Draw a 3-phase Star-Delta motor starter circuit. Label all components used and provide a brief explanation for the operation of the circuit. [5]

Answer:

a. T-V and P-V diagram are included

b. State 1: Specific volume = 0.0811753 m³/kg

State 2: Specific volume = 0.0811753 m³/kg

State 3: Specific volume = 0.0804155 m³/kg

c. Z = 51.1

d. Quality for state 1 = 100%

Quality for state 2 = 63.47%

Quality for state 3 = 100%

Explanation:

a. T-V and P-V diagram are included

b. State 1: Water vapor

P₁ = 3.0 MPa = 30 bar

T₁ = 300°C = 573.15

Saturation temperature = 233.86°C Hence the steam is super heated

Specific volume = 0.0811753 m³/kg

State 2:

Constant volume formula is P₁/T₁ = P₂/T₂

Specific volume = 0.0811753 m³/kg

T₂ = 200°C = 473.15

Therefore, P₂ = P₁/T₁ × T₂ = 3×473.15/573.15 = 2.4766 MPa

At T₂ water is mixed water and steam and the \(v_f\) = 0.00115651 m³/kg

\(v_g\) = 0.127222 m³/kg

State 3:

P₃ = 2.5 MPa

T₃ = 200°C

Isothermal compression P₂V₂ = P₃V₃

V₃ = P₂V₂ ÷ P₃ = 2.4766 × 0.0811753/2.5 = 0.0804155 m³/kg

Specific volume = 0.0804155 m³/kg

2) Compressibility factor is given by the relation;

\(Z = \dfrac{PV}{RT} = \dfrac{3\times 10^6 \times 0.0811753 }{8.3145 \times 573.15} = 51.1\)

Z = 51.1

3) Gas quality, x, is given by the relation

\(x = \dfrac{Mass_{saturated \, vapor}}{Total \, mass} = \dfrac{v - v_f}{v_g - v_f}\)

Quality at state 1 = Saturated quality = 100%

State 2 Vapor + liquid Quality

Gas quality = (0.0811753 - 0.00115651)/ (0.127222-0.00115651) = 63.47%

State 3: Saturated vapor, quality = 100%.

Answer:

a) In turbulent flow, the tubes with rough surfaces have much higher friction factors than the tubes with smooth surfaces.

Explanation:

Turbulent flow is a type of fluid flow in which fluid will undergo irregular fluctuations. The tubes with rough surfaces have higher friction factors than the tubes with smooth surfaces. In laminar flow the effect of effect of surface roughness is negligible on friction factors.

The number of times the current oscillates in one second is the reciprocal of the period, which is f = 60 oscillations per second.

The given equation is V = Vmax sin(ωt),

where Vmax = Vrms √2 and ω = 2πf.

In this problem, the voltage V in a typical -volt outlet can be expressed by the function V = Vmax sin(ωt), where ω is the angular speed (in radians per second) of the rotating generator at the electrical plant and t is the time measured in seconds.

Therefore, ω = 2πf = 2π(60 Hz) = 120π rad/s.

It is given that "It is essential for electric generators to rotate at precisely cycles per second."

Thus, the frequency is f = 60 Hz, which means that the current oscillates 60 times in one second.

Another way of solving this problem is to use the period of the voltage wave, which is given by T = 1/f.

Therefore, T = 1/60 = (1/60) s. The number of times the current oscillates in one second is the reciprocal of the period, which is f = 60 oscillations per second.

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The given statement "Concepts are general ideas that you use to organize your experience and, in doing so, bring order and intelligibility to your life. " is true because It is important to understand what concept is and how they are useful in our daily life as it helps us organize our experiences and ideas.

Concepts are general ideas that can be used to classify and organize information. They provide structure and coherence to our perceptions and experiences. When we have a concept, it helps us bring order to our experiences and gives us a framework for understanding new information.

By organizing information into categories, we can more easily remember, process, and communicate it. This can help us make sense of the world around us and navigate our experiences in a meaningful way. In conclusion, concepts are important because they help us make sense of our experiences and the world around us. They provide structure and intelligibility to our lives, allowing us to organize and communicate our ideas and experiences more effectively.

So the statement is true.

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The correct function declaration for a function that takes a 2D array of ints and returns an int is:

int f (int a[][3], int rowSize);

1. The return type is "int", which means the function will return an integer value.
2. The function name is "f".
3. The function takes two parameters: a 2D array of ints (int a[][3]) and an integer value (int rowSize).
4. In the 2D array declaration (int a[][3]), the column size is fixed at 3, while the row size is left unspecified. This allows the function to work with arrays of varying row sizes. The int rowSize parameter provides the actual row size.

