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Pennsylvania State University *
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Course
102
Subject
Mechanical Engineering
Date
Jan 9, 2024
Type
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8
Uploaded by MagistrateMorning4904
1/23/23, 9:39 PM
Lesson 3 - Quiz: EGEE 102 (SP23): Energy Conservation for Environmental Protection
https://psu.instructure.com/courses/2224925/quizzes/4674334
1/8
Lesson 3 - Quiz
Due
Jan 28 at 11:59pm
Points
25
Questions
13
Available
Jan 23 at 12am - Jan 28 at 11:59pm
Time Limit
20 Minutes
Allowed Attempts
2
Instructions
Attempt History
Attempt
Time
Score
LATEST
Attempt 1
10 minutes
22 out of 25
Correct answers will be available on Jan 30 at 12am.
Score for this attempt:
22
out of 25
Submitted Jan 23 at 9:38pm
This attempt took 10 minutes.
Remember that once you start the quiz, you cannot stop the timer. If you leave the quiz, the timer
keeps running. You must finish in 20 minutes.
Feedback for this Quiz (along with your responses and the correct answers) will be made available
after the deadline for this Quiz.
Take the Quiz Again
1 / 1 pts
Question 1
Which one of the following is true about energy conversion devices?
Total Energy Input = Useful Energy Output + Energy Dissipated to the
surroundings
Total Energy Input = Useful Energy Output
1/23/23, 9:39 PM
Lesson 3 - Quiz: EGEE 102 (SP23): Energy Conservation for Environmental Protection
https://psu.instructure.com/courses/2224925/quizzes/4674334
2/8
Total Energy Input = Energy Dissipated to the surroundings
Total Energy Input = Efficiency X Total Energy Output
Total energy = useful energy + waste energy. Refer to section 3.2:
Energy Conversion Devices.
1 / 1 pts
Question 2
Which one of the following devices is least energy efficient?
(1 point)
Power plant
Electric motor
Light bulb
Typically a power plant has an efficiency of 35%, and an electric
motor an efficiency of 90%. An incandescent electric bulb has an
efficiency of 5% and fluorescent light bulbs have an efficiency of
about 20%. Refer to section 3.3: Typical Efficiencies of Day to Day
Devices.
1 / 1 pts
Question 3
What is the form of useful energy output in the case of a computer
screen?
1/23/23, 9:39 PM
Lesson 3 - Quiz: EGEE 102 (SP23): Energy Conservation for Environmental Protection
https://psu.instructure.com/courses/2224925/quizzes/4674334
3/8
Radiation
Mechanical
Thermal or Heat
Chemical
A computer screen converts electrical energy into radiation (the
pictures and text that we see on the computer screen). Refer to
section 3.2: Energy Conversion Devices.
1 / 1 pts
Question 4
What is the primary form of useful energy output in the case of a car?
Mechanical
Thermal or Heat
Radiation
Chemical
A car converts chemical energy from the burning of fuel into
mechanical energy (rotation of wheels). Refer to section 3.2:
Energy Conversion Devices.
1 / 1 pts
Question 5
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1/23/23, 9:39 PM
Lesson 3 - Quiz: EGEE 102 (SP23): Energy Conservation for Environmental Protection
https://psu.instructure.com/courses/2224925/quizzes/4674334
4/8
What is the form of useful energy output in the case of a TV?
Radiation
Mechanical
Thermal or Heat
Chemical
A TV converts electrical energy into radiation (the pictures that we
see). Refer to section 3.2: Energy Conversion Devices.
1 / 1 pts
Question 6
Energy can be created when we burn fossil fuels.
(1 point)
True
False
First law of thermodynamics states that Energy output must be
equal to the input. It cannot be created.
2 / 2 pts
Question 7
A heat engine converts thermal energy into what type of energy?
