Figure 3 shows a 4 pole 3-phase squirrel cage induction motor with an output of 20 KW, wired in a Delta connected to a 400V 50Hz supply. If the motor operates at an efficiency of 85% and a power factor of 0.7 at a slip of 4%, Calculate: a The phase current in the motor stator windings.

Usually, electric heaters are used. Compared to fossil fuel heating equipment, it is more affordable to buy but more expensive to run.

Any type of biologically derived hydrocarbon-containing fuel that is found in the Earth's crust and can be used as an energy source is referred to as a fossil fuel.

Oil shales, bitumen, tar sands, and heavy oils are examples of fossil fuels along with coal, petroleum, natural gas, and petroleum. All of them include carbon and were created by geologic processes acting on the remains of organic matter produced by photosynthesis, a process that started in the Archean Eon (4.0 billion to 2.5 billion years ago). Before the Devonian Period (419.2 to 358.9 million years ago), the majority of carbonaceous material came from bacteria and algae, but the majority of carbonaceous material that formed during and after that time came from plants.

Learn more about fossil fuel here:

https://brainly.com/question/29608326

#SPJ4

A Master Cylinder with an internal leak can have all of the following symptoms except: D. pedal regains firmness after being released and repressed.

A braking system can be defined as a mechanical system which comprises various components that are designed and developed to bring an automobile vehicle in motion to a stop, when applied by a driver.

In order for a technician to diagnose a brake system, the following symptoms should be adequately and appropriately checked and used by the technician:

Generally speaking, a Master Cylinder is an important component of an automobile vehicle's braking system which is designed and developed to transform (convert) mechanical pressure generated by the brake pedal into hydraulic pressure.

In Automobile engineering, a Master Cylinder with an internal leak can have all of the following symptoms:

Read more on braking system and Master Cylinder here: https://brainly.com/question/14237448

#SPJ1

Answer:

Diameter of pipe is 0.535 ft

Explanation:

see attachment, its works out 1st half

The classification of the working surfaces are as follows;

A working surface is a flat surface on which various activities can be carried out.

In a construction system, the duty carried on a particular working surface varies from another. They can be categorized into heavy-duty, medium-duty, light-duty, and very light-duty.

The classification of the working surfaces are as follows;

Learn more about the working surface here:

https://brainly.com/question/16508484

Two possible positive values of Ω0 that could have resulted in the sequence X[N] are π/4 and 5π/4.

The relation between the continuous-time signal and the discrete-time signal is given by the sampling theorem, which states that a continuous-time signal can be perfectly reconstructed from its samples if the sampling rate is greater than twice the highest frequency present in the signal. This highest frequency present in the signal is known as the "Nyquist frequency" and is given by:

ΩNy = 2πfNy = πfS/2

where fS is the sampling frequency.

In this case, the sampling frequency is given as 1000 samples/s, so the Nyquist frequency is:

ΩNy = π(1000)/2 = 500π rad/s

Since the discrete-time signal x[n] is given as x[n] = cos(π/4n), we can deduce that the highest frequency present in the continuous-time signal is π/4, which is less than the Nyquist frequency. Therefore, the signal can be perfectly reconstructed from its samples.

Thus the possible values of Ω0 are the frequency of the discrete-time signal which is:

Ω0 = π/4, and

Ω0 = 5π/4

So, two possible positive values of Ω0 that could have resulted in the sequence X[N] are π/4 and 5π/4.

Learn more about Nyquist frequency in brainly.com/question/28592924

#SPJ1

Answer:

c. the U.S. Constitution.

Explanation:

A Constitution refers to a set of written laws and principles which is typically used to determine the power and authority of the government, as well as guarantee the fundamental rights of its citizens.

Basically, the Constitution accords powers to the national or federal government and these includes; enumerated or delegated, reflected, and concurrent powers. Therefore, base on the US Constitution, any law, act, or license issued and approved by the federal government supercedes or overrides any state law.