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A) Select the Search icon and enter the term into the search field. A definition will show up in the Key Terms section of the search results.

Key Terms are words or phrases used to describe a concept or idea. They are often used in the field of academia to help define the scope of a particular study or research project. Key Terms are also used in business and legal documents to provide a concise and precise description of a concept or idea. By providing clear definitions for each key term, it helps to ensure that all parties involved in a discussion or agreement are on the same page.

C) Select the Table of Contents or the Navigation icon and navigate to the Glossary.
D) Select the key term in your eText and a pop-up definition will appear.

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The statement that is not true of ISO 9000 is b. The American National Standards Institute guarantees continued ISO 9000 certification for all the ISO-certified American companies. Here's why:  ISO 9000 is a set of international standards for quality management and quality assurance.

It is designed to help companies achieve consistency in their products and services while also improving customer satisfaction. ISO 9000 is a five-part series of standards that includes ISO 9001, ISO 9002, ISO 9003, ISO 9004, and ISO 19011.

The ISO 9000 certification process involves an accredited third-party certification body reviewing a company's quality management system to ensure that it meets the requirements of the ISO 9001 standard. Once a company has been certified, the certification body will issue an ISO 9000 certificate that the company can use in its advertising and publications.

Continued ISO 9000 certification is not guaranteed. To maintain certification, a company must undergo regular surveillance audits to ensure that its quality management system continues to meet the requirements of the ISO 9001 standard. If a company fails to meet these requirements, it can lose its certification.

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Vector addition parallelogram law :If a force F needs to be broken down into its component parts along the axes b and c, one should start at the head of the force and build lines parallel to the axes until a parallelogram is formed.

Vector addition parallelogram law :If a force F needs to be broken down into its component parts along the axes b and c, one should start at the head of the force and build lines parallel to the axes until a parallelogram is formed.

The parallelogram's sides are represented by Fb and Fc.

Finding the force component F AB and F AC applied at diagram point A is our task.

We can employ the law of sines, as shown in the diagram.

The query is unfinished.

The entire question is included as an image in the attachment, and an explanation is given below.

F AB / sin 60  = 500/ sin 75

F AB = 500/0.965*0.866

F AB =  448.7 N

To find F AC

F AC /sin 45 =500 /sin 75

F AC = 500/0.965* 0.7071

F AC = 366.3 N

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Answer:

the clothing you wear, what's in the air (gases), surrounding and weather

Answer:

Q = [ mCp ( ΔT) ] \(_{cooling water }\)

(ΔT)\(_{cooling water}\) and  Q  is given

\(m_{cooling water}\)  = \(\frac{Q}{Cp[ T_{out} - T_{in} ] }\)

next the rate of condensation of the steam

Q = [ m\(h_{fg}\) ]\(_{steam}\)

  \(m_{steam} = \frac{Q}{h_{fg} }\)

Total resistance of the condenser is

R = \(\frac{Q}{change in T_{cooling water } }\)

Explanation:

How will the rate of condensation of the steam and the mass flow rate of the cooling water can be determined

Q = [ mCp ( ΔT) ] \(_{cooling water }\)

(ΔT)\(_{cooling water}\) and  Q  is given

\(m_{cooling water}\)  = \(\frac{Q}{Cp[ T_{out} - T_{in} ] }\)

next the rate of condensation of the steam

Q = [ m\(h_{fg}\) ]\(_{steam}\)

  \(m_{steam} = \frac{Q}{h_{fg} }\)

Total resistance of the condenser is

R = \(\frac{Q}{change in T_{cooling water } }\)

Control points are areas of the vehicle structure that are used to monitor the precision of the vehicle body's dimensions as they are being assembled. Thus, option B is correct.

In a full frame car, the body is independent of the frame and fastened by bushings and bolts. The unibody is a structure made up of integrated panels that are welded, bonded, and riveted together.

Therefore, In a full frame car, the body is independent of the frame and fastened by bushings and bolts. The unibody is a structure made up of integrated panels that are welded, bonded, and riveted together.

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Answer:

Explanation:

Profile photo for Rosie Milojevic

Rosie Milojevic, Business Development at iComplied

Answered 3 years ago

For those who run or work in a business that handles food, you understand the importance of food safety and regulation compliance as it pertains to not only to certification and licensing of a company, but also the life or death of those who consume the products. Because food safety is such an important issue, we want to ensure that all companies who work in the production, preparation, or processing of food have the tools and information they need to ensure they are in full compliance 100% of the time. One slip in food safety compliance could cost someone their health or life, and this information spreads mistrust in the general public toward the company who sold the product, and also the entire product across companies throughout an entire country and beyond. So how does each company working with food ensure they comply with each and every food safety regulation? Through excellent auditing tools.

Auditing in Food Safety Must Change

Auditing in food safety compliance is essential in ensuring that all regulations are being complied with. Most auditing practices for major companies are severely out of date. Many rely on several different forms, stacks of paperwork, and data stored on multiple different computers and databases. This is incredibly inefficient, as it can be easy to miss something when comparing one sheet to the next, and paper can easily be lost or destroyed. It is also time consuming for companies to share audits over separate computers and databases, as it must be passed down from one employee to the next. Technology has granted all food safety compliance managers a simple solution. Auditing apps are the new wave solutions for companies who want all of their data stored on one cloud database that is instantly accessible with real-time data for all employees. This means that no one ever gets left out of the loop, and no new information will fall through the cracks.

Answer:The two-second rule is a rule of thumb by which a driver may maintain a safe trailing distance at any speed. The rule is that a driver should ideally stay at least two seconds behind any vehicle that is directly in front of his or her vehicle.

Explanation:

Answer:

idek

Explanation

himomy

In summary, the XYZ Company will require:

(a) 705 processing and assembly operations,

(b) 710 workers (direct labor only), and

(c) 25,738 m2 of total floor space for the new plant.

To calculate the required processing and assembly operations, workers, and total floor space for the new factory, we can break down the problem into smaller parts and analyze each element.

(a) Processing and assembly operations:

Number of components made in the factory: 250 components * 35% = 87.5 (round up to 88 components)

Processing operations for components: 88 components * 8 processing operations = 704 processing operations

Assembly operations for final product: 1 assembly operation (as each product is assembled in one workstation)

Total operations = 704 processing operations + 1 assembly operation = 705 operations

(b) Number of workers (direct labor only):

Processing workers: 704 processing operations / 1 (one worker per work cell) = 704 workers

Assembly workers: 13 models * 1000 units/model = 13,000 units/year

Assembly time per unit: 48 min/unit = 0.8 hr/unit

Assembly time for all products: 13,000 units * 0.8 hr/unit = 10,400 hr

Assembly workers required: 10,400 hr / 2,000 hr/shift = 5.2 (round up to 6 workers)

Total workers = 704 processing workers + 6 assembly workers = 710 workers

(c) Total floor space required:

Processing floor space: 704 work cells * 25 m2/cell = 17,600 m2

Assembly floor space: 6 workstations * 25 m2/station = 150 m2

Total production area: 17,600 m2 + 150 m2 = 17,750 m2

Additional allowance (45%): 17,750 m2 * 45% = 7,987.5 m2

Total floor space = 17,750 m2 + 7,987.5 m2 = 25,737.5 m2 (round to 25,738 m2)

In summary, the XYZ Company will require:

(a) 705 processing and assembly operations,

(b) 710 workers (direct labor only), and

(c) 25,738 m2 of total floor space for the new plant.

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Answer:

Massive or linteled

Explanation:

Pyramid is a type of massive or linteled structure.

These structures do no have not much internal spaces and they are huge edifices.

A pyramid is a solid body with outer triangular faces that converges on top. To construct a pyramid, large amounts of materials are usually involved. Pyramids were more prominent in times past before this present civilization.

An interposing relay changes input signals from discrete devices to PLC inputs is True .

An interposing relay functions as a mediator between separate devices and the inputs of a Programmable Logic Controller (PLC). Its purpose is to transform the discrete device's input signals into a format that the PLC can comprehend and analyze.

The interposing relay receives  signals from devices like buttons, switches, and sensors, and modifies them to become appropriate for the PLC inputs. This may involve altering the voltage levels, signal formats, or implementing isolation etc.

