Air enters a converging nozzle/diverging nozzle at a Mach number of 0.2. The inlet cross sectional area is 6 cm^2. Air flows isentropically through the duct. Assuming choked flow at the throat, what is the cross sectional area of the throat, in cm^2?

Answer:

  (√6)/3 ≈ 0.8165

Explanation:

The RMS value is the square root of the mean of the square of the waveform over one period. It will be ...

  \(\displaystyle\sqrt{\frac{1}{T}\left(\int_{\frac{T}{4}}^{\frac{3T}{4}}{1^2}\,dt+\int_{\frac{3t}{4}}^{\frac{5t}{4}}{(\frac{-4}{T}}(t-T))^2\,dt\right)}=\sqrt{\frac{1}{T}\left(\frac{T}{2}+\left.\frac{16}{T^2}\cdot\frac{1}{3}(t-T)^3\right|_{\frac{3t}{4}}^{\frac{5t}{4}}\right)}\\\\=\sqrt{\frac{1}{T}\left(\frac{T}{2}+\frac{T}{6}\right)}=\sqrt{\frac{2}{3}}=\boxed{\frac{\sqrt{6}}{3}\approx0.8165}\)

Answer: Breakdown Lanes

Reason: With breakdown lanes when a car needs to stop it can go to the backdown lane and fix its issue.

Ground shaking is a term used to describe the vibration of the ground during an earthquake. Ground shaking is caused by body waves and surface waves. As a generalization, the severity of ground shaking increases as magnitude increases and decreases as distance from the causative fault increases.

The Bairstow’s method to determine the roots of the given equations can be: (a) f(x) = -2 + 6.2x - 4\(x^2\) + 0.7\(x^3\):

coeff = [0.7, -4, 6.2, -2];

[r, ~] = bairstow(coeff);

roots = roots(r);

disp(roots);

coeff = [-3.704, 16.3, -21.97, 9.34];

[r, ~] = bairstow(coeff);

roots = roots(r);

disp(roots);

coeff = [5, -2, 6, -2, 1];

[r, ~] = bairstow(coeff);

roots = roots(r);

disp(roots);

Thus, each time, the code calculates the polynomial roots using MATLAB's bairstow function. The disp function is used to display the resulting roots.

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Technician A is correct. Disc brake pads should be replaced when worn to the minimum allowable thickness as stated by the vehicle's manufacturer.

This is to ensure that the brakes are performing safely and efficiently. When there is a brake performance complaint, the pads should still be inspected for any signs of wear and tear. The pads may need to be replaced if they have reached the minimum allowable thickness, but it is important to inspect them to ensure that there is no other underlying cause for the performance complaint. It is important to always adhere to the manufacturer's recommended guidelines for replacing brake pads, as this will ensure that your vehicle's brakes remain safe and efficient. Failing to do so can lead to decreased brake performance, and increased stopping distances, and can even lead to brake failure in some cases.

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The free version is fine and might be all you need, but I bought the in-app item since I felt the creator deserved to be compensated for creating such an attractively understated and useful software.

A Soft Murmur is a background noise generator that you may use online to unwind, concentrate, and block out distracting noises. Depending on the sound, background noise can either be comforting or annoying.

The official A Soft Murmur app from the corresponding website offers a dozen different calming sounds to provide background noise in every setting. Even better, you may mix the sounds in any way you choose to produce various moods.

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Answer:

yes answer d is correct

Communication Process are actions that create physical solutions to problems. The correct option is d.

Human existence and organisational survival both depend on effective communication. It is a process of generating and disseminating thoughts, facts, opinions, and sentiments from one place, individual, or group to another. The Management function of Directing depends on effective communication.

The sending party, message encoding, channel selection, message receipt by the recipient, and message decoding are all aspects of the communication process.

Feedback is when the recipient communicates something back to the original sender. These procedures are actions that result in tangible fixes for issues.

Thus, the correct option is d.

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The forces in members BC and FG of the loaded symmetrical truss can be determined by using one section and two equations, each of which contains only one of the two unknowns.

What is Force?
A force is an effect that can alter an object's motion according to physics. A force can cause an object with mass to accelerate when it changes its velocity, for as when it moves away from rest. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction. It is calculated using the newton SI unit (N). Force is denoted by the letter F. (formerly P).
The net force acting on an object is equal to the rate at which its momentum varies over time, according to Newton's second law in its original formulation.



The forces in members BC and FG of the loaded symmetrical truss can be determined by using one section and two equations, each of which contains only one of the two unknowns. By using the section, the force in member BC can be determined. By using the equation, the force in member FG can be determined.

