ME 125NT Intro to Nanotechnology Due: 4/8/2008 Problem 4.9 in book Explain why smaller molecules tend to have lower boiling points. Problem 4.11 in book In BACK-OF-THE-ENVELOPE 4.2, we determined the van der Waals attractive force between a pair of h
ME 125NT Intro to Nanotechnology Due: 4/22/2008 HOMEWORK #3 SOLUTIONS Problem 4.9 in book Explain why smaller molecules tend to have lower boiling points. ANSWER The smaller a molecule, the smaller the dispersive force holding the molecules together
ME 125NT Intro to Nanotechnology Due: 4/29/2008 HOMEWORK #4 Problem 5.7 in book A silicon cantilever beam is 300 m long, 100 m wide and 6 m thick. Silicon's modulus of elasticity is 110 GPa; its density is 2330 kg/m3. (a) Determine the spring constan
ME 125NT Intro to Nanotechnology Due: 4/8/2008 Homework #1 Due 4/8/2008 Essay #1 Write a 2-4 page (500-2500 word) essay on a nanotechnology company, product or technical research paper. The paper should have the following format and sections: Abstra
ME 125NT Intro to Nanotechnology Due: 4/29/2008 Solutions Set 4 Problem 5.7 in book A silicon cantilever beam is 300 m long, 100 m wide and 6 m thick. Silicon's modulus of elasticity is 110 GPa; its density is 2330 kg/m3. (a) Determine the spring con
ME 125NT Intro to Nanotechnology Due: 4/15/2008 Essay 1: Tackle one of the questions on page 19 of the book (re-written here for your convenience) in a 500-2500 word essay. Again the point of this essay is to just explore the world and stigmas create
ME 125NT Introduction to Nanotechnology Quiz #1 re-Take option
Question #1 (10 points): Scaling questions. Please write down as much as possible and cite your source when relevant. a. How many square nanometers is a standard piece of paper? b. How m
ME 125NT Intro to Nanotechnology Due: 4/8/2008 Problem 1: You just put 5mL of heavy cream into your 16 oz. coffee and instead of mixing them together, you just wait for all the cream to diffuse with the coffee. What is the time scale for this mixing?
ME 125NT Intro to Nanotechnology Due: 5/8/2008 Problem Set 5 Problem 6.14 in book We can look at the band structure of an element to get an idea of how many electrons per atom participate in conduction. We can also determine this number based on the
ME 125NT Intro to Nanotechnology Due: 4/8/2008 Problem Set #1 Problem #1 Write a 1-2 page essay on a nanotechnology company, product or paper. It should describe what is "Nano" about it, and how it works. Also, what are the implications of the techno
ME 125NT Intro to Nanotechnology Due: 5/15/2008 Solution Set 6 Problem 7.4 in book A free electron in a block of gold has an energy of 3.810-21 J. What is the approximate temperature (C) of the block? ANSWER E k BT E T 273 K kB
That's 0C.
Problem
ME 125NT Intro to Nanotechnology Due: 5/8/2008 Solution Set 5 Problem 6.14 in book We can look at the band structure of an element to get an idea of how many electrons per atom participate in conduction. We can also determine this number based on the
Homework #1
ME125BP
Due Wednesday, April 6 in class
Define parameters per the following drawing:
Problem 1.
Consider the above van on level ground having the following properties:
Wf = 1520lbs
Wr = 1150
h = 24.5inches
hh = 14inches
L = 120inches
a) find b
Homework #2
ME125BP
Due Wednesday, April 13 in class
Problem 1. Show that lb-sec2/in is a mass unit.
Problem 2. In class, we derived the Fxmax equation, the maximum acceleration traction
force (equation 2-23 in the text). Fill in the steps that I skipped
Homework #3
ME125BP
Due Wednesday, April 27 in homework box
Problem 1. Reference to Figure 2.9 on page 32. Assume that the dynamometer brake
produces 3 ft-lbs of torque per psi of Mean Effective Pressure.
a) At what torque and speed is the engine most fue
ME125BP Homework #4
Due Friday, May 18
Problem 1. Consider a -car suspension model with the following parameters:
M = 250kg
M = 15kg
Kt = 100,000 N/m
a) Derive Z(s)/Zr(s) (Hint: replace d/dt with s in the differential equations and assume
initial conditio
ME125BP Homework #5
Due Friday, May 27
Problem 1. Equation 6-14 is derived from Figure 6.4 in the text. Fill in the details of the
derivation.
Problem 2. Figure 6.11 shows a convex curve relating lateral force to vertical force on
tires. What would be the
Lecture 1 Supplementary Material
ME125NT Prof. Sumita Pennathur Spring Quarter 2008
4/1/2008 1
What is Nano?
All the prefixes are there, it is up to us to use them. Zoom Video
4/1/2008
2
Who Is Nano?
A quote from Richard Smalley, the discover
ME 125NT Intro to Nanotechnology Due: 5/27/2008 Solution Set 7 Problem 8.22 in book Solar radiation in the wavelength range of 290-400 nm burns our skin. (a) What range of the electromagnetic spectrum do these wavelengths correspond to? (b) A batch o
ME 125NT Intro to Nanotechnology Due: 5/15/2008 Problem Set 6 Problem 7.4 in book A free electron in a block of gold has an energy of 3.810-21 J. What is the approximate temperature (C) of the block?
Problem 7.10 in book A copper wire 3 m in diamete