Determine the specific volume of superheated water vapor at 3.5 MPa and 450C based on (a) The ideal-gas equation, (b) The generalized compressibility chart, and (c) The steam tables. Deter mine the...
A 20 half-angle wedge is mounted at 0 angle of attack in the test section of a supersonic wind tunnel. When the tunnel is operating, the wave angle from the wedge leading edge is measured to be 41.8....
Using the Prandtl-Glauert rule, calculate the lift coefficient for an NACA 2412 airfoil at 5 angle of attack in a Mach 0.6 free stream. (Refer to Fig. 4.5 for the original airfoil data.)
Rhenium has an HCP crystal structure, an atomic radius of 0.137 nm, and a c/a ratio of 1.615. Compute the volume of the unit cell for Re.
A solution was prepared from 10.0 mL of 0.100 M cacodylic acid and 10.0 mL of 0.0800 M NaOH. To this mixture was added 1.00 mL of 1.27 10-6 M morphine. Calling morphine B, calculate the fraction of...
The strength and stability of tires may be enhanced by heating both sides of the rubber (k = 0.14 W/m K. a = 6.35 x 10-8 m2/s) in a steam chamber for which T = 200C. In the heating process, a...
A sulfuric acid solution is labeled 8N (where IN = 1 g-equivalent /L, and I mol of H2SO4 contains two g-equivalents). The specific gravity of the solution is 1.230, and its heat capacity is 3.00 J/...
Assume that the composite described in Problem 16.8 has a cross-sectional area of 320 mm2 (0.50 in.2) and is subjected to a longitudinal load of 44,500 N (10,000lbf). (a) Calculate the fibermatrix...
Consider the titration of 25.00 mL of 0.08230 M KI with 0.051 10 M AgNO3. Calculate pAg+ at the following volumes of added AgNO3: (a) 39.00 mL; (b) Ve; (c) 44.30 mL.
A thin, flat plate that is 0.2 m by 0.2 m on a side with extremely rough top and bottom surfaces is placed in a wind tunnel so that its surfaces are parallel to an atmospheric air stream having a...
A thermosyphon consists of a closed container that absorbs heat along its boiling section and rejects heat along its condensation section. Consider a thermosyphon made from a thin-walled mechanically...
Draw the free-body diagram of the sphere of weight W resting between the smooth inclined planes. Explain the significance of each force on the diagram. Given: W = 10 lb 1 = 105 deg 2 = 45 deg B
A worker tries to move a rock by applying a 360-N force to a steel bar as shown. (a) Replace that force with an equivalent force-couple system at D. (b) Two workers attempt to move the same rock by...
A section of track for a roller coaster consists of two circular arcs AB and CD joined by a straight portion BC. The radius of AB is 27 m and the radius of CD is 72 m. The car and its occupants, of...
Ninety kilograms of sodium nitrate is dissolved in 110 kg of water. When the dissolution is complete (at time r = 0), pure water is fed to the tank at a constant rate m (kg/min), and solution is...
A steel rod is bent into a semicircular ring of radius 36 in. and is supported in part by cables BD and BE which are attached to the ring at B. Knowing that the tension in cable BE is 60 lb,...
A double-scissor lift table is used to raise a 450-kg machine component. The table consists of a platform and two identical linkages on which hydraulic cylinders exert equal forces. (Only one linkage...
A furnace is constructed in three sections, which include insulated circular (2) and cylindrical (3) sections, as well as an intermediate cylindrical section (1) with imbedded electrical resistance...
How many moles of HCl can be produced from 0.226 g of SOCl2? SOCl2() + H2O() ( SO2(g) + 2HCl(g)
Three couple moments act on the pipe assembly. Determine the magnitude of M3 and the bend angle θ so that the resultant couple moment is zero. Given: θ1 = 45 deg M1 = 900 N m M2 = 500 N m...
The sleepy Barber Problem. A barbershop is designed so that there is a private room that contains the barber chair and an adjoining waiting room with a sliding door that contains N chairs (see Figure...
The drum has a weight of 100 lb and rests on the floor for which the coefficient of static friction is ? s = 0.6. If a = 2 ft and b = 3 ft, determine the smallest magnitude of the force P that will...
Solve Prob. 442 using Castiglianos theorem. Prob. 442, For the cantilevered handle in Prob. 441, let Fx = 150 lbf, Fy = 0 lbf, Fz = 100 lbf. Find the deflection at the tip along the x axis. In Prob....
Knowing that P = 210 N, replace the three couples with a single equivalent couple, specifying its magnitude and the direction of its axis.
