List the four possible ways of connecting a bank of three transformers for three-phase service.

The correct answer to this open question is the following.

The text structure of an article that discusses pharaohs and gives examples and explains how they look is a description.

The text structure called description allows the reader to fully know the characteristics of the people it is referring to, including some important details. That is why the author of a description text adds words like "such as" and "for example."

When describing something, the write is giving structure to the text and sequence. What comes first., what is followed, and so on.

That is why The text structure of an article that discusses pharaohs and gives examples and explains how they look is a description. It includes cause and effect sentences, and some comparisons in order to contrast an idea.

The angular displacement of the output shaft after 2 seconds is 2a3 rad, and its angular velocity is 2a3 rad/s.

To solve this problem, we need to use the kinematic equations of rotational motion. The given constant angular acceleration of pinion gear A is a3 rad/s^2. We also know that the system starts from rest, which means the initial angular velocity is zero.

Using the equation:

θ = ω0t + 1/2 a3t^2

where θ is the angular displacement, ω0 is the initial angular velocity, t is the time, and a3 is the constant angular acceleration of pinion gear A.

We can find the angular displacement of pinion gear A after 2 seconds:

θ = 0 + 1/2 (a3)(2)^2
θ = 2a3 rad

Since pinion gear A and gear B have meshed together, they have the same angular displacement. Therefore, the angular displacement of gear B and the output shaft is also 2a3 rad.

Using the equation:

ω = ω0 + a3t

where ω is the final angular velocity.

We can find the final angular velocity of pinion gear A after 2 seconds:

ω = 0 + (a3)(2)
ω = 2a3 rad/s

Since gear A and gear B have the same pitch diameter, they also have the same angular velocity. Therefore, the angular velocity of gear B and the output shaft is also 2a3 rad/s.

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Answer:

10 cents/kwh

Explanation:

Base monthly charge = $10.00

First 100 kwh at $0.16/kwh = $16.00

Next 200 kwh at $0.10/kwh = $20.00

Remaining 400 kwh at $0.06/kwh = $24.00

Total charge = $10 + $16 + $20 + $24 /(100+200+400)

Average cost = $70/700 or 10 cents/kwh

Answer:

Profile is a graphical representation of velocity distribution

By offering a centralized repository for collecting and managing data, databases can considerably improve an organization's data collection process.

It will be very difficult for organizations to function without the use of data base.

Databases are used to store, organize, and access data of any type. They collect information about people, places, or things. That information is gathered in one place so that it may be studied and analyzed. Databases are simply organized collections of data.

Databases allow us to work efficiently with massive amounts of data. They make data updating straightforward and reliable, and they help with accuracy.

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The entropy change of the R134a during this process is 0.035 KJ

Entropy change refers to the measure of the degree of disorder or randomness in a thermodynamic system. It is a concept in thermodynamics that describes the amount of energy that is unavailable for doing work in a given process.

The entropy change of a system can be calculated by subtracting the initial entropy of the system from its final entropy.

T = PV/(mR)

T1 = 180 / 10 * 0.08314

T2 = P2V/(mR)

Now T1 = T2

such that

0.08314 ln (100kpa / 180)

= 0.035 KJ

The entropy change of the R134a during this process is 0.035 KJ

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The heat treating process being performed when a low carbon steel is heated to a temperature below the lower transformation temperature before cooling in an effort to soften it slightly is known as annealing.

Annealing is a heat treatment process that involves heating a metal to a specific temperature and holding it there for a certain amount of time before allowing it to cool down slowly. The purpose of annealing is to make a metal softer, more ductile, and more machinable. It also improves its toughness and makes it easier to form.Annealing can be done in several different ways, including full annealing, stress relief annealing, and spheroidizing annealing.

Full annealing involves heating the metal to a temperature above its upper critical temperature, holding it there for a period of time, and then allowing it to cool down slowly. Stress relief annealing involves heating the metal to a lower temperature and holding it there for a shorter period of time, while spheroidizing annealing is used to improve the machinability of high-carbon steels.

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This question is incomplete, the complete question is;

For a steel alloy it has been determined that a carburizing heat treatment of 11.3 h duration at Temperature T1 will raise the carbon concentration to 0.44 wt% at a point 1.8 mm from the surface. A separate experiment is performed at T2 that doubles the diffusion coefficient for carbon in steel.

Estimate the time necessary to achieve the same concentration at a 4.9 mm position for an identical steel and at the same carburizing temperature T2.

