Fluid Mechanics
8th Edition
ISBN: 9780073398273
Author: Frank M. White
Publisher: McGraw-Hill Education
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Chapter 6, Problem 6.13FEEP
To determine
Hydraulic diameter, Dh of rectangular air − ventilation duct whose cross − section is 1 m by 25 cm.
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PROBLEM 2.50
1.8 m
The concrete post (E-25 GPa and a
=
9.9 x 10°/°C) is reinforced with six
steel bars, each of 22-mm diameter (E, = 200 GPa and a, = 11.7 x 10°/°C).
Determine the normal stresses induced in the steel and in the concrete by a
temperature rise of 35°C.
6c
"
0.391 MPa
240 mm
240 mm
6₁ =
-9.47 MPa
For some viscoelastic polymers that are subjected to stress relaxation tests, the stress decays with
time according to
a(t) = a(0) exp(-4)
(15.10)
where σ(t) and o(0) represent the time-dependent and initial (i.e., time = 0) stresses, respectively, and t and T denote
elapsed time and the relaxation time, respectively; T is a time-independent constant characteristic of the material. A
specimen of a viscoelastic polymer whose stress relaxation obeys Equation 15.10 was suddenly pulled in tension to
a measured strain of 0.5; the stress necessary to maintain this constant strain was measured as a function of time.
Determine E (10) for this material if the initial stress level was 3.5 MPa (500 psi), which dropped to 0.5 MPa (70
psi) after 30 s.
For the flows in Examples 11.1 and 11.2, calculate the magnitudes of the Δ V2 / 2 terms omitted in B.E., and compare these with the magnitude of the ℱ terms.
Chapter 6 Solutions
Fluid Mechanics
Ch. 6 - Prob. 6.1PCh. 6 - The present pumping rate of crude oil through the...Ch. 6 - The Keystone Pipeline in the chapter opener photo...Ch. 6 - For flow of SAE 30 oil through a 5-cm-diameter...Ch. 6 - In flow past a body or wall, early transition to...Ch. 6 - P6.6 For flow of a uniform stream parallel to a...Ch. 6 - SAE 10W30 oil at 20°C flows from a tank into a...Ch. 6 - P6.8 When water at 20°C is in steady turbulent...Ch. 6 - A light liquid 950kg/m3 flows at an average...Ch. 6 - Water at 20°C flows through an inclined...
Ch. 6 - Water at 20°C flows upward at 4 m/s in a...Ch. 6 - Prob. 6.12PCh. 6 - Prob. 6.13PCh. 6 - Prob. 6.14PCh. 6 - Prob. 6.15PCh. 6 - Prob. 6.16PCh. 6 - P6.17 A capillary viscometer measures the time...Ch. 6 - P6.18 SAE 50W oil at 20°C flows from one tank to...Ch. 6 - Prob. 6.19PCh. 6 - The oil tanks in Tinyland are only 160 cm high,...Ch. 6 - Prob. 6.21PCh. 6 - Prob. 6.22PCh. 6 - Prob. 6.23PCh. 6 - Prob. 6.24PCh. 6 - Prob. 6.25PCh. 6 - Prob. 6.26PCh. 6 - Let us attack Prob. P6.25 in symbolic fashion,...Ch. 6 - Prob. 6.28PCh. 6 - Prob. 6.29PCh. 6 - Prob. 6.30PCh. 6 - A laminar flow element (LFE) (Meriam Instrument...Ch. 6 - SAE 30 oil at 20°C flows in the 3-cm.diametcr pipe...Ch. 6 - Prob. 6.33PCh. 6 - Prob. 6.34PCh. 6 - In the overlap layer of Fig. 6.9a, turbulent shear...Ch. 6 - Prob. 6.36PCh. 6 - Prob. 6.37PCh. 6 - Prob. 6.38PCh. 6 - Prob. 6.39PCh. 6 - Prob. 6.40PCh. 6 - P6.41 Two reservoirs, which differ in surface...Ch. 6 - Prob. 6.42PCh. 6 - Prob. 6.43PCh. 6 - P6.44 Mercury at 20°C flows through 4 m of...Ch. 6 - P6.45 Oil, SG = 0.88 and v = 4 E-5 m2/s, flows at...Ch. 6 - Prob. 6.46PCh. 6 - Prob. 6.47PCh. 6 - Prob. 6.48PCh. 6 - Prob. 6.49PCh. 6 - Prob. 6.50PCh. 6 - Prob. 6.51PCh. 6 - Prob. 6.52PCh. 6 - Water at 2OC flows by gravity through a smooth...Ch. 6 - A swimming pool W by Y by h deep is to