Minimum bending radius: a.) depends on the hardness of the metal before bending b.) is a non-issue if springback can be controlled c.) is independent on the thickness of the sheet d.) depends on surface coating and resilience of the metal e.) is independent of the temper of the heat treated blank and operator's

Answers

Answer 1

Minimum bending radius depends on surface coating and resilience of the metal. So the correct option is (d).

Explanation:

The minimum bending radius refers to the smallest radius that can be achieved during the bending process without causing cracking or other defects in the material. The minimum bending radius is influenced by various factors, including the type of metal being bent, its surface coating, and its resilience or ductility.

For example, a metal with a hard surface coating or low resilience may require a larger minimum bending radius to avoid cracking or other defects. Conversely, a metal with a softer surface coating or higher resilience may be able to tolerate a smaller minimum bending radius.

Hence, the correct option is (d).

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Related Questions

A 2 stage piston compressor has a(n) ____ where compressed air is cooled while passing to the second stage.

Answers

A 2 stage piston compressor has an intercooler where compressed air is cooled while passing to the second stage.

What is computer programming

Answers

Answer:

Computer programming is where you learn and see how computers work. People do this for a living as a job, if you get really good at it you will soon be able to program/ create a computer.

Explanation:

Hope dis helps! :)

The cold drawn AISI 1040 steel bar with 25-mm width and 10-mm thick has a 6- mm diameter thru hole in the center of the plate. The plate is subjected to a completely reversed axial load that fluctuates from 12kN to 28kN. Use notch sensitivity of 0.83.

Required:
a. Estimate the fatigue factor of safety based on yielding criteria.
b. Estimate the fatigue factor of safety based on Goodman and Morrow criteria.

Answers

Answer:

A) ( N ) = 1.54

B) N ( Goodman ) = 1.133, N ( Morrow) = 1.35

Explanation:

width of steel bar = 25-mm

thickness of steel bar = 10-mm

diameter = 6-mm

load on plate = between 12 kN AND 28 kN

notch sensitivity = 0.83

A ) Fatigue factor of safety based on yielding criteria

= δa + δm = $\frac{Syt}{n}$ = 91.03 + 227.58 = 490 / N

therefore Fatigue number of safety ( N ) = 1.54

δa (amplitude stress ) = kf ( Fa/A) = 2.162 * ( 8*10^3 / 190 ) = 91.03 MPa

A = area of steel bar = 190 mm^2 , Fa = amplitude load = 8 KN , kf = 2.162

δm (mean stress ) = kf ( Fm/A ) = (2.162 * 20*10^3 )/ 190 = 227.58 MPa

Fm = mean load = 20 *10^3

B) Fatigue factor of safety based on Goodman and Morrow criteria

δa / Se + δm / Sut = 1 / N

= 91.03 / 183.15 + 227.58 / 590 = 1 /N

Hence N = 1.133 ( based on Goodman criteria )

note : Se = endurance limit (calculated) = 183.15 , Sut = 590

applying Morrow criteria

N = 1 / ( δa/Se) + (δm/ δf )

= 1 / ( 91.03 / 183.15 ) + (227.58 / 935 )

= 1.35

prescription eye protection suitable for an electrician should always include

Answers

Answer:

If prescription lenses are required, they must be covered by protective goggles or the lenses and frames must be ANSI approved.

Explanation:

this includes side shields for angular protection. Goggles and safety glasses are primary protectors. Goggles fit around the area of the face near the eye. hope this helps you :)

if the oil pressure gauge fluctuates over a wide range from zero to normal operating pressure, the most likely cause is group of answer choices low oil supply. broken or weak pressure relief valve spring. air lock in the scavenge pump intake.

Answers

If the oil pressure gauge fluctuates over a wide range from zero to normal operating pressure, the most likely cause is air lock in the scavenge pump intake.

