why carbon is not used as a semiconductor material​

Answer:

I'm good at drawing and computer-animated design

Explanation:

The steps that can be followed to create a Work Breakdown Structure (WBS) for the given scope.

1. Identify the main deliverables:

- Three bedrooms

- Two and a half bathrooms

- Pool

- Two patios, including one enclosed patio

2. Break down each deliverable into smaller, manageable tasks:

- Bedrooms:

- Design and plan

- Foundation and framing

- Electrical and plumbing

- Drywall and insulation

- Painting and finishing touches

- Bathrooms:

- Design and plan

- Foundation and framing

- Electrical and plumbing

- Drywall and insulation

- Installation of fixtures and accessories

- Pool:

- Design and plan

- Excavation and installation of pool shell

- Installation of filtration system

- Electrical and plumbing

- Filling with water and testing

- Patios:

- Design and plan

- Foundation and framing

- Electrical and plumbing

- Installation of flooring and finishing touches

- Enclosing one of the patios:

- Design and plan

- Framing and installation of walls and windows

- Electrical and plumbing

- Installation of flooring and finishing touches

3. Identify dependencies and relationships between tasks:

- The design and planning of each deliverable will need to be completed before any construction work can begin.

- Electrical and plumbing work will need to be completed before drywall and insulation work can begin.

- Flooring and finishing touches should be completed after the installation of fixtures and accessories.

4. Create a hierarchical structure with the main deliverables at the top level, and the smaller tasks beneath them.

5. Assign timeframes and resources to each task, and estimate the overall project duration.

Note: This is just an example of how to create a WBS for the given scope. The actual WBS may vary depending on the specific requirements of the project and the preferences of the project team.

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A toddler who can recognize herself in a mirror is more likely to be confident in her daycare class. Explanation: A toddler who can recognize herself in a mirror is more likely to be confident in her daycare class.

It shows that she is developing a sense of self-awareness and is more aware of her place in the world. This can lead to increased confidence and self-esteem, which can translate to better social skills and interactions with others in her daycare class.

In addition, the ability to recognize oneself in a mirror is an important developmental milestone that typically occurs around 18-24 months of age. This is an important sign of healthy cognitive and social-emotional development, and can have a positive impact on the child's overall well-being.

Overall, the ability to recognize oneself in a mirror is an important aspect of a toddler's development, and can have positive implications for their social, emotional, and cognitive growth.

It is a sign of increasing self-awareness and confidence, and can help children develop healthy relationships with others in their daycare class.

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Explanation:

To address the requirements for the upgraded Linux system, you will need a minimum of at least 200GB + 100 users * 5GB = 800GB of hard disk space. This will ensure that the database application and associated data, as well as the personal files of the 100 users, can be stored on the system.

In terms of partitions, you will need to create a new partition for the database application and data. This partition should be at least 200GB and should be mounted to a directory such as /data. You will also need to create a partition for the personal files of the users. This partition should be at least 100 users * 5GB = 500GB and should be mounted to a directory such as /home.

Quotas should be implemented on the /home partition to ensure that each user only has a maximum of 5GB of storage space. You can use the quotactl system call or the quota utilities (quotaon, edquota, repquota, etc.) to implement quotas.

To ensure that the system does not exhibit downtime as a result of hard disk errors, you may consider using a redundant array of inexpensive disks (RAID) to provide data protection. A RAID 1 or RAID 10 configuration can be used to mirror the data, so that if one disk fails, the data is still available on another disk.

