Math Homework

# Consider the thermodynamic efficiency of a Diesel engine.

Customer Question
Using equation (2.73) of your textbook...
Consider the thermodynamic efficiency of a Diesel engine. Using equation (2.73) of your
textbook, plot the efficiency of this type of engine for injection ratios ρ between 1and 5
(incrementing by 1) at compression ratios ε of 18, 20, 22, and 24. Note that this is ηth vs ρ
plot at the stated ε values. Describe your observations. Use MATLAB to plot the graphs.
Submitted: 2 years ago.Category: Math Homework
Show More
Show Less
Customer reply replied 2 years ago
1- 1/(k ε^k(rho^(k-1)/rho-1)) is equation 2.73
2/4/2016
Math Tutor or Teacher: Ryan, Engineer replied 2 years ago
Ryan, Engineer
Category: Math Homework
Satisfied Customers: 9,181
Experience: B.S. in Civil Engineering
Verified

Hi,

Thank you for using the site. I'm sorry that you haven't received any reply until now. It seems that your question was initially placed in a different category, and has only recently been moved to the Math category.

I'll be happy to help you with this, but there are a couple of issues that need to be resolved first.

To begin with, I do not have access to MATLAB. I can produce the graphs, just not with MATLAB. If using MATLAB is an absolute requirement from your instructor, then I won't be able to help with this.

Secondly, assuming that a graphing utility other than MATLAB is acceptable, I need you to clarify the equation that needs to be graphed. The text representation that was included in your earlier posting could be interpreted a couple of different ways. Please review the document at the link below and let me know which (if either) of the two equations shown matches with Equation 2.73 in your text. If it is neither, is there a way that you could take a picture of the equation in your textbook and post that?

Equations

Finally, can you describe the desired results? By that, I mean, there are 5 different values of rho and 4 different values of the compression ratio. Is the goal to have:

1) all combinations of rho and the compression ratio on one graph, (i.e. one graph with 20 curves plotted on it), or

2) a separate graph for each value of rho, with each graph showing a curve for each value of the compression ratio (i.e. four curves on each graph), or

3) a separate graph for each value of the compression ratio, with each graph showing a curve for each value of rho (i.e five curves on each graph)

I look forward to hearing from you.

Regards,

Ryan

Customer reply replied 2 years ago
no worries...i have solved it
Math Tutor or Teacher: Ryan, Engineer replied 2 years ago

Ok, no problem.

Mr. Gregory White, Master's Degree
Category: Math Homework
Satisfied Customers: 92
92 Satisfied Customers
Experience: M.A., M.S. Education / Educational Administration

Mr. Gregory White is online now

A new question is answered every 9 seconds

• Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
• Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

## What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

## Meet the Experts:

Mr. Gregory White

Master's Degree

92 satisfied customers

M.A., M.S. Education / Educational Administration

JACUSTOMER-yrynbdjl-

Master's Degree

49 satisfied customers

I have taught college Mathematics for the past 10 years.

SusanAthena

Master's Degree

41 satisfied customers

Tutor for Algebra, Geometry, Statistics. Explaining math in plain English.

Dr Arthur Rubin

Doctoral Degree

37 satisfied customers

Ph.D. in Mathematics, California Institute of Technology

mhasan420

Master's Degree

29 satisfied customers

BA Maths, Oxford

Don

Master's Degree

17 satisfied customers

M.S. Astronautical Engineering. Math/Science/Comp Tutor

Eric M.

Associate Degree

15 satisfied customers

BS and MS in computing with background in advanced statistics, combinatorics, linear algebra, calculus, and advanced algorithms.

