FUNDAMENTALS OF ENGINEERING THERMODYNAM
8th Edition
ISBN: 2818440116926
Author: MORAN
Publisher: WILEY CONS
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Chapter 4.12, Problem 87P
(a)
To determine
The mass flow rate for the water.
(b)
To determine
The specific enthalpy for the water.
(c)
To determine
The temperature of water at outlet.
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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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