Which is not a design model of the software development life cycle? Select one. a) Waterfall model b) Agile model c) Sunshine model d) Big bang model

Possible candidate keys for this automobile dealership include the stock number and the vehicle identification number (VIN), as they are unique identifiers for each vehicle in the dealership's inventory.

The likely primary key would be the stock number or VIN, as they are both unique and can be used to easily search and retrieve information about a specific vehicle.A probable foreign key could be the invoice number, as it may be used to link vehicle information with the dealership's accounting system. For example, a sales transaction for a specific vehicle may reference the invoice number, which can be used to retrieve the invoice cost and other financial information.Potential secondary keys could include the make, model, year, and color of the vehicle. These fields can be used to search and filter the inventory based on specific criteria, such as finding all vehicles of a certain make or year.

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The resistance to bending increases by a factor of approximately 11.32 when using a W18 × 76 beam compared to a W8 × 31 beam about the x-x axis.

To calculate the factor by which the resistance to bending increases when using a W18 × 76 beam compared to a W8 × 31 beam, we need to consider the moment of inertia (I) of the beams. The resistance to bending is directly proportional to the moment of inertia.

The moment of inertia for a beam can be calculated using the following equation:

I = (1/12) * b * h^3

where:

- I is the moment of inertia

- b is the width of the beam's cross-section

- h is the height of the beam's cross-section

For the W18 × 76 beam:

- b = 6.97 inches

- h = 17.9 inches

Calculating the moment of inertia for the W18 × 76 beam:

I1 = (1/12) * 6.97 * (17.9)^3

For the W8 × 31 beam:

- b = 8.03 inches

- h = 7.99 inches

Calculating the moment of inertia for the W8 × 31 beam:

I2 = (1/12) * 8.03 * (7.99)^3

Now, we can find the factor by which the resistance to bending increases:

Factor = I1 / I2

Calculating the factor:

Factor =\([(1/12) * 6.97 * (17.9)^3] / [(1/12) * 8.03 * (7.99)^3]\)

After performing the calculation, we find that the factor is approximately 11.32.

Therefore, the resistance to bending increases by a factor of approximately 11.32 when using a W18 × 76 beam compared to a W8 × 31 beam about the x-x axis.

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The minimum pin diameter that meets as the reaction with the hoist 5 mm the design criteria of a safety of factor of 3 for bending stress Chuck + chuck handling tool is d = 4.5100 mm.

To check the amount of steel needed for each unit area, bending stress determination is required when designing an economical section. Only bending causes bending stress to exist. Every section of a beam experiences shear forces and bending moments when it is subjected to external loads. Bending stress can also be determined from the bending moment.

Just like force and stress, bending stress and moment are analogous. Tensile loads cause concrete beams to bend when they are put under them. We should go into more detail about bending stress.

When an object is subjected to external load at any cross-section, the normal stress it can withstand is known as the "bending stress."

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Answer:

Engineers are a very beneficial contribution in which offers great solutions to national problems.

The molar volume of acetylene vapor at 247.1 K and 13.5 bar, using the Pitzer correlation for the second virial coefficient, is approximately 72.5 cm3/mol.

Explanation:

The Pitzer correlation can be used to estimate the second virial coefficient of a gas. The equation is given by B = (RTc)/(Pc) * (1 + m(1 - (T/Tc)^(0.5))) where B is the second virial coefficient, R is the ideal gas constant, Tc is the critical temperature, Pc is the critical pressure, T is the temperature, and m is the acentric factor.

Plugging in the given values and solving for B, we get B = -0.009413 m3/mol. Then, using the ideal gas law, V = RT/P, we can calculate the molar volume as V = (RT)/P = (8.314 J/mol-K * 247.1 K) / (13.5 bar * 10^5 Pa/bar) ≈ 0.0725 m3/mol ≈ 72.5 cm3/mol.

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The thermal efficiency of the Brayton cycle in the cold air standard of 25° C is 45.60 %. The correct option is A.

