Packages in an automobile parts supply house are transported to the loading dock by pushing them along a roller track with very little friction. At the instant shown packages B and C are at rest and...

The measured lift slope for the NACA 23012 airfoil is 0.1080 degree1, and L = 0 = 1.3. Consider a finite wing using this airfoil, with AR = 8 and taper ratio = 0.8. Assume that 8 = r. Calculate the...

The condenser of a steam power plant contains N = 1000 brass tubes (k t = 110 W/m K), each of inner and outer diameters, D i = 25 mm and D o = 28 mm. respectively. Steam condensation on the outer...

For the interval 103 N 106 cycles, develop an expression for the axial fatigue strength (Sf ) ax for the polished specimens of 4130 used to obtain Fig. 610. The ultimate strength is Sut = 125 kpsi...

Acetone is to be extracted with n-hexane from a 40.0 wt% acetone60.0 wt% water mixtures at 25C The acetone distribution coefficient (mass fraction acetone in the hexane-rich phase/mass fraction...

The rod assembly is used to support the 250-lb cylinder. Determine the components of reaction at the ball-and socket joint A, the smooth journal bearing E, and the force developed along rod CD. The...

For the steel countershaft specified in the table, assume the bearings have a maximum slope specification of 0.06° for good bearing life. Determine the minimum shaft diameter. Problem 3-73, A...

Your task in this problem will be to use a spreadsheet to generate a Txy diagram for a two-component system, using Raoult?s law to express the vapor?liquid equilibrium distribution of each species....

A flowerpot of mass M is supported at A by the three cords. Determine the force acting in each cord for equilibrium. Given: M = 25 kg g = 9.81m/s2 θ1 = 30 deg θ2 = 30 deg θ3 = 60...

As shown in Fig. P2.45, an oven wall consists of a 0.25-in-thick layer of steel (ks = 8.7Btu/h ft oR) and a layer of thick (kb = 0.42Btu/h ft oR). At steady state, a temperature decrease of 1.2oF...

In a tempering process, glass plate, which is initially at a uniform temperature T i , is cooled by suddenly reducing the temperature of both surfaces to T s . The plate is 20 mm thick, and the glass...

The car rests on four scales and in this position the scale readings of both the front and rear tires are shown by FA and FB. When the rear wheels are elevated to a height of 3 ft above the front...

The pressure gage on a 2.5-m3 oxygen tank reads 500 kPa. Determine the amount of oxygen in the tank if the temperature is 28°C and the atmospheric pressure is 97 kPa. = 500 kPa V- 2.5 m

An industrial process involves the evaporation of water from a liquid film that forms on a contoured surface. Dry air is passed over the surface and from laboratory measurements the convection heat...

The chief engineer at a university that is constructing a large number of new student dormitories decides to install a counter flow concentric tube heat exchanger on each of the dormitory shower...

Water enters an ice machine at 55F and leaves as ice at 25F. If the COP of the ice machine is 2.4 during this operation, determine the required power input for an ice production rate of 28 lbm/h....

A container of weight W is suspended from ring A, to which cables AC and AE are attached. A force P is applied to the end F of a third cable which passes over a pulley at B and through ring A and...

The force P is applied to a small wheel that rolls on the cable ACB. Knowing that the tension in both parts of the cable is 140 lb, determine the magnitude and direction of P. 30 at 45

Radioactive wastes are packed in a thin-walled spherical container. The wastes generate thermal energy non-uniformly according to the relation q = qo[1 (r/r0)2], where q is the local rate of energy...

Coal containing 5.0 wt% S is burned at a rate of 1250lb m /mm in a boiler furnace. All of the sulfur in the coal is oxidized to SO 2 . The product gas is sent to a scrubber in which most of the SO 2...

Water is added at varying rates to a 300-liter holding tank. When a valve in a discharge line is opened, water flows out at a rate proportional to the height and hence to the volume V of water in the...

Draw the shear and moment diagrams for the overhangbeam. 4 kN/m B 3m 3m-

Knowing that P = 0, replace the two remaining couples with a single equivalent couple, specifying its magnitude and the direction of its axis. 22 n 16 in 363 h

Automobiles A and B are traveling in adjacent highway lanes and at t = 0 have the positions and speeds shown. Knowing that automobile A has a constant acceleration of 0.6 m/s2 and that B has a...

The flexural strength and associated volume fraction porosity for two specimens of the same ceramic material are as follows: (a) Compute the flexural strength for a completely nonporous specimen of...

A gear-reduction unit uses the countershaft depicted in the figure. Find the two bearing reactions. The bearings are to be angular-contact ball bearings, having a desired life of 40 kh when used at...

