EMCH 330
Homework
Fall 2017
Homework 1
Assignment date: Thursday August 31, 2017
Due date: Thursday September 7, 2017
(Please always attach this cover sheet to your completed homework assignment.
You must show the development of your solution in order to
EMCH 290
Spring 13
Final Exam
Name:_
Closed Book, 1-8x11 note sheet allowed, only specified calculator, NO ELECTRONICS.
150 min.
Objective: Students will demonstrate the ability to determine the
thermodynamic properties of simple compressible substances.
EMCH 290
Fall 14
Final Exam
Name:_
Closed Book, 1-8x11 note sheet allowed, only specified calculator, NO ELECTRONICS.
150 min.
Objective: Students will demonstrate the ability to determine the
thermodynamic properties of simple compressible substances.
Co
EMCH 290
Fall 14
Final Exam
Name:_
Closed Book, 1-8x11 note sheet allowed, only specified calculator, NO ELECTRONICS.
150 min.
Objective: Students will demonstrate the ability to determine the
thermodynamic properties of simple compressible substances.
3
EMCH 290
Spring 15
Final Exam
Name:_
Closed Book, 1-8x11 note sheet allowed, only specified calculator, NO ELECTRONICS.
150 min.
Objective: Students will demonstrate the ability to determine the
thermodynamic properties of simple compressible substances.
EMCH 201/PHYS 311
(Introduction to Application of Numerical Methods)
Instructor: Riaz Ahmed, Instructor, Department of Mechanical Engineering, USC
Assignment 3
Assignment due date: 5th October 2016
Point Possible: 50 (20 + 15 + 3 + 3 + 9)
1. Suppose you h
56. The solid 1.25-in.-diameter shaft is used to transmit the
torques applied to the gem If it is supported by smooth
bearings at A and B,wl]ich do not mist torque, determjjle the
shear stress developed in the shaft at points C and D. Indicate
the shear s
Thermo II Ch 8&9 Conceptual Review
Thermodynamics I Review & Energy Sources
-1st Law of Thermodynamics: the net work developed by a system undergoing a power or Rankine cycle
must equal the net energy added by heat transfer to the system
W net =Q
-2nd Law
EMCH 330 Fall 2015
Problem 1 1259ts1
(a) For a free vibration with viscous damping represented by the EOM
55+2gwn5c+wjx = 0
what motions can it have?
Overdamped if g>l
critically damped if g =1.
underdamped if 0< 9 <1
undamped if g=0
(b) For a forced vibr
EMCH 330
Problem 1 (25pts)
The oscillation of a ship on rough sea can be modeled as a floating cylinder on water, with the
water level itself also rising and falling in simple harmonic motion y=Y0sin(t), shown in the
figure. Ignore the friction between th
EMCH 330 Fall 2015
Problem 1 20 ts
(a) For a free undamped spring-mass system, the mass displacement is found to be
x(t) = 5cos(5tl) (m). Find:
Time for the mass to complete one Web ['26 3 [0:3 0/5 d T; 2% = :4 0" [.25
Maxunum veloc1ty_.?-L m/S de '9 *m
The 110 family direction in a cubic
crystal include all BUT? [110]
INCORRECT STATEMENT :
Ceramics and glasses tend to have
strong atomic bonding, deep bonding
energy
A differential exists in nitrogen pressure across a 5mm thick steel
wall furnace. After s
EMCH 330
Homework
Fall 2015
Homework 4
Assignment date: October 27, 2015
Due date: November 3, 2015
(Please always attach this cover sheet to your completed homework assignment.
You must show the development of your solution in order to get full points.
T
EMCH 330
Homework #3
Fall 2015
Problem 1 (25pts)
A vibrating system has the following parameters:
m = 17.5 kg
k = 70 N/cm = 7000 N/m
c = 0.7 Ns/cm = 70 Ns/m
Determine (a) the damping ratio; (b) system natural frequency; (c) damped natural frequency
(a) c
Problem 1 (20pts)
Textbook 2.6
Problem 2 (20pts)
32
1.8
1.8
1.8
32
= 1.056
1
Problem 3 (20pts)
Derive the motion equation and natural frequency of the system given below. The weight of the
bar is negligible and originally it is horizontal.
2
Problem 4 (20
Thermodynamic System Design and Analysis EMCH 394
Test 1 (take-home)
Due on 3/2/2017, Thursday before the class
Name
1. Water is the working fluid in a Rankine cycle modified to include one closed feedwater
heater and one open feedwater heater. Superheate
to pay strict attention to the units used in expressing the forces,
accelerations, material properties, and so on. The two systems of units
used in this book are the SI system (Syst`eme Internationale), and the
British Gravitational (BG) system. To avoid
careful reading of the manuscript and through the many suggestions
they made for improvement. Professor Victor Yakhot of Boston
University test-drove an early version of the book, and provided a great
deal of feedback, especially for the chapter on dimens
mass with an acceleration of 9.8 m/s2 , and it is equal to 9.8 N. In the
BG system, mass is measured in slugs, and force is measured in poundforce (lbf ). The force required to move a mass of one slug with an
acceleration of 1 f t/s2 is 1 lbf . A mass m i
interval, t, very few molecules hit this area, the force exerted by the
molecules will vary sharply with time as each individual collision is
recorded. When the area is large, so that the number of collisions on
the surface during the interval t is also l
students and researchers in fluid dynamics may be found at
http:/www.princeton.edu/gasdyn/fluids.html. In an effort to keep the
text as current as possible, additional problems, illustrations and web
resources, as well as a Corrigendum and Errata may be f
which is about 1000 times smaller than the thickness of a human hair. 8
CHAPTER 1. INTRODUCTION Figure 1.5: Molecules rebounding of a
macroscopically rough surface it acts. For instance, a thin flat plate in air
will experience no resultant force due to a
force that holds the cup onto the surface. When the walls of the
container are curved, pressure differences will also produce stresses
within the walls. In Example 1.5, we calculate the stresses produced in a
pipe wall by a uniform internal pressure. The
from regions of higher velocity will migrate to regions of lower velocity
(from A to B in Figure 1.12), interact with the surrounding molecules
and increase the local average velocity. We see that the exchange of
momentum on a microscopic level tends to s
water we drink, the rivers that flow, and the oceans that surround us,
affect us daily in the most basic sense. In engineering applications,
understanding fluid flow is necessary for the design of aircraft, ships,
cars, propulsion devices, pipe lines, air