Fundamentals of Thermal-Fluid Sciences
5th Edition
ISBN: 9780078027680
Author: Yunus A. Cengel Dr., Robert H. Turner, John M. Cimbala
Publisher: McGraw-Hill Education
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Chapter 1, Problem 6P
To determine
Why is heat transfer a non-equilibrium phenomenon?
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3. A steel bar is pinned to a vertical support column by a 10 mm diameter hardened dowel pin,
Figure 1. For P = 7500 N, find:
a. the shear stress in the pin,
b. the direct bearing stress on the hole in the bar,
c. the minimum value of d to prevent tearout failure if the steel bar has a shear strength of
175 MPa.
support column
pin
bar
thickness of bar = 8 mm
h
d
150 mm
A press that delivers 115 strokes per minute, each stroke providing a force of 7826 N throughout a distance of 18 mm. The press efficiency is 90% and is driven by a 1749-rpm motor.
Determine average torque that must be provided by the motor in the units of N-m.
·3) find the force (P) for the figures (1) and (2)
15cm
10cm
15
h=10mm
h2=6mm
// Call = 90 N/2
P
Agate Fig (i)
Ans:
1)P=112614N
2) P=1956.5 N
25cm
25 cm
الفترة أو الحجم تمر بالتي عثر
اكو
تورشن (ک
Fig (2)
h₁ = 10mm
42=6mm
Cm
Chapter 1 Solutions
Fundamentals of Thermal-Fluid Sciences
Ch. 1 - Prob. 1PCh. 1 - An office worker claims that a cup of cold coffee...Ch. 1 - One of the most amusing things a person can...Ch. 1 - How does the science of heat transfer differ from...Ch. 1 - What is the driving force for (a) heat transfer,...Ch. 1 - Why is heat transfer a nonequilibrium...Ch. 1 - Can there be any heat transfer between two bodies...Ch. 1 - Define stress, normal stress, shear stress, and...Ch. 1 - What is the difference between kg-mass and...Ch. 1 - Explain why the light-year has the dimension of...
Ch. 1 - What is the net force acting on a car cruising at...Ch. 1 - At 45° latitude, the gravitational acceleration as...Ch. 1 - What is the weight, in N, of an object with a mass...Ch. 1 - A 3-kg plastic tank that has a volume of 0.2 m3 is...Ch. 1 - Prob. 15PCh. 1 - A 3-kg rock is thrown upward with a force of 200 N...Ch. 1 - Solve Prob. 1–16 using an appropriate software....Ch. 1 - A 4-kW resistance heater in a water heater runs...Ch. 1 - A 150-lbm astronaut took his bathroom scale (a...Ch. 1 - The gas tank of a car is filled with a nozzle that...Ch. 1 - A pool of volume (in m3) is to be filled with...Ch. 1 - The weight of bodies may change somewhat from one...Ch. 1 - A man goes to a traditional market to buy a steak...Ch. 1 - Prob. 24RQCh. 1 - Consider the flow of air through a wind turbine...Ch. 1 - The drag force exerted on a car by air depends on...Ch. 1 - What is the value of the engineering software...