Oil pressure gauge fluctuation is a common problem for the engine. It can occur due to various reasons such as faulty oil pressure gauge, oil pump failure, improper maintenance of the engine, oil leakage, and much more. But if the oil pressure gauge fluctuates over a wide range from zero to normal operating pressure, the most likely cause is air lock in the scavenge pump intake.The scavenge pump in the engine is used to remove the oil from the engine's crankcase and delivers it back to the oil tank. If there is an air lock in the scavenge pump intake, then it will not pump the oil properly from the crankcase and deliver it back to the oil tank. It will cause the oil pressure to fluctuate over a wide range from zero to normal operating pressure.To fix this issue, you should first check the oil level in the engine and make sure that it is at the proper level. After that, you can check the scavenge pump intake for any air lock or blockage. If there is an air lock, then you need to remove it. If there is a blockage, then you need to remove the blockage to get the oil pump working again properly.

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Technician A says that the refractometer reading is determined at the point of the scale where the dark and light areas meet. Technician B says that the reading is determined by where a dial points on a scale. Who is correct

Answers

Answer:

Technician B says that the reading is determined by where a dial points on a scale.

Explanation:

A refractometer is a devise used by scientists to gauge a liquids index of refraction.

The refractive index of a liquid is the ratio of light velocity of a specific wavelength in air to its velocity in the substance in evaluation.

The steps of reading a measurement are;

point the front of the refractometer towards the light source and view into the eyepieceYou will see the line outlined at a different point on the refractometer's internal indexRead the point on the index at which the line falls

What steps should be taken to evaluate the team member's level of competence What method did you use to resolve this problem if you somehow didn't receive the desired expertise?

Answers

The steps that should be taken to evaluate the team member's level of competence are:

A self assessment testAn assessor kind of review. Know development needs. An on as well as off job learning.Put the team In Real scenario.Ask for any form of Clients' Feedback.

The method that I will use to resolve this problem if you somehow didn't receive the desired expertise is to ask a person from my team to teach me how to do it as well as consult external people or the internet.

Why is team competence crucial?

Long used as a framework, competencies help direct employees' behavior toward the issues that are most important to an organization and contribute to success.

Therefore, They can offer a standard method to coordinate, pick out, and nurture talent. For workers, as well as managers, and ultimately the organization, the advantages are obvious.

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If the goal is to power three-phase AC motors, what kind of power distribution panel would you want to use?

Answers

There are different kinds of Ac motors. If the goal is to power three-phase AC motor, the three-phase motor can be run from a single-phase power source.

It is possible to run a 3 phase motor on single phase power?

The act of running a three phase motor on single phase power is very possible. The thing one has to do is to connect or wire the single phase power to the input side of the variable frequency drive that one has and then connect or wire the three phase power of one's motor to the output part of the drive.

Conclusively, A three phase system is known to be able to send a lot of power when viewed with the single phase system. The three circuit conductors is known to have three alternating currents

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The has to produce goods 2 quarters periods. The company has a regular time capacity and forecast demand that is stated state in table below per month. Overtime capacity is 50% of regular time capacity multiply by 1.5 per month. Overtime cost is regular time cost multiply by 1.5, backorder cost is 50% of the regular cost, inventory-holding cost is R5 per unit, and beginning inventory is zero.

Answers

The given problem is concerned with a company that has to produce goods for two quarters' period. The company has a regular time capacity and forecast demand, which is given in the table below per month.

We are required to determine the overtime capacity, overtime cost, backorder cost, inventory-holding cost, and the beginning inventory. Given data: Demand | Regular time capacity50 | 50Overtime capacity | 50% of regular time capacity × 1.5= 50% of 50 × 1.5= 25 × 1.5= 37.5 units per month Overtime cost.

Therefore, the overtime cost and backorder cost are zero. Inventory-holding cost= 50 units × R5 per unit= R250Therefore, the company needs to work at 100% of the regular time capacity and 74% of the overtime capacity to meet the forecast demand of 50 units per month for two quarters.

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In a certain chemical plant, a closed tank contains ethyl alcohol to a depth of 71 ft. Air at a pressure of 17 psi fills the gap at the top of the tank. Determine the pressure at a closed valve attached to the tank 10 ft above its bottom.

