What material property does the Charpy test determine? (a) Yield strength (b) Fracture strength (c) Young's modulus (d) Toughness (e) Ductility

Answer:

Electric shock

Explanation:

hope this helps

p.s. the next question is Flexible

Technician A and Technician B both are correct as brake fluid that is allowed to remain uncovered does absorb water and brake fluid can damage the paint on a vehicle's fender if it is accidentally spilled.

Technician A is correct because brake fluid is hygroscopic, which means it absorbs moisture from the atmosphere. This water can corrode brake parts and lead to failure, as well as increase the fluid's boiling point, leading to brake fade and reduced stopping power.
Technician B is also correct because brake fluid is made up of corrosive materials that can break down paint and other surfaces. If the brake fluid is not cleaned off the fender immediately, it can cause permanent damage to the paint.

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Answer:

Your house is in need of a service upgrade, or it may indicate that your house has too few circuits.

Explanation:

It's a sign that you are making excessive demands on the circuit and need to move some appliances and devices to other circuits.

The tatal resistance of the series-parallel circuit with two resistor connected in parallel which combination is connected in series to a single resistor is 9 ohms.

This can be defined as the opposition to current flow in a circuit.

To calculate the total resistance, first we need to find the total resistance of the parallel resistor.

For parallel,

Where:

R' = Total resistance of the parallel resistor.

From the question,

Given:

Substitute these values into equation 1

Finally, we combine the effective parallel resistance in series to the single resistance to the the total resistance of the circuit.

Where:

From the question,

Substitute these values into equation 2

Hence, the total resistance of the circuit is 9 ohms.

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This scenario can be described as an experimental study. An experiment involves manipulating variables to observe the effects on an outcome.

In this case, the highway department manipulates the type of concrete used (Type A and Type B) and observes the time taken for cracks to appear in each section. The explanation for this conclusion is that by actively controlling the type of concrete used, the department can compare the performance and durability of both types, allowing them to make informed decisions about which concrete is more suitable for future use. In an observational study, no variables would be intentionally manipulated; rather, the researcher would simply observe and gather data without any intervention.

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Answer:

1) 4.41 * 10^-4 kw

2) 2.20 * 10^-4 kw

Explanation:

Given data:

Filter = 500 m^3/min

dust velocity = 3g/m^3

bag ; length = 3 m , diameter = 0.13 m

change in pressure = 1 kPa

efficiency = 60%

1) Calculate the Fan power

First :

Calculate the total dust loading = 3 * 500 = 1500 g

To determine the Fan power we will apply the relation

\(n_{o} = \frac{\frac{p}{eg*Q*h} }{1000}\)    = \(\frac{\frac{p}{(3*10^{-3})* 981*( 500/60) *3 } }{1000}\)

fan power ( \(n_{0}\) ) = 4.41 * 10^-4 kw

2) calculate power drawn

change in P = 6 atm = 6 * 10^5 pa

efficiency compressor = 50%

hence power drawn = 4.41 * 10^-4 kw  * 50% = 2.20 * 10^-4 kw

Answer:

a). \($0.0436 \ ft^3/s$\) , \($2.72 \ lb \ m/s$\)

b). \($61.32 \ s$\)

c). 32. ft/s

Explanation:

a). The volume flow rate of the water is given by :

\($\dot V = uA$\)

   \($=u \pi \left( \frac{d}{2}\right)^2$\)

   \($=\frac{u \pi d^2}{4}$\)

   \($=\frac{8\ ft/s \ \pi \left(\frac{1}{12}\right)^2}{4}$\)

    \($= 0.0436 \ ft^3/s$\)

The mass flow rate of the water is given by :

\($\dot m = \rho \dot V$\)

    \($= 62.4 \times 0.0436$\)

    \($=2.72 \ lb \ m/s$\)

b). The time taken to fill the container is

     \($\Delta t = \frac{V}{\dot V}$\)

          \($=\frac{20 \ gal}{0.0436 \ ft^3/s}\left( \frac{1 \ ft^3}{7.4804 \ gal}\right)$\)

          \($=61.32 \ s$\)

c). The average velocity at the nozzle is :

\($u=\frac{\dot V}{A}$\)

  \($=\frac{\dot V}{\frac{\pi d^2}{4}}$\)

  \($=\frac{0.0436}{\frac{\pi \left(\frac{0.5}{12}\right)^2}{4}}$\)

  = 32. ft/s

Technician A and Technician B are correct in their assessments. A restricted vacuum feed hose can cause loss of Braking assistance after several quick brake applications, and brake fluid in the vacuum feed hose can indicate a leaking master cylinder seal.