To implement the new partitions and quotas, the following commands could be used:

To create the new partitions:

fdisk /dev/sda (or other device name)

n (create new partition)

p (primary partition)

1 (partition number)

[Enter] (default first cylinder)

+200G (size of partition for database application and data)

n (create new partition)

p (primary partition)

2 (partition number)

[Enter] (default first cylinder)

+500G (size of partition for user personal files)

w (write changes and exit)

To format the new partitions:

mkfs.ext4 /dev/sda1 (for the database application and data partition)

mkfs.ext4 /dev/sda2 (for the user personal files partition)

To mount the new partitions:

mkdir /data

mount /dev/sda1 /data

mkdir /home

mount /dev/sda2 /home

To implement quotas:

quotacheck -avugm (to check the file system for quotas)

edquota -u [username] (to edit the quota for a specific user)

quotaon /home (to enable quotas on the /home partition)

To add the new partitions to /etc/fstab:

Add the following lines to the file:

/dev/sda1 /data ext4 defaults 0 0

/dev/sda2 /home ext4 defaults,usrquota 0 0

In conclusion, to ensure that the system will perform as needed, you will require at least 800GB of hard disk space, and create two partitions for the database application and data, and user personal files, with quotas implemented on the user personal files partition. The new partitions should be mounted to /data and /home, and entries should be added to the /etc/fstab file to ensure that they are automatically mounted during system boot.

The exclusion of some traditional partners from the "democratic camp" by the United States will undoubtedly deepen the gap between the two sides.

About summit :

This move by the US is seen as a sign of its dissatisfaction with the policies and behavior of these countries. In addition, the invitation of some countries or regions suspected of "democratic retrogression" may lead to further erosion of the credibility of the summit in the eyes of the invited countries, as well as the international community. At the same time, it is worth noting that the United States must consider the consequences of such actions and the possible damage to its international image. If the US is seen as selectively choosing partners, it may undermine its overall influence in the world.

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Answer:

Utilizing flush valves for toilets and urinals and/or low-flow versions of each, as well as installing low-flow faucets, or aerators can significantly reduce water use.

Explanation:

A specimen having a diameter of 6.4 mm and a gauge length of 25.4 mm is being tested. The stress–strain curve produced by the test is shown in Figure 4-16.

Compute the modulus of elasticity and the yield strength of the material. Answer using units of GPa for E and MPa for σy. Figure 4-16 Stress–strain curve for the tensile testing of a brass specimen.The specimen specified in Example 4-4 is tested on a machine of 20-kN capacity, Recording is made from the crosshead of the machine.

Would you expect the initial slope of the recording to be steeper for the smaller machine?The slope of the graph will not be affected by the capacity of the machine on which the specimen is tested because it is based on the properties of the material being tested.

The slope of the graph is determined by the modulus of elasticity of the material, which is a fundamental property of the material.

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Answer:

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Solution :

It is given that :

Thermal coefficient = 0.0045/K

Ambient temperature, \($T_a = 25 - 40^\circ$\)

air velocity, v = 0-5 m/s

Solar radiation, \($G= 400-100 \ W/m^2$\)

\($P=50 \ W$\)

Model calculations :

Cell temperature (\($T_c$\))

\($T_c = T_a + \left(\frac{0.25}{5.7+3.8 \ v_w}\right) G$\)

where \($ v_w - v_a = $\) wind speed / air speed

∴ \($T_c = 2 \pi + \left(\frac{0.25}{5.7+3.8 \times 1}\right) \times 400$\)

   \($T_c = 35.526 ^\circ$\)

\($\Delta T = T_c -25$\)

      = 35.526 - 25

      = 10.526 K

Thermal coefficient = 0.0045 x 10.526

                                = 0.04737

Pv power = \($(1 -C_T) \times P \times \frac{G}{1000}$\)

                \($=(1 -0.04737) \times 50 \times \frac{400}{1000}$\)

                = 17.0526 W

Technician B is incorrect, and Technician A is also likely incorrect.

Technician A's statement about using two diodes for each stator winding lead is unclear without additional context about the specific system being discussed.

In general, a diode can be used to rectify AC voltage into DC voltage, but it is not always necessary to use two diodes. Some rectifiers use a single diode, while others use multiple diodes in a configuration called a bridge rectifier.

Technician B's statement is incorrect. Diodes can be used to rectify AC voltage, but they do not change AC into DC. Instead, they allow the positive portion of the AC voltage to pass through while blocking the negative portion, resulting in a DC voltage with a pulsating waveform.

