Problems in EE0021 1. A 3-phase y connected balance load impedance of 3+j2 and a supply of 460 volts, 60 Hz mains. Calculate the following: a. Current in each phase b. Total power delivered to the load C. Overall power factor of the system 2. A 3-phase Wye-Delta Connected source to load system has the following particulars: Load impedance 5+4 ohms per phase in delta connected, 460 volts line to line, 60 hz mains: Calculate the following: a. Voltage per phase b. Voltage line-line C. Line per phase and current line to line

Answer: A. High

Explanation:

In order to have an obstructed view from your seat, you should always adjust your seat as high as possible, while staying comfortable.

Answer:

A

Explanation:

I put high and got it right.

Answer:

The work transfer per unit mass is approximately 149.89 kJ

The heat transfer for an adiabatic process = 0

Explanation:

The given information are;

P₁ = 1 atm

T₁ = 70°F = 294.2611 F

P₂ = 5 atm

γ = 1.5

Therefore, we have for adiabatic system under compression

\(T_{2} = T_{1}\cdot \left (\dfrac{P_{2}}{P_{1}} \right )^{\dfrac{\gamma -1}{\gamma }}\)

Therefore, we have;

\(T_{2} = 294.2611 \times \left (\dfrac{5}{1} \right )^{\dfrac{1.5 -1}{1.5 }} \approx 503.179 \ K\)

The p·dV work is given as follows;

\(p \cdot dV = m \cdot c_v \cdot (T_2 - T_1)\)

Therefore, we have;

Taking air as a diatomic gas, we have;

\(C_v = \dfrac{5\times R}{2} = \dfrac{5\times 8.314}{2} = 20.785 \ J/(mol \cdot K)\)

The molar mass of air = 28.97 g/mol

Therefore, we have

\(c_v = \dfrac{C_v}{Molar \ mass} = \dfrac{20.785}{28.97} \approx 0.7175 \ kJ/(kg \cdot K)\)

The work done per unit mass of gas is therefore;

\(p \cdot dV =W = 1 \times 0.7175 \times (503.179 - 294.2611) \approx 149.89 \ kJ\)

The work transfer per unit mass ≈ 149.89 kJ

The heat transfer for an adiabatic process = 0.

Bridges use MAC addresses to determine whether to forward traffic.

MAC (Media Access Control) addresses are unique identifiers assigned to network interface controllers (NICs) by the manufacturer. These addresses are used in Ethernet and Wi-Fi networks to uniquely identify devices at the hardware level. A MAC address is a 48-bit (6-byte) hexadecimal value, typically displayed in the format of six groups of two hexadecimal digits separated by colons or hyphens (e.g., 00:1A:2B:3C:4D:5E). They maintain a table of MAC addresses and corresponding ports, and use this information to decide where to send incoming traffic. They do not rely on IP addresses or traffic conditions at the time, and they do not forward all traffic indiscriminately.

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The resisting arm is the horizontal distance between the vertical through the center of gravity and the point where the weight of the building acts. Since the weight of the building acts at the building's center of gravity, the resisting arm is zero. Therefore, the resisting moment is zero.Resisting moment = 0 ft-lb/ft.The overturning moment is greater than the resisting moment, indicating that the building will overturn.

Overturning of a Structure: Calculation of overturning and resisting momentsWe can calculate the overturning and resisting moments of the given 100 ft wide × 200 ft high × 50 ft deep ft building subjected to a uniformly distributed horizontal (lateral) load of 50 psf on its broad face as follows:a) Calculation of overturning momentThe overturning moment is given by the product of the lateral force and the overturning arm.The overturning arm is the horizontal distance between the vertical through the center of gravity and the point where the lateral force acts. Since the building is symmetrical, the center of gravity is at the building's center. The overturning arm is half the building's width. Therefore, the overturning moment is given by;Overturning moment = 50 psf × 100 ft / 2 × 200 ft = 12,500 ft-lb/ftb) Calculation of resisting momentThe resisting moment is the product of the weight of the building and the resisting arm.