Answer:

the required time to achieve the same concentration at a 4.9 is 83.733 hrs

Explanation:

Given the data in the question;

treatment time t₁ = 11.3 hours

Carbon concentration = 0.444 wt%

thickness at surface x₁ = 1.8 mm = 0.0018 m

thickness at identical steel x₂ = 4.9 mm = 0.0049 m

Now, Using Fick's second law inform of diffusion

\(x^2\) / Dt = constant

where D is constant

then

\(x^2\) / t = constant

\(x^2_1\) / t₁ = \(x^2_2\) / t₂

\(x^2_1\) t₂ = t₁\(x^2_2\)

t₂ = t₁\(x^2_2\) / \(x^2_1\)

t₂ = (\(x^2_2\) / \(x^2_1\))t₁

t₂ = \((\) \(x_2\) / \(x_1\) \()^2\) × t₁

so we substitute

t₂ = \((\) 0.0049  / 0.0018  \()^2\) × 11.3 hrs

t₂ = 7.41 × 11.3 hrs

t₂ = 83.733 hrs

Therefore, the required time to achieve the same concentration at a 4.9 is 83.733 hrs

Answer:

The first Machine Process is Turning.

Explanation:plz mark brainliest if i am right

Answer:

I believe its turning.

A) Oxidation occurs at the zinc electrode. B) The zinc electrode is the anode of the cell. C) The zinc electrode corrodes, as it is losing electrons to form ions, which dissolve into the solution.

An electrode is a conductor that is used to establish electrical contact with a non-metallic part of a circuit, such as an electrolyte, a gas, or a vacuum. An electrode is a solid metal or semiconductor material that is used to conduct electrons to or from a chemical reaction system.

D) The emf of the galvanic cell can be calculated using the equation: emf = E(cathode) - E(anode)

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The platform in a two-point scaffold should be no more than 14 inches wide.

This is in accordance with OSHA regulations, which require the platform width to be at least 14 inches but no more than 20 inches. The reason for this is to ensure that workers have enough space to work comfortably while also reducing the risk of tripping or falling. Additionally, the platform should be level and secured properly to prevent any movement or instability. It's important to note that the weight capacity of the platform should also be taken into consideration to avoid overloading it. In summary, the platform width of a two-point scaffold should be within the range of 14-20 inches and must be properly secured and leveled for safe use.

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Answer:

Architect

Explanation: You need to be unique and creative to be an architect.

Nec Article 430 covers selection of time-delay fuses for motor- overload protection.

Article 430 that is found in  National Electrical Code (NEC) is known to be state as “Motors, Motor Circuits and Controllers.” .

Note that the article tells that it covers areas such as motors, motor branch-circuit as well as feeder conductors, motor branch-circuit and others.

Therefore, Nec Article 430 covers selection of time-delay fuses for motor- overload protection.

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Answer:

The answer is V = √2FD ÷ CD × PA

Explanation:

FD = CD × PV²A ÷ 2

V² = 2FD ÷ CD × PA

V = √2FD ÷ CD × PA

Thus, The value of V is V = √2FD ÷ CD × PA

-TheUnknownScientist 72

The information system for online registration is using data validation to ensure that business rules are followed.

Data validation is the process of verifying that data entered into a system is accurate, complete, and meets the required format and business rules. In this case, the system is checking whether the user has met all the necessary prerequisites for a particular course before allowing them to register. This helps to ensure that students are only registered for courses that they are qualified to take, which can help to prevent problems such as dropped courses or failing grades. Overall, data validation is an important tool for ensuring that business rules are followed in information systems, and it plays a critical role in ensuring data quality and accuracy.

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Answer:

To determine the rate of heat transfer, we need to use the first law of thermodynamics, which states that the rate of change of energy in a system is equal to the rate of heat transfer into the system minus the rate of work done by the system. At steady state, the rate of change of energy is zero, so we have:

Rate of heat transfer = Rate of work done by the paddle wheel

The rate of work done by the paddle wheel can be calculated using the formula:

Rate of work = torque x angular velocity

where torque is given as 0.2 kNm and angular velocity is given as 300 rpm. We need to convert angular velocity to radians per second:

Angular velocity = 300 rpm x (2π/60) = 31.4 rad/s

Rate of work = 0.2 kNm x 31.4 rad/s = 6.28 kW

Therefore, the rate of heat transfer is 6.28 kW.

To determine the rate of entropy transfer, we need to use the formula:

Rate of entropy transfer = Rate of heat transfer / Temperature

The temperature is given as 25°C, which is equivalent to 298 K.

Rate of entropy transfer = 6.28 kW / 298 K = 0.0211 kW/K

Therefore, the rate of entropy transfer is 0.0211 kW/K.

To determine the rate of entropy generation, we need to use the formula:

Rate of entropy generation = Rate of heat transfer / Temperature - Rate of entropy transfer

Rate of entropy generation = 6.28 kW / 298 K - 0.0211 kW/K = 20.97 kW/K

Therefore, the rate of entropy generation is 20.97 kW/K.

Explanation:

Hope this helps!

sens organ is the eye example

Answer:

Moore's Law

Explanation:

An observation that the number of transistors in a dense integrated circuit doubles about every two years (24 months), was made by Gordon E. Moore, the co-founder of Intel, and this observation became Moore's Law in 1965.