In summary, both technicians' statements are either unclear or incorrect.

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Answer:

Explanation:

In this geometry, the force in each string is proportional to the cosine of the angle the opposite string makes with the horizontal, and is inversely proportional to the sine of the sum of the angles.

  AC = (15 N)cos(45°)/sin(60° +45°) = (15 N)cos(45°)/sin(105°) ≈ 10.98 N

  BC = (15 N)cos(60°)/sin(105°) ≈ 7.76 N

_____

The relation described above derives from the fact that the sum of vertical forces and the sum of horizontal forces are both zero when the system is in equilibrium.

Answer:

Explanation:

Understanding the business is important when designing a database because it enables the designer to align the database structure with the specific needs and requirements of the business. By comprehending the business processes, workflows, and data dependencies, the designer can create a database schema that accurately represents the real-world entities, relationships, and business rules. This alignment ensures that the database effectively supports the operations and goals of the business, leading to improved efficiency and productivity.

Furthermore, understanding the business helps in identifying and prioritizing the data to be stored in the database. By understanding the key information needed for decision-making and analysis, the designer can determine the essential data elements that should be included in the database. This ensures that the database captures and retains the critical information required by the business, facilitating accurate reporting, data analysis, and informed decision-making.

In summary, understanding the business is crucial for designing a database that is well-suited to the specific needs and requirements of the enterprise. It enables the designer to align the database structure with the business processes and data dependencies, and it helps in identifying and prioritizing the essential data to be stored. Ultimately, this understanding ensures that the database effectively supports the operations and goals of the business, contributing to its overall success.

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Answer:

Explanation:

It appears that you are trying to solve a problem involving an insulated rigid tank containing saturated liquid water and water vapor. To determine the volume of the tank, you will need to know the mass of the liquid water and the mass of the water vapor. The mass of the liquid water can be calculated by multiplying the mass of the water and vapor mixture by the fraction of the mixture that is liquid water (1.4 kg * 0.25 = 0.35 kg). The mass of the water vapor can be calculated by subtracting the mass of the liquid water from the total mass of the mixture (1.4 kg - 0.35 kg = 1.05 kg).

To determine the final temperature of the tank, you will need to know the amount of heat added to the tank by the electric resistor and the specific heat capacity of the water and water vapor mixture. The specific heat capacity is a measure of the amount of heat required to raise the temperature of a substance by a certain amount. The specific heat capacity of water is 4.186 J/g°C, and the specific heat capacity of water vapor is 2.080 J/g°C.

To determine the electric power rating of the resistor, you will need to know the amount of heat added to the tank by the resistor and the time over which the heat was added. The power rating of the resistor is equal to the amount of heat added to the tank divided by the time over which the heat was added.

I hope this helps clarify the problem and provide some guidance on how to solve it. If you have any further questions or need additional help, please don't hesitate to ask.

The term "remodel" implies making changes to the existing design rather than starting from scratch.

An optimized sintered wick heat pipe is a type of heat pipe that utilizes a sintered wick structure to enhance heat transfer. The sintered wick is typically made of porous metal or ceramic materials that promote capillary action and efficient fluid transport within the heat pipe.When remodeling the existing design, various aspects can be considered. This may involve modifying the dimensions, materials, or geometry of the heat pipe to enhance its performance.

The goal could be to improve heat transfer efficiency, increase thermal conductivity, reduce pressure drops, enhance durability, or optimize the heat pipe for specific operating conditions or applications.Remodeling the design may involve computational modeling, simulation, prototyping, and experimental testing to evaluate the performance and validate the modifications. The aim is to achieve an improved or tailored design that better meets the desired performance objectives.