A Brayton cycle is the thermodynamic cycle used in the heat engine. The process has been comprised of the events as:

The given conditions in the Brayton cycle are:

Inlet Temperature (T₁) = 25° C

Inlet pressure (P₁) = 95 kPa

Outlet pressure (P₂) = 1100 kPa

The efficiency of the cycle (η) can be calculated as:

\(\eta = 1 - \dfrac {1}{\frac{P_2}{P_1}^{(\gamma-1)(\gamma)}}\)

γ is the specific heat ratio and is 1.4.

Substituting the values in the equation of efficiency:

\(\eta = 1 - \dfrac {1}{\frac{1100}{95}^{(1.4-1)(1.4)}}\\\eta = 1 - \dfrac {1}{8.421^{(\gamma-1)(\gamma)}}\\\\\eta = 45.60 \%\)

The efficiency of the Brayton cycle in the thermal conditions is 45.60%. The correct option is A.

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Your question is incomplete and most probably the complete question is:

In an ideal Brayton cycle, air is compressed from 95 kPa and 25°C to 800 kPa. Under cold air standard conditions, the thermal efficiency of this cycle is:

(a) 46%

(b) 54%

(c) 57%

(d) 39%

(e) 61 %

In conclusion, two-dimensional boron crystals offer structural stability, tunable properties, and a wide range of potential applications. Their unique properties make them attractive for various fields, from electronics to energy storage and catalysis. Ongoing research and development in this area continue to uncover new possibilities for these intriguing materials.

Two-dimensional boron crystals have gained significant attention due to their unique structural stability, tunable properties, and various applications. These crystals consist of a single layer of boron atoms arranged in a honeycomb lattice structure, similar to graphene.
1. Structural Stability: Two-dimensional boron crystals exhibit exceptional stability due to the strong covalent bonds between boron atoms in the lattice. This stability allows for the fabrication and manipulation of these crystals without their degradation.
2. Tunable Properties: The properties of two-dimensional boron crystals can be tuned by altering the lattice structure or introducing dopants. For example, by modifying the lattice, it is possible to change the bandgap, electronic and optical properties, making them suitable for a wide range of applications such as optoelectronics, catalysis, and energy storage.
3. Fabrication Techniques: Various fabrication techniques have been developed for the synthesis of two-dimensional boron crystals. One method involves growing them on substrates through chemical vapor deposition (CVD) or molecular beam epitaxy (MBE). Another technique involves exfoliating bulk boron crystals into thin layers, similar to the exfoliation of graphene from graphite.
4. Applications: Two-dimensional boron crystals hold great potential in many applications. Their unique properties make them attractive for use in electronic devices, such as transistors and sensors. They can also be utilized in energy storage devices, like batteries and supercapacitors, due to their high specific surface area and electrical conductivity. Additionally, their catalytic properties make them promising candidates for use in heterogeneous catalysis.
In conclusion, two-dimensional boron crystals offer structural stability, tunable properties, and a wide range of potential applications. Their unique properties make them attractive for various fields, from electronics to energy storage and catalysis. Ongoing research and development in this area continue to uncover new possibilities for these intriguing materials.

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The reason that  pressure tests of pressurized tanks such as steam boilers, pipes and tanks including gases such as nitrogen, air, oxygen, etc. with high pressure are carried out hydrostatically by using liquids such as water and hydraulic oil is because some of them are very volatile such as oxygen and can explode and as such the use of hydrostatic solvent can reduce its temperature.

The use of pressure tests is to ensure the integrity of equipment including pressure vessels, pipes, plumbing lines, gas cylinders, boilers, and fuel tanks, pressure tests are a non-destructive option. The piping codes demand that it be verified that a piping system can support its rated pressure and is leak-free.

Nitrogen is free from many of the issues that come with utilizing air or water for pressure testing because it is inert, odorless, and has a low moisture content. Additionally, thanks to portable nitrogen generators, nitrogen is perfect for testing in a range of places.

Tanks and pipes are subjected to hydrostatic pressure testing to check for leaks. A hydrostatic test is carried out by pressurizing the vessel or piping under test, filling it, and then checking for changes in the pressurization level.

Note that there is the district cooling or district heating systems, by performing a pressure test. In addition to ensuring proper operation, this kind of examination will enable us to identify any leaks in a specific pipe so that repairs may be completed.

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Answer:

Explanation:

From the information given:

a.

