1. A 50 hp, 250 V, DC shunt motor with compensating windings has the following circuit parameters:
RA = 0.8 Ω Vt = 250
V RF = 280Ω IL,rated = 100 A
Radj 0 to 100Ω nrated = 1200 rpm

Plot the torque-speed characteristic of this motor if the resistor Radi is adjusted to 45 Ωby using MATLAB software. List the value of the line current, field current, armature current, armature voltage, speed and torque in the table.

a. The stress in the femur is calculated to be approximately 24.32 MPa.

b. The amount of shortening due to the load is calculated to be approximately 1.56 mm.

a. To calculate the stress in the femur, we need to determine the cross-sectional area of the femur and apply the formula: Stress = Force / Area. The cross-sectional area of the femur can be calculated as the difference between the areas of the outer and inner circles. The stress is then determined by dividing the applied load by the cross-sectional area.

b. To calculate the amount of shortening, we use Hooke's Law, which states that the amount of deformation is directly proportional to the applied force and the material's Young's modulus. The formula for calculating the amount of shortening is given by: Shortening = (Force * Length) / (Cross-sectional area * Young's modulus). By substituting the given values, we can determine the amount of shortening caused by the load.

Note: The given values (diameter, hollow center diameter, and length) are used to calculate the cross-sectional area and the total cross-sectional area of the femur. Young's modulus (Y) is also provided to calculate the amount of shortening.

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Answer:

Explanation:

Tech Social Media giant FB is one of those companies. Not long ago the ceo was brought to court to accusations that his company was selling user data. Turns out this is true and they are selling their users private data to companies all over the word. Once the news turned to something else, people focused on something new but the company still continues to sell it's users data the same as before. This is completely unethical as the information belongs to the user and they are not getting anything while the corporation is profiting.

Answer:

  40 ft

Explanation:

Assuming no loss of energy in the system of pulleys, the work done is the same whether you move the load directly or through the pulleys.

  W = Fd . . . . . . . . work is the product of force and distance

  F(10 ft) = (0.25F)(d) . . . . . where d is the distance we want to find

  d = 10F/(0.25F) = 40

The rope will need to move 40 feet.

The capacitance of a parallel-plate capacitor can be halved by doubling the plate separation. This is because the capacitance is inversely proportional to the plate separation.

A parallel-plate capacitor is a two-plate arrangement that can store an electric charge when an electric potential difference is applied across the plates. The capacitance of a parallel-plate capacitor is proportional to the plate area and inversely proportional to the distance between them.

According to the relation C = ε_0(A/d)

Where C is the capacitance, ε_0 is the permittivity of free space, A is the plate area and d is the distance between the plates.

Therefore, to halve the capacitance of the charged parallel-plate capacitor, we have to double the plate separation. This relation between capacitance and plate separation helps in understanding the effect of physical properties on the electric field between two parallel plates.

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Layering and terracing are similar design techniques that stack similar materials horizontally.

Layering is a high-frequency trading strategy in which traders place and then cancel orders they never intend to fill in hopes of affecting the stock price. For example, to buy a stock at a lower price, a trader first places a sell order at or below the market's ask price.

Layering may involve changing the type of assets such as Cash, gold, casino chips, real estate, etc. Complex layering schemes involve sending money around the world using a series of transactions.

Lamination, sometimes stacking, is the basic technique of placing sheets or other thin, flat materials on top of each other for visual effect. In this technique, the edges of the leaves get the most attention.

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Answer:

The purpose of Customs Duty is to protect each country's economy, residents, jobs, environment, etc., by controlling the flow of goods, especially restrictive and prohibited goods, into and out of the country.

Answer:

d

Explanation:

The ans is d, from the word mechanical dealing with machines

Answer:

int()

Explanation:

float() is using decimals, so that can't be it, like float(input( "how much does this cost?"))

print() is used to print something, not a user asking, like print("hello")

string() means like a whole, like string( I am good)

By elimination, int() is correct.

Hope this helps!

Answer:

Hence the given statement is false.

Explanation:

For low-speed subsonic wind tunnels, the air density remains nearly constant decreasing the cross-section area cause the flow to extend velocity, and reduce pressure. Similarly increasing the world cause to decrease and therefore the pressure to extend.

The speed within the test section is decided by the planning of the tunnel.  

Thus by adjusting the pressure difference won't change the worth of test section velocity.

Answer:

The given statement is false .

If diverse current-bearing conductors are integrated into a raceway, the ampacity of the conductors must be altered to accommodate the elevated amount of heat released due to their close contact.

The recalculation factor relies on the kind of raceway, the number of victuals, and the caliber of the victuals.

As an illustration, per the National Electrical Code (NEC), if five flow conductors inhabit a metal tube, the adjustment portion for 90°C rated cables is fifty percent. This implies that the ampacity of the lines ought to be multiplied by 0.5 or thinned out by half.

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Option B is incorrect as it applies to manual vehicles that have a clutch pedal. Option C is also incorrect as it applies to manual vehicles that have a gear lever but not an automatic vehicle.

