Use a quarter-wavelength transformer to match a lossless transmission line of characteristic impedance of300ohmsto a resistive load of75ohms. Find the impedance of the transformer. Determine the standing wave ratio in the main line and the standing wave ratio in the transformer. What would be the physical length of the quarter-wave transformer at a frequency of100MHz, assuming that the transformer is a coaxial cable with dielectric constant equal to 16 ?

Answer: the minimum mass flow rate of air required to generate a power output of 105 MW is 238.2 kg/s

Explanation:

from the T-S diagram, we get the overall pressure ratio of the cycle is 9

Calculate the pressure ratio in each stage of compression and expansion. P1/P2 = P4/P3  = √9 = 3

P5/P6 = P7/P8  = √9 =3  

get the properties of air from, "TABLE A-17 Ideal-gas properties of air", in the text book.

At temperature T1 =300K

Specific enthalpy of air h1 = 300.19 kJ/kg

Relative pressure pr1 = 1.3860  

At temperature T5 = 1200 K

Specific enthalpy h5 = 1277.79 kJ/kg

Relative pressure pr5 = 238  

Calculate the relative pressure at state 2

Pr2 = (P2/P1) Pr5

Pr2 =3 x 1.3860 = 4.158  

get the two values of relative pressure between which the relative pressure at state 2 lies and take the corresponding values of specific enthalpy from, "TABLE A-17 Ideal-gas properties of air", in the text book.  

Relative pressure pr = 4.153

The corresponding specific enthalpy h = 411.12 kJ/kg  

Relative pressure pr = 4.522

The corresponding specific enthalpy h = 421.26 kJ/kg  

Find the specific enthalpy of state 2 by the method of interpolation

(h2 - 411.12) / ( 421.26 - 411.12) =  

(4.158 - 4.153) / (4.522 - 4.153 )

h2 - 411.12 = (421.26 - 411.12) ((4.158 - 4.153) / (4.522 - 4.153))  

h2 - 411.12 = 0.137

h2 = 411.257kJ/kg  

Calculate the relative pressure at state 6.

Pr6 = (P6/P5) Pr5

Pr6 = 1/3 x 238 = 79.33  

Obtain the two values of relative pressure between which the relative pressure at state 6 lies and take the corresponding values of specific enthalpy from, "TABLE A-17 Ideal-gas properties of air", in the text book.  

Relative pressure Pr = 75.29

The corresponding specific enthalpy h = 932.93 kJ/kg  

Relative pressure pr = 82.05

The corresponding specific enthalpy h = 955.38 kJ/kg  

Find the specific enthalpy of state 6 by the method of interpolation.

(h6 - 932.93) / ( 955.38 - 932.93) =  

(79.33 - 75.29) / ( 82.05 - 75.29 )

(h6 - 932.93) = ( 955.38 - 932.93) ((79.33 - 75.29) / ( 82.05 - 75.29 )

h6 - 932.93 = 13.427

h6 = 946.357 kJ/kg

Calculate the total work input of the first and second stage compressors

(Wcomp)in = 2(h2 - h1 ) = 2( 411.257 - 300.19 )

= 222.134 kJ/kg  

Calculate the total work output of the first and second stage turbines.

(Wturb)out = 2(h5 - h6) = 2( 1277.79 - 946.357 )

= 662.866 kJ/kg  

Calculate the net work done

Wnet = (Wturb)out  - (Wcomp)in

= 662.866 - 222.134

= 440.732 kJ/kg  

Calculate the minimum mass flow rate of air required to generate a power output of 105 MW

W = m × Wnet

(105 x 10³) kW = m(440.732 kJ/kg)

m = (105 x 10³) / 440.732

m = 238.2 kg/s

therefore the minimum mass flow rate of air required to generate a power output of 105 MW is 238.2 kg/s

The mass of the liquid is 61.029 N. The mass of the liquid is 60.636 N in the second scenario.

The density of a solid, liquid, or gas describes how closely packed the particles are. Density is defined as the amount of mass per unit volume.

The mass of a liquid can be calculated using its volume and density. The formula is:

mass = density x volume

We are given the density of the unknown liquid as 12400 N/m³ and the volume as 500 cm³.

