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\[ y[n]=x[n]-x[n-1] \] a) Determine and plot the impulse response of this system. Is this a stable system? Is it IIR? b) Determine the frequency response of this system. Calculate the magnitude and ph

Answer:

The volume percent of graphite is 91.906 per cent.

Explanation:

The volume percent of graphite (\(\% V_{Gr}\)) is determined by the following expression:

\(\%V_{Gr} = \frac{V_{Gr}}{V_{Gr}+V_{Fe}} \times 100\,\%\)

\(\%V_{Gr} = \frac{1}{1+\frac{V_{Gr}}{V_{Fe}} }\times 100\,\%\)

Where:

\(V_{Gr}\) - Volume occupied by the graphite phase, measured in cubic centimeters.

\(V_{Fe}\) - Volume occupied by the ferrite phase, measured in cubic centimeters.

The volume of each phase can be calculated in terms of its density and mass. That is:

\(V_{Gr} = \frac{m_{Gr}}{\rho_{Gr}}\)

\(V_{Fe} = \frac{m_{Fe}}{\rho_{Fe}}\)

Where:

\(m_{Gr}\), \(m_{Fe}\) - Masses of the graphite and ferrite phases, measured in grams.

\(\rho_{Gr}\), \(\rho_{Fe}\) - Densities of the graphite and ferrite phases, measured in grams per cubic centimeter.

Let substitute each volume in the definition of the volume percent of graphite:

\(\%V_{Gr} = \frac{1}{1 +\frac{\frac{m_{Gr}}{\rho_{Gr}} }{\frac{m_{Fe}}{\rho_{Fe}} } } \times 100\,\%\)

\(\%V_{Gr} = \frac{1}{1+\left(\frac{m_{Gr}}{m_{Fe}} \right)\cdot \left(\frac{\rho_{Fe}}{\rho_{Gr}} \right)}\times 100\,\%\)

Let suppose that 100 grams of cast iron are available, masses of each phase are now determined:

\(m_{Gr} = \frac{2.5}{100}\times (100\,g)\)

\(m_{Gr} = 2.5\,g\)

\(m_{Fe} = 100\,g - 2.5\,g\)

\(m_{Fe} = 97.5\,g\)

If \(m_{Gr} = 2.5\,g\), \(m_{Fe} = 97.5\,g\), \(\rho_{Fe} = 7.9\,\frac{g}{cm^{3}}\) and \(\rho_{Gr} = 2.3\,\frac{g}{cm^{3}}\), the volume percent of graphite is:

\(\%V_{Gr} = \frac{1}{1+\left(\frac{2.5\,gr}{97.5\,gr} \right)\cdot \left(\frac{7.9\,\frac{g}{cm^{3}} }{2.3\,\frac{g}{cm^{3}} } \right)} \times 100\,\%\)

\(\% V_{Gr} = 91.906\,\%\)

The volume percent of graphite is 91.906 per cent.

Among the given processes, the most wasteful process is material removal processes - like machining. Hence, the option (D) is correct.

Machining is a manufacturing process that includes a wide range of technologies for removing material from a workpiece to produce the desired shape and size. The workpiece is usually made of metal, but it can also be made of other materials, such as wood, plastic, or ceramic.

The aim of machining is to achieve a particular shape, size, or surface finish, or to remove material to achieve a particular tolerance or flatness. Material removal processes - like machining are the most wasteful because they remove a significant amount of material from the workpiece, resulting in a considerable amount of waste material. Therefore, material removal processes are considered the most wasteful among the given processes.

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Answer:

Explanation:

Power is the product of volts and amps:

  P = VI = (240 V)(34 A) = 8160 W = 8.16 kW

Energy is the product of power and time:

  (8.16 kW)(2 h) = 16.32 kWh

SQL can be used to access customer records in a database most relevant to the campaign.

SQL (Structured Query Language) is a standardized programming language that's used to manage relational databases and perform various operations on the data in them.

SQL can be used to access customer records in a database most relevant to the campaign.