Estimate the specific enthalpy of steam (kJ/kg) at 350C and 100 bar relative to steam at 100C and 1 atm using: (a) The steam tables. (b) Table B.2 and assuming ideal gas behavior. What is the...
Spectroscopic data for the indicators thymol blue (TB), semithymol blue (STB), and methylthymol blue (MTB) are shown in the table. A solution of TB, STB, and MTB in a 1.000-cm cuvet had absorbances...
For the network of Fig. 2.165, sketch vo and determine Vdc. 2.2 k V110 V (rms) IdelV
A marker for a garden path consists of a truncated regular pyramid carved from stone of density 2570 kg/m3. The pyramid is mounted on a steel base of thickness h. Knowing that the density of steel is...
Packages are thrown down an incline at A with a velocity of 4 ft/s. The packages slide along the surface ABC to a conveyor belt which moves with a velocity of 8 ft/s. Knowing that k = 0.25 between...
A stream of oxygen at 65C and 8.3 atm flows at a rate of 250 kg/h. Use the SRK equation of state to estimate the volumetric flow rate of this stream.
Air at 25C with a dew-point temperature of 0C flows past the open end of a vertical tube filled with liquid water maintained at 25C. The tube has an inside diameter of 0.83 in., and the liquid level...
A 285-lb uniform rectangular plate is supported in the position shown by hinges A and B and by cable DCE which passes over a frictionless hook at C. Assuming that the tension is the same in both...
A 2-mm-diameter electrical wire is insulated by a 2-mm-thick rubberized sheath (k = 0.13 W/m K), and the wire/sheath interface is characterized by a thermal contact resistance of R c = 3 X 10 -4 m 2...
A small sphere of weight W is held as shown by two wires AB and CD. Ifwire AB is cut, determine the tension in the other wire(a) Before AB is cut,(b) Immediately after AB has beencut. A 50 B 70 D
Calculate the voltage gain of each stage and the overall ac voltage gain for the BJT cascade amplifier circuit of Fig. 5.176. +15 V 5.1 kQ 24 k 5.1 k 24 k2 0.5 HF If 0.5 pF - 150 6.2 k2 6.2 kQ 50 uF
An insulated pistoncylinder device contains 2 L of saturated liquid water at a constant pressure of 150 kPa. An electric resistance heater inside the cylinder is turned on, and electrical work is...
A common arrangement for heating a large surface area is to move warm air through rectangular ducts below the surface. The ducts are square and located midway between the top and bottom surfaces that...
Consider a thin, symmetric airfoil at 1.5 angle of attack. From the results of thin airfoil theory, calculate the lift coefficient and the moment coefficient about the leading edge.
Steam enters an adiabatic turbine at 10 MPa and 500C and leaves at 10 kPa with a quality of 90 percent. Neglecting the changes in kinetic and potential energies, determine the mass flow rate required...
A 90-N force is applied to the control rod AB as shown. Knowing that the length of the rod is 225 mm, determine the moment of the force about point B by resolving the force into components along AB...
A liquid mixture containing 70.0 mol of n -pentane and 30.0 mol of n -hexane initially at 46?C is partially vaporized at P = 1 atm in a single-stage distillation apparatus (Rayleigh still). The heat...
Air at a flow rate of 12,000 scfm (60?F, 1 atm) and containing 0.5 mol% ethyl acetate (EA) and no water vapor is to be treated with activated carbon (C) (?b = 30 lb/ft3) with an equivalent particle...
A uniform slender rod of length h L = 900 mm and mass m = 1 kg hangs freely from a hinge at A. If a force P of magnitude 3.5 N is applied at B horizontally to the left (h = L), determine (a) The...
A shell-and-tube heat exchanger is to heat an acidic liquid that flows in un-finned tubes of inside and outside diameters D i = 10 mm and D o = 11 mm, respectively. A hot gas flows on the shell side....
A gear and shaft with nominal diameter of 1.5 in are to be assembled with a medium drive fit, as specified in Table 79. The gear has a hub, with an outside diameter of 2.5 in, and an overall length...
The maximum blood pressure in the upper arm of a healthy person is about 120 mm Hg. If a vertical tube open to the atmosphere is connected to the vein in the arm of the person, determine how high the...
A typical electric water heater has an efficiency of 90 percent and costs $390 a year to operate at a unit cost of electricity of $0.08/kWh. A typical heat pump-powered water heater has a COP of 2.2...
An aqueous solution containing 85.0 wt% H2SO4 at 60F (specific gravity = 1.78) is diluted with pure liquid water at the same temperature. The feed solution volume is 350 mL. The mixing may be...
In large steam power plants, the feedwater is frequently heated in closed feedwater heaters, which are basically heat exchangers, by steam extracted from the turbine at some stage. Steam enters the...