We need to convert the volume from cm³ to m³ before we can use the formula:

500 cm³ = 0.0005 m³

(a) Using the standard value of gravity (9.81 m/s²):

mass = density x volume x gravity

= 12400 N/m³ x 0.0005 m³ x 9.81 m/s²

= 61.029 N

Therefore, the mass of the liquid is 61.029 N.

(b) Using the minimum value of gravity on Earth (9.78 m/s²):

mass = density x volume x gravity

= 12400 N/m³ x 0.0005 m³ x 9.78 m/s²

= 60.636 N

Therefore, the mass of the liquid is 60.636 N.

(c) Using the maximum value of gravity on Earth (9.83 m/s²):

mass = density x volume x gravity

= 12400 N/m³ x 0.0005 m³ x 9.83 m/s²

= 61.422 N

Thus, the mass of the liquid is 61.422 N.

For more details regarding density, visit:

https://brainly.com/question/29775886

#SPJ9

Two things that environmental engineers concentrate on during green projects are fossil fuels and natural resources.

Environmental engineers are responsible for ensuring that there is little or no effect on the environment as a result of human activities.

Hence, two things that environmental engineers concentrate on during green projects are fossil fuels and natural resources.

Learn more about environmental engineer here : https://brainly.com/question/1322350

#SPJ1

An extremum is a point where the function has its highest or lowest value, and at which the slope is zero.

The dimensions to be used if the volume is fixed and the cost of construction is to be kept to a minimum is as follows;

Reason:

The given parameters are;

Form of silo = Cylinder surmounted by a hemisphere

Cost of construction of hemisphere per square unit = 2 × The cost of of construction of the cylindrical side wall

Required:

The dimensions to be used if the volume is fixed and the cost of construction is to be kept to a minimum

Solution:

The fixed volume of the silo, V, can be expressed as follows;

\(V = \pi \cdot r^2 \cdot h + \dfrac{2}{3} \cdot \pi \cdot r^3\)

Where;

h = The height of the cylinder

r = The radius of the cylinder

The surface area is, Surface Area = 2·π·r·h + 2·π·r²

The cost, C = 2·π·r·h + 2×2·π·r² = 2·π·r·h + 4·π·r²

Therefore;

\(C = 2 \times \pi \times r\times \dfrac{V - \dfrac{2}{3} \cdot \pi \cdot r^3 }{\pi \cdot r^2 } + 4 \cdot \pi \cdot r^2 = \dfrac{8 \cdot r^3 \cdot \pi + 6 \cdot V}{3 \cdot r}\)

At the minimum value, we have;

Which gives;

16·π·r³ = 6·V

Which gives;

\(h = \dfrac{\dfrac{8 \cdot \pi \cdot r^3}{3} - \dfrac{2}{3} \cdot \pi \cdot r^3 }{\pi \cdot r^2 } = 2 \cdot r\)

h = 2·r

The height of the silo, h = 2 × The radius, 2

Therefore, the dimensions to be used if the volume is fixed and the cost is to be kept to a minimum is, height, h = 2 times the radius

Learn more about extremum point here:

https://brainly.com/question/2869450

The group scopes that can contain objects from any domain within the forest are global and universal.

Group scopes that can contain objects from any domain within the forest:

a. Global

d. Universal

Global and universal group scopes can both contain objects from any domain within the forest.

Global groups are used to organize user accounts and groups from a single domain. They can be assigned permissions and access to resources within any domain in the forest.

Universal groups, on the other hand, have a broader scope and can contain objects from any domain within the forest. They are typically used to assign permissions and access across multiple domains in a forest.

Domain local groups are limited to a single domain and are used for assigning permissions and access within that specific domain.

Distribution groups are not specifically related to domain-wide scopes but rather used for email distribution lists in certain messaging systems.

In summary, the group scopes that can contain objects from any domain within the forest are global and universal.

Learn more about Universal here

https://brainly.com/question/28512432

#SPJ11

Answer:

yes it is very hard you should find a reccomended doctor to aid in your situation. But in the meantime how about you give me that lil brainliest thingy :p

The following accurately describes how switches and hubs work

C. Switches use the hardware address in the frame to send it only to the port where the device is located.

B. A hub repeats frames to all ports, regardless of the destination address.

The option A is partially correct but not completely. A switch uses the logical addresses in a packet to send it through the correct port to a specific device, not to all VLANs defined on that port. Therefore, options C and B are the most accurate descriptions of how switches and hubs work, respectively.

