Air at a pressure of 1 atm and a temperature of 50C is in parallel flow over the top surface of a flat plate that is heated to a uniform temperature of 100C. The plate has a length of 0.20 m (in the...

In severe head-on automobile accidents a deceleration of 60 gs or more (1g = 32.2 ft/s2) often result in a fatality where force, in lbf, acts on a child whose mass is 50 lb, when subjected to a...

A gas stream containing 40.0mole% hydrogen, 35.0% carbon monoxide, 20.0% carbon dioxide, and 5.0% methane is cooled from 1000C to 10C at a constant absolute pressure of 35.0 atm. Gas enters the...

An automobile travels to the right at a constant speed of 80 km/h. If the diameter of the wheel is 560 mm, determine the velocities of points B, C, D, and E on the rim of the wheel. D 30 B a 90 E 560...

The gas stream from a sulfur burner consists of 15 mol-% SO2, 20 mol-% O2, and 65 mol-% N2. The gas stream at atmospheric pressure and 400(C enters a catalytic converter A here 86% of the SO2 is...

Determine the tension developed in cables AB, AC, and AD required for equilibrium of the 75-kgcylinder. BE 2 m 2 m 15 m

Water flows through a circular nozzle, exits into the air as a jet, and strikes a plate. The force required to hold the plate steady is 70 N. Assuming frictionless one-dimensional flow, estimate (a)...

Derive the transient, two-dimensional finite-difference equation for the temperature at nodal point 0 located on the boundary between two different materials. Material A Ay kA. PAI CA Ax=Ay Material...

A supersonic flow at M 1 = 3, T 1 = 285 K, and p 1 = 1atm is deflected upward through a compression corner with 0 = 30.6 and then is subsequently expanded around a corner of the same angle such that...

A force F is applied at the top of the tower at A. if it acts in the direction shown such that one of its components lying in the shaded y-z plane has a magnitude of 80 lb, determine its magnitude F...

The tooth numbers for the gear train illustrated are N2 = 20, N3 = 16, N4 = 30, N6 = 36, and N7 = 46. Gear 7 is fixed. If shaft a is turned through 10 revolutions, how many turns will shaft bmake? 6...

A machine part will be cycled at 48 kpsi for 4 (103) cycles. Then the loading will be changed to 38 kpsi for 6 (104) cycles. Finally, the load will be changed to 32 kpsi. How many cycles of operation...

A 10 wedge is used to split a section of a log. The coefficient of static friction between the wedge and the log is 0.35. Knowing that a force P of magnitude 600 lb was required to insert the wedge,...

A thin-walled tube with a diameter of 6 mm and length of 20 m is used to carry exhaust gas from a smoke stack to the laboratory in a nearby building for analysis. The gas enters the tube at 200C and...

The following transfer function is not written in a standard form (a) Put ii in standard gain/time constant form. (b) Determine the gain, poles and zeros. (c) If the time-delay term is replaced by a...

Repeat Prob. 215 assuming the material to be cast iron. Repeat Prob. 215, Brinell hardness tests were made on a random sample of 10 steel parts during processing. The results were HB values of 230,...

In a particular application involving airflow over a heated surface, the boundary layer temperature distribution may be approximated as where y is the distance normal to the surface and the Prandtl...

Consider an airfoil in a wind tunnel (i.e., a wing that spans the entire test section). Prove that the lift per unit span can be obtained from the pressure distributions on the top and bottom walls...

Freeze drying is a technique for dehydrating substances at low temperatures, thereby avoiding the degradation that may accompany heating. The material to be dried is cooled to a temperature at which...

The spectral transmissivity of a 1-mm-thick layer of liquid water can be approximated as follows: (a) Liquid water can exist only below its critical temperature, Tc = 647.3 K. Determine the maximum...

A saturated-vapor mixture of maleic anhydride and benzoic acid containing 10 mol% acid is a by-product of the manufacture of phthalic anhydride. This mixture is distilled continuously at 13.3 kPa to...

Gaseous E10 fuel is 10 percent ethanol (C2H6O) and 90 percent octane (C8H18) on a kmol basis. This fuel is burned with 110 percent theoretical air. During the combustion process, 90 percent of the...

Use activity coefficients to calculate the pH after 10.0 mL of 0.100 M trimethylammonium bromide were titrated with 4.0 mL of 0.100 M NaOH.

A 120-lb pilot flies a jet trainer in a half vertical loop of 3600-ft radius so that the speed of the trainer decreases at a constant rate. Knowing that the pilot??s apparent weights at points A and...

