FUNDAMENTALS OF ENGINEERING THERMODYNAM
8th Edition
ISBN: 2818440116926
Author: MORAN
Publisher: WILEY CONS
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Chapter 4.12, Problem 41CU
To determine
Whether the following statement is true or false:
- In this book the flow at control volume inlets and exits is normally taken as one-dimensional.
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Problem 6 (Optional, extra 6 points)
150 mm
150 mm
120 mm
80 mm
60 mm
PROBLEM 18.103
A 2.5 kg homogeneous disk of radius 80 mm rotates with an
angular velocity ₁ with respect to arm ABC, which is welded
to a shaft DCE rotating as shown at the constant rate
w212 rad/s. Friction in the bearing at A causes ₁ to
decrease at the rate of 15 rad/s². Determine the dynamic
reactions at D and E at a time when ₁ has decreased to
50 rad/s.
Answer:
5=-22.01 +26.8} N
E=-21.2-5.20Ĵ N
Problem 1.
Two uniform rods AB and CE, each of weight 3 lb and length 2 ft, are welded to each other at their
midpoints. Knowing that this assembly has an angular velocity of constant magnitude c = 12 rad/s,
determine:
(1). the magnitude and direction of the angular momentum HD of the assembly about D.
(2). the dynamic reactions (ignore mg) at the bearings at A and B.
9 in.
3 in.
03
9 in.
3 in.
Answers: HD = 0.162 i +0.184 j slug-ft²/s
HG = 2.21 k
Ay =-1.1 lb; Az = 0; By = 1.1 lb; B₂ = 0.
Problem 5 (Optional, extra 6 points)
A 6-lb homogeneous disk of radius 3 in. spins as shown at the constant rate w₁ = 60 rad/s. The disk
is supported by the fork-ended rod AB, which is welded to the vertical shaft CBD. The system is
at rest when a couple Mo= (0.25ft-lb)j is applied to the shaft for 2 s and then removed. Determine
the dynamic reactions at C and D before and after the couple has been removed at 2 s.
4 in.
C
B
Mo
5 in
4 in.
Note: 2 rotating around CD induced by Mo is NOT
constant before Mo is removed.
and ₂ (two
unknowns) are related by the equation: ₂ =0+ w₂t
3 in.
Partial Answer (after Mo has been removed):
C-7.81+7.43k lb
D -7.81 7.43 lb
Chapter 4 Solutions
FUNDAMENTALS OF ENGINEERING THERMODYNAM
Ch. 4.12 - Prob. 1ECh. 4.12 - 2. When a drip coffeemaker on-off switch is turned...Ch. 4.12 - Prob. 3ECh. 4.12 - Prob. 4ECh. 4.12 - Prob. 5ECh. 4.12 - Prob. 6ECh. 4.12 - Prob. 7ECh. 4.12 - Prob. 8ECh. 4.12 - Prob. 9ECh. 4.12 - 10. How does the operator of a pumper-tanker fire...