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Answer:

I think it's 23 ohms.

Explanation:

Not entirely sure about it.

hope this helps

Required value of interval x[2]= sin(4π / 9)

We have a sampled signal, x[n] from a sinusoidal signal xt=sin(Ωt) with a period T=18 seconds.

The time interval between samples is T_sample 10 seconds/sample and we want to calculate the value of x[2].

Mathematically, the relation between continuous-time and discrete-time signals is given by: x[n] = x(nT_sample)where T_sample is the sampling interval.

In this problem, we have T_sample = 10 seconds/sample.

Hence, the relation between the continuous-time sinusoidal signal xt and the discrete-time signal x[n] can be written as: x[n] = x(nT_sample) = x(n*10) = sin(Ω*n*T_sample) = sin(Ω*n*10)

Also, we know that the period of the continuous-time signal is T=18 seconds.

Hence, we can write Ω as: Ω=2π/T=2π/18

The value of x[2] is:x[2] = sin(Ω*2*10) = sin(Ω * 20)x[2] = sin(2π/18*20)x[2] = sin(20π/18)

Using the fact that sin(θ) = sin(θ+2πk), we can write:x[2] = sin(20π/18) = sin(20π/18+2π) = sin(20π/18-2π) = sin(8π/18) = sin(4π/9)

Hence, the value of x[2] is sin(4π / 9).

Therefore, the answer is: x[2] = sin(4π / 9).

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Both Technician A and Technician B are correct in their statements.

Technician A is correct in stating that engine vacuum is typically measured in inches of mercury (in. Hg).

Engine vacuum refers to the difference in pressure between the inside and outside of the engine. It is commonly measured using a vacuum gauge, and the unit of measurement is inches of mercury.

The vacuum gauge displays the amount of vacuum present in the engine by measuring how far the pressure deviates below atmospheric pressure, which is typically expressed in inches of mercury.

Technician B is also correct in stating that a pressure gauge labeled psig (pounds per square inch gauge) will read 14.7 psi (pounds per square inch) at sea level.

The abbreviation "psig" indicates that the pressure is measured relative to atmospheric pressure. At sea level, atmospheric pressure is approximately 14.7 psi.

Therefore, a pressure gauge labeled psig will read 14.7 psi when the pressure being measured is equal to atmospheric pressure.

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Answer:

\(I=3A\)

Explanation:

From the question we are told that:

Number of lamps \(N=4\)

Potential difference \(V=60v\)

Total Resistance of the lamp is \(R= 20ohms\)

Generally the equation for Current I is mathematically given by

 \(I=\frac{V}{R}\)

 \(I=\frac{60}{20}\)

 \(I=3A\)

The air density for the given conditions is approximately 1.175 kg/m^3.To calculate the air density using the aerodynamic version of the perfect gas law, we can use the following equation: ρ = P / (R * T)

Where:

ρ is the air density (in kg/m^3)

P is the air pressure (in Pa)

R is the specific gas constant function for air (approximately 287 J/(kg·K))

T is the absolute temperature (in Kelvin)

To convert the given values:

Air temperature (15°C) needs to be converted to Kelvin by adding 273.15:

T = 15°C + 273.15 = 288.15 K

Air pressure (83 kPa) needs to be converted to Pascals by multiplying by 1000:

P = 83 kPa * 1000 = 83,000 Pa

Now, we can substitute the values into the equation:

ρ = P / (R * T)

  = 83,000 / (287 * 288.15)

  ≈ 1.175 kg/m^3

Therefore, the air density for the given conditions is approximately 1.175 kg/m^3.

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The common protocols used by MTAs to send messages to MUAs are:

a. SMTP

d. POP3

SMTP (Simple Mail Transfer Protocol) is the most common protocol used by MTAs to send messages to other MTAs or to MUAs.

