Determine the diffusivity of H2S in water, using the penetration theory, from the following data for the absorption of H2S into a laminar jet of water at 20?C. Jet diameter = 1 cm, Jet length = 7 cm,...

The figure shows a schematic drawing of a vehicular jack that is to be designed to support a maximum mass of 400 kg based on the use of a design factor nd = 2.50. The opposite-handed threads on the...

Determine the force in members GD, GE, and FD of the space truss and state if the members are in tension orcompression. |-500k) Ib (200j) Ib 6 ft 6 ft 4 ft 211

The crate shown is supported by three cables. Determine the weight of the crate knowing that the tension in cable AB is 3 kN. 12 m

The bent rod ABDE is supported by ball-and-socket joints at A and E and by the cable DF. If a 600-N load is applied at C as shown, determine the tension in the cable. 80 mtft 70 m 90 mm 600 N 110 mm...

In an absorption tower (or absorber), a gas is contacted with a liquid under conditions such that one or more species in the gas dissolve in the liquid. A stripping tower (or stripper) also involves...

The great Boston molasses flood occurred on January 15, 1919. In it, 2.3 million gallons of crude molasses flowed from a 30-foot high storage tank that ruptured, killing 21 people and injuring 150....

Convert the (010) and (101) planes into the four-index MillerBravais scheme for hexagonal unit cells.

A furnace wall is to be constructed of brick having standard dimensions 9 by 4.5 by 3 in. Two kinds of material are available. One has a maximum usable temperature of 1900?F and a thermal...

In a manufacturing operation, three holes are drilled simultaneously in a work piece. Knowing that the holes are perpendicular to the surfaces of the work piece, replace the couples applied to the...

The portion of truss shown represents the upper part of a power transmission line tower. For the given loading, determine the force in each of the members located above HJ. State whether each member...

Ralph Rack straw your next-door neighbor, surprised his wife last January by having a hot tub installed in their back yard while she was away on a business trip. It surprised her, all right, but...

A tracer is used to characterize the degree of mixing in a continuous stirred tank. Water enters and leaves the mixer at a rate of V (m 3 /min). Scale has built up on the inside walls of the tank, so...

A force of F = 100 lb holds the 400-lb crate in equilibrium. Determine the coordinates (0, y, z) of point A if the tension in cords AC and AB is 700 lbeach. T 401 -Sa B

A solution containing acetic acid, oxalic acid, ammonia, and pyridine has a pH of 9.00. What fraction of ammonia is not protonated?

The square-threaded worm gear shown has a mean radius of 1.5 in. and a lead of 0.375 in. The larger gear is subjected to a constant clockwise couple of 7.2 kip ⋅in. Knowing that the coefficient...

Using the y-x and T-y-x diagrams in Figures 4.3 and 4.4, determine the temperature, amounts, and compositions of the equilibrium vapor and liquid phases at 101 kPa for the following conditions with a...

A heat pump receives heat from a lake that has an average winter time temperature of 6°C and supplies heat into a house having an average temperature of 27°C. (a) If the house loses heat to...

Measurements show that steady-state conduction through a plane wall without heat generation produced a convex temperature distribution such that the mid- point temperature was 6.To higher than...

A mixing process consists of a single stirred-tank instrumented as shown in figure. The concentration of a single species A in the feed stream varies. The controller attempts to compensate for this...

Neohetramine, C16H21ON4 (285.37 g/mol), is a common antihistamine. A 0.1247-g sample containing this compound was analyzed by the Kjeldahl method. The ammonia produced was collected in H3BO3-; the...

A 0.25-m3 insulated pistoncylinder device initially contains 0.7 kg of air at 20°C. At this state, the piston is free to move. Now air at 500 kPa and 70°C is allowed to enter the cylinder...

When a liquid or a gas occupies a volume, it may be assumed to fill the volume completely. On the other hand, when solid particles occupy a volume, there are always spaces (voids) among the...

The antenna tower is supported by three cables. If the forces of these cables acting on the antenna are FB = 520 N, FC = 680 N, and FD = 560 N, determine the magnitude and coordinate direction angles...

The crate of weight W is hoisted using the ropes AB and AC. Each rope can withstand a maximum tension T before it breaks. If AB always remains horizontal, determine the smallest angle θ to...

A pistoncylinder device contains 0.1 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 800 kPa. Heat is transferred at constant pressure until the temperature reaches 350°C. (a) What...

Wet air containing 4.0mole% water vapor is passed through a column of calcium chloride pellets. The pellets adsorb 97.0% of the water and none of the other constituents of the air. The column packing...