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In this scenario, both Technician A and Technician B present potential causes for the issue of half of the dash being dark. Let's evaluate their statements:

Technician A suggests that a defective dash light dimmer can be the cause because it is in series with the bulbs that are in parallel. This means that if the dash light dimmer is not functioning properly, it can interrupt the electrical flow to all the bulbs connected in series with it. As a result, all the bulbs in that series would be affected, leading to the darkened half of the dash. Technician A's explanation is plausible.

Technician B suggests that one or more bulbs could be defective. If one or more bulbs in the dash are not functioning correctly, they can cause the darkened section. When bulbs fail, they create an interruption in the electrical circuit, preventing the flow of electricity and causing the affected bulbs to go dark. Technician B's explanation is also valid.

Considering both statements, it is difficult to determine with certainty which technician is correct without further investigation or testing. Both the defective dash light dimmer and one or more defective bulbs can result in the described symptom.

To diagnose the exact cause, an IT technician would need to inspect the dash light dimmer, check the electrical connections, and test the bulbs individually. By systematically examining these components, the technician can identify the specific cause of the darkened half of the dash and proceed with the appropriate repairs or replacements.

In conclusion, both Technician A and Technician B offer potential explanations for the issue, and further investigation is necessary to determine the exact cause of the problem.

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Option a is Correct. Numbers[numbers.length - 1] would be used to represent the array's final element.

The last element of the array would be at index numbers.length - 1 because arrays are typically indexed starting at 0. Numbers[numbers.length - 1] accesses the array's final element, which is the element at that index.

Because the length of an variable array is typically expressed as a property rather than a method in many programming languages (including Java), the expression numbers[numbers.length() - 1] is incorrect. In order to access it, numbers.length should be used instead of numbers.length ().

Numbers[numbers.length] and Numbers[numbers.length()] are also improper since they access an element outside the array's boundaries, which could lead to an error or unexpected behavior. The expression numbers are the last. length does not access any array elements; it only returns the length of the array.

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Correct Question:

Assume the variable numbers has been declared to be an array that has at least one element. Which is the following represents the last element in numbers?

a. numbers [ numbers.length – 1 ]

b. numbers [ numbers.length() – 1 ]

c. numbers [ numbers.length ]

d. numbers [ numbers.length() ]

e. numbers.length

It's important to note that this speed difference is only noticeable for large programs. For small programs, the difference is negligible.

1. Shortcut operators are faster than the conventional arithmetic operators: This statement is true. Shortcut operators are faster because they combine arithmetic operations with variable assignments in a single statement. For example, instead of writing "a = a + 2", you can write "a += 2". This saves time and reduces the amount of code you need to write. However, it's important to note that this speed difference is only noticeable for large programs or when dealing with complex calculations. For small programs, the difference is negligible.
2. You can declare more than one variable in a single line: This statement is also true. In many programming languages, you can declare and initialize multiple variables on the same line. For example, instead of writing "int a; int b; int c;", you can write "int a, b, c;". This saves space and makes your code more concise. However, it's important to note that you should only do this if the variables are related and have the same data type.
3. You must use else after every if statement: This statement is false. It's not necessary to use else after every if statement. You can use if statements on their own if you don't need to execute any code if the condition is not true. However, if you need to execute code in both cases (true and false), then you should use else. It's also important to note that you can use else if to test for additional conditions if the first if statement is not true.

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Answer:

The landscape architect uses knowledge of legal requirements to inform design choices.

Explanation:

The landscape architect doesn’t only draw on knowledge of law and government to design grounds for public buildings, but will draw on that knowledge quite often on many projects. The landscape architect’s knowledge of design is not purely intuitive but is a product of study and might involve research. The landscape architect’s knowledge of law and government, however, does come into play in making design choices that are consistent with the law and government regulations.

Answer:

it should be A bc I took the test a while back

The type(s) of building materials that tend to expand slightly after they are installed is option d. bricks.

Clay bricks start to expand or widen as soon as they come out of the kiln and continue to do so at a slower rate for a few years. Therefore, it is important to take into account the need for vertical and horizontal control joints in brick walls. Various brick types expand at different rates.

Note that Brick masonry is one that is often divided into sections by an expansion joint to prevent cracking brought on by temperature fluctuations, moisture expansion, elastic deformation, settlement, and creep. Expansion joints can be either vertical or one that is horizontal.

Therefore one can say that After installation, bricks elongate while concrete masonry units contract.

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Answer:

1

Explanation:

The usable heating or cooling delivered to work (energy) required ratio, also known as the coefficient of performance, or COP, of a heat pump, refrigerator, or air conditioning system.

Efficiency is always larger than 1, as T1 and T2 differences are typically smaller than T2's. Consequently, choice is the right response (A). We can  state that the COP of the refrigerator and air conditioner can be either less than or greater than one.

Therefore,  Higher efficiency, less energy (power) usage, and thus reduced operational costs are all related to higher COPs.