Using the equipartition theorem, the average energy of a molecule dor each degree of freedom is:

\(U = \dfrac{1}{2}k_BT\)

\(U = \dfrac{1}{2}nRT\)

For s degree of freedom

\(U = \dfrac{1}{2}snRT\)

However, the molar specific heat \(C_v = \dfrac{1}{n} \dfrac{dU}{dT}\)

Therefore, in terms of R and s;

\(C_v = \dfrac{1}{n} \dfrac{d}{dT} \begin{pmatrix} \dfrac{1}{2} snRT \end {pmatrix}\)

\(C_v = \dfrac{Rs}{2}\)

b.

Given that:

Cv=70.6Jmol⋅K and R=8.314Jmol⋅K

Then; using the formula  \(C_v = \dfrac{Rs}{2}\)

\(70.6 \ J/mol.K = \dfrac{(8.314 \ J/mol.K)\times s}{2}\)

\(70.6 \ J/mol.K \times 2= (8.314 \ J/mol.K)\times s\)

\(s= \dfrac{70.6 \ J/mol.K \times 2}{ (8.314 \ J/mol.K) }\)

s = 16.983

s \(\simeq\) 17

An agrarian and handicraft economy was replaced by one that was dominated by industry and machine manufacturing during the Industrial Revolution in modern history. The world as a whole was affected by this process after it started in Britain in the 18th century.

These first three industrial revolutions shaped our contemporary society. The world we live in underwent a fundamental transformation with the advent of each of these three innovations: the steam engine, the age of science and mass production, and the rise of digital technology. And right now, it's taking place once more, for the fourth time.

The term is frequently used to describe emerging technologies, or those expected to become available in the next five to ten years. It is typically reserved for technologies that are having, or are anticipated to have, significant social or economic effects.

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Note that, the length of the beam is 4 m. Substituting this value in the equation for I, we get:

We can use the formula for the maximum deflection of a simply supported beam with a point load at the center:

δmax = (FL^3)/(48E*I)

where δmax is the maximum deflection, F is the point load, L is the length of the beam, E is the modulus of elasticity, and I is the second moment of area about the neutral axis.

We can rearrange this formula to solve for I:

I = (FL^3)/(48E*δmax)

a) Second moment of area about the neutral axis:

Substituting the given values, we get:

I = (3010^3(L/2)^3)/(4817510^9*0.857)

I = 2.057×10^-8 L^3

b) Length L of the beam:

To solve for L, we need another equation relating the loads and dimensions of the beam. We can use the equation for the shear force at any point x along the beam:

V(x) = (F/2) - (1510^-3)(x - L/2)

where V(x) is the shear force at a distance x from one end of the beam.

We know that the maximum shear force occurs at the supports, where V(x) = 0. So we can solve for the distance from the supports to the point of maximum shear force:

(1510^-3)(L/2) = (30*10^3/2)

L = 4 m

Therefore, the length of the beam is 4 m. Substituting this value in the equation for I, we get:

I = 2.057×10^-8 * (4)^3

I = 0.132×10^-4 m^4

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Answer:

or is the strongest evenger she hulk

Explanation:

?????????

Answer:

Thor!

Explanation:

In Thor: Ragnarok he beat the Hulk in order for Hulk to win thor had to be electrocuted and in Avengers: Endgame Thor is seen holding open the  "Floodgates" and withstanding the radiation from a dying star, also the fact that Thor is a god means that he is all powerful and the rightful heir to the throne to Asgard, plus the fact that he has defeated Loki multiple times a feat that not even the Hulk has done.

At 1.2mpa pressure and 50c

What is pressure?
By pressing a knife against some fruit, one can see a straightforward illustration of pressure. The surface won't be cut if you press the flat part of the knife against the fruit. The force is dispersed over a wide area (low pressure).

a)Mass flow rate of the refrigerant
Therefore h1= condenser inlet enthalpy =278.28KJ/Kg
saturation temperature at 1.2mpa is 46.29C
Therefore the temperature of the condenser

T2 = 46.29C - 5
T2 = 41.29C

Now,
d)power consumed by compressor W = 3.3KW
Q4 = QL + w = Q4
QL = mR(h1-h2)-W
= 0.0498 x (278.26 - 110.19)-3.3
=5.074KW
Hence refrigerator load is 5.74Kg

(COP)r = 238/53
(Cop) = 4.490

Therefore the above values are the (a) mass flow rate of the refrigerant, b) the refrigerant load, c) the cop, and d) the minimum power input to the compressor for the same refrigeration load.