Therefore, Moore's Law is based on the observation that the rate of increase in transistor density on microchips had increased steadily, roughly doubling every 18 to 24 months.

The exit pressure will be 1.3273 bar = 0.1327 MPa and the exit specific internal energy 228.61 KJ/Kg .

1.) In graph,

1-2 = Compressor

3-4 = Throttle value

\(T_{1} \\\) = \(T_{4}\) = -20°C = 253 K

\(T_{3}\) = 25°C = 298 K

\(P_{3}\) = 0.8 MPa

Assuming saturated fluid is entering the value at point (3),

using table of R-134a properties

∵ \(h_{3} =h_{4}\) = 234.49 KJ/Kg (at 25°C,8 bar)

at \(T_{3}\) = 25° , \(P_{3}\) = 0.8 MPa =8 bar

At -20°C,   \(hf_{4}\) = 173.6 KJ/Kg

                 \(hg_{4}\) = 386.6 KJ/Kg

\(h_{4} = hf_{3} + n_{4} ( hg_{4} - hf_{4} )\) = 234.49

173.6 + \(n_{4}\) [386.6 - 173.6] = 234.49

             \(n_{4}\) = 0.285

\(P_{4} = P_{1} = P_{sat}\) = 1.3273 bar = 0.1327 MPa

2.)

Exit specific internal energy, using table R-134a

\(U_{4} = uf_{4} + n_{4} (ug_{4} - uf_{4} )\)

at -20°c, \(uf_{4}\\\) = 173.65, ufg = 192.85 KJ/ Kg

\(U_{4}\) = 173.65 + 0.285 (192.85)

\(U_{4}\) = 228.61 KJ/Kg

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Part A : Since the discriminant is negative, the roots are complex

The roots of the characteristic equation are -2.5 + 1.9365i and -2.5 - 1.9365i.

Part B : Since the new discriminant is also negative, the roots are complex

The roots of the characteristic equation are -2.5 + 99.9687i and -2.5 - 99.9687i.

Part C : For the response to be critically damped, the capacitance should be adjusted to 0.0001F.

To find the characteristic equation of the circuit, we can start by writing the differential equation governing the circuit's behavior. The equation for an RLC circuit is given by:

LC d²q/dt² + RC dq/dt + q = 0, where q is the charge on the capacitor.

Part A:

Given C = 100mF, L = 1H, and R = 5Ω, we can substitute these values into the differential equation:

(1H)(100mF) d²q/dt² + (5Ω)(100mF) dq/dt + q = 0

Simplifying, we get:

0.1 d²q/dt² + 0.5 dq/dt + q = 0

Now we can find the characteristic equation by assuming a solution of the form q = e^(st):

0.1s² + 0.5s + 1 = 0

Multiply the equation by 10 to get rid of the decimal:

s² + 5s + 10 = 0

Using the quadratic formula, we can find the roots of this equation:

s = (-b ± √(b² - 4ac)) / (2a)

Plugging in a = 1, b = 5, and c = 10:

s = (-5 ± √(5² - 4(1)(10))) / (2(1))

s = (-5 ± √(-15)) / 2

Since the discriminant is negative, the roots are complex:

s = (-5 ± √15i) / 2

Therefore, the roots of the characteristic equation are -2.5 + 1.9365i and -2.5 - 1.9365i.

Part B:

To find the new characteristic equation with a resonant frequency of 100 rad/s, we need to adjust the capacitance. The resonant frequency is given by:

ω = 1 / √(LC)

Substituting the given values, we have:

100 = 1 / √(1(100mF))

Squaring both sides and rearranging, we find:

10 = 1 / C

C = 1/10 = 0.1F

Now, we can find the new characteristic equation with this adjusted capacitance value. Substituting the values R = 5Ω, L = 1H, and C = 0.0001F into the characteristic equation, we have:

s^2 + (5/1)s + 1/((0.0001)(1)) = 0

s^2 + 5s + 10000 = 0

To find the root(s), we solve this quadratic equation:

s = (-5 ± √(5^2 - 4(1)(10000))) / 2(1)

Simplifying further:

s = (-5 ± √(25 - 40000)) / 2

s = (-5 ± √(-39975)) / 2

Again, the discriminant is negative, so the roots of the new characteristic equation are complex numbers:

s = (-5 ± √39975i) / 2

Part C:

For the response to be critically damped, the roots of the characteristic equation should be real and equal. Since we have already found the roots in Part B as complex conjugates, we need to find the capacitance value for which the roots become real and equal.