Answers

Answer:

the pressure at a closed valve attached to the tank 10 ft above its bottom is 37.88 psi

Explanation:

Given that;

depth 1 = 71 ft

depth 2 = 10 ft

pressure p = 17 psi = 2448 lb/ft²

depth h = 71 ft - 10 ft = 61 ft

we know that;

p = P_air + yh

where y is the specific weight of ethyl alcohol ( 49.3 lb/ft³ )

so we substitute;

p = 2448 + ( 49.3 × 61 )

= 2448 + 3007.3

= 5455.3 lb/ft³

= 37.88 psi

Therefore, the pressure at a closed valve attached to the tank 10 ft above its bottom is 37.88 psi

IV. An annealed copper strip 9 inches wide and 2.2 inches thick, is rolled to its maximum possible draft in one pass. The following properties of annealed copper are given: strength coefficient is 90,000 psi; true strain at the onset of non-uniform deformation is 0.45; and, engineering strain at yield is 0.11. The coefficient of friction between strip and roll is 0.2. The roll radius is 14inches and the rolls rotate at 150 rpm. Calculate the roll-strip contact length. Calculate the absolute value of thetrue strain that the strip undergoes in this operation. Determine the average true stress of the strip in theroll gap. Calculate the roll force. Calculate the horsepower required.

Answers

Answer:

13.9357 horse power

Explanation:

Annealed copper

Given :

Width, b = 9 inches

Thickness, $$h_0=2.2$$ inches

K= 90,000 Psi

μ = 0.2, R = 14 inches, N = 150 rpm

For the maximum possible draft in one pass,

$$\Delta h = H_0-h_f=\mu^2R$$

$$=0.2^2 \times 14 = 0.56$$ inches

$$h_f = 2.2 - 0.56$$

= 1.64 inches

Roll strip contact length (L) = $$\sqrt{R(h_0-h_f)}$$

$$=\sqrt{14 \times 0.56}$$

= 2.8 inches

Absolute value of true strain, $$\epsilon_T$$

$$\epsilon_T=\ln \left(\frac{2.2}{1.64}\right) = 0.2937$$

Average true stress, $$\overline{\gamma}=\frac{K\sum_f}{1+n}= 31305.56$$ Psi

Roll force, $$L \times b \times \overline{\gamma} = 2.8 \times 9 \times 31305.56$$

= 788,900 lb

For SI units,

Power = $$\frac{2 \pi FLN}{60}$$

$$=\frac{2 \pi 788900\times 2.8\times 150}{60\times 44.25\times 12}$$

= 10399.81168 W

Horse power = 13.9357

1. Remove the starter holder
2. Perform house keeping
3. Remove the ballast on the body.
-4. Unplug the male plug from the outlet.
5. Remove the 40-watt fluorescent lamp and the starter.
_6. Remove the lamp holders by untightening the bolt and nut.
-7. Disconnect the terminals from the ballast, starter holder and male plug.

Answers

Answer:

option 6

Explanation:

a regular room is 8.7 m by 2.41 m. Which length of baseboard molding must be purchased to go around the perimeter of the floor?

Answers

When the regular room is 8.7 m by 2.41 m, the perimeter of the floor will be 22.22m.

What is perimeter?

In geometry, the perimeter of a form is described as the whole length of its boundary. the fringe of a shape is determined through including the duration of all of the aspects and edges enclosing the form. it's far measured in linear devices of measurement like centimeters, meters, inches, or feet.

The perimeter system for a rectangle states that P = (L + W) × 2, where P represents perimeter, L represents duration, and W represents width. while you are given the size of a rectangular form, you may simply plug within the values of L and W into the method that allows you to clear up for the perimeter.

It should be noted that the perimeter will be:

= 2 (Length + Width)

= 2(8.7 + 2.41)

= 22.22m

Therefore, when the regular room is 8.7 m by 2.41 m, the perimeter of the floor will be 22.22m.

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Explain any five applications of computer modeling in beams.

Answers

Answer:

Explain any five applications of computer modeling in beams.

Explanation:

What is the magnetic force on a moving electric charge called

Answers

The magnetic force on a free moving charge is perpendicular to both the velocity of the charge and the magnetic field with direction given by the right hand rule. The force is given by the charge times the vector product of velocity and magnetic field.

One situation that can make a measurement with a laser inaccurate is measuring to a _____.

Answers

One situation that can make a measurement with a laser inaccurate is measuring to a reflective surface.

Measuring to a reflective surface with a laser can be challenging since the light from the laser will bounce off the surface and create an inaccurate measurement.

Ensuring Accurate Measurement with a Laser to a Reflective Surface

In order to ensure accurate measurements, it is important to take precautions when measuring to a reflective surface. If possible, the surface should be covered with a non-reflective material so that the laser light does not bounce off it. Additionally, it is best to measure from a distance to avoid any potential reflections. Taking these steps can help to ensure that the measurements taken with a laser are accurate and reliable.

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what is most delicious fod in the philippines?

Answers

Answer:

Well there are a lot of delicious food in the philppines but my most favorite is the Lechon, Adobo, Sisig, Chicken Curry, Crispy pata and Sinigang

Which of the following attributes do all three basic structures share?
a. Their flowcharts all contain exactly three processing symbols.
b. They all begin with a process.
c. They all have one entry and one exit point.
d. They all contain a conditional test.

Answers

The attribute that all three basic structures share is that they all contain a conditional test.

Among the options provided, the attribute that is common to all three basic structures is that they all contain a conditional test. The basic structures refer to the building blocks of programming and flowcharting, namely the sequence, selection (if-else), and iteration (loop) structures. While option a states that their flowcharts contain exactly three processing symbols, this is not accurate as the number of processing symbols can vary depending on the complexity of the structure.

Option b states that they all begin with a process, which is not true for the selection and iteration structures as they involve decision-making or repetitive actions. Option c states that they all have one entry and one exit point, which is not applicable to iteration structures that can have multiple entry and exit points. On the other hand, option d correctly states that all three structures involve a conditional test, which is a key characteristic of the selection and iteration structures.

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URGENT!!

PYTHON CODE
Assume you already have 2 variables: L which refers to a list of integers, and target, which refers to an integer.

Write a code that assigns the value True to a variable called found if the target exists in L and False otherwise

Additional Notes: L and target should not be modified

Answers

The code that assigns the value True to a variable called found if the target exists in L and False otherwise is:

found = target in L

How to determine the code segment?

From the question, we have the following parameters that can be used in our computation:

Initial variables = L and target

Where

L = List and target = integer

The condition is such that:

found = True if the target exists in L found = False if the target does not exist in L

There are several ways to do this.

One of them is the following code segment

found = target in L

Another way is

if target in L:

found = True

else

found = False

Another solution is

found = False

if target in L:

found = True

Answers

The ER diagram for the Temporary Employment Corporation (TEC) based on the business rules given is given below: Attributes for Entities:

(One-to-Many)One candidate can have many job histories. (One-to-Many)One job history can belong to only one candidate. (One-to-One)One placement can belong to only one candidate. (One-to-One)One job opening can be placed by many placements. (One-to-Many)One candidate can have many placements.

In the given diagram below, all the relationships and primary keys are labeled correctly and the ER diagram is resolved for all M:N relationships and 1:N relationships. If you want to add more attributes to each entity, you can do it accordingly:

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(SI units) Molten metal is poured into the pouring cup of a sand mold at a steady rate of 400 cm3/s. The molten metal overflows the pouring cup and flows into the downsprue. The cross section of the sprue is round, with a diameter at the top = 3.4 cm. If the sprue is 20 cm long, determine the proper diameter at its base so as to main- tain the same volume flow rate.

Answers

Answer:

diameter of the sprue at the bottom is 1.603 cm

Explanation:

Given data;

Flow rate, Q = 400 cm³/s

cross section of sprue: Round

Diameter of sprue at the top $d_{top}$ = 3.4 cm

Height of sprue, h = 20 cm = 0.2 m

acceleration due to gravity g = 9.81 m/s²

Calculate the velocity at the sprue base

$V_{base}$ = √2gh

we substitute

$V_{base}$ = √(2 × 9.81 m/s² × 0.2 m )

$V_{base}$ = 1.98091 m/s

$V_{base}$ = 198.091 cm/s

diameter of the sprue at the bottom will be;

Q = AV = (π$d_{bottom}^2$/4) × $V_{base}$

$d_{bottom}$ = √(4Q/π$V_{base}$)

we substitute our values into the equation;

$d_{bottom}$ = √(4(400 cm³/s) / (π×198.091 cm/s))

$d_{bottom}$ = 1.603 cm

Therefore, diameter of the sprue at the bottom is 1.603 cm

Para un intercambiador de calor encargado de precalentar pulpa de fruta, se utiliza agua caliente que entra a 180°C y sale a 78°C, mientras que la pulpa de fruta entra a 3°C y sube su temperatura hasta 55°C. Realizar los esquemas de perfil de temperaturas para un intercambiador de calor que funcione en paralelo y en contracorriente. Además, calcular LMTD.