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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

Answer:

the answer is false

Explanation:

i took the advice of the other person and found a Quizlet that said false :)

i hope this helps :D

We can use the bending formula to determine the maximum deflection: = (5)

Deflection in structural engineering refers to the amount that a structural element is shifted under a load (because it deforms). It might be referring to a distance or an angle.

The maximum normal stress theory can be used to determine the major stress that is the biggest.

The following formula can be used to determine the bending stress:

σ_b = (M y) / I

The shear stress can be calculated using the following formula:

τ = VQ / It

where τ is the shear stress, V is the shear force, Q is the first moment of area, I is the area moment of inertia, and t is the thickness of the board.

M = (1/4) (100 kg) (9.81 m/s^2) (1.5 m)

M = 368.4 Nm

The area moment of inertia for a rectangle about its neutral axis is:

I = (1/12) b h^3

where b is the width of the rectangle and h is the height or thickness. Substituting the given dimensions, we get:

I = (1/12) (0.305 m) (0.032 m)^3

I = 1.034 x 10^-7 m^4

The distance from the neutral axis to the top surface of the board is half of the thickness:

y = (1/2) (0.032 m)

y = 0.016 m

Substituting these values, we get:

σ_b = (M y) / I

σ_b = (368.4 Nm) (0.016 m) / 1.034 x 10^-7 m^4

σ_b = 5.71 x 10^7 Pa

The shear force at any point along the board is:

V = (100 kg) (9.81 m/s^2)

V = 981 N

The first moment of area for a rectangle about its neutral axis is:

Q = (1/6) b h^3

Substituting the given dimensions, we get:

Q = (1/6) (0.305 m) (0.032 m)^3

Q = 3.45 x 10^-8 m^3

Substituting all the values, we get:

τ = VQ / It

τ = (981 N) (3.45 x 10^-8 m^3) / (1.034 x 10^-7 m^4)(0.032 m)

τ = 1.03 x 10^7 Pa

σ_max = (σ_b / 2) + √[(σ_b / 2)^2 + τ^2]

σ_max = (5.71 x 10^7 Pa / 2) + √[((5.71 x 10^7 Pa / 2)^2) + (1.03 x 10^7 Pa)^2]

σ_ma = 6.77 x 10^7 Pa

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Answer:

Then miss try to get your school to banned it for your district like forbid then from the web site then it will not allow them to use it. then sometimes use it to help other people who needs help like teachers do or we need help with something we dont know so we ask for help for a better understanding of it.

Explanation:

^-^ hope you have a good day miss or sir

Answer:

So I would love to say that you and your team at your school had banned brainly and why are you using brainly here, then you shouldn't use brainly, and brainly all students around the world gets help even you is one.

Answer:

In the simplest terms, bioremediation is a waste management process using live organisms to neutralize or remove harmful pollutants from contaminated areas. Bioremediation is an environmental science that amplifies natural biological actions to remedy or remediate polluted groundwater and contaminated soil.

Explanation:

In the simplest terms, bioremediation is a waste management process using live organisms to neutralize or remove harmful pollutants from contaminated areas. Bioremediation is an environmental science that amplifies natural biological actions to remedy or remediate polluted groundwater and contaminated soil.

TRUCK is to TRANSPORT as, GOAL is to REACH​.

Transportation can be defined as a process that involves the movement of humans, products, and other things from one geographical area to another, especially through various means (forms) such as the following:

A goal can be defined as an outcome statement and strategic objectives that defines what an individual or a group of people (team) hopes to successfully achieve (accomplish) or reach in the future i.e over a specific period of time.

In conclusion, we can reasonably infer and logically deduce that TRUCK is to TRANSPORT as, GOAL is to REACH​.

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Complete Question:

TRUCK is to TRANSPORT as ...

BASKET is to CART

CHORE is to CLEAN

WHEEL is to AXEL

BED is to REST

GOAL is to REACH​

Threshold braking is a braking technique that does not approach the point of wheel lock-up, but rather maintains the brakes just below the threshold of lock-up. The given statement is false.