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- 3. A steam power plant has an average monthly net power delivery of 740 MW over the course of a year. This power delivery is accomplished by burning coal in the boiler. The coal has a heating value of 9150 Btu/lbm. The cost of the coal is $14.20/ton. The overall thermal efficiency of the plant is, nth = Wnet Qboiler = 0.26 = 26% Determine the annual cost of the coal required to deliver the given average monthly power.arrow_forward47 14 16 12 34 10 12 12 33arrow_forward= The forces F₁ = 590 lb, F₂ = 380 lb, F3 = 240 lb and F 330 lb. Determine the forces in each member of the truss. Use positive values to indicate tension and negative values to indicate compression. a a a D b F₁ A 000 B. 779977 F₂V H G E F4 b BY NC SA 2013 Michael Swanbom Values for dimensions on the figure are given in the following table. Note the figure may not be to scale. Variable Value a 6 ft b 10.1 ft The force in member AB is lb. The force in member AH is lb. The force in member GH is lb. The force in member BH is lb. The force in member BC is lb. The force in member BG is lb. The force in member EG is lb. The force in member CD is lb. The force in member DE is lb. The force in member CE is lb. The force in member CG is lb.arrow_forward
- Multiple Choice Circle the best answer to each statement. 1. Which type of surface deviation is controlled by a cy- lindricity tolerance but not by a circularity tolerance? A. B. C. Ovality Taper Lobing D. None of the above 2. When verifying a cylindricity tolerance, the inspec- tion method must be able to collect a set of points and determine the: A. Distance between two coaxial cylinders that con- tain the set of points B. Cylinder that circumscribes the set of points C. Cylinder that inscribes the set of points D. Distance between two coaxial circles that contain the set of points 3. Where Rule #1 applies to a cylindrical regular feature of size, the tolerance value of a cylindricity tolerance applied to the feature of size must be tolerance. A. Less than B. Equal to C. Greater than D. None of the above the size 4. Which of the following modifiers may be applied with a cylindricity tolerance? A. M B. C. ℗ D. Ø 5. Which geometric tolerance can provide an indirect cylindricity…arrow_forwardThe beam AB is attached to the wall in the xz plane by a fixed support at A. A force of F = (−129î + 69.0ĵ + 3591) N is applied to the end of the beam at B. The weight of the beam can be modeled with a uniform distributed load of intensity w = 85.0 N/m acting in the negative z direction along its entire length. Find the support reactions at A. Z с A b a B F y Cc 10 BY NC SA 2016 Eric Davishahl X Values for dimensions on the figure are given in the following. table. Note the figure may not be to scale. Variable Value a 5.60 m b 5.00 m C 3.70 m A II = MA = ( m 2.> ~.> + + k) N k) N-arrow_forwardneed help?arrow_forward
- A bent pipe is attached to a wall with brackets as shown. A force of F = 180 lb is applied to the end of the tube with direction indicated by the dimensions in the figure. Determine the support reactions at the brackets B, C, and D. Model these brackets as journal bearings (only force reactions perpendicular to the axis of the tube) and neglect couple moment reactions. Assume the distance between the supports at B and C and the tube bends nearby are negligible such that the support at C is directly above the support at D and the dimension g gives the distance between supports B and C. Enter your answers in Cartesian components. 2013 Michael Swanbom cc 10 BY NC SA g h א B 8° У A C x каж Values for dimensions on the figure are given in the table below. Note the figure may not be to scale. Variable Value a 6.72 in b 11.8 in с 14.8 in d 42.0 in h 26.6 in g 28.0 in → The reaction at B is B = lb. The reaction at C is C = lb. The reaction at D is D = lb. + << + + 2. + + 557 〈んarrow_forwardThe force F1 = 10 kN, F2 = 10 kN, F3 = 10 kN, F4 = 5 KN are acting on the sttructure shown. Determine the forces in the members specified below. Use positive values to indicate tension and negative values to indicate compression. F2 D b F1 F3 C E b F4 b B F a G Values for dimensions on the figure are given in the following table. Note the figure may not be to scale. Variable Value a 3 m b 4 m The force in member BC is KN. The force in member BE is KN. The force in member EF is KN.arrow_forwardh = The transmission tower is subjected to the forces F₁ 3.6 KN at 50° and F2 = 3.3 kN at = 35°. Determine the forces in members BC, BP, PQ, PC, CD, DP and NP. Use positive values to indicate tension and negative values to indicate compression. 不 кажаж в *а*аж E N M d d IF, c B CENTER LINE S อ K F₂ Kbb cc 10 BY NC SA 2013 Michael Swanbom Values for dimensions on the figure are given in the following table. Note the figure may not be to scale. Variable Value a 1.7 m b 4.9 m с 3 m d 5.2 m h 8.4 m Values for dimensions on the figure are given in the following table. Note the figure may not be to scale. Variable Value a 1.7 m 4.9 m с 3 m d 5.2 m h 8.4 m The force in member BC is KN. The force in member BP is KN. The force in member PQ is KN. The force in member PC is KN. The force in member CD is KN. The force in member DP is KN. The force in member NP is KN.arrow_forward
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