By driving a truck over a scale, it was determined that the loads on the front and rear axles are 18 kN and 12 kN, respectively, when the truck is empty. Determine the weight and the location of the...

A rectangular block floats in pure water with 0.5 in, above the surface and 1.5 in below the surface. When placed in an aqueous solution, the block of material floats with 1 in. below the surface....

Streams of methane and air (79 mole % N 2 , the balance O 2 ) are combined at the inlet of a combustion furnace pre-heater. The pressures of each stream are measured with open-end mercury manometers,...

Suppose that we have a multiprogrammed computer in which each job has identical characteristics. In one computation period, T, for a job, half the time is spent in I/O and the other half in processor...

The minimum fresh air requirement of a residential building is specified to be 0.35 air change per hour (ASHRAE, Standard 62, 1989). That is, 35 percent of the entire air contained in a residence...

The turbines in steam power plants operate essentially under adiabatic conditions. A plant engineer suggests to end this practice. She proposes to run cooling water through the outer surface of the...

A 64-mm-diameter circular follower B is held against cam A as shown. Knowing that the cam exerts on the follower a force of magnitude 80 N directed along the common normal BC, determine the moment of...

In a multiprogramming and time-sharing environment, several users share the system simultaneously. This situation can result in various security problems. a. What are two such problems? b. Can we...

The gears are subjected to the couple moments shown. Determine the magnitude and coordinate direction angles of the resultant couple moment. Given: M1 = 40 lb⋅ ft M2 = 30 lb⋅ ft θ1 =...

Collars B and D are pin-connected to bar ABD and can slide along fixed rods. At the instant shown the angular velocity of bar ABD is zero and the acceleration of point D is 7.2 m/s2 to the right....

(a) Estimate the activation energy for creep (i.e., Qc in Equation 8.20) for the S-590 alloy having the steady-state creep behavior shown in figure. Use data taken at a stress level of 300MPa...

A split-ring clamp-type shaft collar is shown in the figure. The collar is 2 in OD by 1 in ID by ½ in wide. The screw is designated as ¼ -28 UNF. The relation between the screw...

An uncrowned straight-bevel pinion has 20 teeth, a diametral pitch of 6 teeth/in, and a transmission accuracy number of 6. Both the pinion and gear are made of through-hardened steel with a Brinell...

Considering the stress concentration at point A in the figure, determine the maximum normal and shear stresses at A if F = 200 lbf. .y 2 in 0 12 in I-in dia. g-in R. 2 in 1-in dia. 15 in 1-in dia.

Determine the moment of inertia of the thin plate about an axis perpendicular to the page and passing through the pin at O. The plate has a hole in its center. Its thickness is c, and the material...

A convergent-divergent nozzle with an exit-to-throat area ratio of 1.616 has exit and reservoir pressures equal to 0.947 and 1.0atm, respectively. Assuming isentropic flow through the nozzle,...

The reactive force developed by a jet engine to push an airplane forward is called thrust, and the thrust developed by the engine of a Boeing 777 is about 85,000 lbf. Express this thrust in N and kgf.

Pin C is attached to rod BC and slides freely in the slot of rod OA which rotates at the constant rate Ï . At the instant when β = 60°, determine (a) r and θ (b) r...

A 180-lb man and a 120-lb woman stand side by side at the same end of a 300-lb boat, ready to dive, each with a 16-ft/s velocity relative to the boat. Determine the velocity of the boat after they...

The tensile strength of brittle materials may be determined using a variation of Equation 8.1. Compute the critical crack tip radius for an Al2O3 specimen that experiences tensile fracture at an...

Two sites are being considered for wind power generation. In the first site, the wind blows steadily at 7 m/s for 3000 hours per year, whereas in the second site the wind blows at 10 m/s for 2000...

A pistoncylinder device initially contains 0.15-kg steam at 3.5 MPa, superheated by 5°C. Now the steam loses heat to the surroundings and the piston moves down, hitting a set of stops at which...

A rigid tank contains 20 lbm of air at 50 psia and 80F. The air is now heated until its pressure doubles. Determine (a) The volume of the tank and (b) The amount of heat transfer.

Determine the relative amounts (in terms of volume fractions) of the phases for the alloys and temperatures given in Problem 9.8a, b, and c. Below are given the approximate densities of the various...

Determine the equivalent resultant force of the distributed loading and its location, measured from point A. Evaluate the integrals using Simpson's rule. Units Used: kN = 103 N Given: c1 = 5 c2 = 16...

Consider a concentric tube heat exchanger with an area of 50 m 2 operating under the following conditions: (a) Determine the outlet temperature of the hot fluid (b) Is the heat exchanger operating in...

