THERMODYNAMICS (LL)-W/ACCESS >CUSTOM<
9th Edition
ISBN: 9781266657610
Author: CENGEL
Publisher: MCG CUSTOM
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Textbook Question
Chapter 2.8, Problem 104P
Reconsider Prob. 2–103. Using appropriate software, investigate the effect of the convection heat transfer coefficient on the surface temperature of the plate. Let the heat transfer coefficient vary from 10 to 90 W/m2·°C. Plot the surface temperature against the convection heat transfer coefficient, and discuss the results.
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(15) A block of metal with a Young's Modulus of E=200 GPa and Poisson's ratio of 0.3, has dimensions of 38 mm × 20 mm x 80 mm for the
lengths X, Y and Z respectively as illustrated in Figure Q15. The block experiences a tensile force in the x-direction of 100 kN and also an
applied tensile force in the z-direction of 200 kN as illustrated in Figure Q15.
Calculate the strain experienced in the x-direction in terms of micro-strain.
Stating your answer to the nearest whole number.
100 kN
200 kN
X=38 mm
Y = 20 mm
○ A.-188 microstrain
OB. -82 microstrain
○ c. no valid answer
OD. +83 microstrain
○ E. -187 microstrain
Z
Figure Q15
200 kN
Z = 80 mm
100 kN
y
X
Figure Q3 shows a symmetrically loaded beam, loaded with a single Uniform Distributed Load (UDL) starting from the leftmost position A (x = 0 m) ending at the end of the beam at the rightmost position D. The UDL has loading case of 10 kN/m, see Figure Q3 for the start and end positions. There are two symmetrically located pivots causing reaction forces of RB at position B (Y = 1.3 m) and RC at position C. The central section of the beam spans for 2.4 m.
Calculate the Shear Force value at a position of X=1.9 m.
State your answer in kilo-Newtons to one decimal place.
(6) An I beam that is Z=685 mm long has a symmetric cross-section shown in Figure Q6. The lower and upper sections are 2Y wide and the middle section of the I beam is Y wide, where Y=44 mm wide. All three sections have a depth of
44mm, as illustrated in Figure Q6. The I beam is pulled apart by a force of X=32 kN.
What is the maximum stress experienced in the shaft in terms of mega-Pascals.
State your answer to 1 decimal place.
Y mm
F = X KN
Y mm
Y mm
Y mm
2Y mm
Z mm
Figure Q6
F= X KN
Chapter 2 Solutions
THERMODYNAMICS (LL)-W/ACCESS >CUSTOM<
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- (7) A solid shaft of diameter X=18 mm and length of Y=1.4 m experiences torque using a short rod that is Z=520 mm long and is fixed at the open end of shaft experiencing the torque. The torque is created with the application of a 760 N perpendicular force. The set-up is illustrated below in Figure Q7. Given the shaft has a shear modulus of 70 GPa, calculate the angle of twist in terms of degrees? State your answer to the nearest whole number. Ym Figure Q7 X mm 750 NA Z mmarrow_forwardCalculate the strain experienced in the x-direction in terms of micro-strain. Stating your answer to the nearest whole number. 100 kN 200 kN X=38 mm A. +83 microstrain B. no valid answer ○ C.-187 microstrain ○ D.-82 microstrain OE. -188 microstrain Y = 20 mm Z Figure Q15 200 kN Z = 80 mm 100 kN y Xarrow_forward(7) A solid shaft of diameter X=18 mm and length of Y=0.8 m experiences torque using a short rod that is Z=569 mm long and is fixed at the open end of shaft experiencing the torque. The torque is created with the application of a 750 N perpendicular force. The set-up is illustrated below in Figure Q7. Given the shaft has a shear modulus of 80 GPa, calculate the angle of twist in terms of degrees? State your answer to the nearest whole number. Ym Figure Q7 X mm 750 NA Z mmarrow_forward
- Please do not rely too much on chatgpt, because its answer may be wrong. Please consider it carefully and give your own answer. You can borrow ideas from gpt, but please do not believe its answer.Very very grateful! Please do not copy other's work,i will be very very grateful!!arrow_forward(3) Figure Q3 shows a symmetrically loaded beam, loaded with a single Uniform Distributed Load (UDL) starting from the leftmost position A (x = 0 m) ending at the end of the beam at the rightmost position D. The UDL has loading case of 10 kN/m, see Figure Q3 for the start and end positions. There are two symmetrically located pivots causing reaction forces of RB at position B (Y 1.4 m) and Rc at position C. The central section of the beam spans for 2.8 m. Calculate the Shear Force value (using the sign convention given to you in the module's formula book) at a position of X=1.7 m. State your answer in kilo-Newtons to one decimal place. UDL = 10 kN/m A Ym B X = ? Zm + ⭑C Ym Darrow_forward(6) An I beam that is Z=691 mm long has a symmetric cross-section shown in Figure Q6. The lower and upper sections are 2Y wide and the middle section of the I beam is Y wide, where Y=26 mm wide. All three sections have a depth of 26mm, as illustrated in Figure Q6. The I beam is pulled apart by a force of X=77 kN. What is the maximum stress experienced in the shaft in terms of mega-Pascals. State your answer to 1 decimal place. Y mm F = X KN Y mm Y mm Y mm 2Y mm Figure Q6 Z mm F = X KNarrow_forward
- Select the safest Factor of Safety (FOS) to 1 decimal place that the design engineer should work to. ○ A No Valid Answer B. 1.2 C.3.7 D.0.8 E. 1.1 100 kN 2 m Figure Q13 120 mmarrow_forward(9) Figure Q9 shows a 2 m long symmetric I beam where the upper and lower sections are 2X wide and the middle section is X wide, where X is 49 mm. The I beam sections are all Y=48 mm in depth. The beam is loaded in the middle with a load of Z=59 kN causing reaction forces at either end of the beam's supports. What is the maximum (positive) bending stress experienced in the beam in terms of mega-Pascals? State your answer to the nearest whole number. Z KN Y mm Y mm Y mm X mm 2X mm Figure Q9 2 marrow_forwardstep by steparrow_forward
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