Ch. 4.12 - Prob. 11ECh. 4.12 - Prob. 12ECh. 4.12 - 13. If the expansion valve of a refrigerator...Ch. 4.12 - Prob. 14ECh. 4.12 - Prob. 15ECh. 4.12 - Prob. 1CUCh. 4.12 - 6. Liquid flows at steady state at a rate of 2...Ch. 4.12 - 7. A flow idealized as a throttling process...Ch. 4.12 - 8. __________ is the work associated with the...Ch. 4.12 - 9. Steady flow devices that result in a drop in...Ch. 4.12 - 10. Steam enters a horizontal pipe operating at...Ch. 4.12 - Prob. 11CUCh. 4.12 - Prob. 12CUCh. 4.12 - Prob. 13CUCh. 4.12 - 14. _______ means all properties are unchanging in...Ch. 4.12 - Prob. 15CUCh. 4.12 - Prob. 16CUCh. 4.12 - 17. ________ operation involves state changes with...Ch. 4.12 - Prob. 18CUCh. 4.12 - 19. A horizontal air diffuser operates with inlet...Ch. 4.12 - 20. Mass flow rate for a flow modeled as...Ch. 4.12 - Prob. 21CUCh. 4.12 - Prob. 22CUCh. 4.12 - Prob. 23CUCh. 4.12 - 24. The mechanisms of energy transfer for a...Ch. 4.12 - 25. For one-dimensional flow, mass flow rate is...Ch. 4.12 - 26. At steady state, conservation of mass asserts...Ch. 4.12 - Prob. 27CUCh. 4.12 - Prob. 28CUCh. 4.12 - Prob. 29CUCh. 4.12 - Prob. 30CUCh. 4.12 - Prob. 31CUCh. 4.12 - Prob. 32CUCh. 4.12 - 33. A significant increase in pressure can be...Ch. 4.12 - Prob. 34CUCh. 4.12 - Prob. 35CUCh. 4.12 - Prob. 36CUCh. 4.12 - 37. Factors that may allow one to model a control...Ch. 4.12 - Prob. 38CUCh. 4.12 - Prob. 39CUCh. 4.12 - Prob. 40CUCh. 4.12 - Prob. 41CUCh. 4.12 - Prob. 42CUCh. 4.12 - Prob. 43CUCh. 4.12 - 44. The human body is an example of an integrated...Ch. 4.12 - Prob. 45CUCh. 4.12 - Prob. 46CUCh. 4.12 - 47. The thermodynamic performance of a device such...Ch. 4.12 - 48. For every control volume at steady state, the...Ch. 4.12 - Prob. 49CUCh. 4.12 - Prob. 50CUCh. 4.12 - Prob. 51CUCh. 4.12 - 52. At steady state, identical electric fans...Ch. 4.12 - Prob. 1PCh. 4.12 - Prob. 2PCh. 4.12 - 4.3 Steam enters a 1.6-cm-diameter pipe at 80 bar...Ch. 4.12 - Prob. 4PCh. 4.12 - Prob. 5PCh. 4.12 - Prob. 6PCh. 4.12 - 4.7 Figure P4.7 provides data for water entering...Ch. 4.12 - Prob. 8PCh. 4.12 - Prob. 9PCh. 4.12 - 4.10 Data are provided for the crude oil storage...Ch. 4.12 - 4.11 An 8-ft3 tank contains air at an initial...Ch. 4.12 - Prob. 12PCh. 4.12 - Prob. 13PCh. 4.12 - Prob. 14PCh. 4.12 - 4.15 Liquid water flows isothermally at 20°C...Ch. 4.12 - Prob. 16PCh. 4.12 - Prob. 17PCh. 4.12 - Prob. 18PCh. 4.12 - 4.19 As shown in Fig. P4.19, steam at 80 bar,...Ch. 4.12 - Prob. 20PCh. 4.12 - Prob. 21PCh. 4.12 - Prob. 22PCh. 4.12 - Prob. 23PCh. 4.12 - 4.24 Refrigerant 134a enters a horizontal pipe...Ch. 4.12 - 4.25 As shown in Fig. P4.25, air enters a pipe at...Ch. 4.12 - 4.26 Air enters a horizontal, constant-diameter...Ch. 4.12 - 4.27 Air at 600 kPa, 330 K enters a...Ch. 