a line to line fault occurs between phases a and b of a three phase generator. what is the sum of the short circuit currents through all three phases

Given that

heat capacity of water = 4200

heat capacity of aluminium = 897

heat capacity of oil = 1900

heat capacity of gold = 129

Heat capacity is the amount of heat a material absorbs to increase its temperature by 1 degree Celsius.

So, larger the heat capacity of a material lower will be the temperature change.

If equal amount of energy is applied to the materials, then gold will have the greatest temperature change as its heat capacity is lowest than other materials.

Given,

The mass of the box, m=35.0 kg

The height to which the box was lifted, h=1.75 m

Potential energy is the energy possessed by an object due to its position.

The gravitational potential energy gained by the box is,

Where g is the acceleration due to gravity.

On substituting the known values,

Thus the gravitational potential energy gained by the box is 600.25 J

Answer:light

Explanation:

Answer:

elastic collision

Explanation:

By using this formula =Diameter = Diameter = Known Field Diameter × (Known Magnification / Unknown Magnification)
, you can calculate the diameter of an unknown microscope field, allowing you to estimate the size of the objects you're observing under different magnification levels.

.To calculate the diameter of an unknown microscope field, you can use the formula:

Unknown Field Diameter = Known Field Diameter × (Known Magnification / Unknown Magnification)

Here's a step-by-step explanation of the formula:

1. Determine the known field diameter: This is the diameter of the field of view under a certain magnification, which is usually provided by the microscope manufacturer or can be measured experimentally.

2. Determine the known magnification: This is the magnification level at which the known field diameter was measured.

3. Determine the unknown magnification: This is the magnification level at which you want to calculate the unknown field diameter.

4. Plug the values into the formula and solve for the unknown field diameter.

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An inflated beach ball pushed beneath the water surface will swiftly shoot above the water surface when released due to the principle of buoyancy.

Buoyancy is a physical phenomenon that describes the upward force this is exerted on an item submerged in a fluid, inclusive of water or air. This pressure is a result of the pressure differences between the top and backside of an item in a fluid, and it is referred to as buoyant pressure.

Here, the beach ball is pushed beneath the water surface, it displaces a certain amount of water which will weight more than the beach ball itself. This cause acceleration upwards towards the surface when ball released.

If the object is less dense than the liquid, it will float. if the object is more dense than the liquid, it will sink.

Beach ball has a lower density than the water it displaces. So the buoyant force is so higher than a solid object of the same size and weight. The combination of buoyancy and the low density of air inside the beach ball causes it to shoot up quickly to the water surface when released.

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The distance from the axis of the force applied is 2.05 m.

The distance from the axis of the force applied is calculated as follows;

The formula for torque;

τ = Fr

where;

Another formula for torque is given as;

τ = Iα

where;

τ = (mr²)α

τ = (25 kg x (0.925 m)²) x (1.84 rad/s²)

τ = 39.36 Nm

The distance is calculated as;

r = τ/F

r = ( 39.36 Nm ) / (19.2 N)

r = 2.05 m

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Large-scale structure in the universe has probably been shaped primarily by the gravity of dark matter.

Dark matter constitutes a considerable part of the total mass of the universe and is, therefore, the dominant contributor to the gravitational field in the universe. The visible matter that we can see, like stars and galaxies, constitutes only about 15% of the total matter of the universe, the rest is dark matter. The gravity of dark matter is responsible for shaping the large-scale structure of the universe, such as the formation of clusters, galaxies, and superclusters.

These structures are formed due to the gravitational attraction of dark matter, which pulls matter together over long distances. This explains why galaxies and galaxy clusters tend to be distributed in a web-like structure, with vast voids of space in between them. In conclusion, the gravity of dark matter is responsible for shaping the large-scale structure of the universe. This is due to its dominant contribution to the total mass of the universe, which makes it the most significant contributor to the gravitational field in the universe.

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Answer:

The laws of liquid pressure are  

(i) Pressure inside the liquid increases with the depth from the free surface of the liquid.

(ii) Pressure is same at all points on a horizontal plane, in case of stationary liquid.

(iii) Pressure is same in all directions about a point inside the liquid.