be emptied...Ch. 6 - Prob. 6.55PCh. 6 - Prob. 6.56PCh. 6 - Prob. 6.57PCh. 6 - Prob. 6.58PCh. 6 - P6.59 The following data were obtained for flow of...Ch. 6 - Prob. 6.60PCh. 6 - Prob. 6.61PCh. 6 - Water at 20°C is to be pumped through 2000 ft of...Ch. 6 - Prob. 6.63PCh. 6 - Prob. 6.64PCh. 6 - Prob. 6.65PCh. 6 - Prob. 6.66PCh. 6 - Prob. 6.67PCh. 6 - Prob. 6.68PCh. 6 - P6.69 For Prob. P6.62 suppose the only pump...Ch. 6 - Prob. 6.70PCh. 6 - Prob. 6.71PCh. 6 - Prob. 6.72PCh. 6 - Prob. 6.73PCh. 6 - Prob. 6.74PCh. 6 - Prob. 6.75PCh. 6 - P6.76 The small turbine in Fig. P6.76 extracts 400...Ch. 6 - Prob. 6.77PCh. 6 - Prob. 6.78PCh. 6 - Prob. 6.79PCh. 6 - The head-versus-flow-rate characteristics of a...Ch. 6 - Prob. 6.81PCh. 6 - Prob. 6.82PCh. 6 - Prob. 6.83PCh. 6 - Prob. 6.84PCh. 6 - Prob. 6.85PCh. 6 - SAE 10 oil at 20°C flows at an average velocity of...Ch. 6 - A commercial steel annulus 40 ft long, with a = 1...Ch. 6 - Prob. 6.88PCh. 6 - Prob. 6.89PCh. 6 - Prob. 6.90PCh. 6 - Prob. 6.91PCh. 6 - Prob. 6.92PCh. 6 - Prob. 6.93PCh. 6 - Prob. 6.94PCh. 6 - Prob. 6.95PCh. 6 - Prob. 6.96PCh. 6 - Prob. 6.97PCh. 6 - Prob. 6.98PCh. 6 - Prob. 6.99PCh. 6 - Prob. 6.100PCh. 6 - Prob. 6.101PCh. 6 - *P6.102 A 70 percent efficient pump delivers water...Ch. 6 - Prob. 6.103PCh. 6 - Prob. 6.104PCh. 6 - Prob. 6.105PCh. 6 - Prob. 6.106PCh. 6 - Prob. 6.107PCh. 6 - P6.108 The water pump in Fig. P6.108 maintains a...Ch. 6 - In Fig. P6.109 there are 125 ft of 2-in pipe, 75...Ch. 6 - In Fig. P6.110 the pipe entrance is sharp-edged....Ch. 6 - For the parallel-pipe system of Fig. P6.111, each...Ch. 6 - Prob. 6.112PCh. 6 - Prob. 6.113PCh. 6 - Prob. 6.114PCh. 6 - Prob. 6.115PCh. 6 - Prob. 6.116PCh. 6 - Prob. 6.117PCh. 6 - Prob. 6.118PCh. 6 - Prob. 6.119PCh. 6 - Prob. 6.120PCh. 6 - Prob. 6.121PCh. 6 - Prob. 6.122PCh. 6 - Prob. 6.123PCh. 6 - Prob. 6.124PCh. 6 - Prob. 6.125PCh. 6 - Prob. 6.126PCh. 6 - Prob. 6.127PCh. 6 - In the five-pipe horizontal network of Fig....Ch. 6 - Prob. 6.129PCh. 6 - Prob. 6.130PCh. 6 - Prob. 6.131PCh. 6 - Prob. 6.132PCh. 6 - Prob. 6.133PCh. 6 - Prob. 6.134PCh. 6 - An airplane uses a pitot-static tube as a...Ch. 6 - Prob. 6.136PCh. 6 - Prob. 6.137PCh. 6 - Prob. 6.138PCh. 6 - P6.139 Professor Walter Tunnel needs to measure...Ch. 6 - Prob. 6.140PCh. 6 - Prob. 6.141PCh. 6 - Prob. 6.142PCh. 6 - Prob. 6.143PCh. 6 - Prob. 6.144PCh. 6 - Prob. 6.145PCh. 6 - Prob. 6.146PCh. 6 - Prob. 6.147PCh. 6 - Prob. 6.148PCh. 6 - Prob. 6.149PCh. 6 - Prob. 6.150PCh. 6 - Prob. 6.151PCh. 6 - Prob. 6.152PCh. 6 - Prob. 6.153PCh. 6 - Prob. 6.154PCh. 6 - Prob. 6.155PCh. 6 - Prob. 6.156PCh. 6 - Prob. 6.157PCh. 6 - Prob. 6.158PCh. 6 - Prob. 6.159PCh. 6 - Prob. 6.160PCh. 6 - Prob. 6.161PCh. 6 - Prob. 6.162PCh. 6 - Prob. 6.163PCh. 6 - Prob. 6.1WPCh. 6 - Prob. 6.2WPCh. 6 - Prob. 6.3WPCh. 6 - Prob. 6.4WPCh. 6 - Prob. 6.1FEEPCh. 6 - Prob. 6.2FEEPCh. 6 - Prob. 6.3FEEPCh. 6 - Prob. 6.4FEEPCh. 6 - Prob. 6.5FEEPCh. 6 - Prob. 6.6FEEPCh. 6 - Prob. 6.7FEEPCh. 6 - Prob. 6.8FEEPCh. 6 - Prob. 6.9FEEPCh. 6 - Prob. 6.10FEEPCh. 6 - Prob. 6.11FEEPCh. 6 - Prob. 6.12FEEPCh. 6 - Prob. 6.13FEEPCh. 6 - Prob. 6.14FEEPCh. 6 - Prob. 6.15FEEPCh. 6 - Prob. 6.1CPCh. 6 - Prob. 6.2CPCh. 6 - Prob. 6.3CPCh. 6 - Prob. 6.4CPCh. 6 - Prob. 6.5CPCh. 6 - Prob. 6.6CPCh. 6 - Prob. 6.7CPCh. 6 - Prob. 6.8CPCh. 6 - Prob. 6.9CPCh. 6 - A hydroponic garden uses the 10-m-long...Ch. 6 - It is desired to design a pump-piping system to...
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