Answers

Answer:

La diferencia media logarítimica de temperatura del intercambiador en paralelo es aproximadamente 75.466 ºC.

La diferencia media logarítmica de temperatura del intercambiador en contracorriente es aproximadamente 97.881 ºC.

Explanation:

De la teoría de Transferencia de Calor tenemos que un intercambiador de calor en paralelo presenta las siguientes dos características:

1) Tanto el fluido caliente como el fluido frío entran por el mismo lado.

2) Tanto el fluido caliente como el fluido frío salen por el mismo lado.

Mientras que el intercambiador de calor en contracorriente tiene que:

1) El fluido caliente y el fluido frío entran por lados opuestos.

2) El fluido caliente y el fluido frío salen por lados opuestos.

A continuación, anexamos los esquemas de perfil de cada intercambiador.

Ahora, la Diferencia Media Logarítimica de Temperatura ($\Delta T_{lm}$), medida en grados Celsius, queda definida como sigue:

$\Delta T_{lm} = \frac{\Delta T_{1}-\Delta T_{2}}{\ln \frac{\Delta T_{1}}{\Delta T_{2}} }$ (Eq. 1)

Donde $\Delta T_{1}$ y $\Delta T_{2}$ son las diferencias de temperatura de los fluidos en cada extremo del intercambiador, medido en grados Celsius.

Procedemos a determinar esas diferencias y la Diferencia Media Logarítimica de Temperatura para cada configuración:

Intercambiador en paralelo

$\Delta T_{1} = 180\,^{\circ}C-3\,^{\circ}C$

$\Delta T_{1} = 177\,^{\circ}C$

$\Delta T_{2} = 78\,^{\circ}C - 55\,^{\circ}C$

$\Delta T_{2} = 23\,^{\circ}C$

$\Delta T_{lm} = \frac{177\,^{\circ}C-23\,^{\circ}C}{\ln \frac{177\,^{\circ}C}{23\,^{\circ}C} }$

$\Delta T_{lm} \approx 75.466\,^{\circ}C$

La diferencia media logarítimica de temperatura del intercambiador en paralelo es aproximadamente 75.466 ºC.

Intercambiador en contracorriente

$\Delta T_{1} = 180\,^{\circ}C-55\,^{\circ}C$

$\Delta T_{1} = 125\,^{\circ}C$

$\Delta T_{2} = 78\,^{\circ}C-3\,^{\circ}C$

$\Delta T_{2} = 75\,^{\circ}C$

$\Delta T_{lm} = \frac{125\,^{\circ}C-75\,^{\circ}C}{\ln \frac{125\,^{\circ}C}{75\,^{\circ}C} }$

$\Delta T_{lm} \approx 97.881\,^{\circ}C$

La diferencia media logarítmica de temperatura del intercambiador en contracorriente es aproximadamente 97.881 ºC.

Para un intercambiador de calor encargado de precalentar pulpa de fruta, se utiliza agua caliente que

How much horse power does a Lamborghini have

Answers

The Lamborghini SCV12 has 830 horse power.

Answer:

Countach - 375 Huracan - 610 to 630Aventador - 729 to 759Urus - 641Gallardo - 543 to 562Centenario - 770 SCV12 - 830

Explanation:

It really all depends, it varies from 375 to 830, you can't mark one as " Lamborghinis have this much hp always " seeing it fluctuates so much car to car

helppppppp plssss Identifying job responsibilities for staff members is an example of which section of the project charter?

project requirements

project objectives

project team

project description

Answers

The correct answer is project team.

It is supposed that a machine, used for filling plastic bottles with a net volume of 16.0 oz, on average, does not perform according to specifications. An engineer will collect 15 measurements and will reset the machine if there is evidence that the mean fill volume is different from 16 oz. The resulting data from a random sample yield \overline{x}=16.0367x=16.0367 and s=0.0551. Should the engineer reset the machine with a level of significance 5%? Find also the pp-value.