Wet steam at 1,100 kPa expands at constant enthalpy (as in a throttling process) to 101.33 kPa, where its temperature is 105oC. What is the quality' of the steam in its initial state?

Draw the shear and moment diagrams for the cantileverbeam. 2 kN /m 6 kN - m

Exhaust gases from a wire processing oven are discharged into a tall stack, and the gas and stack surface temperatures at the outlet of the stack must be estimated. Knowledge of the outlet gas...

A furnace has the form of a truncated conical section, as shown in the schematic. The floor of the furnace has an emissivity of ? 1 = 0.7 and is maintained at 1000 K with a heat flux of 2200 W/m 2 ....

Consider a plane composite wall that is composed of two materials of thermal conductivities k A = 0.1 W/m K and k B = 0.04 W/m K and thicknesses L A = 10 mm and L B = 20 mm. The contact resistance...

The motion of rod AB is guided by pins attached at A and B which slide in the slots shown. At the instant shown, n, = 0? and the pin at B moves upward to the left with a constant velocity of 150...

A single-threaded 25-mm power screw is 25 mm in diameter with a pitch of 5 mm. A vertical load on the screw reaches a maximum of 6 kN. The coefficients of friction are 0.05 for the collar and 0.08...

A truss supports the loading shown. Determine the equivalent force acting on the truss and the point of intersection of its line of action with a line through points A and G. -Sn 300 N

The bucket of the front-end loader shown carries a 12-kN load. The motion of the bucket is controlled by two identical mechanisms, only one of which is shown. Knowing that the mechanism shown...

Air flows steadily through an adiabatic turbine, entering at 150 psia, 900°F, and 350 ft/s and leaving at 20 psia, 300°F, and 700 ft/s. The inlet area of the turbine is 0.1 ft2. Determine (a)...

A long rod of 60-mm diameter and thermo physical properties P = 8000 kg/m 3 , c = 500 J/kg K, and k = 50 W/m K is initially at a uniform temperature and is heated in a forced convection furnace...

The pressure in an automobile tire depends on the temperature of the air in the tire. When the air temperature is 25°C, the pressure gage reads 210 kPa. If the volume of the tire is 0.025 m3,...

Consider atmospheric air at 25C and a velocity of 25 m/s flowing over both surfaces of a 1-m-long flat plate that is maintained at 125e. Determine the rate of heat transfer per unit width from the...

A gas containing nitrogen, benzene, and toluene is in equilibrium with a liquid consisting of 35 mole% benzene and 65 mole% toluene at 85C and 10 atm. Estimate the gas composition (mole fractions)...

To augment heat transfer between two flowing fluids it is proposed to insert a 100-mm-long, 5-mm-diameter 2024 aluminum pin fin through the wall separating the two fluid. The pin is inserted to a...

Determine the shape factor, F 12 for the rectangles shown. (a) Perpendicular rectangles (b) Parallel rectangles of without common edge unequal areas. 3 m 6 m - 0.5 m 2. -1 m-

An overhead door is guided by wheels at A and B that roll in horizontal and vertical tracks. Knowing that when en = 40o the velocity of wheel B is 0.6 m/s upward, determine (a) The angular velocity...

The feed to an ammonia synthesis reactor contains 25 mole % nitrogen and the balance hydrogen. The flow rate of the stream is 3000 kg/h. Calculate the rate of flow of nitrogen into the reactor in...

The unit cell for Cr2O3 has hexagonal symmetry with lattice parameters a = 0.4961 nm and c = 1.360 nm. If the density of this material is 5.22 g/cm3, calculate its atomic packing factor. For this...

The fatigue data for a ductile cast iron are given as follows: (a) Make an S?N plot (stress amplitude versus logarithm cycles to failure) using these data. (b) What is the fatigue limit for this...

A ventilation system has been designed for a large laboratory with a volume of 1100 m3. The volumetric flow rate of ventilation air is 700 m3/min at 22C and 1 atm. (The latter two values may also be...

The towline exerts a force of P = 4 kN at the end of the 20-m-long crane boom. If u = 30?, determine the placement x of the hook at A so that this force creates a maximum moment about point O. What...

A storage tank containing oil (SG = 0.92) is 10.0 meters high and 16.0 meters in diameter. The tank is closed, but the amount of oil it contains can be determined from the gauge pressure at the...

A certain gas has a molecular weight of 30.0 a critical temperature of 310K. and a critical pressure of 4.5MPa. Calculate the density in kg/m3 of this gas at 465 K and 9.0MPa (a) If the gas is ideal...