A glass window of width W = 1 m and height H = 2 m is 5 mm thick and has a thermal conductivity of kg = 1.4 W/m. K if the inner and outer surface temperatures of the glass are 15C and -20e,...

A baseball player catching a ball can soften the impact by pulling his hand back. Assuming that a 5-oz ball reaches his glove at 96 mi/h and that the player pulls his hand back during the impact at...

An insulated rigid tank contains 4 kg of argon gas at 450 kPa and 30°C. A valve is now opened, and argon is allowed to escape until the pressure inside drops to 200 kPa. Assuming the argon...

A homeowner, whose water pipes have frozen during a period of cold weather, decides to melt the ice by passing an electric current I through the pipe wall. The inner and outer radii of the wall are...

Steep safety ramps are built beside mountain highways to enable vehicles with defective brakes to stop. A 10-ton truck enters a 15? ramp at a high speed v0 = 108 ft/s and travels for 6 s before its...

A fractionating column equipped with a partial reboiler heated with steam, as shown in Figure 7.40, and with a total condenser, is operated continuously to separate a mixture of 50 mol% A and 50 mol%...

The contact point between the femur and tibia bones of the leg is at A. If a vertical force of 175 lb is applied at this point, determine the components along the x and y axes. Note that the y...

Determine the magnitude and orientation, measured counterclockwise from the positive y axis, of the resultant force acting on the bracket. Given: FA = 700 N FB = 600 N θ = 20 deg φ = 30 deg...

The 5-mm-thick bottom of a 200-mm-diameter pan may be made from aluminum (k = 240 W/m. K) or copper (k = 390 W/m. K). When used to boil water, the surface of the bottom exposed to the water is...

A transmission tower is held by three guy wires attached to a pin at A and anchored by bolts at B, C, and D. Knowing that the tower exerts on the pin at A an upward vertical force of 8 kN, determine...

If the coefficient of static friction between all the surfaces of contact is s, determine the force P that must be applied to the wedge in order to lift the brace that supports the load F. N' PNA B....

A tool used for fabricating semiconductor devices consists of a chuck (thick metallic, cylindrical disk) onto which a very thin silicon wafer (p = 2700 kg/m 3 c = 875 J/kg K, k = 177 W/m K) is...

A pistoncylinder device contains 0.15 kg of air initially at 2 MPa and 350C. The air is first expanded isothermally to 500 kPa, then compressed polytropically with a polytropic exponent of 1.2 to the...

A two-dimensional rectangular plate is subjected to prescribed temperature boundary conditions on three sides and a uniform heat flux into the plate at the top surface. Using the general approach of...

One thousand liters of a 95 wt% glycerol5% water solution is to be diluted to 60% glycerol by adding a 35% solution pumped from a large storage tank through a 5-cm ID pipe at a steady rate. The pipe...

A household refrigerator that has a power input of 450 W and a COP of 2.5 is to cool five large watermelons, 10 kg each, to 8C. If the watermelons are initially at 20C, determine how long it will...

In a particular application involving fluid flow at a rate nz through a circular tube of length L and diameter D, the surface heat flux is known to have a sinusoidal variation with x, which is of the...

Consider a diamond-wedge airfoil such as shown in Figure 9.24, with a half-angle = 10. The airfoil is at an angle of attack = 15 to a Mach 3 free stream. Using linear theory, calculate the lift and...

One kilogram of water (V1 = 1.003 cm3 kg-1) in a piston / cylinder device at 25oC and 1 bar is compressed in a mechanically reversible, isothermal process to 1.500 bar. Determine Q, W. (U, (H, and (5...

Air enters a 40-cm-diameter cooling section at 1 atm, 32°C, and 30 percent relative humidity at 18 m/s. Heat is removed from the air at a rate of 1200 kJ/min. Determine (a) the exit temperature,...

For an 85 wt% Pb-15 wt% Mg alloy, make schematic sketches of the microstructure that would be observed for conditions of very slow cooling at the following temperatures: 600C (1110F), 500C (930F),...

Compute the elastic moduli for the following polymers, whose stress-strain behaviors may be observed in the "Tensile Tests" module of Virtual Materials Science and Engineering (VMSE): (a)...

From the diagrams of 2p and 3p orbitals in Fig.19 and Fig.20, respectively, draw a rough graph of the square of the wave function for these orbitals in the direction of one of the lobes. Figure 12.19...

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 MPa and -10C at a rate of 0.12 kg/s, and it leaves at 0.7 MPa and 50C. The refrigerant is cooled in the condenser...

Rod AB moves over a small wheel at C while end A moves to the right with a constant velocity vA. Using the method of Sec. 15.9, derive expressions for the angular velocity and angular acceleration of...