Know more about switches and hubs here:

https://brainly.com/question/13260104

#SPJ11

Answer:

installing large side mirrors

Explanation:

You can reduce your vehicle's blind spot by installing large side mirrors.

Answer:

Used to recall the direction a standard screw

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.

For more details regarding communication process, visit:

https://brainly.com/question/15281884

#SPJ2

Answer:

We know that the total weight of the cakes is 12 cakes * 1.5 kg/cake = 18 kg

We also know that the piece given to boys is 20 g and that given to girls is 30 g.

Let's assume that the number of boys in the school is x.

The number of girls in the school is 2x because it is twice the number of boys.

The total weight of cake given to boys is x * 20 g = 20x g

The total weight of cake given to girls is 2x * 30 g = 60x g

The total weight of cake given to both boys and girls is 20x g + 60x g = 80x g

We can now set up the following equation: 80x g = 18 kg * 1000 g/kg

Solving for x, we get x = (18000/80) = 225

This means there are 225 boys in the school.

The number of girls in the school is 2x = 2 * 225 = 450

Therefore, the total number of children in the school is 450 girls + 225 boys = 675

Purchasing  can become worse over time as a result of inflation.

The quantity of items or services that one measure of a currency can be utilized to purchase determines the currency's value.

This is due to the possibility that you will purchase less goods or services as a result of price increases. The buying power of a money is another term for it.

Buying or purchasing power, when used in relation to investments, is the credit limit that a client has in relation to the marginable assets that are currently in their brokerage account.

The quantity of products or services that one dollar can currently buy is measured by its buying power.

Inflation gradually lowers a country's currency purchasing power over time.

Learn more about Purchasing power of money  here

https://brainly.com/question/16467725

Answer:

The correct answer is He forgot to include indirect costs such as advertising, legal fees, and repairs.

Explanation:

Modern cars' complex systems perform all the foregoing functions, with the exception of assisting in the preservation of resale value.

Therefore, the answer is "helping retain resale value".

Learn more:

brainly.com/question/10589909

The relationship between the birds and the snakes in this scenario is an example of interspecific competition.

The friendship between the birds and the snakes in this scenario is an model of interspecific competition. The fowls and snakes are two different species playing for the same fare source (mice) in the unchanging ecosystem.

This type of contest is a common ecological wonder and can have significant impacts on the people sizes and dynamics of the species complicated. In some cases, individual species may outcompete the different, leading to a decline in the populace of the weaker competitor. In different cases, the species can coexist by partitioning resources or complying to different environmental niches.

Learn more about interspecific competition from

https://brainly.com/question/1464871

#SPJ1

You apply a Pulse Width Modulation (PWM) signal to the Enable line to regulate the motor's speed. The motor will operate more slowly the narrower the pulse width.

To learn more about PWM signal refer to:

https://brainly.com/question/15878456

#SPJ4

Answer:

This image is blurry redo the question

Explanation:

The entropy change of helium during an irreversible process can be calculated using the formula ΔS = cv × ln(T2/T1).

How can you calculate the entropy change of helium during an irreversible process?

The entropy change of helium during the process assuming the process is irreversible is

0.214 Btu/R

Here is how to solve it: Entropy (S) can be defined as the measure of disorder or randomness of a system. The entropy change of helium during the process assuming the process is irreversible can be calculated as follows:

ΔS = cv × ln(T2/T1)

where've is the constant volume specific heat of helium at

room temperature = 0.753 Btu/lbm-Rln

is the natural logarithmT2 is the final temperature of the heliumT1 is the initial temperature of the helium.R is the

gas constant of helium = 0.4961 Btu/lbm-R

T1 is not given, so let us assume that it is the

room temperature of 298 K

The temperature at the end of the process is not given, so we will solve the equation using a variable for

T2.ΔS = cv × ln(T2/T1)ΔS

= 0.753 × ln(T2/298)ΔS

= 0.753 × (ln T2 - ln 298)ΔS

= 0.753 ln T2 - 0.753 ln 298

Rearranging the equation,

ΔS = 0.753 ln T2 - 0.214

Therefore, the entropy change of helium during the process assuming the process is irreversible is 0.214 Btu/R.