1/23/23, 9:39 PM
Lesson 3 - Quiz: EGEE 102 (SP23): Energy Conservation for Environmental Protection
https://psu.instructure.com/courses/2224925/quizzes/4674334
5/8
Mechanical
Thermal
Chemical
Electrical
A heat engine is defined as a device that converts heat energy into
mechanical energy.
2 / 2 pts
Question 8
What is the most common by product of fossil fuel-based energy
conversion processes?
Light
Heat
Sound
Motion
Most energy conversion processes produce heat as a by product.
Refer to section 3.2: Energy Conversion Devices.
3 / 3 pts
Question 9
1/23/23, 9:39 PM
Lesson 3 - Quiz: EGEE 102 (SP23): Energy Conservation for Environmental Protection
https://psu.instructure.com/courses/2224925/quizzes/4674334
6/8
If the energy input of a system is 115 calories and its output is 51 calories,
what is the efficiency of the system? (Answer units: %)
44.35
System Efficiency = (useful energy output) / (total energy input) *
100. Please refer to section: Efficiency of Energy Conversion
Devices.
0 / 3 pts
Question 10
Incorrect
Incorrect
The Carnot efficiency of the automobile engine is 57%, and the flame
temperature is 558
℃
, what is the exhaust temperature (
℃
)? ? Answer to
two decimal places, do not include unit symbols.
357.33
Use the Carnot efficiency formula and temperatures in Kelvin.
3 / 3 pts
Question 11
The flame temperature in an automobile engine is 1,315 °F, and the
exhaust is emitted at 257 °F. What is the Carnot efficiency of the engine?
(Answer with units of %. i.e. 30 not 0.3. you do not need to provide the %)
59.62
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1/23/23, 9:39 PM
Lesson 3 - Quiz: EGEE 102 (SP23): Energy Conservation for Environmental Protection
https://psu.instructure.com/courses/2224925/quizzes/4674334
7/8
Use the Carnot efficiency formula and temperatures in Kelvin.
Please refer to section covering The Carnot Efficiency.
3 / 3 pts
Question 12
The useful output from a heat engine is 212 cal. The energy that is wasted
is 4,235 J. What is the Carnot efficiency of the engine? (Answer with units
of %. i.e. 30 not 0.3. you do not need to provide the %)
17.32
Efficiency = ((useful energy output) / (useful energy output + waste
energy output))*100. Note: Use units consistently. Please refer the
section of the Efficiency of Energy Conversion Devices.
3 / 3 pts
Question 13
The following step efficiencies apply to the use of gasoline in a car: Crude
production: 95.9%, Refining 80.5%, Transportation 93.4%, Engine
efficiency 20%. What is the total efficiency of the process? (Answer units:
%, i.e. input 10 not 0.1. Be sure to exclude the % as Canvas does not
accept symbols)
14.42
1/23/23, 9:39 PM
Lesson 3 - Quiz: EGEE 102 (SP23): Energy Conservation for Environmental Protection
https://psu.instructure.com/courses/2224925/quizzes/4674334
8/8
Overall Efficiency of a system is the product of step efficiencies.
Please refer to section 3.9: Calculating Overall Efficiency.
Quiz Score:
22
out of 25
Related Questions
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Determine the magnitudes of the velocity and acceleration of the second driver.
Express your two answers, separated by a comma, to two significant figures in meters per second and meters per second squared.
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Part A - Determining the magnitudes of the velocity and acceleration of the first driver
Determine the magnitudes of the velocity and acceleration of the first driver.
Express your two answers, separated by a comma, to two significant figures in meters per second and meters per second squared.
► View Available Hint(s)
ΨΕ ΑΣΦ 11 vec S
?
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m/s m/s²
Submit
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X Incorrect; Try Again; 3 attempts remaining
4
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Determine the magnitudes of the velocity and acceleration of the second driver.
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64.7, 14.5
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Don't use chatgpt will upvote
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I need problems 6 and 7 solved.
I got it solved on 2 different occasions and it is not worded correctly.