Two intermetallic compounds, AB and AB2, exist for elements A and B. If the compositions for AB and AB2 are 34.3 wt% A65.7 wt% B and 20.7 wt% A79.3 wt% B, respectively, and element A is potassium,...

The space truss is supported by a ball-and-socket joint at D and short links at C and E. Determine the force in each member and state if the members are in tension or compression. Take F1 = {-500k}...

Draw the shear and moment diagrams for the beam. Units Used: kN = 103 N Given: w = 3 kN/m F = 10kN L = 6 m

A memory manager for a variable-sized region strategy has a free list of blocks size 600, 400, 1000, 2200, 1600, and 1050 bytes. a. What block will be selected to honor a request for 1603 bytes using...

A surge tank system is to be installed as part of a pilot plant facility. The initial proposal calls for the configuration shown in figure. 4.3. Each tank is 5 ft high and 3 ft in diameter. The...

Flow between coaxial cylinders and concentric spheres. (a) The space between two coaxial cylinders is filled with an incompressible fluid at constant temperature. The radii of the inner and outer...

The Piper Cherokee (a light, single-engine general aviation aircraft) has a wing area of 170 ft 2 and a wing span of 32 ft. Its maximum gross weight is 24501b. The wing uses an NACA 65-415 airfoil,...

A 4-kg uniform slender rod AB is held in position by two ropes and the link CA which has a negligible weight. After rope BD is cut the assembly rotates in a vertical plane under the combined effect...

Consider the separation by distillation of a chlorination effluent to recover C2H5Cl. The feed is a bubble-point liquid at the column pressure of 240 psia with the following composition and K-values...

A 1.219-g sample containing (NH4)2SO4, NH4NO3, and nonreactive substances was diluted to 200 mL in a volumetric flask. A 50.00-mL aliquot was made basic with strong alkali, and the liberated NH3 was...

Hot combustion gases enter the nozzle of a turbojet engine at 260 kPa, 747°C, and 80 m/s, and they exit at a pressure of 85 kPa. Assuming an isentropic efficiency of 92 percent and treating the...

In the reservoir of a supersonic wind tunnel, the velocity is negligible, and the temperature is 1000 K. The temperature at the nozzle exit is 600 K. Assuming adiabatic flows through the nozzle;...

Two hundred kilograms per hour of an aqueous solution containing 20.0mole% sodium acetate (NaC2H3O2) enters an evaporative crystallizer at 60C. When the solution is exposed to the low pressure in the...

Draw the free-body diagram of member ABC which is supported by a smooth collar at A, roller at B, and short link CD. Explain the significance of each force acting on the diagram. (SeeFig) 2.5 kN 3 'm...

An air standard dual cycle has a compression ratio of 15 and a cutoff ratio of 1.5. At the beginning of compression, p1 = 1 bar and T1 = 290 K. The pressure doubles during the constant volume heat...

Twenty liters of liquid n-propyl benzoate (C6H5CO2C3H7, SG = 1021) and 15 liters of liquid benzene are mixed and heated from 25C to 75C. Calculate the required heat input (kJ), using Kopps rule when...

A natural gas containing 95 mole% methane and the balance ethane is burned with 20.0% excess air. The stack gas which contains no unburned hydrocarbons or carbon monoxide leaves the furnace at 900?C...

Nitrite ion, NO - 2 , is a preservative for bacon and other foods, but it is potentially carcinogenic. A spectrophotometric determination of NO - 2 makes use of the following reactions: Here is an...

Find vC(t) for t > 0 in the circuit in Fig. P6.65. t=0 iL 1 1H 1A

A cylinder of radius ro, length L, and thermal conductivity k is immersed in a fluid of convection coefficient hand unknown temperature T. At a certain instant the temperature distribution in the...

Bar AB rotates clockwise with a constant angular velocity of 8 rad/s and rod EF rotates clockwise with a constant angular velocity of 6 rad/s. Determine at the instant shown (a) The angular velocity...

A stream of air at 500C and 835torr with a dew point of 30C flowing at a rate of 1515 L/s is to be cooled in a spray cooler. A fine mist of liquid water at 25C is sprayed into the hot air at a rate...

A vertical force P = 10 lb is applied to the ends of the 2-ft cord AB and spring AC. If the spring has an unstretched length of 2 ft, determine the angle ? for equilibrium. Take k = 15 lb/ft. 2 ft-...