Learn more about:entropy change

brainly.com/question/30691597

#SPJ11

If the architect insists on exceeding the recommended glass percentage in ASHRAE Std. 90.1, the issues to explain to the owner are: Pros - increased daylight, better views, improved aesthetics. Cons - increased energy consumption, reduced privacy, higher cost.

If the architect insisted on having more glass than the prescriptive percentage guidelines in ASHRAE Std. 90.1, the issues that he should explain to the owner are as follows:Pros:1. Increased daylight: The first advantage of using more glass is that it provides more daylighting, which is better for indoor environments.2. Better views: More glass allows for better views of the outdoors. This can be important in commercial settings where people may be looking out of windows to take a break from work.3. Improved aesthetics: The use of glass can make a building look more modern and sleek, which can be a selling point for owners.Cons:1. Increased energy consumption: One of the significant downsides to using more glass is that it can lead to increased energy consumption. Glass is not a good insulator, so more of it can lead to higher heating and cooling costs.2. Reduced privacy: Another issue with using more glass is that it can reduce privacy. This may be a problem in areas where people need to have private conversations or work in an environment where they don't want others to see them.3. More expensive: Finally, using more glass is likely to be more expensive than using other materials. Glass can be fragile, and it requires specialized installation, so it can be costly to use.

Learn more about architect here :-

https://brainly.com/question/28663844

#SPJ11

Answer:

see and make me brainlist

Explanation:

What is oxy fuel cutting used for?

Oxy-fuel cutting is used for the cutting of mild steel. Only metals whose oxides have a lower melting point than the base metal itself can be cut with this process. Otherwise as soon as the metal oxidises it terminates the oxidation by forming a protective crust.

Total Pan Evaporation (m) for the period (May-October) is 12.941 m. May: 1.276 m, June: 1.946 m, July: 3.562 m,August:2.799 m,September: 1.87 m,October: 1.268 m.

Evaporation is the process by which a liquid is converted into a gas or vapor. The liquid absorbs heat from its surroundings and releases it into the atmosphere, which causes it to turn into a vapor. This process is a type of phase transition, in which the molecules of the liquid gain enough kinetic energy to overcome the attractions between them and become a gas. Evaporation occurs when a liquid is exposed to air or other gases, or when the temperature of the liquid is raised. It is the reverse of condensation, which occurs when a gas is cooled and turns into a liquid.

To learn more about Evaporation

https://brainly.com/question/16444831

#SPJ4

The most concrete and specific term among the options provided is the White House. It refers to a particular building located in Washington, D.C., which serves as the official residence and workplace of the President of the United States. It has a distinct identity, history, and purpose, making it a highly specific and easily identifiable structure.

The White House is a globally recognized symbol of American governance and power. Its specific architectural design, located at 1600 Pennsylvania Avenue, sets it apart from generic buildings or houses. Unlike the terms "building" or "house," which can encompass a wide range of structures, the White House refers to a singular and iconic edifice with a rich historical significance. Its unique purpose as the center of American political leadership makes it the most concrete and specific option among those provided.

To know more about White House click here,

https://brainly.com/question/32426582

#SPJ11

aehhkl;sj,ldmdfm.nxtg,W{Glw4atokgh,h,rn

The normal strain in wire CE is equal to 10 mm 10 m = 0.001.

Normal strain is a type of strain that occurs when an object is subjected to a stress where the stress is applied in a direction that is perpendicular to the surface of the object. This type of strain is also known as shear strain or transverse strain.

Normal strain is defined as the ratio of the change in length to the original length of the wire.
For wire CE, the original length L is equal to the length of the beam between points C and E, which is 10m. The change in length is equal to the downward displacement of end C, which is 10mm.
Therefore, the normal strain in wire CE is equal to $\frac{10 mm}{10 m} = 0.001$.
For wire BD, the original length L is equal to the length of the beam between points B and D, which is 10m. The change in length is equal to zero since point B is not displaced.
Therefore, the normal strain in wire BD is equal to 0.

To learn more about normal strain
https://brainly.com/question/13088407
#SPJ1

In the given scenario, Fred can explore alternative ways to redesign the Model I Pulverizer at a more affordable price, present data on sales and performance, and convince colleagues and management to consider a redesign for increased profits while ensuring user safety.

