CONCEPTUAL PHYSICS LL FD
CONCEPTUAL PHYSICS LL FD
12th Edition
ISBN: 9780135745816
Author: Hewitt
Publisher: PEARSON
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Chapter 3, Problem 71RCQ
To determine

If there were no air resistance, why would it be dangerous to go outdoors on rainy days?

Solution:

If there were no air resistance, the speed of the rain drops falling from the clouds will be so high that it can cause injury to our heads.

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2. In class, we discussed several different flow scenarios for which we can make enough assumptions to simplify the Navier-Stokes equations enough to solve them and obtain an exact solution. Consulting the cylindrical form of the Navier-Stokes equations copied below, please answer the following questions. др a 1 a + +0x- + +O₂ = Pgr + μl 18²v, 2 ave ²v₁] az2 + at or r de r Əz dr ar Vodvz др [18 + + +Or + +Vz = Pgz +fl at ar r 20 ôz ôz dr ave дов V,Ve ave +Or + + = pge at dr r 80 Əz + az2 a.) In class, we discussed how the Navier-Stokes equations are an embodiment of Newton's 2nd law, F = ma (where bolded terms are vectors). Name the 3 forces that we are considering in our analysis of fluid flow for this class. др a 10 1 ve 2 av 2200] + +μ or 42 30 b.) If we make the assumption that flow is "fully developed" in the z direction, which term(s) would go to zero? Write the term below, describe what the term means in simple language (i.e. do not simply state "it is the derivative of a with…
1. Consult the form of the x-direction Navier-Stokes equation below that we discussed in class. (For this problem, only the x direction equation is shown for simplicity). Note that the equation provided is for a Cartesian coordinate system. In the spaces below, indicate which of the following assumptions would allow you to eliminate a term from the equation. If one of the assumptions provided would not allow you to eliminate a particular term, write "none" in the space provided. du ди at ( + + + 매일) du ди = - Pgx dy др dx ²u Fu u + fl + ax2 ay² az2 - дх - Əz 1 2 3 4 5 6 7 8 9 Assumption Flow is in the horizontal direction (e.g. patient lying on hospital bed) Flow is unidirectional in the x-direction Steady flow We consider the flow to be between two flat, infinitely wide plates There is no pressure gradient Flow is axisymmetric Term(s) in equation
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Chapter 3 Solutions

CONCEPTUAL PHYSICS LL FD

Ch. 3 - Prob. 11RCQCh. 3 - Prob. 12RCQCh. 3 - Prob. 13RCQCh. 3 - Prob. 14RCQCh. 3 - Prob. 15RCQCh. 3 - Prob. 16RCQCh. 3 - Prob. 17RCQCh. 3 - Prob. 18RCQCh. 3 - Prob. 19RCQCh. 3 - Prob. 20RCQCh. 3 - Prob. 21RCQCh. 3 - Prob. 22RCQCh. 3 - Prob. 23RCQCh. 3 - Prob. 24RCQCh. 3 - Prob. 25RCQCh. 3 - Try this with your friends. Hold a dollar bill so...Ch. 3 - Prob. 27RCQCh. 3 - Prob. 28RCQCh. 3 - Prob. 29RCQCh. 3 - Prob. 30RCQCh. 3 - Prob. 31RCQCh. 3 - Prob. 32RCQCh. 3 - Prob. 33RCQCh. 3 - Prob. 34RCQCh. 3 - Prob. 35RCQCh. 3 - Prob. 36RCQCh. 3 - Prob. 37RCQCh. 3 - Prob. 38RCQCh. 3 - Prob. 39RCQCh. 3 - Prob. 40RCQCh. 3 - Jogging Jake runs along a train flatcar that moves...Ch. 3 - A track is made from a piece of channel iron as...Ch. 3 - A ball is released at the left end of three...Ch. 3 - Three balls of different masses are thrown...Ch. 3 - Here we see a top view of an airplane being blown...Ch. 3 - Here we see top views of three motorboats crossing...Ch. 3 - Prob. 47RCQCh. 3 - Prob. 48RCQCh. 3 - Prob. 49RCQCh. 3 - Prob. 50RCQCh. 3 - Prob. 51RCQCh. 3 - Prob. 52RCQCh. 3 - Prob. 53RCQCh. 3 - Prob. 54RCQCh. 3 - Prob. 55RCQCh. 3 - Prob. 56RCQCh. 3 - Prob. 57RCQCh. 3 - Prob. 58RCQCh. 3 - Prob. 59RCQCh. 3 - Prob. 60RCQCh. 3 - Prob. 61RCQCh. 3 - Prob. 62RCQCh. 3 - Prob. 63RCQCh. 3 - Prob. 64RCQCh. 3 - Prob. 65RCQCh. 3 - Prob. 66RCQCh. 3 - Prob. 67RCQCh. 3 - Prob. 68RCQCh. 3 - Prob. 69RCQCh. 3 - Prob. 70RCQCh. 3 - Prob. 71RCQCh. 3 - Prob. 72RCQCh. 3 - Prob. 73RCQCh. 3 - Prob. 74RCQCh. 3 - Prob. 75RCQCh. 3 - Prob. 76RCQCh. 3 - Prob. 77RCQCh. 3 - Prob. 78RCQCh. 3 - Prob. 79RCQCh. 3 - Prob. 80RCQCh. 3 - Prob. 81RCQCh. 3 - Prob. 82RCQCh. 3 - Prob. 83RCQCh. 3 - Prob. 84RCQCh. 3 - Prob. 85RCQCh. 3 - Prob. 86RCQCh. 3 - Prob. 87RCQCh. 3 - 88. On which of these hills does the ball roll...Ch. 3 - Prob. 89RCQCh. 3 - Prob. 90RCQCh. 3 - Prob. 91RCQCh. 3 - Prob. 92RCQCh. 3 - Prob. 93RCQCh. 3 - Prob. 94RCQCh. 3 - 95. Two balls are released simultaneously from...Ch. 3 - Prob. 96RCQCh. 3 - Prob. 97RCQCh. 3 - Prob. 98RCQCh. 3 - Prob. 99RCQCh. 3 - Prob. 100RCQ
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