In this scenario, NatGas Corporation obtains a federal license to operate a gas pipeline through a certain area of Oregon. The Oregon state legislature enacts a law that bans gas pipelines in that area. Most likely, the state law violates the U.S. Constitution because a federal law is supreme.

HP Fiberglass Insulation is superior for sound control and has a better thermal property.

Fiberglass is a better insulator than wood. It is available in various widths, with the widest being 3/4 inch and having an R-value of 0.94. However, the R-value of fiberglass, the thinnest of which is 3/4 inch, is 3. Fiberglass is a superior insulator as a result.

Thus, option B is correct.

For more details about Fiberglass Insulation, click here:

https://brainly.com/question/14040359

#SPJ1

Answer:

Lack of fluid oil – lack of fluid oil in your vehicle, or a fluid leakage, can lead to heavy steering. If there is a lack of fluid oil, or a leak, this can reduce the pressure in the system, meaning the steering wheel does not receive enough supply of fluid to perform freely.

Answer:

attached below

Explanation:

Given data:

Gaged flow = 52 m^3 / sec

Depth covering drainage area = 1450 km^2

Develop a 24-hour rainfall duration unit hydrograph for the watershed using observed hydorgraph

Runoff flow = gaged flow - base flows

                   = 52 - 52 = 0 m^3/sec

For 18 hours time duration

Direct runoff volume ( Vr ) = ∑ ( QΔt1 )

where Δt = 6

           ∑Q = 3666 m^3/sec

hence Vr = Δt * ∑Q  = 79185600 m^3

Next we will convert the Direct runoff volume to its equivalent depth covering the drainage area

= Vr / drainage area depth

= 79185600 / 1450000000 = 5.46 cm

Next we will find the unit hydrograph flows by applying the relation below

\(Q_{1.0cm} = Q_{5.46cm} (\frac{1.0cm}{5.46cm} )\)

where 14m^3/sec = \(Q_{5.6cm}\)

input value back to the above relation

\(Q_{1.0cm} = 2.57 m^3/sec\)

Attached below is The remaining part of the solution  tabulated below

and A graph of the unit hydorgraph for the given watershed

Note :

Base  flow total = 1560

UH total = 671.30

The building envelope is an essential component of any structure, providing a protective barrier between the interior and exterior of the building. By controlling the flow of air, moisture, and heat, the building envelope ensures the indoor air quality and energy efficiency of the building.

The components of the building envelope include the walls, roofs, windows, doors, and foundation of the building, as well as insulation and other materials. The primary purpose of the building envelope is to provide a protective barrier against the elements, ensuring the interior of the building is insulated from the outside climate. The building envelope also helps to maintain indoor air quality, as it reduces the amount of air infiltration from outside. In addition, the building envelope increases the efficiency of the building’s heating and cooling systems, reducing energy consumption and costs.

In order to maintain its protective barrier, the building envelope must be constructed with durable and weather-resistant materials. Additionally, the building envelope should be properly sealed to reduce air leakage. Windows and doors should be designed to minimize the risk of water infiltration, while insulation should be installed to reduce heat transfer.
You can learn more about building envelopes at: brainly.com/question/28163927

#SPJ11

Excitons play a crucial role in silicon solar cells and are involved in several processes that contribute to the generation of electricity. Here are some key roles of excitons in silicon solar cells:

1. Absorption of Photons: When photons from sunlight strike the silicon material of a solar cell, they can be absorbed by silicon atoms, promoting an electron from the valence band to the conduction band. This process creates an exciton—a bound electron-hole pair.

2. Exciton Diffusion: After absorption, excitons can diffuse through the silicon material, moving towards the region of the solar cell where charge separation occurs. This diffusion process allows excitons to reach the vicinity of the p-n junction, where the separation of charges takes place.

3. Exciton Dissociation: At the p-n junction of a silicon solar cell, excitons can undergo dissociation. The electric field created by the junction separates the electron and hole of the exciton, allowing them to move freely in opposite directions as charge carriers.