Sketch all the possible stereoisomers of (a) Tetrahedral [Cd(H2O)2Cl2], (b) Square-planar [IrCI2(PH3)2]- , (c) Octahedral [Fe(o-phen) 2CI2]+,

A pistoncylinder device initially contains 50 L of liquid water at 40C and 200 kPa. Heat is transferred to the water at constant pressure until the entire liquid is vaporized. (a) What is the mass of...

Compare the performance of C-SCAN and SCAN scheduling, assuming a uniform distribution of requests. Consider the average response time (the time between the arrival of a request and the completion of...

Is busy waiting always less efficient (in terms of using processor time) than a blocking wait? Explain.

Plug flow with forced-convection heat transfer. Very thick slurries and pastes sometimes move in channels almost as a solid plug. Thus, one can approximate the velocity by a constant value v 0 over...

One integrated circuit design calls for the diffusion of arsenic into silicon wafers; the background concentration of As in Si is 2.5 x 1020 atoms/m3. The predeposition heat treatment is to be...

A bar of a steel alloy that exhibits the stress-strain behavior shown in Figure is subjected to a tensile load; the specimen is 300 mm (12 in.) long, and of square cross section 4.5 mm (0.175 in.) on...

Atmospheric air enters the heated section of a circular tube at a flow rate of 0.005 kg/s and a temperature of 20C. The tube is of diameter D = 50 mm, and full developed conditions with h = 25 W/m 2 ...

Natural gas that contains methane, ethane, and propane is to be burned with humid air. The adiabatic flame temperature is to be calculated from specified values of the following quantities: ycH 4 ,...

A rectangular steel bar supports the two overhanging loads shown in the figure. Using superposition, find the deflection at the ends and at the center.

Knowing that the pulley has a radius of 60 mm, determine the components of the reactions at A and E. 450 mm 450 mm 600 mm 240 mm C

Batch processes are often used in chemical and pharmaceutical operations to achieve a desired chemical composition for the final product. Related heat transfer processes are typically transient,...

If the horizontal clamping force that the toggle clamp exerts on the smooth wooden block at E is NE = 200 N, determine the force applied to the handle of theclamp. 60 mm 50 mm 160 mm 75 mm

Consider the transmission case of Problem 1.23, but now allow for radiation exchange with the ground chassis, which may be approximated as large surroundings at Tsur = 30C. If the emissivity of the...

In the position shown, bar AB has an angular velocity of 4 rad/s clockwise. Determine the angular velocity of bars BD and DE. 250 mm B -200 mm 75 mm D E 150 mm

The cable at the end of the crane boom exerts a force of 250 lb on the boom as shown. Express F as a Cartesianvector. 70 30 F= 250 Ib

An escalator in a shopping center is designed to move 30 people, 75 kg each, at a constant speed of 0.8 m/s at 45 slope. Determine the minimum power input needed to drive this escalator. What would...

If it is assumed that the plot in figure is for noncold-worked brass, determine the grain size of the alloy in Figure 7.19; assume its composition is the same as the alloy in Figure 7.15. 140 120 900...

What is the practical significance of harmonic currents and imbalance between phases?

The temperature in the reservoir of a supersonic wind tunnel is 519R. In the test section, the flow velocity is 1385 ft/s. Calculate the test-section Mach number. Assume the tunnel flow is adiabatic.

A mixture of 20 wt% water 33% acetone and the remainder methyl isobutyl ketone is brought to equilibrium at 25C. If the total mass of the system is 1.2 kg, use the data in Figure 6.6.1 to estimate...

A vertical, thin pane of window glass that is 1 m on a side separates quiescent room air at T,i = 20C from quiescent ambient air at T.o = - 20C. The walls of the room and the external surroundings...

The physically realizable form of the PD transfer function is given in the first equation of Exercise 8.1.(a) Show how to obtain this transfer function with a parallel arrangement of two much simpler...

If the resultant force acting on the bracket is directed along the positive y axis, determine the magnitude of the resultant force and the coordinate direction angles of F so that ? = 500 N 30 F 600 N

A 2-hp electric motor running at 1720 rev/min is to drive a blower at a speed of 240 rev/min. Select a V-belt drive for this application and specify standard V belts, sheave sizes, and the resulting...

A Howe scissors roof truss is loaded as shown. Determine the force in members GI, HI, and HJ. TAN 1.5

Two rigid tanks are connected by a valve. Tank A is insulated and contains 0.2 m3 of steam at 400 kPa and 80 percent quality. Tank B is uninsulated and contains 3 kg of steam at 200 kPa and...

A 6-kg uniform cylinder can roll without sliding on a horizontal surface and is attached by a pin at point C to the 4-kg horizontal bar AB. The bar is attached to two springs, each of constant k =...