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Centrifugal force is the force exerted on an object moving in a circular path and directed outward from the center. In order to determine the centrifugal force in pound-force of a centrifuge carrying 50mL of blood, we will need to use the formula for centripetal force:

Centrifugal force = (mass x acceleration)/radius

Here's how to solve the problem:

First, we need to determine the mass of the blood being carried by the centrifuge. We know the volume of blood (50 mL) and the density of blood (0.994 g/mL), so we can use the formula:

mass = volume x density

mass = 50 mL x 0.994 g/mL

mass = 49.7 g

Next, we need to convert the given units to SI units (meters and seconds):

Centripetal acceleration = 64 ft/s^2
1 ft = 0.3048 m
Centripetal acceleration = 64 ft/s^2 x 0.3048 m/ft = 19.5072 m/s^2

Rotational speed = 345 rpm
1 rpm = 1/60 s
Rotational speed = 345 rpm x 1/60 s = 5.75 s^-1

Now we can use the formula to calculate centrifugal force:

Centrifugal force = (mass x acceleration)/radius

The radius of the centrifuge is half the diameter (3.5 inches or 0.0889 meters):

Centrifugal force = (49.7 g x 19.5072 m/s^2)/0.0889 m

Centrifugal force = 10,879.52 N

Finally, we need to convert Newtons to pound-force:

1 N = 0.22481 lb-f
Centrifugal force = 10,879.52 N x 0.22481 lb-f/N

Centrifugal force = 2,442.69 lb-f

Therefore, the centrifugal force in pound-force is 2,442.69 lb-f.

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The law that shows that the two propositions are logically equivalent is a. De Morgan's law.

De Morgan's law states that the negation of a conjunction is logically equivalent to the disjunction of the negations of the individual propositions, and vice versa.

In other words, ¬(A Ʌ B) is logically equivalent to ¬A v ¬B, and ¬(A v B) is logically equivalent to ¬A Ʌ ¬B. In this case, the original proposition is a negation of a conjunction, and the second proposition is a disjunction of the negations of the individual propositions.

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Answer:

Look at the load capacity chart in the cab

Explanation:

A crane can be defined as a large, tall metallic machine or equipment that is designed with a long horizontal arm (jib) used for the lifting and movement of very heavy objects through the air. They're usually designed to be operated by a human operator, who typically uses a remote controller and a beam to control the direction of movement of the crane.

Due to the fact that cranes are used for lifting and moving very heavy objects, they are powered by an internal combustion engine and electric motors.

Furthermore, all cranes have the maximum capacity of load they're able to lift at a particular point in time. In order to determine the rated or gross capacity of a crane and maintain safe operation, it is important to check its load capacity chart. The actual load a crane can lift is its net capacity and it must not be exceeded at any time, so as to avoid structural failure or overturning of the crane.

Hence, the best way to find the load capacity of a crane is to look at the load capacity chart in the cab.

The load can include rigging components, hooks, blocks, and other lifting equipment that is considered part of the load. The maximum load capacity of the crane is about 18 metric tons.

Hence the option C look at the chart is correct.

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a) The employed statistical technique employed in this situation is known as "sampling",

The agency dedicatedly selected an exemplary sample of 75 industries out of a complete population of 500, to gain cognizance into the yearly sales distribution of the entire group.

This procured data was afterwards consolidated into a tabular form with a proclivity for representing it visually through a graph; an expanding practice habitually utilized for displaying figures.

b) The analysis conducted here relies upon a calculative method called "estimation".

By calculating the average annul turnover of the specifically pinpointed seventy-five industries, the office created an assessment of the per annum sales of the full store of 500 cottage industries.

This implementation would be referred to as "statistical inference"; it involves using data from a segment to make determinations or prophecies concerning a larger populous. The exactness of the judgement depends on how well the sample exemplifies the merchandise and its respective variability within the figures.

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The purpose of the control rods in a nuclear power plant are to regulate the rate of the nuclear reaction that is taking place in the reactor core of the nuclear power plant, and to stop the nuclear reaction in the event of an emergency.

In nuclear power plants, control rods are an essential component that help to control the rate of the nuclear reaction and prevent a nuclear meltdown.

Control rods are made of materials like boron or cadmium that are capable of absorbing neutrons.

When the control rods are inserted into the reactor core, they absorb neutrons and slow down the nuclear reaction.

When they are removed, the nuclear reaction speeds up again.

This makes them a crucial tool for regulating the output of a nuclear power plant.

Control rods also play an important role in safety, as they can be used to quickly stop the nuclear reaction in the event of an emergency.

If something goes wrong with the reactor, the control rods can be fully inserted into the core to stop the nuclear reaction from continuing.

This can help to prevent a meltdown and protect the safety of people living near the nuclear power plant.