4. Electron and Hole Transport: Once the exciton is dissociated, the free electron and hole can move independently within the solar cell. They are transported through the silicon material to the respective electrodes, creating an electric current that can be harnessed for external use.

5. Recombination: Excitons can also undergo recombination, where the electron and hole recombine, releasing energy in the form of light or heat. Recombination is undesirable in solar cells as it reduces the overall efficiency of the device.

To enhance the efficiency of silicon solar cells, various strategies are employed to minimize exciton recombination and improve exciton dissociation and charge carrier transport. These include the use of anti-reflection coatings, surface passivation techniques, and optimization of the device structure.

Overall, excitons play a vital role in the absorption and conversion of sunlight into electrical energy in silicon solar cells. Understanding and controlling exciton dynamics are essential for improving the performance of solar cells and advancing the field of photovoltaics.

Learn more about silicon solar cells here:

https://brainly.com/question/32456926

#SPJ11

A crawl space or underfloor space must contain C) a disconnecting means for HVAC equipment.

Major HVAC equipment includes heaters, air handling units, and chillers or air conditioners. The central HVAC system is located away from the central equipment room building and supplies conditioned air through the duct system.

The air conditioner circuit breaker (ACD) is located between the road center and the air conditioner. ACDs provide a visible disconnecting means when performing maintenance and are commonly referred to as circuit breakers, extractors, or air conditioning switches.

Read more about the HVAC equipment :

https://brainly.com/question/20264838

#SPJ1

The ideal gas law can be used to solve this issue: PV = nRT. where R is the gas constant, T is the absolute temperature, n is the number of moles, V is the volume, and P is the absolute pressure.

The average kinetic energy of the particles in a substance is measured by its temperature. It controls heat flow direction and is crucial for comprehending a variety of physical and chemical phenomena. Both the Celsius (°C) and Fahrenheit (°F) scales, which are based on the freezing and boiling points of water and the range of temperatures observed in daily life, respectively, are frequently used to measure temperature. The Kelvin (K) scale, which begins at absolute zero, is employed in scientific applications. Substances' physical characteristics, including density, thermal conductivity, and expansion coefficient, are all influenced by temperature, which is also a key factor in defining how they behave and behave under varied conditions.

Learn more about temperature here:

https://brainly.com/question/23383593

#SPJ4

The Law of Conservation of Charge is a fundamental principle in electromagnetism that states that the net electric charge of an isolated system undergoing any process remains constant.

This means that the total electric charge present in a system before a process begins is equal to the total electric charge present in the system after the process has ended. This law applies to all physical processes, regardless of whether they are electrical, chemical, or mechanical in nature.The conservation of charge is a fundamental concept in electrical engineering and is used to analyze and design a wide range of electrical and electronic systems. It helps engineers understand the behavior of charged particles and their interactions with other charged particles, allowing them to make predictions about the behavior of electrical systems and design circuits that meet specific requirements. The law of conservation of charge is a cornerstone of the field of electromagnetism and is essential for understanding a wide range of physical phenomena.

Find out more about Law of Conservation of Charge

brainly.com/question/29178866

#SPJ4

An alpha-numeric designator which is systematically assigned at the time of manufacture, so as to identify the manufacturer, month, year, location, and batch is referred to as lot number.

A product can be defined as any physical object (tangible item) that is typically produced by a manufacturer so as to satisfy and meet the demands, needs or wants of every customer. Also, some examples of a product include the following:

A lot number can be defined as an alpha-numeric designator which is systematically designed and assigned at the time of manufacture, so as to identify the manufacturer, month, year, location, and batch.

Read more on products here: brainly.com/question/14308690

#SPJ1

Commercial building projects are 70 to 95  percent subcontracted.

This is because much of the labor that goes into constructing a commercial building is outsourced, including a variety of trades such as electrical, plumbing, HVAC, carpentry, and other services. Additionally, subcontracting the project helps reduce costs, as the contractor can negotiate pricing with a variety of subcontractors. This allows them to reduce labor costs and potentially increase profits.