The purpose of threshold braking is to maximize braking efficiency while still allowing the tires to maintain traction with the road surface. When the brakes are applied with maximum force and the wheels approach the point of lock-up, the tires lose their grip on the road, causing the vehicle to slide and potentially lose control.

To perform threshold braking correctly, the driver applies the brakes firmly and gradually increases pressure until just before the wheels are about to lock up. This requires a delicate balance and sensitivity on the driver's part to modulate the braking force to keep the tires on the verge of lock-up without actually crossing that threshold.

By staying below the lock-up threshold, the tires maintain their grip on the road, allowing for effective braking and steering control. This technique is particularly important in emergency situations or when braking on slippery surfaces.

Thus, the correct option is "False".

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A project is meant to achieve clearly defined goals within present constraints

The correct option for the source of work in a project which is NOT a source of authorized work to be performed is option (a)

a. Scope creep

The reason for the selecting the above option is as follows;

In project management, alongside work planned in a work package, authorized work to be performed can come from;

A scope creep, however, is generally is due to the inclusion of the end

users of the project at a time that is behind schedule, insufficient analysis of

the requirements, and project complexity underestimation. and consists of

changes made after a project has commenced

A scope creep therefore, changes the amount of work to be done which

therefore alters the project timeline, and due to project, budgetary, and

end user constraints, CANNOT be a source of authorized work to be

performed

The correct option for the source that is NOT a authorized work to be performed is option a. Scope creep

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Answer:

A.

Explanation:

The voltage change across a resistor is negative when you traverse in the opposite direction of the current.

Answer:

Terminal 2 on a potential relay typically goes to the start winding of a motor.

Explanation:

The potential relay is an electromechanical device used in some types of motors to provide a temporary boost to the starting torque. Terminal 2 is connected to the start winding to assist in starting the motor.

8.46 mL volume of liquid water (mL) would need to be consumed to over a two-hour period to replace the water loss from breathing.

What is Volume?

The space occupied within an object's borders in three dimensions is referred to as its volume. It is sometimes referred to as the object's capacity.

Given that;

Volume of air taken in each inhalation = 500 mL = 0.5 L

Relative moisture = 50

At 25 oC, vapor pressure of water = 23.8 mm Hg

Relative moisture = partial pressure of water vapor/ vapor pressure of liquid

Partial pressure of water vapor = Relative moisture * vapor pressure of liquid = 23.8 *0.5 = 11.4 mm Hg

intelligencers of gas exhaled is given as

n = PV/ RT

n = 1 *0.5/(0.0821 *( 37273.15)

n = 0.0196 intelligencers of gas/ 12minutes

For two hour period = 2 * 60 = 120 twinkles

intelligencers of air needed in 120 twinkles = 120 *0.0196/ 12 = 0.196 intelligencers of air

operative bit of nitrogen = 0.75

intelligencers of nitrogen = operative bit * total intelligencers = 0.75 *0.196 = 0.147 intelligencers

Partial pressure of water vapor/ partial pressure of nitrogen = intelligencers of water vapor/ intelligencers of nitrogen/(0.75 * 1) = intelligencers of water vapor/0.147

intelligencers of water vapor = 11.4 *0.147/0.75 = 2.2344 intelligencers of water = 2.2344 * 18 gm = 40.22 gm

viscosity of water = 1 g/ mL

Volume of water = 40.22/ 1 = 40.22 mL

When the person is in airplane:

Relative moisture = 10

Partial pressure of water vapor = 23.8 *0.1 = 2.38 mmHg /0.75  = intelligencers of water vapor/0.147

intelligencers of water vapor = 2.38 *0.147/0.75 = 0.47 intelligencers = 0.47 * 18 = 8.46 gm

Volume of water = 8.46/ 1 = 8.46 mL

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Answer:

divide then add XD my guy this is easy

Explanation:

The linear convolution is a mathematical operation that finds the output of the linear time-variant system that is given its impulse and linear time-invariant responses.

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Answer:

sandals, gloves, necklaces

Explanation:

sandals, gloves, necklaces

Answer:B

Explanation: Dead Grass more flammable than wood and Green grass contains water.