ES10 S2017 Homework #3 Solution
1. [10pt] Calculate the number of vacancies per cubic meter in iron at 850C. The activation energy for vacancy
formation is 1.08 eV/atom. The density and atomic weight for Fe are 7.65 g/cm3 and 55.85 g/mol, respectively. Th
ES10 S17 Supplementary Problem Set #3 Solution
1. Two previously undeformed cylindrical specimens of an alloy are to be strain hardened by reducing their
cross-sectional areas while maintaining their circular cross sections. For one specimen, the initial
ES10 S2017 Homework #3 Due 10:30am Wednesday March 15th
1. [10pt] Calculate the number of vacancies per cubic meter in iron at 850C. The activation energy for vacancy
formation is 1.08 eV/atom. The density and atomic weight for Fe are 7.65 g/cm3 and 55.85
ES10 S17 Homework #4
Due 10:30am Wednesday March 29th, 2017
1. [15pts] Determine the carburizing time necessary to achieve a carbon concentration of 0.45 wt% at a position 2
mm into an ironcarbon alloy that initially contains 0.20 wt% C. The surface conce
ES10 S17 Supplementary Problem Set #3
1. Two previously undeformed cylindrical specimens of an alloy are to be strain hardened by reducing their cross-sectional
areas while maintaining their circular cross sections. For one specimen, the initial and defor
Course Syllabus v3 March 15th, 2017
ES 10 Introduction to Materials Science and Engineering S17
Textbook:
Fundamentals of Materials Science and Engineering,
an Integrated Approach 5th ed. by W. D. Callister and David G. Rethwisch, Wiley
Instructor:
Hyunmi
ES10 S17 Homework #5 Chapters 8 & 10
Due 10:30am Monday April 24, 2017
1. [10pts] A single-crystalline zinc rod is oriented for a tensile test such that its slip plane normal (i.e. ) makes an
angle of 65 with the tensile axis. Three possible slip directio
ES10 S17 Homework #2 Due 10:30am Wednesday February 15th 2017
1.
[15pts] List the point coordinates of the titanium, barium, and oxygen ions for a unit cell of the perovskite crystal
structure (Figure 3.10 on page 62, also in the Lecture PPT).
2.
[5pts] F
ES10 S17 HW #1 Due 10:30am Wednesday February 8th
1. [25pts] Compute the percent ionic character of the interatomic bonds for the following compounds: TiO2, ZnTe,
CsCl, and InSb. Which one of the four has the most covalent bonding character?
2. [5pts] If
ES-2 HW 2: Logic and vectors
Overview
In this homework youll gain experience writing scripts and using logic statements. Youll also start
on a trajectory project that is a theme going up through HW8. Some new Matlab functions you
will use in this homework
2017 ES4 Introduction to Digital Logic Circuits
Class webpage: www.ece.tufts.edu/~karen/ES4
A Link to the Trunk site will also be emailed to all enrolled students
Descriptions and Goals:
Welcome to the world of digital design! Today, every electronic devi
Experiment 1: Introduction to Digital Logic Design and VHDL
Purpose: This experiment will familiarize you with the process of designing and implementing with
digital logic gates. The logic gates are packaged as a group on chips. Each chip has manufacturer
ES4 Homework #5
Professor: Dr. Karen Panetta
Assigned February 21, 2017
DUE: February 27, 2017 Please show all work for credit.
1) a) Using a clearly LABELED K-MAP minimize the following function. F(wxyz=
(1,2,3,6,7,9,11,13,14,15). Show the output for the
ES4 Homework #3
Assigned February 6, 2017
Professor: Dr. Karen Panetta
DUE: February 13, 2017. Please show all work for credit. Please note for this assignment, your
schematics must use visio software or other circuit layout software. No hand drawn
schema
ES4 Homework #4
Professor: Dr. Karen Panetta
Assigned February 13, 2017
DUE: February 22, 2017 Please show all work for credit. Please note for this assignment, your
schematics must use visio software or other circuit layout software. No hand drawn
schema
ES4 Homework #1
Professor: Dr. Karen Panetta
Assigned January 23, 2017
DUE: January 30, 2017 Please show all work for credit.
1) What are the primary differences between time sharing of a CPU vs Cloud Computing?
2) Give 4 examples of digital logic conside
Tufts University Department of Electrical and Computer Engineering
ES3 Introduction to Electrical Systems Fall 2015
Homework #10 Solutions
Problem 1 (10 points): The initial voltage across the capacitor shown in Figure 1 is vC(0+) = 0. At t=0 the
switch c
Tufts University
Department of Electrical and Computer Engineering
ES3 Introduction to Electrical Systems
Homework #6 Solutions
Problem 1 (4 points): A sinusoidal voltage v (t) has an rms value of 120V, a period of
25s, and reaches a positive peak at t =
Tufts University
Department of Electrical and Computer Engineering
E83 Introduction to Electrical Systems
Homework #4
Problem 1 (10 points): We can model a certain battery using a Tnvenin equivalent model,
consisting of a voltage source Vt in series with
Tufts University
Department of Electrical and Computer Engineering
ES3 Introduction to Electrical Systems
Homework #3
Problem 1 (4 points): Use the voltage-division principle to calculate v in Fig. 1.
Figure 1. Circuit for Problem 1.
Figure 2. Circuit
Tufts University
Department of Electrical and Computer Engineering
ES3 Introduction to Electrical Systems
Homework #2
Figure 1. Circuit for Problems 1, 2, and 3.
Problem 1 (6 points): Use KCL to find the values of ib, ic, and ie for the circuit in F
Tufts University
Department of Electrical and Computer Engineering
ES3 Introduction to Electrical Systems
Homework #3 Solutions
Problem 1 (4 points): Use the voltage-division principle to calculate v in Fig. 1.
Solution: The two 10 resistors are in parall
Tufts University
Department of Electrical and Computer Engineering
ES3 Introduction to Electrical Systems Fall 2015
Homework #7
Figure 1. Circuit for Problem 1.
Problem 1 (20 points): Suppose we have a circuit for which the output voltage is t