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The torque present in output shaft : 2034.51 Nm

To calculate the output torque, we need to use the formula:
Output torque = (Input torque * Driven gear teeth) / (Driving gear teeth * Countershaft gear teeth)
Putting in the given values:
Output torque =\((1000 ft-lb * 60 teeth) / (24 teeth * 45 teeth)\)
Output torque = 1500 ft-lb
Converting this to Newton-meters:
Output torque = 2034.51 Nm
Therefore, the torque present at the output shaft is 2034.51 Nm when an input gear with 24 teeth is driving a countershaft driven gear with 48 teeth, and a countershaft second gear with 45 teeth is driving a main shaft gear with 60 teeth. This is the amount of force that is available to rotate the output shaft.

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When using a raising stake to form a deep bowl,  start the raising operation using forming blocks. Option A

These blocks give bolster and shape to the metal because it is slowly pounded over the stake.

Strengthening operations, in spite of the fact that not particularly specified, are still pivotal amid the raising handle, indeed in the event that hardwood stakes are utilized (B).

Toughening makes a difference to relax the metal and anticipate breaking or mutilation. As the edges of the piece are raised, a hammer is utilized to shape and form the metal, requiring the piece to be picked up different times (C).

At last, after trimming any overabundance fabric, the shaped piece is  cleaned for a smooth and refined wrap up (D).

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The PVC is located at station 30+20.55 and has an elevation of 752.67 ft, while the PVT is located at station 30+60.55 and also has an elevation of 752.67 ft.

What is PVC?

Point of Vertical Curvature is referred to as PVC. The point on a vertical curve where the road slope switches from uphill to downhill or vice versa is known as the "turnaround point." The PVC is where the road's curve switches from convex to concave, or the other way around. On a sag curve, the PVC is the highest point, and on a crest curve, the lowest. Because it has an impact on the visibility and safety of the road, it is crucial in the design of highways and civil engineering.

First, we need to find the elevations of the two grades at station 30+60.55. We can use the following equation to do this:

Elevation = Elevation of Intersection Point + (Grade × Distance)

For the 5 grade:

Elevation = 748.64 + (0.05 × 60.55) = 751.67 ft

For the 3 grade:

Elevation = 748.64 + (0.03 × 60.55) = 750.83 ft

Since the elevation of the 5 grade is higher than the elevation of the 3 grade at the intersection point, this is a sag curve.

To find the location and elevation of the PVC and PVT, we can use the following equations:

PVC Elevation = Elevation of Intersection Point + (Grade Difference/100) × (Distance/2)²

PVT Elevation = Elevation of Intersection Point + (Grade Difference/100) × (Distance/2)²

PVC Station = Intersection Station – (Distance/2)

PVT Station = Intersection Station + (Distance/2)

Where:

Grade Difference = 0.05 - 0.03 = 0.02

Distance = 800 ft

PVC Elevation = 751.67 + (0.02/100) × (800/2)² = 752.67 ft

PVT Elevation = 751.67 + (0.02/100) × (800/2)² = 752.67 ft

PVC Station = 30+60.55-(800/2) = 30+20.55 = 30+20+0.55 = 30+20.55

PVT Station = 30+60.55+(800/2) = 30+60+0.55 = 30+60.55

Therefore, the PVC is located at station 30+20.55 and has an elevation of 752.67 ft, while the PVT is located at station 30+60.55 and also has an elevation of 752.67 ft.

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Let's solve this question using the ideal gas law:P1V1/T1 = P2V2/T2We know that the first propane tank has a volume of 1 m3 and is at 150 kPa and 300 K.

Therefore:P1 = 150 kPaV1 = 1 m3T1 = 300 KThe second propane tank has a volume of 0.5 m3 and is at 250 kPa and 380 K. Therefore:P2 = 250 kPaV2 = 0.5 m3T2 = 380 KWe want to find the final pressure when the two tanks are connected and reach a uniform state at 320 K. Let's call this final pressure Pf.

We can rewrite the ideal gas law as:P2 = (P1V1T2)/(V2T1)Now we can substitute in our values:Pf = (150 kPa * 1 m3 * 320 K)/(0.5 m3 * 300 K)Pf = 320 kPaTherefore, the final pressure is 320 kPa.Answer: The final pressure is 320 kPa.