Falling sphere in Newton's drag-law region, a sphere initially at rest at z = 0 falls under the influence of gravity. Conditions are such that, after a negligible interval, the sphere falls with a...
If L = 9m, the beam will fail when the maximum shear force is V max = 5kN or the maximum bending moment is M max = 3kN m. Determine the magnitude M0 of the largest couple moments it will support.
One thousand kilomoles per hour of rich gas at 70F with 25% C1, 15% C2,25% C3, 20% nC4, and 15% nC5 by moles is to be absorbed by 500 kmol/h of nC10 at 90F in an absorber operating at 4 atm....
A simplified version of the life cycle of grocery sacks is shown below. 4 In the late 1970s, supermarkets began to replace paper sacks with polyethylene (plastic) sacks. In the 1980s, a movement to...
Saturated water vapor leaves a steam turbine at a flow rate of 1.5 kg/s and a pressure of 0.51 bar. The vapor is to be completely condensed to saturated liquid in a shell-and-tube heat exchanger that...
Species A is evaporating from a flat surface into species B. Assume that the concentration profile for species A in the concentration boundary layer is of the form CA(y) = Dy2 + Ey + F, where D, E,...
Barium sulfate is reduced with carbon as part of the manufacture of lithopone, a white pigment: 2 BaSO4 (s) + 4 C (s) 2BaS (s) + 4 CO2 (g) A mixture of crushed barite (an ore containing xB kg...
Two discrete-time systems T1 and T2 are connected in cascade to form a new system T as shown in figure. Prove or disprove the following statements. (a) If T1 and T2 are linear, than T is linear...
A 4-L rigid tank contains 2 kg of saturated liquidvapor mixture of water at 50°C. The water is now slowly heated until it exists in a single phase. At the final state, will the water be in the...
A pistoncylinder device initially contains 0.6 kg of steam with a volume of 0.1 m3. The mass of the piston is such that it maintains a constant pressure of 800 kPa. The cylinder is connected through...
Air enters the compressor of a regenerative gas-turbine engine at 300 K and 100 kPa, where it is compressed to 800 kPa and 580 K. The regenerator has an effectiveness of 72 percent, and the air...
A counter flow, concentric tube heat exchanger used for engine cooling has been in service for an extended period of time. The heat transfer surface area of the exchanger is 5 m 2 , and the design...
Vapor-liquid equilibrium data in mole fractions for the system acetone-air-water at 1 atm (101.3 Pa) are as follows: (a) Plot the data as (1) a graph of moles acetone per mole air versus moles...
If the resultant force acting on the bracket is FR = {? 300i + 650j + 250k} N, determine the magnitude and coordinate direction angles of F. 45 30- F= 750 N
In a circus act, an aerialist performs a handstand on a wheel while being pulled across a high wire ABC of length 8 m by another performer as shown. Knowing that the aerialist weighs 720 N and is...
Chilled ethylene glycol (sp gr = 1.11) is pumped through the shell side of a condenser and a control valve at a nominal flow rate of 200 gal/min. The total pressure drop over the entire system is...
Determine the components of the reactions at A and E when a 320-N force directed vertically downward is applied (a) At B, (b) At D. 100 mm IB 400 mm E (O 250 mm
The thermal conductivity and surface emissivity of a material may be determined by heating its bottom surface and exposing its top surface to quiescent air and large surroundings of equivalent...
A natural convection air heater consists of an array of parallel, equally spaced vertical plates, which may be maintained at a fixed temperature Ts by embedded electrical heaters. The plates are of...
Three identical small spheres, each of weight 2 lb, can slide freely on a horizontal frictionless surface. Spheres B and C are connected by a light rod and are at rest in the position shown when...
Dry ice (solid CO2) has been used as a mine explosive in the following manner. A hole is drilled into the mine wall, filled with dry ice plus a small charge of gunpowder, and then plugged. The...
An aqueous solution of potassium hydroxide is fed at a rate of 875 kg/h to an evaporative crystallizer operating at 10C, producing crystals of KOH 2 H 2 O. A 5 g aliquot of the feed solution is...
In Problem 14.37, NO 2 transport by diffusion in a stagnant atmosphere was considered for steady-state conditions. However, the problem is actually time dependent, and a more realistic approach would...
The bolt is subjected to the force F, which has components acting along the x, y, z axes as shown. If the magnitude of F is 80 N, and ? = 60? and ? = 45?, determine the magnitudes of its components....
The jet pump in Fig P3.36 injects water at U1 = 40 m/s through a 3-in pipe and entrains a secondary flow of water U2 = 3 m/s in the annular region around the small pipe. The two flows become fully...
