Air at 290 K, 100 kPa enters a compressor operating at steady state and is compressed adiabatically to an exit state of 420 K, 330 kPa. The air is modeled as an ideal gas, and kinetic and potential energy effects are negligible. For the compressor:


a. Determine the rate of entropy production, in kJ/K per kg of air flowing

b. The isentropic compressor efficiency.

Answer:

21.6 kw

Explanation:

Given data:

m = 50 kg/s

Inlet pressure (p1) = 2 bar

outlet pressure(p2) = 6.2 bar

suction ( h1 ) = -2.2 m

delivery ( h2 ) = 8.5 m

d1 = 200 mm = 0.2 m

d2 = 100 mm = 0.1 m

Vs of water = 0.001 m^3/kg

next we have to determine the Q value

Q = V*A

Q = 0.001 * 50 = 0.05 m^3/s

next we have to calculate the various V's

V1 = Q/A1 = \(\frac{0.05*4}{\pi *0.2^2}\)  = 1.59 m/s

V2 = Q/A2 = \(\frac{0.05*4}{\pi *0.1^2}\) = 6.37 m/s

Determine the capacity of the electric motor

attached below is the detailed solution

Answer:

FOLLOWED BY...  2 6 5 3 5 8 9

UwU

Microsoft Edge is a web browser developed by Microsoft, which has gained popularity for its unique feature that allows users to annotate webpages.

This feature is called "Web Notes," and it allows users to add notes, highlight text, and draw on webpages using a stylus or finger on a touch-enabled device or a mouse on a non-touch device.The Web Notes feature is particularly useful for people who need to conduct research, take notes, or collaborate with others on webpages.

It allows users to mark up and share web content easily, without having to switch to other tools or applications. For example, a student researching a topic can highlight key information and add notes directly on the webpage, then share the annotated page with a classmate or professor.

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The hot iron's initial temperature is 157545°C.

What is iron?

Iron has the atomic number 26 and the chemical symbol Fe. It is a metal from the first transition series and group 8 of the periodic table.

Given mass of the iron mi = 400 kg

Specific heat capacity of iron Ci; = 0.04 Jkg⁻¹k⁻¹

Mass of water Mw = 30 kg

Specific heat capacity of water C w = 4200 Jkg⁻¹ k⁻¹

Temperature of water Tw = 10°c

Mass of Calorimeter Mc = 120 kg

Specific heat capacity of Calorimeter Cc = 0.1 Jkg⁻¹K⁻¹

Final temperature of the mixture of T f = 30°c

Let Ti be the initial temperature of the iron.

We know that, heat lost and heat gained will be equal.

So,

Mc Cc ( T f - 10 ) + Mw C w ( T f - 10 ) + Mi Ci; ( T f - T i ) = 0.

=120 x 0.1 ( T f - 10 )+ 30 x 4200 (T f - 10) + 400 x 0.04 (T f - T i) = 0.

=12Tf - 120 + 126000Tf - 1260000 + 16Tf - 16 T i = 0

= - 16 T i = 1260120 ( 26028 x T f)

T i = 157545°C.

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Gantt Charts are used to show the overall length of the project and each activity.

A Gantt chart is a sort of bar chart that shows a project timetable. It was created by Henry Gantt, who popularized the format between the years of 1910 and 1915. The dependence structures between activities and the state of the current schedule are also displayed in modern Gantt charts.

A Gantt chart is a project management tool that helps with the planning and scheduling of projects of all kinds. They are especially helpful for streamlining complex projects, though.

Thus, option B is correct.

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Answer:

A. Blackhole

C. Physical disconnection/air gapping

D. Sandboxing

Here are the methods of containment based on the concept of isolation:

Physical disconnection/air gapping is the most effective method of isolation, separating the infected system from the rest of the network.

Sandboxing isolates the infected system in a controlled environment, allowing analysis and cleaning without affecting the rest of the network. Quarantine isolates the infected system from the rest of the network until it can be cleaned, preventing it from infecting other systems.

The following methods are not based on the concept of isolation:

Blackhole: This is a method of redirecting malicious traffic to a dead end. This does not isolate the infected system, but it does prevent the malicious traffic from reaching other systems on the network.