Humid air at 50C and 1.0 atm with 2C of super heat is fed to a condenser. Gas and liquid streams leave the condenser in equilibrium at 20C and 1 atm. (a) Assume a basis of calculation of 100 mol...

A common procedure for increasing the moisture content of air is to bubble it through a column of water. Assume the air bubbles to be spheres of radius r 0 = 1 mm and to be in thermal equilibrium...

Two beams are connected together by the short link BC. Determine the components of reaction at the fixed support A and at pinD. 12 kN 10 KN FA 1.5 m 1.5 m

Consider the three-surface enclosure shown. The lower plate (A 1 ) is a black disk of 200-mm diameter and is supplied with a heat rate of 10,000 W. The upper plate (A 2 ) a disk coaxial to A J, is a...

A rigid vessel contains 2 kg of refrigerant-134a at 800 kPa and 120C. Determine the volume of the vessel and the total internal energy. Answers: 0.0753 m3, 655.7 kJ

A counter-rotating eccentric mass exciter consisting of two rotating 3.5-oz weights describing circles of radius r at the same speed but in opposite senses is placed on a machine element to induce a...

A balloon 20m in diameter is filled with helium at a gauge pressure of 2.0atm. A man is standing in a basket suspended from the bottom of the balloon. A restraining cable attached to the basket keeps...

A Thomas flow meter is a device in which heat is transferred at a measured rate from an electric coil to a flowing fluid, and the flow rate of the stream is calculated from the measured temperature...

Sodium hydroxide is dissolved in enough water to make up a 20.0 mole% solution. If the NaOH and water are initially at 77F (25C), how much heat (Btu/lb product solution) must be removed for the...

A shell-and-tube heat exchanger with one shell pass and two tube passes is used as a regenerator, to preheat milk before it is pasteurized. Cold milk enters the regenerator at T c,i = 5?C, while hot...

Water at a flow rate of m = 0.215 kg/s is cooled from 70C to 30C by passing it through a thin-walled tube of diameter D = 50 mm and maintaining a coolant at T = 15C in cross flow over the tube. (a)...

The flow rate required to yield a specified reading on an orifice meter varies inversely as the square root of the fluid density; that is, if a fluid with density p 1 (gfcm 3 ) flowing at a rate V...

For the problem specified in the table, build upon the results of the original problem to determine the minimum factor of safety for fatigue at point A, based on infinite life. If the life is not...

Collars A and B are pin-connected to bar ABD and can slide along fixed rods. Knowing that at the instant shown the velocity of A is 0.9 m/s to the right, determine (a) The angular velocity of ABD,...

A solvent-recovery plant consists of a plate-column absorber and a plate-column stripper. Ninety percent of the benzene (B) in the gas stream is recovered in the absorption column. Concentration of...

The question has been raised whether an open-loop unstable process can be stabilized with a proportional-only controller. (a) For the process and controller shown in figure a, find the range of Kc...

The cast-iron bell-crank lever depicted in the figure is acted upon by forces F1 of 250 lbf and F2 of 333 lbf. The section A-A at the central pivot has a curved inner surface with a radius of ri = 1...

Determine the magnitude of the moment of the force F about the base line CA of the tripod. Given: F = (50 -20 -80) N a = 4 m b = 2.5 m c = 1 m d = 0.5 m e = 2 m f = 1.5 m g = 2 m

A device has been designed to measure the flow rate of carbon dioxide evolved from a fermentation reactor. The reactor is sealed except for a tube that allows the generated carbon dioxide to bubble...

A multi fluid container is connected to a U-tube, as shown in Fig. P178, for the given specific gravities and fluid column heights, determine the gage pressure at A. Also determine the height of a...

A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35C by rejecting waste heat to cooling water that enters the condenser at 18C at a rate...

Convert the temperatures in parts (a) and (b) and temperature intervals in parts (c) and (d): (a) T = 85F to R, C, K (b) T = 10C to K, F, R (c) T = 85C to K, F, R (d) T = 150R to F, C, K

The concrete shape is formed by rotating the shaded area about the y axis. Determine the moment of inertia Iy. The specific weight of concrete is . Given: = 150lb/ft3 a = 6 in b = 4 in c = 8 in

A 50-mm-diameter, thin-walled metal pipe covered with a 25-mm-thick layer of insulation (0.085 W/m K) and carrying superheated steam at atmospheric pressure is suspended from the ceiling of a large...

For the cascaded system of Fig. 5.174 with two identical stages, determine: a. The loaded voltage gain of each stage. b. The total gain of the system, Av and Avs. c. The loaded current gain of each...