In conclusion, control rods are a vital component in a nuclear power plant, as they help to regulate the rate of the nuclear reaction and can quickly stop the reaction in the event of an emergency.

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Technician a says kinetic friction changes kinetic energy into thermal energy. technician b says static friction holds the car in place when it is stopped. Both A and B are correct.

In static friction, there is found to be some frictional force that tends to resists force that is known to be applied to an object, and the object will be at the same sport at rest until the force of static friction is known to be overcome.

In kinetic friction, the frictional force is one that tend to resists the movement of an object.

Therefore, Technician a says kinetic friction changes kinetic energy into thermal energy and technician b says static friction holds the car in place when it is stopped. Both A and B are correct.

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Answer:

True

Explanation:

It's just because of the processing

Answer:

Explanation:

You want to know the deflection of the trace on an oscilloscope set to 5 V/div when it is connected to a 15 V DC power supply, both when the 'scope is set to DC input coupling, and when it is set to AC input coupling.

When the input coupling is DC, the input voltage difference from ground (or the reference level) will deflect the oscilloscope trace according to its sensitivity setting.

  15 V/(5 V/div) = 3 div

The trace will be deflected 3 divisions.

The oscilloscope will register any AC content that is within its bandwidth when the input coupling is set to AC. A good DC power supply will have no AC content, so the deflection of the trace will be zero, 0 divisions.

__

Additional comment

The trace may be deflected briefly, then settle back to zero, when a DC power supply is connected to a 'scope set for AC input. The act of connecting the supply provides a step-function input to the 'scope, which has an AC content. The duration of the deflection will depend on the time constant of the input circuit.

Answer:

To run. The machine one at a time

Explanation:

The plant engineer should be willing to pay a maximum price of $30.89 per bulb to switch to the new bulb and still achieve a 15% MARR considering the given costs, labor, and operating hours.

To determine the maximum price per bulb the plant engineer should be willing to pay to switch to the new bulb, we need to compare the costs of using the current bulb versus the new bulb over their respective lifetimes.

Let's start with the current bulb:

- Cost per bulb: $45.90

- Lifetime: 14,600 hours

- Labor cost to change a bulb: $16.00

- Annual operating hours: 19 hours/day * 365 days/year = 6,935 hours/year

To calculate the total cost of using the current bulb over its lifetime, we need to consider the cost of bulbs and the labor cost for replacements:

Total cost = (Cost per bulb + Labor cost per replacement) * (Total replacements over the lifetime)

Total cost = ($45.90 + $16.00) * (14,600 hours / 6,935 hours/year)

Total cost = $61.90 * 2.103 ≈ $130.11

Now let's consider the new bulb:

- Cost per bulb: $60.00

- Lifetime: 2 * 14,600 hours = 29,200 hours

The maximum price per bulb the engineer should be willing to pay for the new bulb is the price at which the total cost of using the new bulb equals the total cost of using the current bulb:

Maximum price per bulb = Total cost of using the current bulb / (Lifetime of the new bulb / Annual operating hours)

Maximum price per bulb = $130.11 / (29,200 hours / 6,935 hours/year)

Maximum price per bulb = $130.11 / 4.211 ≈ $30.89

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The calculated load for eleven 120-volt duplex receptacles that are not subject to the 80% load limitation and are not continuous load is 18.15 amperes.

What is a duplex receptacle?A duplex receptacle is a term that refers to a double outlet that is capable of accepting two plugs simultaneously. Furthermore, each duplex receptacle has two receptacles (outlets) and is connected to a single electrical box.

How to determine the calculated load?In order to determine the calculated load, the following formula is used:W = VA or P = VIWhere:W stands for wattsVA stands for volt-amperesP stands for powerV stands for voltageI stands for currentWhat is the formula to determine the current (amperes)?The formula to determine the current is:I = P / V, where I stands for current, P for power, and V for voltage.Now let's calculate the load for eleven 120-volt duplex receptacles:W = VA = 11 duplex x 180 volt-amperes per duplex = 1,980 volt-amperes (VA)P = VI = 1,980 VA ÷ 120 volts = 16.5 amperes According to this, the calculated load for eleven 120-volt duplex receptacles is 16.5 amperes.

However, since the receptacles are not subject to the 80% load limitation, the amperage should be multiplied by 100% / 80%, which is equal to 1.25.16.5 amperes × 1.25 = 20.625 amperes However, since the receptacles are not subject to continuous loading, we may add another 25% to the amperage.20.625 amperes × 1.25 = 25.78 amperes or18.15 amperes (rounded to the nearest one-hundredth of an ampere).

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Answer:

when car vroom it go electric

Explanation:

i think then it goes to some spinny thing that spins and make the electric and the electic spins the spinny thing and the smoke comes outside the back