POP3 (Post Office Protocol version 3) is a protocol used by MUAs to retrieve email messages from a mail server. While it is not used by MTAs to send messages, it is still a common protocol used in email communication.

NNTP (Network News Transfer Protocol) is a protocol used for distributing, reading, and posting news articles in Usenet newsgroups. It is not commonly used for email communication.

IMAP (Internet Message Access Protocol) is a protocol used by MUAs to access email messages stored on a remote server. It is not used by MTAs to send messages.

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Sure! Here's an example MATLAB program that solves a system of linear equations using Cramer's Rule for a 3x4 matrix:

```matlab

% Input the coefficient matrix

A = input('Enter the coefficient matrix A (3x3): ');

% Input the constant matrix

B = input('Enter the constant matrix B (3x1): ');

% Calculate the determinant of the coefficient matrix

det_A = det(A);

% Initialize the solution vector

X = zeros(3, 1);

% Apply Cramer's Rule

for i = 1:3

   % Create a temporary matrix by replacing the i-th column with the constant matrix

   temp_A = A;

   temp_A(:, i) = B;

   % Calculate the determinant of the temporary matrix

   det_temp_A = det(temp_A);

   % Calculate the solution for the i-th variable

   X(i) = det_temp_A / det_A;

end

% Display the solution

disp('The solution for the system of linear equations:');

disp(X);

```

In this program, the user is prompted to enter the coefficient matrix `A` (3x3) and the constant matrix `B` (3x1). The determinant of matrix `A` is calculated using the `det` function in MATLAB. The program then uses a loop to apply Cramer's Rule by replacing each column of `A` with `B` and calculating the determinants of the resulting matrices. Finally, the solution vector `X` is displayed, representing the values of the variables in the system of linear equations.

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The SAFe Lean-Agile principles form the foundation of the framework and guide organizations in adopting an agile mindset.

SAFe (Scaled Agile Framework) is a methodology for scaling agile practices to larger organizations. The SAFe Lean-Agile principles form the foundation of the framework and guide organizations in adopting an agile mindset. The nine SAFe Lean-Agile principles are:

1)Take an economic view: Understand and optimize the flow of value through the organization to drive economic outcomes.

2)Apply systems thinking: Consider the organization as a complex system of interdependent parts and optimize the whole, not just the individual components.

3)Assume variability and preserve options: Embrace uncertainty and variability by creating options for decision-making as late as possible.

4)Build incrementally with fast, integrated learning cycles: Build solutions incrementally through fast feedback loops to ensure that they meet the customer's needs.

5)Base milestones on objective evaluation of working systems: Define milestones based on working systems, not on intermediate artifacts or milestones.

6)Visualize and limit WIP (work in progress), reduce batch sizes, and manage queue lengths: Limit the amount of work in progress to reduce lead time and increase efficiency.

7)Apply cadence, synchronize with cross-domain planning: Establish a regular, predictable cadence for all work and align planning across domains to enable cross-functional collaboration.

8)Unlock the intrinsic motivation of knowledge workers: Foster a culture that supports autonomy, mastery, and purpose to motivate and engage knowledge workers.

9)Decentralize decision-making: Empower those closest to the work to make decisions and enable decentralized decision-making across the organization.

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Answer:

1) Make a hypothesis, about what u think will happen if you do something

2) conduct the experiment

3) analyze and see what happens

4) do it several more times and  compare ur answers

5) make a conclusion from ur answers

6) celebrate bc u done

Answer:

d. To Murrow, Hitler was a threat to all of civilization

Explanation:

For Murrow, Hitler's rise was a serious problem and a major threat to the entire civilization. For this reason, he believed that covering news about Hitler's advance and the battles of Nazi Germany was essential, even if the American population did not see Hitler as a threat and the European population, believed that these reprotations were only a way to denigrate the image of the continent to the world.

For Murrow reporting on Hitler's actions was as important as reporting on natural disasters.