NOTE: Problem 1 is an example of how it should be answered. Below are 2 seperate links to same question asked and once again it was not answered correctly. 1. https://www.bartleby.com/questions-and-answers/it-vivch-print-reading-for-industry-228-class-date-name-review-activity-112-for-each-local-note-or-c/cadc3f7b-2c2f-4471-842b-5a84bf505857
2. https://www.bartleby.com/questions-and-answers/it-vivch-print-reading-for-industry-228-class-date-name-review-activity-112-for-each-local-note-or-c/bd5390f0-3eb6-41ff-81e2-8675809dfab1
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I need help answering these 3 questions ASAP!!! Due date is 11:59
Thank youuuuu
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Learning Goal:
To use transformation equations to calculate the plane state of stress in a rotated coordinate system.
The normal and shear stresses for a state of stress depend on the orientation of the axes. If the stresses are
given in one coordinate system (Figure 1), the equivalent stresses in a rotated coordinate system (Figure 2) can
be calculated using a set of transformation equations. Both sets of stresses describe the same state of stress.
In order to use the transformation equations, a sign convention must be chosen for the normal stresses, shear
stresses, and the rotation angle. For the equations below, a positive normal stress acts outward on a face. A
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positive direction for the rotation is also shown in the second figure.
The stresses in the rotated coordinate system are given by the following equations:
στ
σy
+
cos 20+Try sin 20
2
2
σετ συ
=
σy'
cos 20-Try…
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Statics Problem !!!
Help me Part A , Part B , Part C!!!! Answer it this Problem Correctly!! Please give correct Solution
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Parts a and b were answered in a previous question, part c was unanswered this is the entire question :)
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Figure
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Per Bartleby honor code only 3 subparts of a question can be answered per submission. I have submitted 10, 11, 12, and 13 previously. Please answer 14, 15, 16
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12:53
⚫ ccdc.instructure.com
Writing Assignment 3
6/23/2024
Missing 10 Points Possible
•))
Attempt 1
In Progress
NEXT UP: Submit Assignment
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Imagine you are responsible for setting up a
community service program in your city. What
kind of program would you start? Who would it
serve? Would there be volunteers? Who would
they be? What would you hope to accomplish?
Be specific.
Write at least three paragraphs answering these
questions.
Reminders:
1. This is a high level assignment and should be
completed with multiple paragraphs, at least
3.
2. A paragraph is at least 4 sentences, so this
assignment should be at least 12 sentences in
total (4 per paragraph)
>
<
Submit Assignment
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Enginooring Mochanics: Sutca (1
Fint Scitester, Firt yoat, Academic yer 2020-2021
Deputtane of Civil Engnoeg
Callege of Engincenng
Lasenaty ut Mis
Cm link on Miodle
Instructor: Dr. Murtada Abass
Mid-term Examination of E113 1 year
2020-2021
Date: March 5, 2021
Time: 20 Minutes
Answer one question only which is
assigned for you only
Your Question is assigned via Mloodle
in Ouizzes Section
Your answer to the question will be
submitted via Zoom
Question: Determine the reactions of the
truss shown in the Figure,
5 KN
lom
A
جميلة محمد
15
کشيش
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IDM
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.com question/22816263
rch for an answer to any question...
it works
For parents For teachers
Honor code
16 nours agO• Chemistry Hign Scnoo1
You are currently in a stable orbit 9000 km
(1km=1000m) from the center of planet Proxima
Centauri B.
According to the calculations done by NASA, Planet Proxima Centauri B has
a mass of approximately 7.6x10^24kg.
Based on fuel consumption and expected material aboard the ship, your
colony ship lander has a mass of approximately 1.1x10^5 kg.
1. Using Newton's Law of Universal Gravitation, determine what the force of
gravity on your ship at that orbit be using the early measurements
2.Using Newton's second law determine the acceleration of your lander due
to gravity
3.Upon arrival, you measure the actual force of gravity to be 6x10^5 N,which
ic difforent from vourcalclated vauein cuection 1 ldentify 2cnocific
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