Sinkhole: This is a method of redirecting malicious traffic to a honeypot. This does not isolate the infected system, but it does allow security researchers to collect information about the malicious traffic.

Therefore, the methods of containment based on the concept of isolation are Physical disconnection/air gapping, Sandboxing, and Quarantine.

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Answer:

A relief valve is either in the pressure reducer or in the downstream side of the system to ensure that the control air pressure does not exceed about 30 psig.

Answer:

i need points 425677

Explanation:

yurrrrrr  awnser C

Answer:

It is known as (PCS)

Explanation:

That sounds a lot like:

(aka. a stylized picture of an object representing a word, syllable, or sound, as found in ancient Egyptian and other writing systems.)

The wires at positions A and B support a pin with a diameter of d from which the tube hangs. A hollowed square with an inner dimension of 8.5 inches makes up the cross section.

In mathematics, a dimension is the length or width of an area, region, or region in one direction. It is just the measurement of an object's length, width, and height. In general, dimensions are written as follows: length, breadth.

We exist in a three-dimensional universe. The homes we live in and the items we use on a daily basis all have three components: length, length, and width.

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After the loops complete, the contents of the array a will be {1, 1, 1, 1, 1, 1, 1, 1, 1, 1}.

This is because the loop starts at index 1 and goes until index 9 (i < 10), and for each iteration, the value at index i is set to the value at index i - 1. Since the value at index 0 is 1, all the values in the array will be set to 1. This means that the resulting array will contain all 1s, from index 0 to index 9.

As a result, the array a will contain 10 elements, each with the value 1. This is a common pattern used when dealing with arrays in programming, as it allows for manipulating elements in the array without having to manually set the values.

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After the loops complete, the contents of the array a will be {1, 1, 1, 1, 1, 1, 1, 1, 1, 1}.

This is because the loop starts at index 1 and goes until index 9 (i < 10), and for each iteration, the value at index i is set to the value at index i - 1. Since the value at index 0 is 1, all the values in the array will be set to 1. This means that the resulting array will contain all 1s, from index 0 to index 9.

As a result, the array a will contain 10 elements, each with the value 1. This is a common pattern used when dealing with arrays in programming, as it allows for manipulating elements in the array without having to manually set the values.

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Answer:

I think A is correct

The two technicians are right in their given assessment about the use of collapsible steering columns and collapsible brake pedals to reduce the risk of trapping the driver's feet.

This refers to the vehicular movement from one point to another, obeying traffic rules, and respect for other drivers and pedestrians.

Hence, we can see that with regards to safe driving, the opinions of both Technicians A and B are both correct as they both want the safety of the car and the driver.

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Answer: jay is traveling at 4 miles per hour :)

Explanation:

Answer:

900 psig

Explanation:

Some electronic ignition systems eliminate the use of spark plug wires by utilizing individual coil-on-plug (COP) ignition coils.

Traditional ignition systems rely on spark plug wires to transfer the high voltage current from the ignition coil to the spark plugs. However, in electronic ignition systems with COP design, each spark plug is directly connected to an individual ignition coil. These ignition coils are typically mounted directly on top of the spark plugs.

When the ignition system receives a signal to fire a specific spark plug, the corresponding ignition coil generates a high voltage current and delivers it directly to the spark plug. This eliminates the need for spark plug wires, as the ignition coil and spark plug are integrated into a single unit.

COP ignition systems offer several advantages, including improved ignition performance, reduced energy loss, and enhanced engine efficiency. Additionally, they minimize the potential for spark energy loss or interference caused by aging or damaged spark plug wires.

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i. The given metal has a crack of length 3.6 × 10−2 mm and the radius of curvature is 1.8 × 10−4 mm. The tensile stress of the metal is given as 20 MPa.