All electrified locks utilize the principle of electromagnetism to lock and unlock a security portal.

 When the lock is energized, the magnetic field is activated, causing the lock's armature plate to be attracted and securely held against the electromagnet or magnetic plate on the door frame.

To unlock the security portal, the electrical current is interrupted, and the magnetic field is deactivated. This releases the armature plate, allowing the door to be opened. The process of locking and unlocking the portal is controlled by an access control system or electronic control device, which sends signals to the electrified lock to energize

This principle of using electromagnetism provides a strong and reliable method for securing doors and controlling access in various settings, such as commercial buildings, institutions, and high-security facilities.

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Answer:

a. To solve this problem, we can use the binomial probability formula:

P(X=k) = (n choose k) * p^k * (1-p)^(n-k)

where:

- X is the number of out-of-state vehicles in a sample of n vehicles

- k is the number of out-of-state vehicles we're interested in (in this case, k=3)

- p is the probability that a given vehicle is from out of state (in this case, p=0.25)

- n is the sample size (in this case, n=9)

Plugging in the values, we get:

P(X=3) = (9 choose 3) * 0.25^3 * 0.75^6

       = 84 * 0.0039 * 0.1785

       = 0.5907%

Therefore, the probability that exactly three of the next 9 vehicles are from out of state is 0.5907%.

b. To find the expected number of out-of-state vehicles in the next hour, we can use the formula:

E(X) = n * p

where:

- X is the number of out-of-state vehicles in a sample of n vehicles

- p is the probability that a given vehicle is from out of state (in this case, p=0.25)

- n is the sample size (in this case, n=140)

Plugging in the values, we get:

E(X) = 140 * 0.25

    = 35

Therefore, the expected number of vehicles from out of state in the next hour is 35.

c. To find the probability of the number of vehicles varying between 2 standard deviations from the mean number of those passing through the check point, we need to find the mean and standard deviation of the number of out-of-state vehicles in a sample of 140 vehicles.

The mean is simply the expected value we found in part b:

mean = 35

The variance of a binomial distribution is:

Var(X) = n * p * (1-p)

where:

- X is the number of out-of-state vehicles in a sample of n vehicles

- p is the probability that a given vehicle is from out of state (in this case, p=0.25)

- n is the sample size (in this case, n=140)

Plugging in the values, we get:

Var(X) = 140 *

hope this helps :o

The non-linearity error as a percentage of the full-scale reading at 100 degree C  is - 0.89%.

Non-linearity error is defined as the biggest deviation from a straight line linking the output signal to the applied force, known as the "best straight," that the calibration curve makes. In order to eliminate second order nonlinearity, the sensor signal conditioning system feeds a portion of the output signal back to the sensor.

If EMF and Celsius temperature have a proportional relationship, then the recorded value of EMF at 100 °C will be understood to be a temperature of.

T/5.268 = 400/21.846

T = 5.268(400/21.846) ≈ 96.457 °C

As a percentage of the full scale, the mistake is

(96.457 -100)/400 × 100% ≈ -0.886%

Thus, the non-linearity error as a percentage of the full-scale reading at 100 degree C  is - 0.89%.

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The electric field given by E = 2(av - jaz) is a left-hand circularly polarized wave.  (Option A)

The real part of the equation,  2a(v)i, represents a wave with a sinusoidal variation in the x  -direction.

The imaginary   part of the equation,2a(z)j, represents a wave with a sinusoidal variation in the z-direction. The direction of polarization of a wave is given by the direction of the electric field vector.

In this case,the electric field vector is rotating in a counterclockwise direction, which is the definition of left  -hand circular polarization.

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Explanation:

current- amperes

resistance- ohms

voltage- volts

electrical energy- kilowatt hours

electrical power- watts

hope it helps!

A fast axonal transport method that uses proteins to convey the materials quickly is known as retrograde axoplasmic transport.