(iv) Pressure at same depth is different in different liquids. It increases with the increase in the density of the liquid.

(v) A liquid will always seek its own level.

A Fluid is any liquid or gas or generally any material that cannot sustain a tangential, or shearing, force when at rest.  

Explanation:

Answer: 0.47 kg

Explanation:

A force on a magnet occurs when it is moved near a coil of wire due to electromagnetic induction.

When a magnet is moved near a coil of wire, the changing magnetic field created by the movement of the magnet induces an electric current in the wire. This induced current, in turn, generates its own magnetic field, which opposes the change in the original magnetic field according to Lenz's law. This interaction between the magnetic fields creates a force on the magnet.

The force on a magnet when moved near a coil of wire results from the electromagnetic induction and the interaction of magnetic fields due to the induced current in the wire.

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The man has a maximum time of approximately 1.979 seconds to get out of the way before the cement block reaches the ground.

To determine the maximum time the man has to get out of the way, we need to calculate the time it takes for the cement block to fall from a height of 19.2 m to the ground.

The time it takes for an object to fall freely under gravity can be found using the equation:

h = (1/2) * g * t^2

where h is the height, g is the acceleration due to gravity (approximately 9.8 m/s^2), and t is the time.

Rearranging the equation, we get:

t = sqrt(2h/g)

Plugging in the values, we have:

t = sqrt(2 * 19.2 / 9.8)

t ≈ sqrt(3.918)

t ≈ 1.979 seconds

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Answer:

here Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water. These negative impacts can affect human behavior and can prompt mass migrations or battles over clean water.

Explanation:

The soil used for making pots by potters is commonly known as "Potter's Clay" or "Potter's Soil."

Characteristics of Potter's Clay:

1. Plasticity: Potter's clay has high plasticity, which means it can be easily molded and shaped into different forms without cracking or breaking.

2. Cohesiveness: It exhibits good cohesion, allowing the clay particles to stick together when moistened, forming a workable material.

3. Fine Particle Size: Potter's clay consists of fine particles that contribute to its plasticity and workability.

4. High Water Retention: It has the ability to retain water, which helps maintain the moisture content necessary for the clay to be shaped and formed.

5. Low Shrinkage: Potter's clay exhibits low shrinkage when it dries or undergoes firing, ensuring minimal distortion or cracking during the drying and firing processes.

6. Good Bonding Properties: The clay particles have the ability to bond together, creating a strong and durable structure once fired.

7. Good Porosity: After firing, the clay retains some porosity, allowing the pot to breathe and allowing for the exchange of air and moisture.

Answer:

6.9 m/s

Explanation:

Answer:

All the spheres interact with other spheres.

Explanation:

Rain (hydrosphere) falls from the clouds in the atmosphere to the lithosphere and then forms streams and and rivers that provide drinking water for wildlife and humans and water for plants and crops to grow.

Answer:

Explanation:

The solar nebula hypothesis offers the following explanation for the different compositions of the two types of planets: the solar nebula theory suggests that the solar system formed from a nebula, which is a rotating cloud of gas and dust.

The nebula was created from the remnants of a supernova.

The cloud of gas and dust collapsed under its gravity, which formed a protoplanetary disc.

The centre of the disc eventually became the sun, and the rest of the disc formed the planets, including the two types: terrestrial and Jovian.

The terrestrial planets, such as Earth, Mars, Venus and Mercury, are rocky planets and are located closer to the sun.

In contrast, Jovian planets, such as Jupiter, Saturn, Uranus, and Neptune, are gas giants that are located further away from the sun.

They have a lower density, as well as a much larger size, as they are primarily composed of gas, hydrogen, helium, and methane.

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Without calibration, the data would no longer be accurate since it would deviate from real values. Therefore, calibration is occasionally required.

It converts an applied mechanical force—such as load, weight, tension, compression, or pressure—into another physical variable—in this case, an electrical output signal—that can be measured, converted, and standardized. The electrical signal changes in direct proportion to the force acting on the sensor.

A load cell or weight sensor is often referred to as a force sensor. They are employed to gauge load, strain, and compression. A lot of them contain internal strain gauges that are attached to the metal structure and respond even to the smallest compression changing the resistance and reporting on the outcomes.

