EBK ENGINEERING MECHANICS
15th Edition
ISBN: 9780137569830
Author: HIBBELER
Publisher: VST
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Chapter 8, Problem 4P
To determine
The force in the cable required to begin the lift.
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1. A simply supported shaft is shown in Figure 1 with wo = 25 N/cm and M = 20 N cm. Use
singularity functions to determine the reactions at the supports. Assume EI = 1000 kN cm².
M
Wo
0 10 20 30 40 50 60 70
80 90
100 110 cm
Figure 1 - Problem 1
2. A support hook was formed from a rectangular bar. Find the stresses at the inner and outer
surfaces at sections just above and just below O-B.
210 mm
A distillation column with a total condenser and a partial reboiler is separating ethanol andwater at 1.0 atm. Feed is 0.32 mol fraction ethanol and it enters as a saturated liquid at 100mol/s on the optimum plate. The distillate product is a saturated liquid with 80 mol% ethanol.The condenser removes 5615 kW. The bottoms product is 0.05 mol fraction ethanol. AssumeCMO is valid.(a) Find the number of equilibrium stages for this separation. [6 + PR](b) Find how much larger the actual reflux ratio, R, used is than Rmin, i.e. R/Rmin. [3]Note: the heats of vaporization of ethanol and water are λe = 38.58 and λw = 40.645
Chapter 8 Solutions
EBK ENGINEERING MECHANICS
Ch. 8 - F81. Determine the friction developed between the...Ch. 8 - F82. Determine the minimum force P to prevent the...Ch. 8 - Prob. 3FPCh. 8 - F84. If the coefficient of static friction at...Ch. 8 - F85. Determine the maximum force P that can be...Ch. 8 - F86. Determine the minimum coefficient of static...Ch. 8 - F87. Blocks A, B, and C have weights of 50 N, 25...Ch. 8 - F88. If the coefficient of static friction at all...Ch. 8 - Prob. 9FPCh. 8 - Determine the maximum force P the connection can...
Ch. 8 - The mine car and its contents have a total mass of...Ch. 8 - Prob. 4PCh. 8 - The automobile has a mass of 2 Mg and center of...Ch. 8 - The automobile has a mass of 2 Mg and canter of...Ch. 8 - Prob. 9PCh. 8 - Determine the angle at which the applied force P...Ch. 8 - Prob. 12PCh. 8 - The car has a mass of 1.6 Mg and center of mass at...Ch. 8 - The log has a coefficient of state friction of, s...Ch. 8 - The spool of wire having a weight of 300 Ib rests...Ch. 8 - The spool of wire having a weight of 300 Ib rests...Ch. 8 - Prob. 20PCh. 8 - The uniform thin pole has a weight of 30 Ib and a...Ch. 8 - The uniform pole has a weight of 30 Ib and a...Ch. 8 - The friction pawl is pinned at A and rests against...Ch. 8 - Two blocks A and B have a weight of 10 Ib and 6...Ch. 8 - Two blocks A and B have a weight of 10 Ib and 6...Ch. 8 - Determine the smallest force P that must be...Ch. 8 - The man having a weight of 200 Ib pushes...Ch. 8 - The uniform hoop of weight W is subjected to the...Ch. 8 - Determine the maximum horizontal force P that can...Ch. 8 - Determine the minimum force P needed to push the...Ch. 8 - Prob. 41PCh. 8 - Prob. 42PCh. 8 - Prob. 51PCh. 8 - Prob. 52PCh. 8 - Determine the smallest couple moment that can be...Ch. 8 - If P=250 N, determine the required minimum...Ch. 8 - Determine the minimum applied force P required to...Ch. 8 - Prob. 67PCh. 8 - Prob. 68PCh. 8 - Prob. 71PCh. 8 - Prob. 72PCh. 8 - Prob. 73PCh. 8 - Prob. 74PCh. 8 - Prob. 81PCh. 8 - Determine the horizontal force P that must be...Ch. 8 - A 180-lb farmer tries to restrain the cow from...Ch. 8 - The 100-lb boy at A is suspended from the cable...Ch. 8 - Prob. 87PCh. 8 - Determine the force P that must be applied to the...Ch. 8 - Prob. 93PCh. 8 - Prob. 98PCh. 8 - Prob. 99PCh. 8 - Blocks A and B have a mass of 7 kg and 10 kg,...Ch. 8 - The uniform bar AB is supported by a rope that...Ch. 8 - Prob. 102PCh. 8 - A 10-kg cylinder D, which is attached to a small...Ch. 8 - Prob. 106PCh. 8 - The collar bearing uniformly supports an axial...Ch. 8 - The collar bearing uniformly supports an axial...Ch. 8 - The floor-polishing machine rotates at a constant...Ch. 8 - Prob. 110PCh. 8 - Prob. 111PCh. 8 - Prob. 116PCh. 8 - The collar fits loosely around a fixed shaft that...Ch. 8 - Prob. 119PCh. 8 - Prob. 120PCh. 8 - Solve Prob. 8-120 if the force P is applied...Ch. 8 - Prob. 122PCh. 8 - Prob. 123PCh. 8 - Prob. 125PCh. 8 - The bell crank fits loosely into a 0.5-in-diameter...Ch. 8 - The bell crank fits loosely into a 0.5-in-diameter...Ch. 8 - Prob. 129PCh. 8 - R81. The uniform 20-lb ladder rests on the rough...Ch. 8 - R82. The uniform 60-kg crate C rests uniformly on...Ch. 8 - R83. A 35-kg disk rests on an inclined surface for...Ch. 8 - Prob. 4RPCh. 8 - Prob. 6RPCh. 8 - Prob. 7RPCh. 8 - The hand cart has wheels with a diameter of 80 mm....