A Fink roof truss is loaded as shown. Determine the force in members FH, FG, and EG. 50 LI11.13
Each cable of the side spans of the Golden Gate Bridge supports a load w = 10.2 kips/ft along the horizontal. Knowing that for the side spans the maximum vertical distance h from each cable to the...
Consider a U-tube whose arms are open to the atmosphere. Now water is poured into the U-tube from one arm, and light oil (r = 790 kg/m3) from the other. One arm contains 70-cm-high water, while the...
As noted in Problem 5.3, microwave ovens operate by rapidly aligning and reversing water molecules within the food, resulting in volumetric energy generation and, in turn, cooking of the food. When...
A 73-kg gymnast is executing a series of full-circle swings on the horizontal bar. In the position shown he has a small and negligible clockwise angular velocity and will maintain his body straight...
A gas stream consisting of n-hexane in methane is fed to a condenser at 60C and 1.2 atm. The dew point of the gas (considering hexane as the only condensable component) is 55C. The gas is cooled to...
A vertical column of A36 structural steel (Sy = 36 kpsi, Sut = 5880 kpsi) is 10 in wide. An attachment has been designed to the point shown in the figure. The static load of 20 kip is applied, and...
An electric immersion heater, 10 mm in diameter and 300 mm long, is rated at 550 W. If the heater is horizontally positioned in a large tank of water at 20C, estimate its surface temperature....
A 50-lb cabinet is mounted on casters that allow it to move freely ( = 0) on the floor. If a 25-lb force is applied as shown, determine (a) The acceleration of the cabinet, (b) The range of values of...
Thermal conductivity and Prandtl number of a polyatomic gas. (a) Estimate the thermal conductivity of CH 4 at 1500K and 1.37 atm. The molar heat capacity at constant pressure 4 at 1500K is 20.71...
An engine oil cooler consists of a bundle of 25 smooth tubes, each of length L = 2.5 m and diameter D = 10 mm. (a) If oil at 300 K and a total flow rate of 24 kg/s is in fully developed flow through...
Consider flow over a flat plate for which it is desired to determine the average heat transfer coefficient over the short span x1 to x2, h1 2 where (x2 x1) Provide three different expressions that...
Consider the following transfer function: (a) What is the steady-slate gain? (b) What is the time constant? (c) If U(s) = 2/s, what is the value of the output y(t) when t ? ?? (d) For the same U(s),...
The composite wall of an oven consists of three materials, two of which are of known thermal conductivity, k A = 20 W/m K and kc = 50 W/m K, and known thickness, LA = 0.30 m and Lc = 0.15 m. The...
Engine oil flows through a 25-mm-diameter tube at a rate of 0.5 kg/so The oil enters the tube at a temperature of 25C, while the tube surface temperature is maintained at 100C. (a) Determine the oil...
An offset tensile link is shaped to clear an obstruction with a geometry as shown in the figure. The cross section at the critical location is elliptical, with a major axis of 3 in and a minor axis...
An insulated vertical piston - cylinder device initially contains 0.11 m3 of air at 150 kPa and 22C. At this state, a linear spring touches the piston but exerts no force on it. The cylinder is...
An open tubular column is 30.1 m long and has an inner diameter of 0.530 mm. It is coated on the inside wall with a layer of stationary phase that is 3.1 m thick. Unretained solute passes through in...
Find the power absorbed by the network shown. 21 V 12 k 18 k
A solar collector consists of a parallel plate channel that is connected to a water storage plenum at the bottom and to a heat sink at the top. The channel is inclined 0 = 30 from the vertical and...
A long plastic rod of 30-mm diameter (k = 0.3 W/m K and pc p = 1040kJ/m 3 K) is uniformly heated in an oven as preparation for a pressing operation. For best results, the temperature in the rod...
Repeat Prob. 819 with the bottom aluminum plate replaced by one that is 20 mm thick. Repeat Prob. 819, A 30-mm thick AISI 1020 steel plate is sandwiched between two 10-mm thick 2024-T3 aluminum...
The compartment heater of an automobile exchanges heat between warm radiator fluid and cooler outside air, the flow rate of water is large compared to the air, and the effectiveness, , of the heater...
An opaque surface with the prescribed spectral, hemispherical reflectivity distribution is subjected to the spectral irradiation shown. (a) Sketch the spectral hemispherical absorptivity...
Saturated-liquid feed, of F = 40 mollh, containing 50 mol% A and B is supplied continuously to the apparatus shown in Figure. The condensate from the condenser is split so that half of it is returned...
The rectangular platform is hinged at A and B and is supported by a cable that passes over a frictionless hook at E. Knowing that the tension in the cable is 1349 N, determine the moment about each...