In using the bolt cutter shown, a worker applies two 75-lb forces to the handles. Determine the magnitude of the forces exerted by the cutter on the bolt. 75 05 in. I in. I in. 20 im 4 in. 75 Ib I in.

Refrigerant -134a is being transported at 0.1 kg/s through a Teflon tube of inside diameter D; = 25 mm and outside diameter Do = 28 mm, while atmospheric air at V = 25 m/s and 300 K is in cross flow...

A steel rotating-beam test specimen has an ultimate strength of 150 kpsi and a yield strength of 135 kpsi. It is desired to test low-cycle fatigue at approximately 500 cycles. Check if this is...

The unit cell for tin has tetragonal symmetry, with a and b lattice parameters of 0.583 and 0.318 nm, respectively. If its density, atomic weight, and atomic radius are 7.30 g/cm 3 , 118.69 g/mol,...

Using superposition, find the deflection of the steel shaft at A in the figure. Find the deflection at midspan. By what percentage do these two values differ?

You are designing an operating room heat exchange device to cool blood (bypassed from a patient) from 40 to 30C by passing the fluid through a coiled tube sitting in a vat of water-ice mixture. The...

A motorist starts from rest at point A on a circular entrance ramp when t = 0, increases the speed of her automobile at a constant rate and enters the highway at point B. Knowing that her speed...

A biological fluid moves at a flow rate of m = 0.02 kg/s through a coiled, thin-walled, 5-mm-diameter tube submerged in a large water bath maintained at 50C. The fluid enters the tube at 25C. (a)...

Cite the phases that are present and the phase compositions for the following alloys: (a) 90 wt% Zn-10 wt% Cu at 400(C (750(F) (b) 75 wt% Sn-25 wt% Pb at 175(C (345(F) (c) 55 wt% Ag-45 wt% Cu at...

When holding the stone of weight W in equilibrium, the humerus H, assumed to be smooth, exerts normal forces FC and FA on the radius C and ulna A as shown. Determine these forces and the force FB...

At 25 o C, an aqueous solution containing 35.0 wt% H 2 SO 4 has a specific gravity of 1.2563. A quantity of the 35% solution is needed that contains 195.5 kg of H 2 SO 4 . (a) Calculate the required...

Solve Problem 4.96 assuming that for gear A the tangential and radial forces are acting at E, so that FA = (1325 N)j + (482 N)k. P4.96 Gears A and B are attached to a shaft supported by bearings at C...

A model rocket is launched from point A with an initial velocity v0 of 86 m/s. If the rocket??s descent parachute does not deploy and the rocket lands 104 m from A, determine(a) The angle ? that v0...

Flow of a fluid in a network of tubes (Fig. 2B.12), a fluid is flowing in laminar flow from A to B through a network of tubes, as depicted in the figure. Obtain an expression for the mass flow rate w...

A circular reentrant orifice (also called Borda??s mouthpiece) of diameter D is placed at a depth h below the surface of a tank. Knowing that the speed of the issuing stream is v = ??2gh and assuming...

Liquid water is fed to a boiler at 24C and 10bar and is converted at constant pressure to saturated steam. Use the steam tables to calculate H (kJ/kg) for this process, and then calculate the heat...

A gas leak has led to the presence of 1.00 mole% carbon monoxide in a 350-m3 laboratory.4 The leak was discovered and sealed, and the laboratory is to be purged with clean air to a point at which the...

(a) Assume for the solidification of iron (Problem 10.4) that nucleation is homogeneous, and the number of stable nuclei is 106 nuclei per cubic meter. Calculate the critical radius and the number of...

Calculate the rate of cooling (kW) required to bring 300 kg/mm of carbon monoxide from 450C to 50C, performing the calculation (a) Using Table B.2 and (b) Using Table B.8. Considering how much...

A stream containing 7,000 kmol/h of water and 3,000 parts per million (ppm) by weight of ammonia at 350 K and 1 bar is to be processed to remove 90% of the ammonia. What type of separation operation...

The shock waves on a vehicle in supersonic flight cause a component of drag called supersonic wave drag, Dw. Define the wave-drag coefficient as CDw = Dw/q S, where S is a suitable reference area for...

Although KOH, RbOH, and CsOH have little association between metal and hydroxide in aqueous solution, Li+ and Na+ doform complexes with OH-: Na + + OH- NaoH (aq) K1 = 0.20 Prepare a table like the...

A pin in a knuckle joint carrying a tensile load F deflects somewhat on account of this loading, making the distribution of reaction and load as shown in part b of the figure. The usual designers...

