Answer:
(a) 774.529 kJ/kg
(b) Approximately 61.2%
(c) 96.816 kPa
(d) The maximum in the cycle temperature is 2655.3 K
Explanation:
(a)The temperature T₂ = T₁ × r^(k - 1)
∴ T₂ = 300 × 9^(1.4 - 1) = 772.467 K
P₂ = P₁×r×T₂/T₁ = 100 × 8 × 772.467/300 = 2059.912 kPa
W₁₂ = Cv × (T₁ - T₂) = 0.717*(300 - 772.467) ≈ -338.76 kJ/kg
The heat added = q₂₃ = 1350 kJ/kg = Cv × (T₃ - T₂) = 0.717*(T₃- 772.467)
1350/0.717 = T₃- 772.467
T₃ = 1350/0.717 + 772.467 = 2655.3 K
T₄ = T₃ × (1/r)^(k - 1) = 2655.3 × (1/9)^(1.4 - 1) = 1102.596 K
W₃₄ = Cv×(T₃ - T₄) = 0.717 × (2655.3 - 1102.596) ≈ 1113.289 kJ/kg
The net work = W₁₂ + W₃₄ = -338.76 + 1113.289 = 774.529 kJ/kg
(b) The thermal efficiency, [tex]\eta _{th}[/tex] = 1 - T₁/T₂ = (1 - 300/772.467) × 100 ≈ 61.2%
(c) The Mean Effective Pressure, MEP = (Net work)/Displacement Volume)
For unity clearance, volume, we have;
MEP = 774.529/(9 - 1) = 96.816 kPa
(d) The maximum temperature, occur at T₃ = 2655.3 K.
Scale drawings provide an engineer with the opportunity to explore different aspects of a design.
True
False
Answer:
True
Explanation:
Select the creative imaging fields that require knowledge of programming.
computer engineer
video game designer
animator
video game programmer
video game artist
graphic designer
I think:
— video game programmer— video game designer— computer engineerPlease tell me if it's right.
Force is the cause of a velocity change
The answer is true. hope this helped
Answer:
Forces affect how objects move. They may cause motion; they may also slow, stop, or change the direction of motion of an object that is already moving. Since force cause changes in the speed or direction of an object, we can say that forces cause changes in velocity. Remember that acceleration is a change in velocity
Drag each label to the correct location on the table. Match to identify permanent and temporary structures.
Answer:
Permanent Structures:
Motel
Mall
Refinery
Temporary Structures:
Kiosk
Marquee
Exhibition Stand
Explanation: Got a 100 percent on the test
what is your favorite concole?
Answer:
Ps4
Explanation:
Answer:
ps4
Explanation:
Roundabouts have significantly lower crash and fatality rates than intersections.
O True
O False
Answer:
True
Explanation:
Apparently roundabouts reduce injury crashes by about 75%
What does it mean if a manufacturing company "retools"?
Answer:
It mean to equip more tools.
Explanation:
I hope this helps.
Answer:
When a manufacturing company "Retools", they simply are restocking in tools, organizing their workspace, and modifying or changing anything that needs to be changed.
2. Explain how fossil fuels are form
Answer:
Found from interent:
Explanation:
What characteristics are common to public schools? Check all that apply. require tuition to attend run by a non-government group free to students through grade 12 higher tuition than a private school run by the government funded by the government
Answer:
c, e, f.
Explanation:
I took the test
The characteristics that are common to public schools, are free to students through grade 12, run by the government, funded by the government. The correct options are B, C, and D.
What are public schools?A public school is one that is supported by the government through taxes. Attending a primary or secondary public school is free for all students.
A more educated population has lower unemployment, lower reliance on government assistance programs, and higher tax revenue.
Education is also important in reducing crime, improving public health, and increasing political and civic engagement.
A private school is self-sufficient and generates its own funding from sources such as student tuition, private grants, and endowments. A public school is funded by the government, and all students attend for free.
The characteristics that are shared by public schools are that they are free for students up to grade 12, are run by the government, and are funded by the government.
Thus, B, C, and D are correct options.
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Which of the following is an example of an observation?
The monkey is eight years old.
The monkey weighs twenty pounds.
The monkey is brown.
The monkey is two feet tall.
You should read the lifts safety and operating instructions only if you havent used the automotive lift before
In modern gasoline injection systems, where does the fuel injector spray gasoline ?
Answer:
tube
Explanation:
Briefly explain why someone would choose a career in the geologic sciences, with at least three reasons.
Answer:
Someone could chose the career of being a geologic scientist because they can discover new things about the world.And find new things about it that wearnt discovered previously.
Explanation:
New species
New cures
New lands
Answer:
The correct answer would include that there is a need for viable energy sources, but the techniques for mining them are not yet perfected.
Explanation:
Because of this, there is much room for improvement. This is a currently growing field with high incomes possible. There is a need to find better, safer ways to clean up spills. Less dangerous ways can be designed to make such tasks more efficient.
Which option identifies what engineers will do to help in the following scenario?
After an explosion on an offshore drilling rig, engineers were called in to take action.
A) Engineers will work to design a rig that will not allow methane to escape and cause fires.
B)Engineers will create a large container to keep the flowing petroleum from entering the water.
C)Engineers will expand the drilling to divert the methane gas.
D)Engineers will work to design a system that will cap off the pipeline and stop the flow of petroleum.
Answer:
D is Correct
Explanation:
D) Engineers will work to design a system that will cap off the pipeline and stop the flow of petroleum.
In the scenario given, an explosion has occurred on an offshore drilling rig, indicating that there has been a catastrophic failure in the system. The first priority in such a situation would be to contain and stop the flow of petroleum to prevent further damage to the environment and ensure safety.
Engineers would be called in to take immediate action and design a system that will cap off the pipeline and stop the flow of petroleum. This might involve designing and installing valves or other mechanical devices that can shut off the flow of petroleum.
Option A is incorrect because preventing methane from escaping and causing fires is not the immediate priority in this situation. Option B is also incorrect because the immediate priority is to stop the flow of petroleum, not to contain it. Option C is not a feasible solution as diverting methane gas would not address the immediate issue of stopping the flow of petroleum.
Engineers will work to design a rig that will not allow methane to escape and cause fires. Thus, the correct option is A.
Thus, An engineer solves issues using math, science, and technology. Engineering is all around us, enhancing the ways that we work, travel, communicate, maintain our health, and have fun.
Engineers transform scientific information into technology, which they subsequently transform into a practical solution or innovation.
All engineers experience a sense of pride and well-being after successfully completing a challenging assignment. Making, designing, and manufacturing valuable goods and services for other people is a career that will enrich your life.
Thus, The ideal option is A.
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Name three things you can find with a level in construction and explain why they are Important
Answer:
Construction Management is a Huge Job :
As a part of your construction manager training, you will need to know how to take control of the entire project.
Compliance is Required :
Every state has certain rules that need to be adhered to if the project is to be carried through properly.
Managing Employees Can Be Difficult
When you are a basic construction worker with the yellow hat that we mentioned, you are only responsible for yourself.
Explanation: