The figure illustrates the connection of a cylinder head to a pressure vessel using 10 bolts and a confined-gasket seal. The effective sealing diameter is 150 mm. Other dimensions are: A = 100, B =...
A household refrigerator runs one-fourth of the time and removes heat from the food compartment at an average rate of 800 kJ/h. If the COP of the refrigerator is 2.2, determine the power the...
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...
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...
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...
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...
The mass of 700 kg is suspended from a trolley which moves along the crane rail from d = 1.7 m to d = 3.5 m. Determine the force along the pin-connected knee strut BC (short link) and the magnitude...
Determine the components of all forces acting on member ABCD of the assembly shown. 120 Ib E 4 in. 2 in. OC -4 in -l- 4 in.--l 2 in. 2 in.
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...
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...
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...
Equivalence of various forms of Fick's law for binary mixtures (a) Starting with Eq. (A) of Table 17.8-2, derive Eqs. (B), (D), and (F). (b) Starting with Eq. (A) of Table 17.8-2, derive the folowing...
A 750-g collar can slide along the horizontal rod shown. It is attached to an elastic cord with an undeformed length of 300 mm and a spring constant of 150 N/m. Knowing that the collar is released...
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 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 ....
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...
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...
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 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...
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...
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?
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)...
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 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...
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...
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 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...
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) Consider the AF3 molecules in Exercise 9.29.Which of these will have a nonzero dipole moment? Explain. (b) Which of the AF4 molecules in Exercise 9.30 will have a zero dipole moment? In Exercise...
A light-hydrocarbon feed stream contains 45.4 kmol/h of propane, 136.1 kmol/h of isobutane, 226.8 kmol/h of n-butane, 181.4 kmol/h of isopentane, and 317.4 kmol/h of n-pentane. This stream is to be...
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...
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...
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,...
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 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...
The compound beam is fixed at A and supported by rockers at B and C. There are hinges (pins) at D and E. Determine the components of reaction at thesupports 15 kN 30 kN - m 6 m 2 m 2 m'2 m
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...
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...
The 3-lb uniform rod BD is connected to crank AB and to a collar of negligible weight. A couple (not shown) is applied to crank AB causing it to rotate with an angular velocity of 12 rad/s...
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...
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 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...
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...
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...
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
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
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
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)...
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...
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 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...
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)...
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...
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
For the machine element shown, locate the y coordinate of the center of gravity. 10 m 19 mm 30 inm 30 iam
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...
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 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 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...
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...
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...
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 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...
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...
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 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 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...
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
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...
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
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...
A solution was prepared by mixing 10.00 mL of unknown (X) with 5.00 mL of standard (S) containing 8.24 g S/mL and diluting the mixture to 50.0 mL. The measured signal quotient was (signal due to...
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...
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...
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-
Oxygen at 150 K and 41.64 atm has a tabulated specific volume of 4.684cm3/g and a specific internal energy of 1706J/mol. Compute the specific enthalpy of O2 in this state.
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...
Poke a hole in a piece of cardboard and hold the cardboard horizontally in the sunlight (as in Figure 1.6). Note the image of the Sun that is cast below. To convince yourself that the round spot of...
Three fixed-bed adsorbers containing 10,000 lb of granules of activated carbon (b = 30 lb/ft3) each are to be used to treat 250gpm of water containing 4.6 mg/L of 1, 2-dichloroethane (D) to reduce...
A 1-in-diameter uniform steel shaft is 24 in long between bearings. (a) Find the lowest critical speed of the shaft. (b) If the goal is to double the critical speed, find the new diameter. (c) A...
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...
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...
The costs to manufacture a part using methods A and B are estimated by CA= 10 + 0.8 P and CB = 60 + 0.8 P 0.005 P2 respectively, where the cost C is in dollars and P is the number of parts. Estimate...
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...
At 9:30 one morning, a graduate student measures 350 grams of liquid benzene at 20C into a glass flask dirty enough that its contents cannot be seen, puts the open flask on a Bunsen burner, turns the...
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...
If each box weighs 150 lb, determine the least horizontal force P that the man must exert on the top box in order to cause motion. The coefficient of static friction between the boxes is ? s = 0.65,...
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
Assume a page reference string for a process with m frames (initially all empty). The page reference string has length p with n distinct page numbers occurring in it. For any page-replacement...
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...
Contrast the scheduling policies you might use when trying to optimize a time-sharing system with those you would use to optimize a multiprogrammed batch system.
A solid sample of Zn(OH)2 is added to 0.350 L of 0.500 M aqueous HBr. The solution that remains is still acidic. It is then titrated with 0.500 M NaOH solution, and it takes 88.5 mL of the NaOH...
A 0.20-m-diameter, thin-walled steel pipe is used to transport saturated steam at a pressure of 20 bars in a room for which the air temperature is 25C and the convection heat transfer coefficient at...
Sulfuric acid is the chemical produced in the United States with the highest volume of production. In one of the earliest processes used to make it, an ore containing iron pyrites (FeS 2 ) is roasted...
A 0.1 mole% caustic soda (NaOH) solution is to be concentrated in a continuous evaporator. The solution enters the unit at 25C at a rate of 150mol/min and is concentrated to 5 mole% at 50C. Hot dry...
The rod supports a weight W and is pinned at its end A. If it is also subjected to a couple moment of M, determine the angle for equilibrium. The spring has an unstretched length and a stiffness k....
A long wire of diameter D = 1 mm is submerged in an oil bath of temperature T = 25C. The wire has an electrical resistance per unit length of R = 0.01/m. If a current of I = 100 A flows through the...
A magnesium-lead alloy of mass 5.5 kg consists of a solid phase that has a composition that is just slightly below the solubility limit at 200oC (390oF). (a) What mass of lead is in the alloy? (b)...