< Previous | Next >

Related Math Homework Questions
Hello, RyanI need your help again, please, I need help with Calculating margin, determining margin potential and Production Costs. It very simple math. I will be looking forward to your reply.Thanks y… read more
Ryan
Engineer
9,181 satisfied customers
Most railroad cars are owned by individual railroad companies. When a car leaves its home​ railroad's trackage, it becomes part of a national pool of cars and can be used by other railroads. The rules… read more
Sandhya_sharma
Master\u0027s Degree
559 satisfied customers
The equation used to predict the total body weight​ (in
The equation used to predict the total body weight​ (in pounds) of a female athlete at a certain school is ModifyingAbove y with caret equals negative 110 plus 3.22 x 1 plus 1.38 x 2​, where x1 is the… read more
Ryan
Engineer
9,181 satisfied customers
Can we have a curve that balances with 2/3 of the area to
can we have a curve that balances with 2/3 of the area to the left of the mean and 1/3 of the area to the right?. Would it be skewed and what would it look like on paper? is it symmetric?… read more
GLENN
Master of Mathematics
411 satisfied customers
I don't understand this problem, it says: write an equation
I don't understand this problem, it says: write an equation that has (1, 2) as a solution.… read more
Ryan
Engineer
9,181 satisfied customers
I have a word problem that i do not understsand. Would you
i have a word problem that i do not understsand JA: The Math Tutor can help you get an A on your homework or ace your next test. Tell me more about what you need help with so we can help you best. Cus… read more
Bachelor of Education
9 satisfied customers
Read the questions in the picture I sent and solve them.
Please read the questions in the picture I sent and solve them. Read carefully directions on the paper and follow that steps.I'd like it solved by Tuesday evening.… read more
George Sibiya
PhD
286 satisfied customers
2. A manufacturing company produces two types of skis—a
2. A manufacturing company produces two types of skis—a trick ski and a slalom ski. The trick ski requires 6 hours of labor for fabricating and 1 hour of labor for finishing. The slalom ski requires 4… read more
Ryan
Engineer
9,181 satisfied customers
I am looking for maths tutor. Coursework university level. I
Dr Arthur Rubin
Doctoral Degree
Doctoral Degree
37 satisfied customers
Solve all the problems in the pictures that I sent you. And
Please solve all the problems in the pictures that I sent you. And just write down the answer on another piece of paper.… read more
Ryan
Engineer
9,181 satisfied customers
I'll need help with an STATISTICS MATH assignment RIGHT NOW!
I'll need help with an STATISTICS MATH assignment RIGHT NOW! today and the responses have to faster than a speeding bullet and correct too… read more
Bachelor of Education
9 satisfied customers
My daughter is a very good kid and an A- student at the same
My daughter is a very good kid and an A-B student at the same time has a number of after-school activities she participates in such as ballet and track. She has one class that is part of her daily cla… read more
judybailey61
Bachelors degree
196 satisfied customers
NOT GLENN Any other Expert: Please show how to solve this
NOT GLENN Any other Expert: Please show how to solve this problem step by step. "You are designing a rectangular birthday card for a friend. You want the card's length to be 1 in more than twice the c… read more
GLENN
Master of Mathematics
411 satisfied customers
1.The following cost data are provided by a simple random
1.The following cost data are provided by a simple random sample.554044304540452954324671389052404490532443403176a)Develop a point estimate of the mean cost.… read more
Ryan
Engineer
9,181 satisfied customers
Looking at a finance book and would like to you to show me
Looking at a finance book and would like to you to show me how the author correctly went from one arrangement of a formula (stated as "Original Formula" below ) to the "Final Formula"Original Formula:… read more
Bachelor of Education
9 satisfied customers
9.A school psychologist wishes to study the influence of
9.A school psychologist wishes to study the influence of three new curricula plans on the history achievement of junior high school students. Although the groups of students were selected on a fairly … read more
Ryan
Engineer
9,181 satisfied customers
Could someone help me with a 15 question quiz on Managed
Could someone help me with a 15 question quiz on Managed Care Organizations (MCO's) and Long term Care Services (LTC's)?… read more
judybailey61
Bachelors degree
196 satisfied customers
What power is dissipated by a resistor with a supply voltage
What power is dissipated by a resistor with a supply voltage of 120 volts and a current of 8 amperes?… read more
Expert
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less