The characteristic equation is:

s = -2.5 ± 1.9365i

For the roots to be real and equal, the imaginary part must be zero. Therefore, we set 1.9365i equal to zero:

1.9365i = 0

This implies that s = -2.5. We can substitute this value into the resonant frequency equation:

ω = 1 / √(LC)

100 = 1 / √(1H * C)

Squaring both sides and rearranging, we have:

C = 1 / (100² * 1H)

C = 1 / 10,000 = 0.0001F

Therefore, for the response to be critically damped, the capacitance should be adjusted to 0.0001F.

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A project team may choose to prepare a low-fidelity version of a website design using sticky notes for several reasons:

Sticky notes allow for quick and easy changes. Since they are easy to move around and modify, the team can iterate on the design quickly, making adjustments and improvements without investing significant time or resources. This promotes an iterative design process, enabling the team to refine and enhance the design rapidly.Collaboration and Communication: Sticky notes facilitate collaboration and communication among team members. They can be easily placed on a whiteboard or a wall, allowing everyone to visualize and discuss the design together. Team members can share their ideas, suggestions, and feedback by directly manipulating the sticky notes, fostering effective communication and collaboration within the team.Low Cost and Accessibility: Sticky notes are affordable and readily available, making them a cost-effective option for creating prototypes. Compared to digital design tools or high-fidelity prototypes, sticky notes are inexpensive and accessible to all team members, regardless of their technical expertise. This inclusivity encourages participation from different stakeholders and promotes a diverse range of perspectives during the design process.Focus on Conceptual Design: Low-fidelity designs with sticky notes primarily focus on the conceptual aspects of the website, such as layout, content organization, and user flow. By avoiding intricate details or visual aesthetics, the team can concentrate on the fundamental structure and functionality of the design. This allows for early validation and testing of design concepts before investing significant time and resources in higher-fidelity prototypes.Emphasis on User Experience: Sticky notes enable the team to simulate user interactions and test the usability of the design. By physically moving and rearranging the sticky notes, the team can simulate user flows and assess the user experience. This hands-on approach allows for early identification of potential usability issues, leading to design improvements and a better user experience.

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Answer:

Every measuring quantity has a unit.

Explanation:

Ampere or A is the  measuring unit of current intensity.

Farad or F is the measuring unit of electrical capacitance.

Ohm or Ω is the  measuring unit of electrical resistance.

Henry  or H is the  measuring unit of inductance

Volts or V is the  measuring unit of voltage

Watts or W is the  measuring unit of power.

There are a lot of ways employees uses in controlling exposure routes.  But when risk assessment is not be performed is not a part of the control methods.

The ways to control workplace hazards are known to be means taken to ensure safety in the workplace.

The examples are:

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Like a normal variable, pointers must be declared before they can be used. Declaring a pointer is done by putting a * before the name. A type is also linked to a pointer.

A variable whose value is the memory address of an int is referred to as a pointer to an int, whereas a variable whose value is the memory address of a pointer to an int is referred to as a pointer to an int and the value of that pointer to an int is referred to as a memory address of an int. Let's say you define the following three variables.

C Double Pointer (Pointer to Pointer) #include void main () stdio.h> int *p; int **pp; p = &a; // The address of a is indicated by pointer p. pp = &p; // Pointer pp is a double pointer that points to pointer p's address.

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True. To find the angle in degrees between two vectors, we can use the dot product formula and trigonometry.

To find the angle between two vectors, we use the dot product formula, which relates the dot product of two vectors to the cosine of the angle between them. The dot product is calculated by multiplying the corresponding components of the vectors and summing the results. Dividing the dot product by the product of the magnitudes of the vectors gives us the cosine of the angle.

Taking the inverse cosine of this value provides the angle in radians. To obtain the angle in degrees, we convert the result from radians to degrees by multiplying by 180/π. This calculation gives us the angle between the two vectors in degrees.

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Answer:

Resistance = 360,000 Ω = 360 kΩ

Tolerance = +/- 5%

Explanation:

You can follow a four-band resistor chart to determine resistance and tolerance based off each column.

1st Band = Orange = 3

2nd Band = Blue = 6

3rd Band = Yellow = 10,000 Ω (this is the multiplier)

Resistance = 36 * 10,000 Ω = 360,000 Ω = 360 kΩ

4th Band = Gold = +/- 5% Tolerance

Answer: The key to prevent accidents in a welding shop are: Necessary protection must be taken while welding process otherwise it will harm the welder. Safety precautions must be taken. The safety precautions are mentioned on the manual of every equipment.

Answer:

1. for aluminium

-8438.82k/m

8.4x10³k/m

2. For glass:

-6.43x10⁶

3. For aerosol

-1.6x10⁹

Explanation:

We have in conclusion that aerosol has a high temperature gradient. So it is not likely to have the strength to withstand a high thermal stress

Materials that have Lower thermal conductivity are likely to have their temperature gradient to be on a high side, and most of the time, these materials are brittle.

So we get why this boss is concerned about aerogel.

Please refer to the attachment for the calculations. Thank you!