Scenario (1) - Fred suggests to his engineering colleges that the Model I Pulverizer should be redesigned so it does not plug. His colleagues reply that the company probably cannot afford the expense of reengineering the Model I, and they conclude that the legal staff's recommendations should be sufficient. Dissatisfied, in his spare time Fred redesigns the Model I Pulverizer and solves the plugging problem in an affordable way.In the given scenario, the other alternatives that Fred can use to resolve the problem are:He can come up with some alternative ways to redesign the Model I Pulverizer at a more affordable price.He can try to explain to the engineering colleges how the redesign would help increase the sale of the Model I Pulverizer and generate more profits for the company.He can go to the higher management with his ideas and suggestions for the redesigning of the Model I Pulverizer, with his working model and case study.Fred can also think of an alternative way of redesigning only the chute, so it can have a much better design to avoid the plugging scenario.Fred can conduct more market research on the Model I Pulverizer's sales and performance and present that data to the management to convince them to redesign the product.In short, Fred can try to convince his engineering colleagues and management to redesign the product, considering the potential increase in profits that a redesign can bring. He can come up with an alternative solution that is more affordable and does not compromise the safety of the user, in this case, the operator.

Learn more about colleagues here :-

https://brainly.com/question/29737897

#SPJ11

Answer:

The temperature gauge showing that the vehicle has been running warmer or has recently began to have issues from overheating is  an idication that your vehicle may be developing a cooling system problem.

Explanation:

The thickness of aluminium needed to stop the beam electrons, protons and alpha particles at the given dfferent kinetic energies is 1.5 x 10⁻¹⁴ m.

The thickness of the aluminum can be determined using from distance of closest approach of the particle.

\(K.E = \frac{2KZe^2}{r}\)

where;

\(r = \frac{2KZe^2}{K.E} \\\\r = \frac{2 \times 9\times 10^9 \times 13\times (1.6\times 10^{-19})^2}{2.5 \times 10^6 \times 1.6 \times 10^{-19}} \\\\r = 1.5 \times 10^{-14} \ m\)

Since the magnitude of charge of electron and proton is the same, at equal kinetic energy, the thickness will be same. r = 1.5 x 10⁻¹⁴ m.

Charge of alpah particle = 2e

\(r = \frac{2KZe^2}{K.E} \\\\r = \frac{2 \times 9\times 10^9 \times 13\times (2 \times 1.6\times 10^{-19})^2}{10 \times 10^6 \times 1.6 \times 10^{-19}} \\\\r = 1.5 \times 10^{-14} \ m\)

Thus, the thickness of aluminium needed to stop the beam electrons, protons and alpha particles at the given dfferent kinetic energies is 1.5 x 10⁻¹⁴ m.

Learn more about closest distance of approach here: https://brainly.com/question/6426420

Each aircraft has a speed limit of 5 MPH within 50 feet. The speed limit for vehicles on the airport apron and away from aircraft is 15 mph.

Vmca is defined as the minimum speed at which this directional control can be maintained in the air. This directional control is one engine not running (which is important in a twin-engine airplane), the engine running at takeoff power, and the maximum bank of good engines at 5 degrees. .

Airplane pilots see highway markers. It's the thick white line next to the "SPEED ENFORCED BY AIRCRAFT" sign. If the pilot sees the vehicle exhibiting unsafe behavior or moving faster than normal between markers, they will contact highway cops and provide a description of the vehicle.

250 knots. § 91.117 Aircraft speed. No person shall operate an aircraft at an indicated airspeed in excess of 250 knots (288 mph) and below 10,000 feet MSL, unless otherwise authorized by management.

To learn more about aircraft visit:

https://brainly.com/question/14824822

#SPJ4

After the replacement of loading with equivalent force-couple system, Therefore, loadings (c) and (h) are equivalent.

in System Equivalents: two force-couple systems that have the same net moment and net force on a body.

RA= -(300+200)

= -500N

MA=400N.M +200*3

MA=1000N.M

RA=200+300

=500N

MA= -400+300*3

=500N.M

RA= -(200+300)

= -500N

RA=500N

MA=400-500*3

= -11OON.M

(B) No '2' beams are equivalent

Your question is incomplete, Find the attachment 'missing part'

The explanation is in attachment on Explanation 1 &2 attachment

learn more about the beam loadings here: https://brainly.com/question/17237046

#SPJ4