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Answer:

The person above is totally correct.

Answer:

1.) 103.23 degree centigrade

2.) 126.96 degree centigrade

Explanation:

Given that a transparent film is to be bonded onto the top surface of a solid plate inside a heated chamber. For the bond to cure properly, a temperature of 70°C is to be maintained at the bond, between the film and the solid plate. The transparent film has a thickness of 1 mm and thermal conductivity of 0.05 W/m·K, while the solid plate is 13 mm thick and has a thermal conductivity of 1.2 W/m·K. Inside the heated chamber, the convection heat transfer coefficient is 70 W/m2·K. If the bottom surface of the solid plate is maintained at 52°C.

To determine the temperature inside the heated Chamber, let us first calculate the heat transfer rate per unit area through the plate by using the formula

Heat transfer rate R = k( Tb - T2)/L

Where

k = 1.2 W/mA.K

Tb = 70 degree

T2 = 52 degree

L = 13mm = 13/1000 = 0.013m

substitute all the parameters into the formula above.

R = 1.2 x ( 70 - 52 )/ 0.013

R = 1.2 x (18/0.013)

R = 1661. 5 W/m^2

the surface temperature of the transparent film will be

Ts = Tb + (RLf/Kf)

Ts = 70 + (1661.5 x 0.001)/0.05

Ts = 70 + (1.6615)/0.05

Ts = 70 + 33.23

Ts = 103.23 degree centigrade

the temperature inside the heated Chamber will be calculated by using the formula

Ti = Ts + (R/h)

Ti = 103.23 + (1661.5/70)

Ti = 103.23 + 23.74

Ti = 126.97 degree centigrade

For the function provided, (f- g)(x) would give C.-x²+4x- 4.

To calculate the function, we would first expand the values to have:

f(x) - g(x)

(4x + 1) - (x² - 5)

4x + 1 - x² -5

Collecting like terms would give us:

-x² + 4x -4

The option that is the same as the result of the function when expanded is option C. Thus option C is correct.

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Answer:

123456

Explanation:

The industry is using a lot of new replacement refrigerants, therefore a technician should rely on system temperatures to make troubleshooting easier, hence the given statement is true.

As opposed to conventional refrigerants like R-12 and R-22, new replacement refrigerants have unique features. As a result, the system temperatures will also vary. For instance, because R-134a has a lower boiling point than R-12, the evaporator temperature will be lowered.

A technician can more easily diagnose refrigeration problems by using system temperatures. They can make a comparison between the actual and anticipated temperatures for the particular refrigerant being utilized.

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The likely problem is the gasket was not thick enough. The correct option is B.

The space between two surfaces is sealed with a gasket, commonly referred to as an O-ring or washer. These objects often come in a variety of sizes and forms based on their intended use and are manufactured of rubber.

The flat gasket is the most typical kind of gasket. Its cross-section is shaped like a circle. The gasket was not thick enough to take over the leak, that's why the polymer slowly leaked from the joint.

Therefore, the correct option is B. The gasket was not thick enough.

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A computer program that enables communication between a computer and a hardware device is known as a device driver. A device driver is a specialized program that allows the operating system to interact with and control the hardware device.

Device drivers play a crucial role in modern computing, as they allow the computer to interact with a wide range of hardware devices, such as printers, scanners, keyboards, mice, and more. Device drivers are typically written by hardware manufacturers and are specific to the hardware device they control. A device driver acts as a translator between the hardware and the operating system, allowing the computer to send and receive data from the hardware device. Without device drivers, hardware devices would not be able to function correctly, and the computer would not be able to use them.

Device drivers are essential for maintaining the compatibility of hardware devices with different operating systems. As technology advances, new hardware devices are developed, and device drivers must be created to allow the computer to interact with them. Device drivers are also updated regularly to fix bugs, improve performance, and add new features. In summary, device drivers are programs that enable communication between a computer and a hardware device. They are essential for the proper functioning of hardware devices and are critical to maintaining compatibility between hardware devices and operating systems.