Typically, the bilayer structure of the cell membrane contains membrane proteins. The role of membrane protein primary function is that of a carrier. They convey the required elements into the cell by facilitating the entrance of molecules that cannot enter the cell on their own. Between the cell's internal and external environments, the membrane receptor proteins act as signal relays. Protein filaments give the cell structural support in terms of support. These proteins move the materials along the cytoskeletal microtubule surfaces of nerve cells. The chemicals are moved from the terminal ends of the axon towards the soma or cell body through retrograde axoplasmic transport. Most of the materials that need to be recycled or broken down are moved via this sort of axonal transport.

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This statement is True: one large problem designers face when designing air-cooled refrigeration and air conditioning equipment is a changing ambient from the changing seasons.

Now more than ever, from tiny startups to Fortune 500 companies, design-driven thinking is everywhere. Success depends more and more on a company's ability to incorporate design into its core beliefs. Even with these victories, diversity is still one of design's major threats.

The lack of diversity among computer industry employees has received much attention. It is reported that efforts are being made to increase diversity among tech staff members, including designers and engineers. Nevertheless, the numbers have barely changed during the last two years. The majority of conference speakers, press subjects, and design leadership are still white men.

Those of us who are fortunate enough to already work in this sector must take more initiative. It must begin at the individual level. It is insufficient to attribute the lack of applications from women and people of color to the "pipeline."

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The first step in cleaning a firearm is to ensure that the muzzle is (B) pointed in a safe direction. This is essential to prevent accidental discharge and ensure the safety of everyone in the vicinity. Before handling a firearm, it is crucial to always point it in a safe direction, such as toward a backstop or a designated safe area.

Once the firearm is pointed in a safe direction, the next step is typically to field strip the firearm. This involves disassembling the firearm to its basic components for thorough cleaning. It is important to refer to the firearm's manual or consult a professional gunsmith for specific instructions on how to field strip the particular firearm properly.

After field stripping, the cleaning process can begin. It is important to use cleaning solvents in a well-ventilated area to avoid inhaling any potentially harmful fumes. It is also important to follow the instructions on the cleaning solvents and use appropriate cleaning tools to avoid damaging the firearm.

Therefore, the correct answer to the question is b) Point the muzzle in a safe direction. This is the first and most critical step in cleaning a firearm, and it should always be followed to ensure the safety of everyone involved.

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If an engine fails during rollout or just before takeoff, immediately shut both throttles and land the aircraft safely. Before reaching a safe single engine speed right away after takeoff, drop your nose to increase velocity.

Closing the throttle, turning off the fuel pump, setting the mixture control to idle cutoff, and simply cranking the engine is the most reliable hot start method I've found.

If an engine fails during rollout or just before takeoff, immediately shut both throttles and land the aircraft safely. Before reaching a safe single engine speed right away after takeoff, drop your nose to increase velocity. If you are unable to climb, close both throttles and land straight ahead.

The typical practice for the majority of aircraft would be to abandon takeoff if an engine failed during takeoff. In small aircraft, the pilot should turn the throttles down to idle, activate the speed brakes (if provided), and apply the brakes as needed if the engine fails before VR (Rotation Speed).

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Answer:

A tax is a monetary payment without the right to individual consideration, which a public law imposes on all taxable persons - including both natural and legal persons - in order to generate income. This means that taxes are public-law levies that everyone must pay to cover general financial needs who meet the criteria of tax liability, whereby the generation of income should at least be an auxiliary purpose. Taxes are usually the main source of income of a modern state. Due to the financial implications for all citizens and the complex tax legislation, taxes and other charges are an ongoing political and social issue.

I dont know I asked this to

Explanation:

Answer:

One corner ( D )

Explanation:

when dimensioning the location of a house on site the standard and the acceptable procedure is to ; Dimension One corner of the house

Adjacent lots is a term used to describe parcels of the site that meet each other along their boundary lines. and they also include parcels that may be separated by streets