4.12 - 4.28 At steady state, air at 200 kPa, 325 K, and...Ch. 4.12 - 4.29 Refrigerant 134a flows at steady state...Ch. 4.12 - 4.30 As shown in Fig. P4.30, electronic components...Ch. 4.12 - 4.31 Steam enters a nozzle operating at steady...Ch. 4.12 - 4.32 Refrigerant 134a enters a well-insulated...Ch. 4.12 - 4.33 Air enters a nozzle operating at steady state...Ch. 4.12 - Prob. 34PCh. 4.12 - Prob. 35PCh. 4.12 - 4.36 Nitrogen, modeled as an ideal gas, flows at a...Ch. 4.12 - Prob. 37PCh. 4.12 - Prob. 38PCh. 4.12 - Prob. 39PCh. 4.12 - 4.40 Oxygen gas enters a well-insulated diffuser...Ch. 4.12 - Prob. 41PCh. 4.12 - 4.42 Steam enters a well-insulated turbine...Ch. 4.12 - Prob. 43PCh. 4.12 - 4.44 Air expands through a turbine operating at...Ch. 4.12 - Prob. 45PCh. 4.12 - 4.46 A well-insulated turbine operating at steady...Ch. 4.12 - Prob. 47PCh. 4.12 - Prob. 48PCh. 4.12 - Prob. 49PCh. 4.12 - Prob. 50PCh. 4.12 - Prob. 51PCh. 4.12 - Prob. 52PCh. 4.12 - Prob. 53PCh. 4.12 - 4.54 Nitrogen is compressed in an axial-flow...Ch. 4.12 - Prob. 55PCh. 4.12 - Prob. 56PCh. 4.12 - Prob. 57PCh. 4.12 - Prob. 58PCh. 4.12 - Prob. 59PCh. 4.12 - 4.60 Refrigerant 134a enters an insulated...Ch. 4.12 - Prob. 61PCh. 4.12 - Prob. 62PCh. 4.12 - 4.63 Air enters a compressor operating at steady...Ch. 4.12 - 4.64 Air enters a compressor operating at steady...Ch. 4.12 - Prob. 65PCh. 4.12 - Prob. 66PCh. 4.12 - Prob. 67PCh. 4.12 - 4.68 As shown in Fig. P4.68, a power washer used...Ch. 4.12 - Prob. 69PCh. 4.12 - Prob. 70PCh. 4.12 - Prob. 71PCh. 4.12 - 4.72 Oil enters a counterflow heat exchanger at...Ch. 4.12 - Prob. 73PCh. 4.12 - Prob. 74PCh. 4.12 - Prob. 75PCh. 4.12 - Prob. 76PCh. 4.12 - Prob. 77PCh. 4.12 - Prob. 78PCh. 4.12 - Prob. 79PCh. 4.12 - Prob. 80PCh. 4.12 - Prob. 83PCh. 4.12 - Prob. 84PCh. 4.12 - Prob. 85PCh. 4.12 - Prob. 86PCh. 4.12 - Prob. 87PCh. 4.12 - Prob. 88PCh. 4.12 - Prob. 89PCh. 4.12 - Prob. 90PCh. 4.12 - Prob. 91PCh. 4.12 - Prob. 92PCh. 4.12 - Prob. 93PCh. 4.12 - Prob. 94PCh. 4.12 - Prob. 95PCh. 4.12 - Prob. 96PCh. 4.12 - 4.97 As shown in Fig. P4.97, Refrigerant 22 enters...Ch. 4.12 - Prob. 98PCh. 4.12 - Prob. 99PCh. 4.12 - Prob. 100PCh. 4.12 - Prob. 101PCh. 4.12 - 4.102 Steady-state operating data for a simple...Ch. 4.12 - Prob. 103PCh. 4.12 - Prob. 104PCh. 4.12 - Prob. 105PCh. 4.12 - Prob. 106PCh. 4.12 - Prob. 107PCh. 4.12 - Prob. 108PCh. 4.12 - Prob. 109PCh. 4.12 - Prob. 110PCh. 4.12 - Prob. 111PCh. 4.12 - Prob. 112PCh. 4.12 - 4.113 An insulated, rigid tank whose volume is 10...Ch. 4.12 - Prob. 114PCh. 4.12 - Prob. 115PCh. 4.12 - Prob. 116PCh. 4.12 - Prob. 117PCh. 4.12 - Prob. 119PCh. 4.12 - Prob. 122PCh. 4.12 - Prob. 127PCh. 4.12 - Prob. 128PCh. 4.12 - 4.130 The procedure to inflate a hot-air balloon...
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