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Answer:

From electrical energy to radiation

Explanation:

A light bulb converts electrical energy to light, which is nothing more than radiation. Don't regard radiation as a bad thing, this light is non-iodizing radiation, which does not have the possibility to alter our DNA, and thus it's safe.

The simplest example can be found in old lights (obsolete now because they are vastly inefficient). This lights were just resistors which turned electrical energy into heat. A very hot material reflects light in the form of radiation, as described above.

Technologies like LEDs are more complicated to explain.

Answer:

2

Explanation:

Answer:

15x

Explanation:

Once tensioned, tensioning cables are held securely in a tensioned state by the use of anchor points and clamps.

Tensioning cables are a type of cable used in construction, engineering, and other industries to provide structural support or to transmit forces. Once tensioned, these cables are held securely in a tensioned state by the use of anchor points and clamps.

Anchor points are fixed points where the tensioning cable is attached and secured. They are typically embedded into a structure, such as a concrete wall or foundation, and provide a stable and secure point to anchor the cable. The anchor point must be strong enough to withstand the tension and forces exerted on the cable, which can be significant in some applications.

The anchor points are fixed points that the cable is attached to, and the clamps are used to secure the cable in place once it has been tensioned to the desired level. This ensures that the cable remains taut and does not become loose or slack over time, which could lead to structural issues or safety hazards.

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Answer:

See the attachment below

How to design injection molding mold?

Material Choice.

Selecting A Parting Line.

Adding Draft.

Avoiding Thick Areas.

Coring & Ribbing.

Uniform Wall Thickness.

Adding Radii.

Surface Finish.

Where the NEC does require listing, the equipment shall be installed and used in accordance with the listing and labeling conditions specified in the instructions included in the listing or labeling.

In accordance with the listing, equipment should be installed and utilized. A listing is a formal document that lists the criteria and requirements that equipment must meet in order to be deemed safe and functional. A listing implies that an independent third-party organization has tested and validated the equipment to be safe for use. The National Electrical Code (NEC) requires that specific electrical equipment be listed or certified by an independent testing laboratory to ensure that it is safe and suitable for the intended purpose.This ensures that the equipment is properly installed, maintained, and operated for safety and effectiveness.

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That statement is correct. The study of living primates provides valuable insights into our own behavior and evolutionary history.

By comparing the behavior, social structures, cognitive abilities, and communication systems of different primate species, researchers can gain a better understanding of human behavior and the factors that have shaped it. This comparative perspective allows us to explore the similarities and differences between humans and other primates, providing valuable insights into our own nature as social and intelligent beings.

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The net radiation heat transfer between the two plates per unit surface area of the plates with shield and without shied are respectively; 2282.76 W/m² and 9766.75 W/m²

We are given;

Temperature 1; T₁

Temperature 2; T₂

Temperature 3; T₃

Emissivity 1; ε₁ = 0.3

Emissivity 2; ε₂ = 0.7

Emissivity 3; ε₃ = 0.2

The net rate of radiation heat transfer with a thin aluminum shield per unit area of the plates with shield is;

Q'₁₂ = σ(T₁⁴ - T₂⁴)]/[((1/ε₁) + (1/ε₂) - 1) + ((1/ε₃,₁) + (1/ε₃,₂) - 1)]

Q'₁₂ = 5.67 * 10⁻⁸(900⁴ - 300⁴)/[((1/0.3) + (1/0.7) - 1) + ((1/0.15) + (1/0.15) - 1)]

Q'₁₂,shield = 2282.76 W/m²

The net rate of radiation heat transfer with a thin aluminum shield per unit area of the plates with no shield is;

Q'₁₂,no shield = σ(T₁⁴ - T₂⁴)]/((1/ε₁) + (1/ε₂) - 1))

Q'₁₂,no shield = 5.67 * 10⁻⁸(900⁴ - 300⁴)/[(1/0.3) + (1/0.7) - 1)]

Q'₁₂,no shield = 9766.75 W/m²

Then the ratio of radiation heat transfer for the two cases becomes;

Q'₁₂,shield/Q'₁₂,no shield = 2282.76/9766.75 = 0.2337 or 4/17

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Answer:

The answer is "Choice b,c, and d".