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Answer:

The total load carried by the fiber will be "98%".

Explanation:

The given values are:

\(V_{f}=0.61\)

\(V_{m}=1-V_{f}\)

     \(=1-0.61\)

     \(=0.39\)

\(E_{f}=10 \ Mpa\)

\(\sigma_{f}=0.35 \ Mpa\)

\(E_{m}=0.45 \ Mpa\) , \(\sigma_{m}=9\times 10^{-3} \ Mpa\)

As we know,

⇒  \(E_{e}=fE_{f}+mE_{m}\)

On putting the estimated values, we get

⇒       \(=0.61\times 10+0.39\times 0.95\)

⇒       \(=6.27 \ Mpa\)

Now,

⇒  \(\sigma_{c}=f\sigma_{f}+m\sigma_{m}\)

On putting the estimated values, we get

⇒       \(=0.61\times 0.35+0.39\times 0.009\)

⇒       \(=0.217 \ Mpa\)

Therefore,

The load carried by fiber,

\(=\frac{f\sigma_{f}}{\sigma_{c}}\)

\(=\frac{0.35\times 0.61}{0.217}\)

\(=0.98\) i.e., 98%

Answer: the answer is in the photo

Explanation:

The true power is obtained as 70.7 VA.

We define the power a the rate of doing work, we know that the power in a circuit is the product of the current and the voltage. In this case, we want to find the true power thus we have to involve the use of the phase shift in degrees.

Thus;

True power = PcosΦ

P =  100 VA

Φ = 45 degrees

True power =  100 VA * cos 45 degrees

True power = 70.7 VA

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The insert mode is used to type new text into the file in linux system.

In vi, there are three modes of operation:

The complete question:

"You're using the vi editor to manage a text file on a Linux system. You want to type new text into the file; when you type you want the existing text that comes after the cursor to be pushed down?

What mode do you need to be in to do this?"

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Answer:

A

Explanation:

Answer:d

Explanation:

Answer:

The Answer is actually C

Explanation:

Look up the definition

We need to use the formula for Voltage Divider which is:Vout = Vin x R2 / (R1 + R2)Using the above-given formula, we can calculate the value of the voltage drop across R1:Vout = 12 x (2 / (1.5 + 2))Vout = 12 x (2 / 3.5)Vout = 6.86 voltsThis means the voltage drop across R2 is 6.86 volts.

Voltage Divider Formula:

A Voltage Divider Circuit is a very common circuit that takes a higher voltage and converts it to a lower one by using a pair of resistors. The formula for calculating the output voltage is based on Ohms Law and is shown below. Vout = Vin * R2 / (R1 + R2)Where:

Vin is the input voltage,R1 is the resistance of the 1st resistor,R2 is the resistance of the 2nd resistor, Vout is the output voltage.

Now, let's calculate the value of voltage drop V1 across R1 using Voltage Divider Formula. Given the following values, Voltage supply Vt = 12VResistance R1 = 1.5 ΩResistance R2 = 2 ΩWe need to use the Voltage Divider Formula to calculate the voltage drop across R1.

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The question is missing some important details but I will guide you on how to solve for normal stress

The point in the beam has got a normal stress (σ) which can be calculated by taking the ratio of the bending moment (M) and section modulus (S):

σ = M/S

To ascertain the section modulus of a rectangular cross-section, the following equation is employed:

S = (b * h^2) / 6

In answer to the supplicated inquiry, within this example, b stands for the width of the beam (6 in), and h represents the height of the beam (8 in). Hence, by accounting for these dimensions, S can be calculated.

The effect of a uniformly distributed load (q) on an elicited bending moment (M) can be determined through utilization of the pertinent beam equations, that can be derived once the location of point C, as well as the length of the demonstrated beam is known.

Having notably acknowledged M and S, it is possible to estimate the normal stress (σ) at point C.

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