The maximum stress of the metal can be calculated by using the formula:
\(σ_max = σ_applied × (√(π × a))\)where,σ_max = maximum stressσ_applied = applied stressa = radius of curvature/2 = 1.8 × 10−4/2 = 9 × 10−5 mmThe value of a should be in meters, so we convert 9 × 10−5 mm to meters.
a = 9 × 10−8 m.
Substituting the given values,\(σ_max = 20 × 106 × (√(π × 9 × 10−8))σ_max = 94.76 MPa\)
Therefore, the maximum stress of the given metal is 94.76 MPa.

ii. The modulus of elasticity of the metal is given as 100 GPa and the specific surface energy is given as 3.5 J/m2.
The critical stress of the metal can be calculated by using the formula:
\(σ_c = 2 × γ × (√(π × a))\)/Ewhere,σ_c = critical stressγ = specific surface energyE = modulus of elasticitya = radius of curvature/2 = 1.8 × 10−4/2 = 9 × 10−5 mmThe value of a should be in meters, so we convert 9 × 10−5 mm to meters. a = 9 × 10−8 m.
Substituting the given values,\(σ_c = 2 × 3.5 × (√(π × 9 × 10−8))/100 × 109σ_c = 13.93 MPa\)

Therefore, the critical stress of the given metal is 13.93 MPa.

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Answer: It takes the form of heat or thermal power.

Explanation: I got it right on the test.

Answer:

B. It takes the form of heat or thermal power.

Explanation:

edg21

The statements provided in options A, C, D, and E are correct in relation to a DC motor.

DC motor is an electronic machine that transforms electrical energy into mechanical energy. DC motor functions using direct current. In the context of the DC motor, true statements are given below:

However, the following statements are not correct in terms of a DC motor.

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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:

The null hypothesis is that the mean fill volume is 16 oz, and the alternative hypothesis is that the mean fill volume is different from 16 oz. The level of significance is 5%, and the sample size is 15. The test statistic is t=0.0367t=0.0367. The p-value is 0.9738.

Since the p-value is greater than the level of significance, we fail to reject the null hypothesis. Therefore, there is not enough evidence to conclude that the mean fill volume is different from 16 oz. The engineer should not reset the machine.

```

The test statistic is calculated as follows:

t = (x - μ) / s / sqrt(n)

= (16.0367 - 16) / 0.0551 / sqrt(15)

= 0.0367

The p-value is calculated using the t-distribution with 14 degrees of freedom.

p-value = 2 * t.cdf(-0.0367, 14)

= 0.9738

```

The performance of environmental aspects is typically referred to as environmental performance. This term is used to describe the degree to which an organization's activities, products, or services impact the natural environment.

Environmental performance is becoming increasingly important for organizations as stakeholders and consumers demand greater transparency and accountability in environmental management.

Environmental performance is measured using a range of indicators, such as energy consumption, water usage, greenhouse gas emissions, waste generation, and pollution levels.

These indicators help organizations to identify their environmental impacts, set targets for improvement, and monitor progress over time.

There are several benefits to achieving good environmental performance, including:

1. Enhanced reputation and brand image: Organizations that demonstrate strong environmental performance can build a positive reputation and enhance their brand image, which can lead to increased customer loyalty and sales.

2. Regulatory compliance: Meeting or exceeding environmental regulations and standards can help organizations avoid fines, penalties, and legal liabilities.

3. Cost savings: Improving environmental performance can lead to cost savings through reduced resource consumption, improved efficiency, and waste reduction.

4. Competitive advantage: Organizations that prioritize environmental performance can gain a competitive advantage by differentiating themselves from competitors and attracting environmentally conscious customers.

Overall, environmental performance is a critical aspect of sustainable development, and organizations must prioritize it to ensure long-term success and resilience.

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Answer:

Explanation:

Given that :

the diameter of the reservoir D = 18 mm

the diameter of the manometer d = 6 mm

For an equilibrium condition ; the pressure on both sides are said to be equal

∴

\(\Delta \ P = \rho _{water} g \Delta h_{water} = \rho _{oil} g \Delta h_{oil}\)

\(\Delta \ P = \rho _{oil} g (x+L) ----- (1)\)

According to conservation of volume:

\(A*x = a*L\)

\(\dfrac{\pi}{4}D^2x = \dfrac{\pi}{4}d^2 L\)

\(x = ( \dfrac{d}{D})^2L\)

Replacing x into (1) ; we have;

\(\Delta \ P = \rho _{oil} g ( ( \dfrac{d}{D})^2L+L)\)