Explanation:

The distillation would be the separation phase of working liquids that boil close to each other. Whenever the formulation is long-term, a much more fraction of a compound collected will have a lower boiling point than it would otherwise be. In other phrases, it'll be pulverized with both the lower level, also with the boiling point. Its structure of both the diluted volatile component may therefore include another cell's contaminants.

Answer:

\(\t(x)_{max} =\dfrac{p\times L}{2\times \pi}\)

Explanation:

Given that

Shear modulus= G

Sectional area = A

Torsional load,

\(t(x) = p sin( \frac{2\pi}{ L} x)\)

For the maximum value of internal torque

\(\dfrac{dt(x)}{dx}=0\)

Therefore

\(\dfrac{dt(x)}{dx} = p cos( \frac{2\pi}{ L} x)\times \dfrac{2\pi}{L}\\ p cos( \frac{2\pi}{ L} x)\times \dfrac{2\pi}{L}=0\\cos( \frac{2\pi}{ L} x)=0\\ \dfrac{2\pi}{ L} x=\dfrac{\pi}{2}\\\\x=\dfrac{L}{4}\)

Thus the maximum internal torque will be at x= 0.25 L

\(t(x)_{max} = \int_{0}^{0.25L}p sin( \frac{2\pi}{ L} x)dx\\t(x)_{max} =\left [p\times \dfrac{-cos( \frac{2\pi}{ L} x)}{\frac{2\pi}{ L}} \right ]_0^{0.25L}\\t(x)_{max} =\dfrac{p\times L}{2\times \pi}\)

Answer:

  C. the object is moving forward

Explanation:

A positive slope means position is increasing when time is increasing. Generally, increasing position is "moving forward."

Answer:

C. The object is moving forward

Answer: Why is even here then.

Explanation:

The one that is not an option of the 3 technology bets made are  Digital core and Design Thinking.

The digital technologies made are known to be able to create value through the accelerating processes and also by automating them.

The technology bets Genpact are:

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The orientation of the strain gages would need to change if an axial load was applied to the rod. This is because the axial load will cause longitudinal strains in the rod, which are in a different direction than the strains caused by torsion.

The orientation of the strain gages at 45 degrees from the longitudinal member axis would still be valid for measuring strain caused by torsion even if an axial load is applied to the rod. This is because strain caused by axial loading is different from strain caused by torsion. The strain gages positioned at 45 degrees from the longitudinal member axis are only sensitive to strains in the principal tensile and compressive stress directions caused by torsion. Thus, they would not accurately measure the longitudinal strains caused by the axial load. To measure the longitudinal strains, strain gages would need to be positioned along the longitudinal axis of the rod.

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The family should accept a minimum of Kshs.42,250,000.00 to avoid incurring a loss.

To obtain the total cost, the expenses for the land, trees and upkeep are summed up and subsequently reduced by 6. 5% using a discount rate.

Hence, it can be seen that a forced acquisition appraisal primarily focuses on three key factors: the land's market value, the expenses involved in replacing the property, and the potential harm caused to the owner's belongings.

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Answer:

Engine oil level.

Brake fluid.

Power steering fluid.

Wall switch-controlled lighting outlets are required in all areas of commercial occupancies except for equipment rooms containing equipment that requires servicing.

In commercial occupancies, such as offices, retail stores, restaurants, and other similar establishments, wall switch-controlled lighting outlets are a standard requirement. These outlets allow users to control the lighting in a particular area by easily switching them on or off using a wall-mounted switch.

wall switch-controlled lighting outlets may not be mandatory. These equipment rooms are designed to provide a controlled environment for specialized equipment, such as electrical panels, HVAC systems, server rooms, or other sensitive machinery. The absence of wall switch-controlled lighting outlets in these rooms can enhance safety by reducing the risk of accidental disruptions or power interruptions during equipment maintenance or servicing.

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