A 9.780-g gaseous mixture contains ethane (C 2 H 6 ) and propane (C 3 H 8 ). Complete combustion to form carbon dioxide and water requires 1.120 moles of oxygen gas. Calculate the mass percent of...

Three loads are applied as shown to a light beam supported by cables attached at B and D. Knowing that the maximum allowable tension in each cable is 12 kN and neglecting the weight of the beam,...

The vertical force F acts downward at A on the two membered frame. Determine the magnitudes of the two components of F directed along the axes of AB and AC. Set F = 500N. 30/

The figure shows a welded steel bracket loaded by a static force F. Estimate the factor of safety if the allowable shear stress in the weld throat is 120 MPa. br> 120F 7.5 kN 120 459 Dimensions in...

An insulated tank is divided into two parts by a partition. One part of the tank contains 2.5 kg of compressed liquid water at 60°C and 600 kPa while the other part is evacuated. The partition is...

A mixture of propane and butane is burned with air. Partial analysis of the stack gas produces the following dry-basis volume percentages: 0.0527% C 3 H 8 , 0.0527% C 4 H 10 , 1.48% CO. and 7.12% CO...

A solid carbohydrate (C a H b O c ) with a specific gravity of 1.59 is placed in a 1.000-liter combustion chamber. The chamber is evacuated and then charged with pure oxygen. Complete combustion of...

Consider the system shown in Fig. P177, if a change of 0.7 kPa in the pressure of air causes the brinemercury interface in the right column to drop by 5 mm in the brine level in the right column...

A stream of oxygen enters a compressor at 298 K and 1.00 atm at a rate of 127m3/h and is compressed to 358 K and 1000 atm. Estimate the volumetric flow rate of compressed O2 using the...

A reverse-osmosis plant is used to treat 30,000,000 gal/day of seawater at 20C containing 3.5 wt% dissolved solids to produce 10,000,000 gal/day of potable water with 500 ppm of dissolved solids, and...

Balloons are often filled with helium gas because it weighs only about one-seventh of what air weighs under identical conditions. The buoyancy force, which can be expressed as Fb = paiv gV balloon,...

A circular ice rink 25 m in diameter is enclosed by a hemispherical dome 35 m in diameter. If the ice and dome surfaces may be approximated as blackbodies and are at 0 and 15 C, respectively, what is...

Determine the largest weight of the oil drum that the floor crane can support without overturning. Also, what are the vertical reactions at the smooth wheels A, B, and C for this case. The floor...

A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -30°C by rejecting its waste heat to cooling water that enters the condenser at...

An insulated pistoncylinder device contains 5 L of saturated liquid water at a constant pressure of 150 kPa. An electric resistance heater inside the cylinder is now turned on, and 2200 kJ of energy...

A 1.5-m3 insulated rigid tank contains 2.7 kg of carbon dioxide at 100 kPa. Now paddle-wheel work is done on the system until the pressure in the tank rises to 150 kPa. Determine the entropy change...

Boxes A and B are at rest on a conveyor belt that is initially at rest. The belt is suddenly started in an upward direction so that slipping occurs between the belt and the boxes. Knowing that the...

A diffuse, gray radiation shield of 60-mm diameter and emissivities of ? 2, i = 0.01 and ? 2, o = 0.1 on the inner and outer surfaces, respectively, is concentric with a long tube transporting a hot...

A mass of 5 kg of saturated liquidvapor mixture of water is contained in a pistoncylinder device at 125 kPa. Initially, 2 kg of the water is in the liquid phase and the rest is in the vapor phase....

In a material processing experiment conducted aboard the space shuttle, a coated niobium sphere of l0-mm diameter is removed from a furnace at 900C and cooled to a temperature of 300C. Although...

A heavy crate is being moved a short distance using three identical cylinders as rollers. Knowing that at the instant shown the crate has a velocity of 200 mm/s and an acceleration of 400mm/s2, both...

A uniform slender rod AB rests on a frictionless horizontal surface, and a force P of magnitude 2 N is applied at A in a direction perpendicular to the rod. Knowing that the rod has a mass of 3 kg,...

Ethane gas (C2H6) at 25°C is burned in a steady-flow combustion chamber at a rate of 5 kg/h with the stoichiometric amount of air, which is preheated to 500 K before entering the combustion...

Copper tubing is joined to the absorber of a flat-plate solar collector as shown. The aluminum alloy (2024- T6) absorber plate is 6 mm thick and well insulated on its bottom. The top surface of the...

Motion of a sphere in a liquid, a hollow sphere, 5.00 mm in diameter, with a mass of 0.0500 g, is released in a column of liquid and attains a terminal velocity of 0.500 cm/s. The liquid density is...