The correct answer is B. Press the brake pedal and shift the gear lever. To change gears in an automatic vehicle, you need to first press the brake pedal and then shift the gear lever to the desired gear, such as from Park to Reverse or Drive. This is because the automatic transmission system is designed to prevent the car from moving without pressing the brake pedal. Unlike manual vehicles, there is no clutch pedal required to change gears in an automatic vehicle.

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She needs to seal and gather these empty bottles. At the scene of suspected arson at a home, Carolina has been ordered to gather a substrate. a carpet remnant that was manufactured in another country.

An arson scene's floorboards are free of any evidence of accelerants. What circumstances often result in an autopsy being conducted? When a death seems suspicious or unexplained, an autopsy is typically performed.

A section of clothing that is close to the crime stain and outside the region suggested by a presumptive test for a particular body fluid could be considered a substrate control; a positive result from a substrate control would not be anticipated.

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Leaching is used in industries to separate a metal from its ore using acid and preserving desirable products such as gold. Thus option C is the correct answer.

A material that quickly releases electrons to produce positive ions and has good electrical conductivity, luster, and flexibility is referred to as metal.

A chemical is extracted from a solid material that has made contact with a liquid during the leaching process. While certain chlorides are dissolved in sodium chloride solution, precious metals like gold are dissolved in cyanide solutions.

Therefore, option C separation of a metal from its ore using acid and preserving desirable products such as gold is the appropriate answer.

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To act as pilot in command of an airplane towing a glider, the tow pilot is required to have a valid pilot certificate with an airplane rating, at least a private pilot certificate, and a logbook endorsement from an authorized instructor certifying that the tow pilot is proficient in glider towing operations.

To act as pilot in command of an airplane towing a glider, the tow pilot is required to have a few things. First, they must have a valid pilot's license with the appropriate category and class ratings for the aircraft they are operating. In addition, they must have a minimum amount of flight experience and training specifically related to towing gliders.

According to Federal Aviation Administration (FAA) regulations, a tow pilot must have a minimum of 100 hours of flight time as pilot in command in the category and class of aircraft used for towing gliders. Of those 100 hours, at least 25 must have been completed in the past 12 months. Additionally, the tow pilot must have received ground and flight training specific to towing gliders, which includes the techniques and procedures for towing, releasing, and emergency procedures.

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Answer:

The main sections included in the bill of quantities are Form of Tender, Information, Requirements, Pricing schedule, Provisional sums, and Day works.

Coaxial cables are metallic cables that are most frequently used to link video equipment and convey television signals. They offer protection from electromagnetic interference, enabling the transmission of low-power communications over greater distances.

The keyboard, mouse, and touch screen are the three most used input methods.

The high bandwidth of an HFC and RFoG network is utilised to give broadband internet access via cable using cable modems.

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Answer:

Understand how the network works where she is working at

Explanation:

The Safety Data Sheets are designed to make it easier for employees to get health and safety information about chemicals (Option A). They are fundamental for handling hazardous chemicals.

Safety Data Sheets are pieces of useful information developed by a manufacturer of a hazardous chemical.

These sheets (safety data sheets) include different types of data including, among others, chemical properties; physical hazards, environmental hazards, etc.

Safety data sheets also include different measures for the safety and protection of overall health, which is often related to issues such as, for example, how to store and/or transport the target chemical.

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Place a metal paper clip on a table and slowly bring each electromagnet closer to the paper clip to see which can attract the paper clip from a greater distance.(option A)

What is an electromagnet?

A coil surrounding a magnetic core through which an electric current is delivered to magnetize the core is what makes up an electromagnet. Wherever controlled magnets are needed, such as in devices where the magnetic flux needs to be adjusted, reversed, or turned on and off, an electromagnet is utilized.

The magnetic field has also been thought to be completely contained inside the coil. In actuality, the magnetic lines of force that surround the exterior of the coil, which represent the leakage flux, are constantly present and do not add to the core's magnetization.

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The question was incomplete. Check below the full question.

Jaeda designs two electromagnets of different strengths. the first electromagnet has an insulated copper wire wrapped around an iron nail many times before it is connected to a battery. the second electromagnet has its insulated copper wire wrapped around a similar nail a fewer number of times before it is connected to two smaller batteries jaeda tries to determine which electromagnet is stronger by bringing each near a bowl containing eight metal paper clips. she observes that both electromagnets attract all eight of the paper clips how can jaeda demonstrate that each electromagnet has a different strength?

A. Place a metal paper clip on a table and slowly bring each electromagnet closer to the paper clip to see which can attract the paper clip from a greater distance.

B. Determine which electromagnet has its copper wire wrapped around its iron nail a greater number of times.

C. Add plastic paper clips to the bowl and check which electromagnet can attract both kinds of paper clips.

D. Reduce the number of paper clips in the bowl and find which electromagnet attracts more paper clips.

The given statement of "To fasten a duct hanger to a gypsum board wall, the best fastener would be an anchor shield" is false.

Anchor shields are typically used to secure objects to concrete or masonry walls.

For fastening a duct hanger to a gypsum board wall, the best fastener would be a toggle bolt or a self-drilling drywall screw. These fasteners are specifically designed for use in drywall and can provide a secure hold for the duct hanger.

