologies (e.g., large-scale hydroelectric dams) can cause ecological disruptions and displacement of communities.

c) The relationship between energy development and degree of industrial development:

Energy development and industrial development are closely intertwined. The availability of affordable and reliable energy sources is crucial for driving industrialization and economic growth. Access to abundant energy resources enables countries to power their industries, expand transportation networks, and improve living standards.

Countries that have invested in the development and exploitation of energy sources have typically experienced accelerated industrialization and technological advancement. The ability to secure and utilize energy resources efficiently has been a determining factor in a country's competitiveness and economic prosperity.

Conversely, countries that lack access to energy sources or fail to invest in their energy sectors may face challenges in industrial development. Limited energy availability can constrain production capacities, limit access to modern technologies, and hinder economic progress.

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Answer: .0286 web0ers/m^2

Explanation:

Answer:

Tstring = 343.35 [N].

Explanation:

Since the block is in equilibrium, we can say that the sum of the forces on the Y-axis or vertical is equal to zero.

∑Fy = 0

\(T_{string}-W=0\)

where:

Tstring = tension of the string [N]

W = weight of the block [N]

And the weight can be calculated multiplying the mass of the block by the gravity acceleration.

Now replacing:

\(T_{string}=m*g\\T_{string}=35*9.81\\T_{string}=343.35[N]\)

If the resistance remains constant and the voltage doubles, the power will increase by a factor of 4 (option E)

The following data were obtained from the question:

P = V² / R

Resistance is constant, we have

V₁² / P₁ = V₂² / P₂

V² / P = (2V)² / P₂

V² / P = 4V² / P₂

Cross multiply

V² × P₂ = P × 4V²

Divide both side by V²

P₂ = P × 4V² / V²

P₂ = P × 4

From the above, we can conclude that the power will increase by a factor of 4 (option E)

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