Additionally, subcontracting a commercial building project allows for specialized expertise that the general contractor may not possess, making it an ideal option for complex and specialized projects. Finally, subcontracting allows for a higher level of control over the quality, as the general contractor can ensure that all subcontractors meet their standards and requirements. Therefore, Commercial building projects are 70 to 95 percent subcontracted.

Know more about Commercial buildings here :

https://brainly.com/question/14329042

#SPJ11

The answer is option B. Fav 347 kN, i.e., The average horizontal collision force causing the deformation is 347 kN.

During the collision, the car experiences a change in momentum, which is equal to the impulse of the collision. The impulse can be calculated by using the equation:

Impulse = Force x Time

Since the car is free to roll during the collision, the time of the collision is equal to the time it takes for the front end of the car to deform by 0.2 m. This can be calculated using the equation:

Time = Square root (2 x deformation / acceleration)

where acceleration is equal to the acceleration due to gravity since the car is not subjected to any external forces during the collision.

Substituting the given values, we get:

Time = Square root (2 x 0.2 / 9.81) = 0.202 s

The impulse can be calculated by dividing the change in momentum by the time of the collision, which is equal to the mass of the car multiplied by its initial velocity. Thus:

Impulse = (2000 kg x 30 km/h) / 0.202 s = 882352.94 Ns

Therefore, the average horizontal collision force causing the deformation is:

Force = Impulse / Time = 882352.94 Ns / 0.2 s = 4411764.71 N = 347 kN (approximately) i.e., Option B.

In conclusion, the average horizontal collision force causing the deformation is 347 kN.

To learn more about, collision force, visit:

https://brainly.com/question/14313244

#SPJ11

Answer: hello your question is incomplete attached below is the missing detail  

answer :

Complex power = 2.5 ∠ 50°  VA

apparent power = 2.5 VA

average power = 1.6 Watts

reactive power = 1.915 Var

power factor = 0.64 ( leading )

Explanation:

i) complex power

P = Vrms *  Irms

  = 17.67∠40°  * 0.1414∠-10°

  = 2.5∠50° VA

ii) Apparent power

s = Vrms * Irms

  = 17.67 * 0.1414

  = 2.5 VA

iii) Average power absorbed

Absorbed power ( p )  = Vrms * Irms * cos∅

  = 17.67 * 0.1414  * cos ( 50 )

  = 1.6 watt

iv) Reactive power

P =  Vrms * Irms * sin∅

  = 17.67 * 0.1414  * sin ( 50 )

  = 1.915 VAR

v) power factor

P.F = cos ∅ = p /s

                   = 1.6 watt / 2.5 VA  = 0.64.

The correct answer is 900cm. dimensions: height 15cm, width 30cm and depth 20cm.

The box's longest side with a flap is always its length. The width is the following metric. Although it is always the side that is shorter than the length, the breadth side also contains a flap. The package's height should be measured. Height x Depth x Width is the equation for a solid rectangle's volume. To get the height of a rectangular item, divide the volume by the product of the length and width.

V = l x w x h

V = 10cm x 4cm x 5cm

V = 200cm3

"Height" may be replaced with "depth." For example, "The box has a height of 15cm, width of 30cm, and is 20cm deep

To learn more about volume click the link below:

brainly.com/question/23952628

#SPJ4

Answer: I have 2 suggestions: one, maybe, maybe, use some of that metal tape that you get at hardware places, and: two, buy a new pipe (or pipes), two be sure that it won't happen again. Have a good day, and thanks for asking the brain!

Explanation:

Answer:

  2.728 kg

Explanation:

The units help you keep the calculation straight.

  \(\dfrac{550\text{ kJ}}{(80^\circ\text{C}-32^\circ\text{C})(4.200\text{ kJ/kg\,$^\circ$C})}=\dfrac{550}{48\cdot4.2}\text{ kg}\approx\boxed{2.728\text{ kg}}\)

To reverse the direction of rotation in a three-phase induction motor with a phase sequence of A-B-C, the phase sequence of the supply should be changed to C-B-A.