Technician A is correct in saying that a restricted vacuum feed hose may cause a loss of assist after several quick brake applications. This is because the vacuum feed hose provides necessary vacuum pressure to the brake booster, which assists in braking. If the hose is restricted, the brake booster may not receive adequate vacuum pressure, leading to a decrease in braking assistance after multiple quick brake applications.
Technician B is also correct in stating that brake fluid in the vacuum feed hose can indicate a leaking master cylinder seal. The master cylinder contains brake fluid and is responsible for converting the driver's input through the brake pedal into hydraulic pressure. A leaking master cylinder seal can allow brake fluid to enter the vacuum feed hose, which is not designed to handle such fluids. This can be an indication that the master cylinder needs repair or replacement.
In conclusion, both Technician A and Technician B are correct in their assessments. A restricted vacuum feed hose can cause loss of braking assistance after several quick brake applications, and brake fluid in the vacuum feed hose can indicate a leaking master cylinder seal.

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Answer:

Q ≅ 1.53 m³/s

Explanation:

From the given information:

The flow rate of the orifice is:

\(v = c_v \sqrt{2gh}\)

\(v = 0.90 \times \sqrt{2*9.81 * 10}\)

where;

\(Q = c_d \times \sqrt{2gh} \times A\); &

\(c_d = c_c \times c_v\)

∴

\(Q = c_c \times c_v \sqrt{2gh} \times \dfrac{\pi}{4}\times d^2\)

\(Q = 0.90 \times 0.62 \sqrt{2*9.81*10} \times \dfrac{\pi}{4}\times 0.5^2\)

\(Q = 0.558 \times 14.00714104 \times 0.1963495408\)

Q ≅ 1.53 m³/s

In both the `PokerHand` and `BlackjackHand` classes, the following member functions must be overridden:

1. `getValue()` or `getScore()`: This function calculates and returns the value or score of the hand in the respective game (poker or blackjack).

2. `isBust()`: This function determines whether the hand has exceeded the maximum allowable value in blackjack (typically 21) and returns a boolean indicating if the hand is bust.

3. `isWinningHand()`: This function evaluates whether the hand is a winning hand based on the game rules and returns a boolean indicating the result.

These member functions need to be overridden in both classes to provide the specific behavior and logic required for each game.

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Answer: A, B, C or D

Explanation: its either those

In the two scenario above concerning port fuel-injection and sequential fuel injectors, only Technician b is correct.

A vehicle often has one fuel injector per cylinder and if one has a four-cylinder car, it would also have four fuel injectors.

Note that Fuel-pressure regulators that are found on a port fuel-injected systems is one that often work with injector pressures that is said to be of 30 to 55 PSI.

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The dual problem of a linear programming problem can be found by flipping the inequality signs and re-assigning the objective function as a constraint.

Given the following linear programming problem min 4x1 - 3 x2 subject to 3x1 - x2 ≤ 6 5x1 - 4x2 ≥ 8 x1 - 6x2 =5 x1, x2 ≥ 0To find the dual of the problem, the following steps can be taken:

Step 1: Flip the problem The first step in finding the dual problem is to flip the inequality signs of the constraint of the original problem. The constraints of the original problem are as follows:3x1 - x2 ≤ 65x1 - 4x2 ≥ 8x1 - 6x2 = 5Flipping the inequality signs of the above equations results in the following:3x1 - x2 ≥ 65x1 - 4x2 ≤ 8x1 - 6x2 = 5

Step 2: Re-assign the objective The next step is to re-assign the objective function of the original problem as a constraint. That is, the coefficients of the original objective function are used as constraints in the dual problem. Thus, for the given problem,

we have:4x1 - 3x2 = x0Step 3: Formulate the dual problem The dual problem can now be formulated by using the re-assigned objective function and the flipped inequality signs of the original problem. The coefficients of the original problem form the new objective function of the dual problem, while the flipped inequalities form the constraints of the dual problem. Therefore, the dual problem of the given problem is: minimize 6y1 + 8y2 + 5y3, subject to:3y1 + 5y2 + y3 ≥ 4- y1 - 4y2 - 6y3 ≥ -3Where y1, y2 and y3 are the dual variables corresponding to the original constraints. Thus, the dual problem of the given problem has been found.

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Answer:

Some ways that an operations manager may alter operations to meet customer demand include understanding who the customer is (this could be conducted through surveys and feedback opportunities for the customer) and making stock demand be more efficient to meet customer demand.

6.8÷1.5 = 4.53...

So, it's 4 pipe with some left over.

Hope this helps!

Answer:

a

Explanation:

The shear plane angle is calculated as 49.4 degrees while the shear strain is given as 1.17

Shear strain is a measure of deformation resulting from an applied force that is parallel to the surface of an object. It is usually expressed as a fractional change in the length of the object. Shear strain is a measure of the displacement of the surface points of an object in the direction perpendicular to the direction of the applied force.