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Answer:

\(-6111.11\ \text{kJ}\)

\(863.28\ \text{kJ}\)

Explanation:

m = Mass of automobile = 1100 kg

v = Velocity of car = 120 km/h = \(\dfrac{120}{3.6}\ \text{m/s}\)

h = Height of hill = 80 m

g = Acceleration due to gravity = \(9.81\ \text{m/s}^2\)

Change in kinetic energy

\(KE=\dfrac{1}{2}m(u^2-v^2)\\\Rightarrow KE=\dfrac{1}{2}\times 1100\times (0-(\dfrac{120}{3.6})^2)\\\Rightarrow KE=-611111.11\ \text{J}\)

Change in kinetic energy is \(-6111.11\ \text{kJ}\)

Change in potential energy is given by

\(PE=mgh\\\Rightarrow PE=1100\times 9.81\times 80\\\Rightarrow PE=863280\ \text{J}\)

The change in potential energy is \(863.28\ \text{kJ}\).

The inductance of the solenoid is 1.01 mH, and the rate at which current must change through it to produce an EMF of 70 mV is 69.31 A/s.

Radius of solenoid (r) = 4.5 cmNumber of turns (N) = 800Length of solenoid (l) = 25 cmEMF (e) = 70 mV

(a) To find the inductance of the solenoid, we use the expression: L = (μ₀×N²×A)/l where,

μ₀ = 4π×10⁻⁷ T.m/A

N = 800 turnsl = 25 cm = 0.25 mA = πr² = 3.14×(4.5 cm)² = 63.585 cm² = 63.585×10⁻⁴ m²

L = (4π×10⁻⁷×800²×63.585×10⁻⁴)/0.25L = 1.01 mH

Thus, the inductance of the solenoid is 1.01 mH.

(b) To find the rate of change of current, we use the formula: e = - L × (di/dt) where,

e = 70 mV,

L = 1.01 mH

We need to find the magnitude of (di/dt)

The above formula can be written as:(di/dt) = - e/L

We substitute the given values to find (di/dt) (di/dt) = -(70×10⁻³ V)/(1.01×10⁻³ H)(di/dt) = - 69.31 A/s

Thus, the rate at which current must change through it to produce an EMF of 70 mV is 69.31 A/s (magnitude only). Therefore, the answer is: 1.01 mH, 69.31 A/s

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The Memory. hd file line by line is discussed below: CHIP Memory { IN in[16], load, address [15]; OUT out [16]; PARTS: DMux4way(in=load, s el-address(13..14], a=load rami, b=loadram2, c=load screen, d=load kb d);This part includes a DMux4way, which is a demultiplexer used to transmit a binary code to one of the four output lines.

The output lines of this demultiplexer are load-rami, load-ram2, load-screen, and load-kbd, which are connected to the input lines of a Ram16k and the screen and keyboard modules. In addition, there is an input line (in) that receives a 16-bit binary number, a load input line that receives a value of one or zero, and a 15-bit address line.RAM16K(in-in, load=loadram, address=address [0..13], out=ramout);This line uses a 16k bit RAM module and accepts a binary input (in) as well as an address, and outputs a binary output (out).

The RAM module reads or writes the value in the given address location based on the load input. The address is a 14-bit binary number, which is used to select a memory location.The four inputs to this multiplexer are: Ramout, Scrout, and Kbout. The output of the Mux is Out. In conclusion, the Memory.hd file line by line, includes a DMux4way, a RAM16k module, a screen module, a keyboard module, and a Mux4way16 module.

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A fluid power system uses the power of a pressurized fluid, the motor then converts the hydraulic pressure into mechanical motion

Such as water, air, oil, or hydraulic fluid, to convert fluid pressure into mechanical motion. The pressurized fluid is moved by a pump, and then the pressure of the fluid is used to drive a motor, actuator, or another device that is designed to do work. The motor then converts the hydraulic pressure into mechanical motion, which can be used to move objects, provide power to equipment, or generate force. The amount of power generated depends on the pressure of the fluid and the type of equipment used to convert the pressure into mechanical motion.

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Answer:

This statement is False.

Explanation:

It doesn't matter how much batteries get stacked.

May I have Brainliest please? My next rank will be the highest one: A GENIUS! Please help me on this journey to become top of the ranks! I only need 6 more brainliest to become a genius! I would really appreciate it, and it would make my day! Thank you so much, and have a wonderful rest of your day!