In a three-phase induction motor, the direction of rotation is determined by the phase sequence of the power supply.

The phase sequence refers to the order in which the three phases (A, B, and C) are supplied.

By default, if the phase sequence of the supply is A-B-C, the motor will rotate in a specific direction.

However, to reverse the direction of rotation, the phase sequence of the supply needs to be changed.

When the phase sequence is changed to C-B-A, the motor will experience a reversal in the rotating magnetic field produced by the stator windings.

This change in the magnetic field's rotation direction causes the rotor to rotate in the opposite direction, effectively reversing the motor's overall rotation.

By altering the phase sequence from A-B-C to C-B-A, the phase angles between the three phases are rearranged, leading to the reversal of the rotating magnetic field and subsequently changing the direction of rotation in the three-phase induction motor.

Learn more about phase sequence

brainly.com/question/31313582

#SPJ11

You get a result immediately from Euler's formula:

e ^(i π/2) = cos(π/2) + i sin(π/2) = 0 + i * 1 = i

In the case above,  poor connection at the pressure cycling switch  and also a faulty A/C clutch coil could be the cause.

The cause that hinders the A/C Compressor from engaging are:

Note that the pressure switches is known to be one that control the on/off function of any kind of AC compressor and as such, if there is switch failure, it can hinder the AC compressor from functioning at all.

Therefore, technician A and B are correct.

Learn more about refrigerant pressure from

https://brainly.com/question/10054719

#SPJ1

The model that resembles a systems approach with inputs at the base, processes in the center, and outputs at the top is known as the team Leadership Model.

To learn more about  systems approach  refer

https://brainly.com/question/13149592

#SPJ4

Answer:

1.) 103.23 degree centigrade

2.) 126.96 degree centigrade

Explanation:

Given that a transparent film is to be bonded onto the top surface of a solid plate inside a heated chamber. For the bond to cure properly, a temperature of 70°C is to be maintained at the bond, between the film and the solid plate. The transparent film has a thickness of 1 mm and thermal conductivity of 0.05 W/m·K, while the solid plate is 13 mm thick and has a thermal conductivity of 1.2 W/m·K. Inside the heated chamber, the convection heat transfer coefficient is 70 W/m2·K. If the bottom surface of the solid plate is maintained at 52°C.

To determine the temperature inside the heated Chamber, let us first calculate the heat transfer rate per unit area through the plate by using the formula

Heat transfer rate R = k( Tb - T2)/L

Where

k = 1.2 W/mA.K

Tb = 70 degree

T2 = 52 degree

L = 13mm = 13/1000 = 0.013m

substitute all the parameters into the formula above.

R = 1.2 x ( 70 - 52 )/ 0.013

R = 1.2 x (18/0.013)

R = 1661. 5 W/m^2

the surface temperature of the transparent film will be

Ts = Tb + (RLf/Kf)

Ts = 70 + (1661.5 x 0.001)/0.05

Ts = 70 + (1.6615)/0.05

Ts = 70 + 33.23

Ts = 103.23 degree centigrade

the temperature inside the heated Chamber will be calculated by using the formula

Ti = Ts + (R/h)

Ti = 103.23 + (1661.5/70)

Ti = 103.23 + 23.74

Ti = 126.97 degree centigrade

Shears with teeth cut more hair than ones without teeth, more, less thinning

What is Shear?
Shear is a type of motion or force that causes two parallel surfaces of a material to slide past each other in opposite directions. This motion can be applied to a variety of materials, including metals, plastics, and concrete. When shear is applied to a material, it causes the material to deform in a way that is parallel to the shear direction. This type of motion or force is commonly used in manufacturing, engineering, and construction to shape, cut, or join materials together. Shear can also be used in other applications, such as when studying the behavior of soils or other materials in geotechnical engineering.

To know more about Shear
https://brainly.com/question/20630976
#SPJ4