The shear plane angle is the angle between the plane of shear stress and the normal to the plane of shear. It is typically measured in degrees and can range from 0 to 90 degrees.

(a) Shear plane angle = tan⁻¹((0.65-0.30)/0.30) = 49.4°

(b) Shear strain = (deformed chip thickness - initial chip thickness)/initial chip thickness

Substituting the values into the formula;

Shear Strain = (0.65-0.30)/0.30 = 1.17

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Answer:

to keep the battery charged when the vehicle is running, it also helps the battery keep the electrical components in your vehicle charged

Explanation:

Answer:

Tech A and Tech B are correct

Explanation:

Tech A is correct because radial ply tires have more flexible sidewalls than radial tires due to the fact that radial tires make use of two or more layers of casing piles and are thus not much flexible.

Also, tech B is correct because bias-ply tires typically have more durable construction than radial tires

Answer:

The value of R is 10101

Explanation:

As per the given data

D = 1000100100

G = 100101

Redundant bit = 6-bits - 1-bit = 5-bits

No add fice zero to D

D = 100010010000000

Now calculate R as follow

R = D / G

R = 100010010000000 / 100101

R = 10101

Workings are attached with this question

The sharp boundaries of expression of the eve stripe 2, also known as the even-skipped stripe 2, are formed through a combination of genetic regulatory mechanisms and interactions between different genes and proteins.

The process can be summarized as follows:

1. Gap genes: Gap genes are a group of genes expressed in broad domains along the anterior-posterior axis of the embryo.

2. Pair-rule genes: Pair-rule genes are expressed in alternating stripes within the embryo. They are regulated by a combination of maternal gradients and interactions with other genes. The expression of pair-rule genes helps to refine and establish the boundaries of eve stripe 2.

Through the combination of these genetic regulatory mechanisms, interactions between genes, enhancer elements, and morphogen gradients, the sharp boundaries of expression of eve stripe 2 are established during embryonic development.

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An automobile travels along a straight road at 15.65 m/s through a 11.18 m/s speed zone. A police car observed the automobile. At the instant that the two vehicles are abreast of each other, the police car starts to pursue the automobile at a constant acceleration of 1.96 m/s2 . The motorist noticed the police car in his rear view mirror 12 s after the police car started the pursuit and applied his brakes and decelerates at 3.05 m/s2

Find the total time required for the police car  to over take the automobile.

Answer:

15.02 sec

Explanation:

The total time required for the police car to overtake the automobile is related to the distance covered by both  cars which is equal from instant point of abreast.

So; we can say :

\(D_{pursuit} =D_{police}\)

By using the second equation of motion to find the distance S;

\(S= ut + \dfrac{1}{2}at^2\)

\(D_{pursuit} = (15.65 *12 )+(15.65 (t)+ (\dfrac{1}{2}*(-3.05)t^2)\)

\(D_{pursuit} = (187.8)+(15.65 \ t)-0.5*(3.05)t^2)\)

\(D_{pursuit} = (187.8+15.65 \ t-1.525 t^2)\)

\(D_{police} = ut _P + \dfrac{1}{2}at_p^2\)

where ;

u  = 0

\(D_{police} = \dfrac{1}{2}at_p^2\)

\(D_{police} = \dfrac{1}{2}*(1.96)*(t+12)^2\)

\(D_{police} = 0.98*(t+12)^2\)

\(D_{police} = 0.98*(t^2 + 144 + 24t)\)

\(D_{police} = 0.98t^2 + 141.12 + 23.52t\)

Recall that:

\(D_{pursuit} =D_{police}\)

\((187.8+15.65 \ t-1.525 t^2)= 0.98t^2 + 141.12 + 23.52t\)

\((187.8 - 141.12) + (15.65 \ t - 23.52t) -( 1.525 t^2 - 0.98t^2) = 0\)

= 46.68 - 7.85 t -2.505 t² = 0

Solving by using quadratic equation;

t = -6.16 OR  t = 3.02

Since we can only take consideration of the value with a  positive integer only; then t = 3.02 secs

From the question; The motorist noticed the police car in his rear view mirror 12 s after the police car started the pursuit;

Therefore ; the total time  required for the police car  to over take the automobile = 12 s + 3.02 s

Total time  required for the police car  to over take the automobile = 15.02 sec

Answer:

There are a few key benefits to a pre-construction and design specialist taking an interdisciplinary approach:

To maximize employability options. Having exposure to different fields and skills makes a specialist a more versatile and attractive job candidate. They can work across multiple areas of design, planning, architecture and construction.

To draw on a varied creative tool set. Exposure to fields like architecture, engineering, economics, sustainability and more provides many perspectives and solutions to tapping into. This leads to more innovative and well-rounded design thinking.

To integrate well with other team members. Understanding the methods, priorities, constraints and languages of fields like architecture, engineering, planning, and construction allows a specialist to collaborate more effectively. They can translate across disciplines and facilitate joined-up thinking.