Answers

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

```

Identify and describe which technique should be implemented into the design process in order to improve designs while increasing environmental sustainability

Answers

Answer:

One technique that can be implemented into the design process to improve designs while increasing environmental sustainability is Life Cycle Assessment (LCA).

LCA is a tool that evaluates the environmental impacts of a product or process from cradle to grave, including the extraction of raw materials, manufacturing, transportation, use, and disposal. The goal of LCA is to identify opportunities for reducing the environmental impact of a product or process at each stage of its life cycle.

By implementing LCA into the design process, designers can identify areas where changes can be made to reduce the environmental impact of a product or process. For example, LCA can be used to determine the most environmentally friendly materials to use in a product, the most efficient manufacturing process, the best way to transport the product to reduce emissions, and the most sustainable end-of-life options.

Overall, LCA is an effective technique for improving designs while increasing environmental sustainability by identifying areas where changes can be made to reduce environmental impact throughout the product's life cycle.

What information is needed to set up sales tax in QuickBooks Online for a client who only does business in their home state?

Answers

Answer:

Their company address

When their last tax period started

How often they have to file a tax return

When they started collecting sales tax for the agency

Explanation:

For setup the sales tax information in Quickbooks online for a client who only does business in their home state, we need these information which are given below:

1. Their company addresses

2. Last Tax Time period started

3. How frequently they filed the tax return

3. when they begin to received sales tax

Therefore all the other options are not valid. Hence, ignored it

It was a mistake that i put in under 13 of age can you put it for 27

Answers

Answer:

ill try to help you :)

Explanation:

A simple Rankine cycle uses water as the working fluid. The boiler operates at 6000 kPa and the condenser at 50 kPa. At the entrance of the turbine the temperature is 450 deg C. The isentropic efficiency of the turbine is 94 percent, pressure and pump losses are negligible, and the water in the condenser is subcooled by 6.3 degC. The boiler is sized for a mass flow rate of 20 kg/s. Determine the rate at which heat is added in the boiler, the power required to operate the pumps, the net power produced by the cycle, and the thermal efficiency.

Answers

Answer:

the rate at which heat is added in the boiler = 59597.4 kW

the power required to operate the pumps = 122.57 kW

The net power produced by the cycle = 17925 kW.

The thermal efficiency = 30%.

Explanation:

The specific enthalpy of saturated liquid is equal to the enthalpy of the first point which is equal to 314 kJ/ kg.

The second enthalpy is calculated from the pump work. Therefore, the second enthalpy = first enthalpy point + specific volume of water [ the pressure of the boiler - the pressure of the condenser].

The second enthalpy = 314 + 0.00103 [ 6000 - 50 ] = 320.13 kJ/kg.

The specific enthalpy for the third point = 3300 kJ/kg.

Therefore, the rate at which heat is added in the boiler = 20 × [3300 - 320.13] = 59597.4 kW.

The rate at which heat is added in the boiler = 59597.4 kW.

Also, the power required to operate the pumps = 20 × 0.00103 [6000 - 50] = 122.57 kW.

The power produced by the turbine = 20 [ 300 - ( the fourth enthalpy value)].

The fourth enthalpy value = 3300 - 0.94 [ 3300 - 2340] = 2397.6 kJ/kg

Thus, the power produced by the turbine = 20 [ 300 - 2397.6] = 18048 kW.

The power produced by the turbine = 18048 kW.

The net power produced = 18048 + 122.57 = 17925 kW.

The thermal efficiency = [net power produced] / [the rate at which heat is added in the boiler].

The thermal efficiency = 17925/ 59597.4 = 30%.

Use the EXTENDED EUCLIDEAN ALGORITHM to compute the following multiplicative inverses:

a) 17-1 mod 101

b) 357-1 mod 1234

c) 3125-1 mod 9987

Answers

Using the EXTENDED EUCLIDEAN ALGORITHM to compute the following multiplicative inverses:

How to solve

a) 6

because 17*6 mod 101 = 102 mod 101 = 1

b) 1075

because 357*1075 mod 1234 = 383775 mod 1234 = 1

c) 1844

because 3125*1844 mod 9987 = 5762500 mod 9987 = 1