Q1. (20 marks) Entropy Analysis of the heat engine: consider a 35% efficient heat engine operating between a large, high- temperature reservoir at 1000 K (727 °C) and a large, cold reservoir at 308 K (35°C). If it withdraws 1.2 MJ/s from the high-temperature reservoir, what would be the rate of loss of entropy from that reservoir and what would be the rate of gain by the low-temperature reservoir? (4 marks) b. Express the work done by the engine in watts. (3 marks) What would be the total entropy gain of the system? d. Determine Carnot efficiency and recalculate the a, b, and c, accordingly. ​

Answers

Answer 1

With a high temperature of 1000k and a cold temperature of 308K, The rate of gain for the high reservoir would be 780 kj/s.

A. η = 35%

[tex]\frac{w}{Q1} = \frac{35}{100}[/tex]

W = [tex]1.2*\frac{35}{100}*1000kj/s[/tex]

W = 420 kj/s

Q2 = Q1-W

= 1200-420

= 780 kJ/S

What is the workdone by this engine?

B. W = 420 kj/s

= 420x1000 w

= 4.2x10⁵W

The work done is 4.2x10⁵W

c. 780/308 - 1200/1000

= 2.532 - 1.2

= 1.332kj

The total enthropy gain is 1.332kj

D. Q1 = 1200

T1 = 1000

[tex]\frac{1200}{1000} =\frac{Q2}{308} \\\\Q2 = 369.6 KJ[/tex]

Cournot efficiency = W/Q1

= 1200 - 369.6/1200

= 69.2 percent

change in s is zero for the reversible heat engine.

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To find how many ways, you must simply multiply 10 tasks and 5 exercises

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The sounds heard during the first phase of blood-pressure measurement are called the Korotkoff sounds.

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Joe maylan an employee of acme company has been sent to do some work in the highland company's main lobby. This job will take two days. Which type of pass should joe be given?

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The type of Pass that Joe Maylan should be given is called; Temporary Pass

What is temporary pass?

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Calculate the acceleration of a 2000kg single engine airlane just before take off when the thrust of the engine is 500n?

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Answer:

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The definition of gross axle weight rating is to give give out the weight the axle of a vehicle can support.

During the design of spherical pressure vessel for space programs, a primary criterion is the mass of the vessel (which determines how much it costs to put it into the orbit). Given the stress in a thin walled spherical vessel is tensile and given by:

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Tensile stress in a thin wall spherical shell is given by

σ = ( p r ) /2t

Tensile stress

This is the type of stress that involves pulling out. it is the opposite of compressive stress.

The tensile stress, σ  at the circumference of the shell is the hoop stress. The value equals that of pressure acting on the area.

Therefore:

σ * 2πr * t = p * πr^2

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A glass of water with a mass of 0.45kg at 20∘C is to be cooled to 0∘C by dropping ice cubes at 0∘C into it. The latent heat of fusion of ice is 334kJ/kg, and the specific heat of water is 4.18kJ/kg⋅∘C. The amount of ice that needs to be added is.

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By using the concept of heat transfer, we need to add 0.045kg or 45g of ice to the glass of water to cool it from 20∘C to 0∘C.

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What is the difference between aerospace and aeronautical engineering

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Answer:

Aerospace engineering is a broader subject that includes both aircraft and spacecraft studies. Aeronautical engineering focuses more on aircraft design and construction that flies within the Earth's atmosphere.

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Aerospace engineering is a vast topic that involves research on both airplanes and spacecraft, further explained in the following paragraph.

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The largest tensile force that can be applied to the cables given a rod with diameter 1.5 is 2013.15lb

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Answer:

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He could put up advertisements all over the town and pay a few websites or search engines to have his company and ads be more common. He should also use some designs and make his company's sign very adequate.

on to Hand Tools - Scored Items
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When working above the when working above the ground, what should be used to connect all tools to prevent injury to others or damage to the work below?

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A lanyard should be used to connect all tools to prevent injury to others or damage to the work below when working above the ground.

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According to the Occupational Safety and Health Administration (OSHA), a lanyard should be used by workers to connect all tools, so as to prevent injury to other workers or even a damage to the work below, especially when working above the ground.

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Answer:

The rotary engine works on the same basic principle as the piston engine: combustion in the power plant releases energy to power the vehicle. However, the delivery system in the rotary engine is wholly unique. The piston engine performs four key operations: intake, compression, combustion, and exhaust.

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Answer:

The purpose of networking is to make new friends, industry acquaintances, and even business partners.

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Structural Engineers create drawings and specifications, perform calculations, review the work of other engineers, write reports and evaluations, and observe construction sites. A Professional Engineer's license is required in order to practice Structural Engineering.

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answer explanation:Basically, the Carnot cycle is turning a heat differential into mechanical energy, then using mechanical energy to recreate the heat differential. A heat pump only turns mechanical energy into a heat differential. It exchanges the gas being compressed on an ongoing basis and does not extract mechanical energy from it, this continuous loss of mechanical energy input is what allows continuous generation of a heat differential.

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Darron loves his career because it mostly fits in with his lifestyle. He likes how he is able to make a lot of money and
stay very busy while at work. He also likes that he travels a lot and gets to see new places. He thinks that one of the
reasons he is successful is that he enjoys the competition in his career that some people would find stressful.
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Answer:

A

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He says he loves work, but wants more time with his family, so this is in conflict with some of his other desires.

Construction engineering does not have much to do with design.
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i’m pretty sure it is false .

Pouring molten aluminum into a mold and allowing it to cool forms:
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Hi :)

The answer is B. A cast part

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Molten material is then poured into a mould cavity that takes the form of the finished part. The molten material then cools, with heat generally until it solidifies into the desired shape.

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Answer:

I would say only A

Explanation:

steering dampeners are applied to heavy-duty and off-road vehicles in order to help stabilize and balance out your steering in rough terrain. luxury cars won't have them because, well, they are cars, and cars are not used for off-roading. trucks and SUVs and sometimes vans are though, which makes sense more than just a random luxury car with dampeners just sitting there for no reason at all when heavy-duty vehicles need them more than the car.

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