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# Ch. 4 Solutions

Course Number: PHYS 2A, Winter 2007

College/University: UCSD

Word Count: 2368

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CHAPTER 4 PROBLEM SOLUTIONS Problem 4. j An airliner is flying at a velocity of 260 m/s , when a wind gust gives it an acceleration of 0.38 + 0.72^ m/s for a period of 24 s. (a) What is its velocity at the end of that time? (b) By what angle has it been deflected from its original course? 2 Solution 2 j j (a) Equation 4-3 gives v = 260 m/s + (0.38 + 0.72^ )(m/s )(24 s) = (269 + 17.3^) m/s. (b) Since v0 is...

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A.T. Still University - ENG - sem314
A.T. Still University - ENG - sem314
A.T. Still University - ENG - sem314
A.T. Still University - ENG - sem314
A.T. Still University - ENG - sem314
A.T. Still University - ENG - sem314
ASSIGNMENT 5 (10 marks) Complete the following questions in the text book: 8.3, 8.4 (the first part only, ie. don't have to do the comparison), and 8.9.
A.T. Still University - ENG - sem314
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A.T. Still University - ENG - sem314
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A.T. Still University - ENG - sem314
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A.T. Still University - ENG - sem314
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A.T. Still University - ENG - sem314
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A.T. Still University - ENG - sem314
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A.T. Still University - ENG - sem314
STUDY TOPIC: STEAM PLANTReference: Chapter 8 in the unit Text Book. Previously, you learned the basics of thermodynamics including basic definition, first and second laws of thermodynamics heat engine cycles. From these study, we know that the most
A.T. Still University - ENG - sem314
A.T. Still University - ENG - sem314
A.T. Still University - ENG - sem314
A.T. Still University - ENG - sem314
A.T. Still University - ENG - sem314
A.T. Still University - ENG - sem314
A.T. Still University - ENG - sem314
A.T. Still University - ENG - sem314
A.T. Still University - ENG - sem314
A.T. Still University - ENG - sem212
Gaussian Error Function z 0.00 0.03 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 0.75 0.80 0.85 0.90 0.95 1.00 1.10 1.20 1.30 1.40 1.50 1.60 1.70 1.80 1.90 2.00 2.20 2.40 2.60 2.80 erf(z) 0 0.03 0.06 0.11 0.17 0.22 0.28 0.33
A.T. Still University - ENG - sem212
6.35 This problem asks us to demonstrate that true strain may also be represented byA T = ln 0 A iRearrangement of Equation 6.17 leads toli l0 A0 Ai=Thus, Equation 6.16 takes the forml A T = ln i = ln 0 l A 0 i A The express
A.T. Still University - ENG - sem212
6.38 We are asked to compute how much elongation a metal specimen will experience when a true stress of 415 MPa is applied, given the value of n and that a given true stress produces a specific true strain. Solution of this problem requires that we u
A.T. Still University - ENG - sem212
6.40 For this problem we first need to convert engineering stresses and strains to true stresses and strains so that the constants K and n in Equation 6.19 may be determined. Since T = (1 + ) then,T = (315 MPa)(1 + 0.105) = 348 MPa1T2= (340
A.T. Still University - ENG - sem212
7.7 Below is shown the atomic packing for a BCC {110}-type plane. The arrows indicate two different &lt;111&gt; type directions.7.21 Hexagonal close packed metals are typically more brittle than FCC and BCC metals because there are fewer slip systems in
A.T. Still University - ENG - sem212
7-67.6 (a) For the FCC crystal structure, the planar density for the (110) plane is given in Equation 3.11 asPD110 (FCC) = 1 4 R2 2 = 0.177 R2Furthermore, the planar densities of the (100) and (111) planes are calculated in Homework Problem 3.53
A.T. Still University - ENG - sem212
8-48.4 The maximum allowable surface crack length for MgO may be determined using Equation 8.3; taking 225 GPa as the modulus of elasticity (Table 12.5), and solving for a, leads to2 E s2 ca==(2) (225 x 10 9 N / m2 ) (1.0 N / m) () (13.5 x
A.T. Still University - ENG - sem212
9.9 It is possible to have a Cu-Ag alloy, which at equilibrium consists of a phase of composition 92 wt% Ag-8 wt% Cu and a liquid phase of composition 77 wt% Ag-23 wt% Cu. From Figure 9.7 a horizontal tie line can be constructed across the + L phas