To understand constraints and optimally balance priorities. No design or pre-construction problem has limitless options. An interdisciplinary approach helps gain insights into the constraints each field operates under and how to optimize solutions across ecological, economic, functional and other priorities.

To consider impacts holistically. Many impacts, like environmental sustainability, cost efficiency and user experience, span multiple disciplines. An interdisciplinary mindset is needed to evaluate options based on overall impact, not just impacts within one area of focus.

Of these options, I believe "To integrate well with other team members" is the strongest summary of why an interdisciplinary approach is so valuable for this type of specialist role. Understanding other fields in depth helps in collaborating, communicating clearly, addressing concerns proactively and finding optimal compromise - all of which are key to successfully interweaving different areas of expertise on a team.

Explanation:

In civil engineering, At a significance level of 0.05 and 18 degrees of freedom (df = n1 + n2 - 2), the critical T-value is 2.101 for a two-tailed test.

Z-test Example: Suppose a construction company claims that the average strength of the concrete used in its buildings is 5000 psi. To test this claim, a sample of 25 concrete blocks is taken from the company's latest project and tested for strength. The mean strength of the sample is found to be 4800 psi with a standard deviation of 300 psi. Using a Z-test, the engineer can determine whether the company's claim is true or not.

T-test Example: Suppose an engineer wants to determine whether there is a significant difference in the compressive strength of concrete cylinders cured in water and those cured in air. To test this hypothesis, the engineer takes a sample of 10 concrete cylinders cured in water and 10 concrete cylinders cured in air. The mean compressive strength of the water-cured cylinders is found to be 5000 psi with a standard deviation of 250 psi.

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During program increment (PI) execution, the release train engineer (RTE) has several responsibilities. Here are two of them:

1. Facilitating PI Planning: The RTE plays a crucial role in facilitating the PI Planning event. They coordinate and orchestrate the event to ensure effective collaboration and alignment among the teams and stakeholders. The RTE helps establish the PI objectives, guides the teams in breaking down the features and stories, and facilitates the creation of a realistic and achievable PI plan.

2. Managing and Resolving Impediments: The RTE is responsible for identifying, managing, and resolving impediments that may arise during the PI execution. They actively monitor the progress of the Agile Release Train (ART), identify any obstacles or blockers that hinder the team's progress, and work with the teams and stakeholders to address them effectively. The RTE acts as a servant leader, providing support and guidance to overcome challenges and ensure the smooth execution of the PI.

These responsibilities highlight the RTE's role in facilitating collaboration, aligning teams, and removing obstacles to ensure successful PI execution within the Agile Release Train.

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The correct answer is A pilot will make an emergency landing if all of the plane's engines quit at once. The pilot will start looking for a secure spot to make an emergency landing while the aircraft descends and decelerates.

A landing during an emergency is known as an emergency landing. This does not always occur on a runway. You can land in an emergency in a field, on the sea, a tree, etc. Precautionary landing: a deliberate on- or off-airport landing when more flying is possible but not advised. Deteriorating weather, getting lost, a lack of fuel, and slowly building engine trouble are a few situations that could necessitate a precautionary landing. Powerful precautionary landings are done in the event of a genuine emergency. With a dead engine, forced landings are performed. A forced landing on water is known as a ditching. Their fatality rates are a key difference between the three.

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Answer:

Explanation:

\(r_2=\)∞

\(q=4\pi kT_1(T_2-T_1)\\\)

\(q=2\pi kD.\)ΔT--------(1)

\(q=hA\) ΔT\(=4\pi r_1^2(T_2_s-T_1_s)\\\)

\(N_u=\frac{hD}{k} = 2+\frac{0.589 R_a^\frac{1}{4} }{[1+(\frac{0.046}{p_r}\frac{9}{16} )^\frac{4}{9} } ------(3)\)

By equation (1) and (2)

\(2\pi kD.\)ΔT=h.4\(\pi r_1^2\)ΔT

\(2kD=hD^2\\\frac{hD}{k} =2\\N_u=\frac{hD}{k}=2\\\)-------(4)

From equation (3) and (4)

So for sphere \(R_a\)→0

Answer:

Fast Fourier ( FFT ) algorithms speed up computation of Fourier coefficients by simply reducing the the computing time of a traditional direct form  Fourier series. it  achieves this by breaking complex DFTS into smaller DFTS to reduce its complexity and in turn reduce its computing time

Explanation:

Fast Fourier ( FFT ) algorithms speed up computation of Fourier coefficients by simply reducing the the computing time of a traditional direct form  Fourier series. it  achieves this by breaking complex DFTS into smaller DFTS to reduce its complexity and in turn reduce its computing time. an example of such FFT is Cooley-Tukey algorithm