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- We have a feed that is a binary mixture of methanol and water (60.0 mol% methanol) that issent to a system of two flash drums hooked together. The vapor from the first drum is cooled,which partially condenses the vapor, and then is fed to the second flash drum. Both drumsoperate at 1.0 atm and are adiabatic. The feed to the first drum is 1000 kmol/hr. We desire aliquid product from the first drum that is 35.0 mol% methanol. The second drum operates at afraction vaporized of (V/F)2 = 0.25.(a) Find the liquid flow rate leaving the first flash drum, L1 (kmol/hr). [286 kmol/hr](b) Find the vapor composition leaving the second flash drum, y2. [0.85]arrow_forward= The steel curved bar shown has rectangular cross-section with a radial height h = 6 mm and thickness b = 4mm. The radius of the centroidal axis is R = 80 mm. A force P = 10 N is applied as shown. Assume the steel modulus of 207,000 MPa and G = 79.3(103) MPa, repectively. elasticity and shear modulus E = Find the vertical deflection at point B. Use Castigliano's method for a curved flexural member and since R/h > 10, neglect the effect of shear and axial load, thereby assuming that deflection is due to merely the bending moment. Note the inner and outer radii of the curves bar are: r = 80 + ½ (6) = 83 mm, r₁ = 80 − ½ (6) = 77 mm 2 2 Sπ/2 sin² 0 d = √π/² cos² 0 d0 = Π 0 4 大 C R B Parrow_forwardThe steel eyebolt shown in the figure is loaded with a force F = 75 lb. The eyebolt is formed from round wire of diameter d = 0.25 in to a radius R₁ = 0.50 in in the eye and at the shank. Estimate the stresses at the inner and outer surfaces at section A-A. Notice at the section A-A: r₁ = 0.5 in, ro = 0.75 in rc = 0.5 + 0.125 = 0.625 in Ri 200 F FAarrow_forward
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- A steel tube, 2 m long, has a rectangular cross-section with outer dimensions of 20 × 30 mm and a uniform wall thickness of 1 mm. The tube is twisted along its length with torque, T. The tube material is 1018 CD steel with shear yield strength of Ssy =185 MPa. Assume shear modulus, G = 79.3GPa. (a) Estimate the maximum torque that can be applied without yielding.- (b) Estimate the torque required to produce 3 degrees total angle of twist over the length of the tube. (c) What is the maximum torque that can be applied without yielding, if a solid rectangular shaft with dimensions of 20 x 30 mm is used? You may use the exact solution:arrow_forward|The typical cruising altitude of a commercial jet airliner is 10,700 m above sea level where the local atmospheric temperature is 219 K, and the pressure is 0.25 bar. The aircraft utilizes a cold air-standard Brayton cycle as shown with a volume flow rate of 1450 m³/s. The compressor pressure ratio is 50, and the maximum cycle temperature is 1700 K. The compressor and turbine isentropic efficiencies are 90%. Neglect kinetic and potential energy effects in this problem. Assume constant specific heats with k=1.4, Ra=0.287 kJ/kg- K, Cp=1.0045 kJ/kg-K, and cv = 0.7175 kJ/kg-K. a) Draw a T-s diagram for this cycle on the diagram provided. b) Fill in the table below with the missing information. T[K] Heat exchanger Heat exchanger State P [bar] 1 0.25 2s 2 3 4s 4 Turbine c) (5pts) Determine the inlet air density in [kg/m³] (at state 1), and the system mass flowrate in [kg/s]. d) (10pts) Determine the net power developed in [MW]. Be sure to draw each component you are analyzing, define the…arrow_forwardOn the axis provide, draw a corresponding T-s diagram for the Brayton cycle shown given the following information: iv. V. vi. Compressor 1 is reversible, but Compressor 2 and the turbine are irreversible. The pressure drops through the regenerator are combustors are negligible. The pressures at state (1) and state (10) are equal to the atmospheric pressure. T 8 Regenerator fmm mmm Qin Combustor Compressor Compressor Turbine W cycle Intercooler mm Courarrow_forward
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