\(\Delta \ P = \rho _{oil} g \ L ( ( \dfrac{d}{D})^2+1)\)

\(L = \dfrac{\Delta \ P}{\rho _{oil} g \ ( ( \dfrac{d}{D})^2+1)}\)

Thus; the liquid deflection is : \(L = \dfrac{\Delta \ P}{\rho _{oil} g \ ( ( \dfrac{d}{D})^2+1)}\)

when the applied pressure is equivalent to 25 mm of water (gage); the liquid deflection is:

\(L = \dfrac{\Delta \ P}{\rho _{oil} g \ ( ( \dfrac{d}{D})^2+1)}\)

\(L = \dfrac{\rho_{water} \g \Delta \ h}{\rho _{water} SG_{oil}g \ ( ( \dfrac{d}{D})^2+1)}\)

\(L = \dfrac{\g \Delta \ h}{SG_{oil}g \ ( ( \dfrac{d}{D})^2+1)}\)

\(L = \dfrac{25}{0.827 ( ( \dfrac{6}{18})^2+1)}\)

L = 27.21  mm

Answer:

yes.

Explanation:

To determine the load intensities, we need to first find the reactions at the supports of the beam. the load intensities are w1 = 125 lb/ft and w2 = 375 lb/ft for equilibrium if P = 500 lb and L = 12 ft.

Assuming the loads are applied at distances of x1 and x2 from the left support, the reactions at the supports are:

Sum of moments about the left support:
(R2)(12 ft) - (500 lb)(x2) - (1000 lb)(6 ft - x1) = 0

Sum of forces in the vertical direction:
R1 + R2 - 500 lb - 1000 lb = 0

Solving for R1 and R2 gives:
R1 = 750 lb
R2 = 750 lb

Now, to determine the load intensities, we can use the fact that the load distribution on the foundation is linearly varying. We can assume that the load intensity at any point along the beam is proportional to the distance from that point to the left support.

Let w1 and w2 be the load intensities at x1 and x2, respectively. Then:

w1 = (R1 - 500 lb)x1/6 ft
w2 = (R1 - 500 lb)(12 ft - x2)/6 ft

Substituting the values for R1 and solving for w1 and w2, we get:

w1 = 125 lb/ft
w2 = 375 lb/ft

Therefore, the load intensities are w1 = 125 lb/ft and w2 = 375 lb/ft for equilibrium if P = 500 lb and L = 12 ft.

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Answer:

The correct option is - A categorical syllogism argues that A and B are both members of C whereas a conditional syllogism argues that if A is true then B is also true.

Explanation:

As,

Categorical syllogisms follow an "If A is part of C, then B is part of C" logic.

Conditional syllogisms follow an "If A is true, then B is true" pattern of logic.

So,

The correct option is - A categorical syllogism argues that A and B are both members of C whereas a conditional syllogism argues that if A is true then B is also true.

Student should use the smallest amount of reactant 2 to meet the criteria of the design.

Here,

Stoichiometry is a branch of chemistry that deals with the relationships between reactants and products in chemical reactions. It involves calculations and ratios based on the balanced chemical equation to determine the amounts of substances involved in the reaction.

Now,

To meet the criteria of designing a device that uses 25 grams of reactant 1 and produces the maximum amount of heat with the smallest amount of reactant 2, the students should use the smallest possible amount of reactant 2.

The exact quantity of reactant 2 will depend on the specific reactants and their stoichiometry.

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Answer:

4.2ms

Explanation:

Calibrated time= 0.3+0.2+0.5+1.4= 2.4

Measured time= 6.6ms

Accuracy is closeness of measurement to an observed or true value

Accuracy= 6.6-2.4= 4.2ms

Answer:

Email etiquette is important

Explanation:

It is important to understand how to use correct email etiquette because it helps you communicate more clearly. It also makes you seem a bit more professional too. For example depending in who you're emailing like say you're emailing your teacher for help then here's how it'd go:

Dear(teacher name, capitalize, never use first name unless they allow it)

Hello (teacher name), my name is (first and last name) from your (number class) and I was wondering if you could please help me out with (situation, be clear on what you need help with otherwise it won't get through to them)? If you could that would be greatly appreciated!

Sincerely,

(your name first and last)