Engine oil is heated by flowing through a circular tube of diameter D = 50 mm and length L = 25 m and whose surface is maintained at 150C. (a) If the flow rate and inlet temperature of the oil are...

A small 250-g collar C can slide on a semicircular rod which is made to rotate about the vertical AB at a constant rate of 7.5 rad/s. Determine the three values of for which the collar will not...

Make two schematic plots of the logarithm of relaxation modulus versus temperature for an amorphous polymer (curve C in Figure). (a) On one of these plots demonstrate how the behavior changes with...

For the machine element shown, locate the y coordinate of the center of gravity. 10 m 19 mm 30 inm 30 iam

Certain wood stove designs rely exclusively on heat transfer by radiation and natural convection to the surroundings. Consider a stove that forms a cubical enclosure, Ls = 1 m on a side, in a large...

Superheated steam at T1 (C) and 10.0 bar is combined with saturated steam at T2 (C) and 7.0 bar in a ratio (1.96 kg of steam at 10 bar) / (1.0 kg of steam at 7 bar). The product stream is at 250C and...

A mixture of 40 mol% carbon disulfide (CS2) in carbon tetrachloride (CC4) is continuously distilled. The feed is 50% vaporized (q = 0.5). The top product from a total condenser is 95 mol% CS2, and...

A solution contains 0.100 M Ce3+, 1.00 10 -4 M Ce4+, 1.00 10 -4 M Mn2+, 0.100 M , and 1.00 M HClO4. (a) Write a balanced net reaction that can occur between species in this solution. (b) Calculate...

A slender rod of length L and weight W is attached to collars which can slide freely along the guides shown. Knowing that the rod is in equilibrium, derive an expression for the angle θ in...

Determine the force in each member of the truss and state if the members are in tension or compression. Assume each joint as a pin. Set P = 4kN. 2P V 4 m 4 m 4 m

The shaft S exerts three force components on the die D. Find the magnitude and direction of the resultant force. Force F2 acts within the octant shown. Given: F1 = 400 N F2 = 300 N F3 = 200 N...

The A-frame is being hoisted into an upright position by the vertical force F. Determine the moment of this force about the y axis when the frame is in the position shown. Given: F = 80 lb a = 6 ft b...

The bent rod is supported at A, B, and C by smooth journal bearings. Determine the magnitude of F2 which will cause the reaction Cy at the bearing C to be equal to zero. The bearings are in proper...

A paint mixture containing 25.0% of a pigment and the balance water sells for $18.00/kg, and a mixture containing 12.0% pigment sells for $10.00/kg, if a paint retailer produces a blend containing...

The press shown is used to emboss a small seal at E. Knowing that P = 250 N, determine (a) The vertical component of the force exerted on the seal, (b) The reaction at A. 400 mm 15 200 mm 20 G0

Scale-up of an agitated tank, experiments with a small-scale agitated tank are to be used to design a geometrically similar installation with linear dimensions 10 times as large. The fluid in the...

A liquid mixture containing 40.0 mole% methanol and 60.0 mole% 1-propanol is placed in an open vessel and heated slowly. Estimate the temperature at which the mixture begins to boil. List assumptions...

A horizontal, opaque surface at a steady-state temperature of 77C is exposed to an airflow having a free stream temperature of 27C with a convection heat transfer coefficient of 28 W/m2 K. The...

Calculate the heat required to raise 50 kg of solid sodium carbonate (Na2CO3) from 10C to 50C at 1atm using (a) The true heat capacity of Na2CO3, which is 1.14 kJ / (kg C). (b) A heat capacity...

A collar that can slide on a vertical rod is subjected to the three forces shown. Determine (a) The value of the angle α for which the resultant of the three forces is horizontal, (b)...

Methane at 25C is burned in a boiler furnace with 10.0% excess air preheated to 100C, Ninety percent of the methane led is consumed, the product gas contains 10.0mol CO2/mol CO and the combustion...

A block diagram for internal model control, a control technique that is considered in Chapter, is shown in Figure. Transfer function Gp denotes the process model, while Gp, denotes the actual process...

A 40.0-ft3 oxygen tent initially contains air at 68F and 14.7psia. At a time t = 0 an enriched air mixture containing 35.0% v/v O2 and the balance N2 is fed to the tent at 68F and 1.3 psig at a rate...

Calculate Z and V for ethylene at 25(C and 12 bar by the following equations: (a) The truncated virial equation [Eq. (3.401] with the following experimental values of virial coefficients: (b) The...