Therefore, one can say that Anchor shields may not provide a secure hold in drywall, as they are designed for use in masonry or concrete.

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Ewilliam  will the Solution column contain when this code is executed. LOWER(LEFT(FirstName,1) + LEFT(LastName,7)) AS Solution.

Writing computer programming code is referred to as coding. The term "coding" is used more broadly to describe the process of classifying or categorizing anything. The main approach for enabling intercommunication between machines and humans is coding.

Punch cards and other like tools were used for early forms of coding.

Early programming languages like BASIC, FORTRAN, and COBOL, each with their own syntax and operations, were utilized when digital computers were developed.

In the era of personal computers and the Internet, programmers and developers often create code in modules that correspond to distinct computing jobs. These modules are assembled as part of a larger framework or undertaking, like a unique software application.

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Both technicians A and B are correct in their statements regarding too much valve lift.

Technician A is correct in saying that too much valve lift can cause less air to flow into the combustion chamber. This is because as the valve lifts higher, it restricts the airflow through the intake and exhaust ports. This can result in decreased performance and power output, as well as an increase in fuel consumption. Therefore, the valve lift needs to be optimized to ensure that the engine receives the optimal amount of air and fuel mixture.

Technician B is also correct in saying that too much valve lift can cause coil bind. This occurs when the spring is compressed to its maximum limit and cannot be compressed further, resulting in coil bind. This can cause engine damage, including broken valve springs and valve train failure. Therefore, the valve lift needs to be within the manufacturer's recommended limits to prevent coil bind from occurring.

In summary, both technicians A and B are correct in their statements regarding too much valve lift. It is important to find the optimal valve lift to ensure the engine receives the appropriate amount of air and fuel mixture and to prevent coil bind from occurring.

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Answer:

Sole Proprietorship, General Partnership , Limited Partnership, corporation

Explanation:

Business in something that an individual or a group of people do for a living and produce products and services that benefits the society and the people. There are several entities that can be common in business. Some common form of entities are :

Sole Proprietorship : One to one

-- here there is only one owner in the business and he maintains and manages the entire business functions under his control.

Limited Partnership : many to one

-- here two or more than two partners establish business and runs it but only one or more is liable to the amount of the investments.

General Partnership : many to many

-- It is a business partnership where all the partners shares the profits, the assets, legal liabilities and financial liabilities, etc.

Corporation : many to one

It is a business entity where a group of individual or a group of companies run a single business which is generally authorized by the state.

Some of the typical types of the entities that one may think to be common in term of the business entities are about the relationships that are held within many to many and one to many.

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Answer:

A fan/blower should be used

Explanation:

In a building the air pressure could be positive or negative and each if these depends on the air tightness of the building and could also be caused sometimes by wind and other factors.

When there is positive pressure, we have it that the pressure in the building is more than the outside pressure. Positive pressure also helps with an improvement in the quality of air in a building since it would take out smokes and other particulates.

Therefore to maintain positive pressure a fan or blower should be used.

It is false that an AC motor works by inducing current in the rotor with the help of the magnetic field created in the stator.

Thin electrical grade steel punched laminations, often known as "punchings," are used to construct the stator core. They are segmented, which means that one layer is made up of a 360° ring made up of 12 to 24 punchings arranged side by side. To ensure a strong body of combined punchings, each layer is "staggered" with respect to the positions of the gaps between punchings in the layers below and above.

Over 200,000 punchings might be found inside the stator core of a big turbine generator. To function as a solid mechanical body, these punchings are axially clamped. The axial clamping force is produced using one of two fundamental techniques. In one, "through bolts" are inserted through core yoke holes.

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The ASTM standard that governs the Jominy end-quench test is ASTM E140.

The ASTM standard that governs the Jominy end-quench test is E140. The Jominy end-quench test is a standardized test that is used to determine the hardenability of a steel alloy. This test measures the ability of a steel alloy to be hardened by a quenching process.The Jominy end-quench test involves heating a steel specimen to a specific temperature and then quenching it at one end. The rate of cooling is measured along the length of the specimen to determine the alloy's hardenability. The ASTM E140 standard specifies the standard practice for making Jominy end-quench test for the hardenability of steel.

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Both technicians are correct. In a turbocharger system, the impeller turns when the engine is running, compressing the air intake, while the turbine turns as exhaust gases pass through it, driving the impeller. They are referring to different parts of the same system.

Technician A says the impeller turns whenever the engine is running. Technician B says the turbine turns whenever the engine is running.The impeller turns when the engine is running, according to Technician A. Technician B says that the turbine turns when the engine is running. In a turbocharger, an impeller is located inside the compressor casing on one end of the shaft, while a turbine is located on the other end. These are attached by a shaft that runs through the turbocharger's center section.Air that is compressed by the compressor's impeller flows through the center housing to the turbine wheel when the turbocharger is working. The blades of the turbine wheel are moved by the exhaust gases that exit the engine and pass through the turbine wheel. As a result of the turbine's motion, the compressor wheel turns, compressing the air intake. Thus, both technicians are correct, but they are referring to distinct parts of the same system.

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