Answer:

a) When the switch is off and there's no battery supply, the electric potential difference, or electromotive force E(t), is zero. That means the right-hand side of the given differential equation is zero. Therefore, the solution to the homogeneous differential equation represents the charge on the capacitor:

L d²Q/dt² + R dQ/dt + 1/C Q = 0

In this case, since there's no initial charge or current supplied, Q(t) = 0 for all t.

b) When the switch is turned on and a 12-Volt battery is connected:

i. The method of Undetermined Coefficients:

We can solve this by proposing a particular solution that has the same form as the non-homogeneous term, E(t). As E(t) = 12 volts is a constant, we propose Q(t) = A as a constant.

After substituting Q(t) = A into the equation, we would be able to find the value of A, which would give us the particular solution. The general solution would then be the sum of this particular solution and the solution to the homogeneous equation (obtained from part (a)).

ii. The method of Variation of Parameters:

In this method, we would make use of the solutions of the homogeneous differential equation. After finding these, we would propose a solution for the non-homogeneous differential equation in terms of these solutions, and a pair of functions (u and v) to be determined. We then substitute this proposal into the differential equation to obtain a set of two new first-order differential equations for u and v.

c) Once we've found the charge Q(t) in part (b), we can find the current I(t) by differentiating Q(t), as I(t) = dQ/dt.

d) With the given initial conditions (Q = 0.001 C, I = 0 A), we can substitute these into the general solution and its derivative obtained in part (b). We would then solve the resulting system of two equations to find the constants involved, allowing us to determine the specific solution for these initial conditions.

Explanation:

Complex question. Answer depends on data provided and format of equations provided.

**To maintain a constant pressure in the evaporator when the system is running, an expansion valve (axv) increases refrigerant flow when the evaporator pressure drops.**

The expansion valve is a crucial component in a refrigeration system that regulates the flow of refrigerant into the evaporator. Its primary function is to reduce the pressure and temperature of the refrigerant as it enters the evaporator.

When the evaporator pressure drops, it indicates that the cooling load has increased, and more refrigerant is required to maintain the desired cooling effect. In response, the expansion valve adjusts its opening, allowing a greater flow of refrigerant into the evaporator. This increased flow helps to maintain a constant pressure within the evaporator and ensures efficient heat transfer between the refrigerant and the surrounding air or fluid.

By modulating the refrigerant flow in accordance with the evaporator pressure, the expansion valve plays a crucial role in maintaining the proper operation and performance of the refrigeration system.

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The calculated voltage that would be applied to the Control Panel is 20.8 volts.

Since the panel K is 120/208V, 3Ø, 4-W, we know that it has a high leg or wild leg that supplies 208 volts to phase-to-neutral loads and 240 volts to phase-to-phase loads.

To obtain 230 volts, which is required for the control panel, we need to step down the voltage using a transformer.

A 120/240V-12/24V Group I transformer can be used to step down the voltage from 208V to 24V. Since this is a step-down transformer, the voltage across the primary winding will be greater than the voltage across the secondary winding.

The transformer turns ratio is calculated as follows:

Turns ratio = primary voltage / secondary voltage

For the given transformer, the turns ratio is:

Turns ratio = 240V / 24V = 10

Since the input voltage is exactly 208 volts, the voltage across the primary winding of the transformer will also be 208 volts. Therefore, the voltage across the secondary winding can be calculated as follows:

Secondary voltage = Primary voltage / Turns ratio

Secondary voltage = 208V / 10 = 20.8V

Thus, the calculated voltage that would be applied to the Control Panel is 20.8 volts.

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When resource constraints are combined with technical constraints, the original project network and completion date may change, So the given statement is true.

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Answer:

\(y(z) = x(z) - x(z) {z}^{ - 2} - \frac{1}{4} y(z) {z}^{ - 2} \\ y(z) + \frac{1}{4} y(z) {z}^{ - 2} = x(z) - x(z) {z}^{ - 2} \\ y(z) (1 + \frac{1}{4}{z}^{ - 2}) = x(z)(1 - {z}^{ - 2}) \\ h(z) = \frac{y(z)}{x(z)} = \frac{(1 + \frac{1}{4}{z}^{ - 2})}{(1 - {z}^{ - 2})} \)

The rest is straightforward...

The expression for the pressure gradient is given below: (image)

Pressure gradient denotes the alteration in atmospheric pressure over an indicated distance. Essentially, it measures how quickly the pressure changes regarding distance, figuring by dividing the variation of pressure by the range for which such alteration happens.

Regarding meteorology, the force and direction of winds closely associate to pressure gradient's influence. There exists a flow of air from high amounts of pressure towards low ones; thereby, a greater difference of pressure over a given distance results on far stronger winds causing effects.

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