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The forces that stop your car during a crash are greatest in a head-on collision with another vehicle or a large immovable object because of the rapid deceleration and the transfer of momentum between the colliding objects.

During a head-on collision, the initial velocity of the vehicle is quickly reduced to zero as it comes into contact with another object. The force experienced by the car and its occupants is a result of the momentum change, which is determined by the mass and the change in velocity.

Since the car is decelerating rapidly, the force experienced will be significantly larger in comparison to other types of collisions, such as a side or rear-end impact.

In addition, when two vehicles collide head-on or when a vehicle collides with an immovable object, the momentum is transferred between the objects. This transfer of momentum further increases the forces experienced during the collision, making it more severe.

The forces that stop a car during a crash are greatest in a head-on collision with another vehicle or a large immovable object due to the rapid deceleration and the transfer of momentum between the colliding objects. These factors contribute to the increased severity of the impact and the potential for greater damage and injury.

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1.9 kg*m/s

As we know that momentum is directly proportional to Mass and Velocity

Momentum= k*M*V

where k is the proportional constant, which is equal to 1 in this case.

(M*V). And by now if we talk about Unit then Mass has SI Unit as Kg. and Velocity have as m/s

I option 1 we unit as m/s  which simply shows the unit of Velocity. whereas option 2 is 2.4 kg/m which is not true as we already calculated as it must be kgm/s similarly in the case of option 3 2kg/s which again is not exactly the same SI unit of what we calculated before using equating the equation.

we can calculate the Kinetic energy by multiplying moment by Velocity and dividing 2.

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Answer:

bro we cant do this

Explanation:

Answer:

The energy resource brought into a coal power plant is coal.

Found the answer at: https://www.tva.com/energy/our-power-system/coal/how-a-coal-plant-works#:~:text=Coal%2Dfired%20plants%20produce%20electricity,to%20start%20the%20process%20over.

The waste produced by coal power plants is coal ash and the energy produced by coal power plants is electricity.

Answers found at: http://www.groundtruthtrekking.org/Issues/AlaskaCoal/Coal-Ash-Combustion-Wastes.html       and        https://www.tva.com/energy/our-power-system/coal/how-a-coal-plant-works#:~:text=Coal%2Dfired%20plants%20produce%20electricity,to%20start%20the%20process%20over.

The two laws of thermodynamics apply to what I found out in my research because I know that the entropy increase due to the combustion of conventional fuels is much larger than that resulting from that of nuclear fuels, and is therefore much more dangerous. Also, I know that heat is used to burn coal and create energy.

Found answer at: https://www.encyclopedie-energie.org/en/energy-consumption-and-entropy-release-in-the-biosphere/

Explanation:

Hope this helps, i got an okay score on it but better than nothing i guess lol

Background: Nuclear energy can be used for various industrial applications, such as seawater desalination, hydrogen production, district heating or cooling, the extraction of tertiary oil resources and process heat applications such as cogeneration, coal to liquids conversion and assistance in the synthesis of chemical ...

Answer:

263.15

. . . . . . . . . ..  ... . . . . . .. . . . . . . . ... .

Rare metals are needed for electric vehicle components, and their recovery calls for mining techniques that harm the environment. Among the effects were water pollution, erosion, and habitat loss.

The word "elektron," which signifies amber, is where it got its name. The yellow fossilized rock known as amber is found in tree sap. The Greeks discovered that light materials (like straw or feathers) will stick to amber when it was rubbed against wool. Static electricity is the name given to this type of electricity.

Electric energy is a term of kinetic energy because the charges that generate it are in motion. Electrical energy can be seen in action in things like lightning, batteries, and even electric eels!

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Answer:

the statement is false that massive stars have low absolute brightness.

Explanation:

The brightness of the luminous intensity depends on the distance between the star and the observer. The intensity is directly proportional to the square of the distance between the observer and the star.

Answer:

In vector form:

S=30j^+20i^+302cos45o(−i^)+302sin45o(−j^)

=30j^+20i^−30i^−30j^

=10i^

Explanation:

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