Calculate pCo2+ at each of the following points in the titration of 25.00 mL of 0.020 26 M Co2+ by 0.03855 M EDTA at pH 6.00: (a) 12.00 mL; (b) Ve; (c) 14.00 mL.

The uniform 10-lb rod AB is supported by a ball-and-socket joint at A and leans against both the rod CD and the vertical wall. Neglecting the effects of friction, determine (a) The force which rod CD...

Heated air required for a food-drying process is generated by passing ambient air at 20C through long, circular tubes (D = 50 mm, L = 5 m) housed in a steam condenser. Saturated steam at atmospheric...

Diffusion through a stagnant film--alternate derivation in S18.2 an expression for the evaporation rate was obtained in Eq. 18.2-14 by differentiating the concentration profile found a few lines...

Consider a circular furnace that is 0.3 m long and 0.3 m in diameter. The two ends have diffuse, gray surfaces that are maintained at 400 and 500 K with emissivities of 0.4 and 0.5, respectively. The...

Considering just acid-base chemistry, not ion pairing and not activity coefficients, find the pH and concentrations of species in 1.00 L of solution containing 0.020 mol arginine, 0.030 mol glutamic...

A pistoncylinder device contains a mixture of 0.5 kg of H2 and 1.6 kg of N2 at 100 kPa and 300 K. Heat is now transferred to the mixture at constant pressure until the volume is doubled. Assuming...

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 BD is 55 lb,...

The system shown in Figure is used to cool the reactor effluent and separate the light gases from the heavier hydrocarbons. K-values for the components at 500 psia and 100?F are (a) Calculate the...

A specialty chemicals facility manufactures two products A and B in barrels. Products A and B utilize thy same raw material; A uses 120 kg/bbl, while B requires 100 kg/bbl. There is an upper limit on...

When a mixture of 10.0 g of acetylene (C2H2); and 10.0 g of oxygen (O2) is ignited, the resultant combustion reaction produces CO2 and H2O. (a) Write the balanced chemical equation for this reaction....

Determine Zi Zo and Av for the network of Fig. 8.84. +20 V aSS 12 mA 3 91 = 45 k Z 10 MS2

Determine the single equivalent force and the distance from end A to its line of action for the beam and loading shown when (a) 200 B N, F= ↓ MB=100 N m, (b) B 100 N, F= ↑ MB = −600 N...

An elevator starts from rest and moves upward, accelerating at a rate of 4 ft/s2 until it reaches a speed of 24 ft/s, which it then maintains. Two seconds after the elevator begins to move, a man...

Two small surfaces, A and B, are placed inside an isothermal enclosure at a uniform temperature. The enclosure provides an irradiation of 6300 W/m2 to each of the surfaces, and surfaces A and B...

Consider a household that uses 11,000 kWh of electricity per year and 1500 gallons of fuel oil during a heating season. The average amount of CO2 produced is 26.4 lbm/gallon of fuel oil and 1.54...

Determine by direct integration the centroid of the area shown. R R

Gases are often used instead of liquids to cool electronics in avionics applications because of weight considerations. The cooling systems are often closed so that coolants other than air may be...

Consider the concentrating photovoltaic apparatus of Problem 7.19. The apparatus is to be installed in a desert environment, so the space between the concentrating lens and top of the photovoltaic...

A channel and an angle are welded to an a 20-mm steel plate. Knowing that the centroidal y axis is located as shown, determine (a) The width a, (b) The moments of inertia with respect to the...

A 50-kg copper block initially at 80°C is dropped into an insulated tank that contains 120 L of water at 25°C. Determine the final equilibrium temperature and the total entropy change for...

Draw the free-body diagram of the smooth rod of mass M which rests inside the glass. Explain the significance of each force on the diagram. Given: M = 20 gm a = 75 mm b = 200 mm θ = 40 deg B.

A sealed rigid vessel of 2 m3 contains a saturated mixture of liquid and vapor R- 134a at 10C. If it is heated to 50C, the liquid phase disappears. Find the pressure at 50C...

The ABC Evening News Report in a news segment on hypothermia research studies at the University of Minnesota claimed that heat loss from the body is 30 times faster in 10C water than in air at the...

Ground source heat pumps operate by using a liquid rather than ambient air, as the heat source (or sink) for winter heating (or summer cooling). The liquid flows in a closed loop through plastic...

An NH3 H2O mixture containing 60 wt% NH3 is brought to equilibrium in a closed container at 140F. The total mass of the mixture is 250 g. Use Figure 8.5-2 to determine the masses of ammonia and of...

A pneumatic control valve is used to adjust the flow rate of a petroleum fraction (sp gr = 0.9) that is used as fuel in a cracking furnace. A centrifugal pump is used to supply the fuel, and an...

For the balanced chemical equation 3Cu(s) + 2NO3(aq) + 8H+(aq) ( 3Cu2+(aq) + 4H2O() + 2NO(g) How many moles of Cu2+ are formed when 55.7 mol of H+ are reacted?

R-134a at 30oC, 800 kPa is throttled so it becomes cold at 10oC. What is exit P?

Knowing that P = 5 lb, replace the three couples with a single equivalent couple, specifying its magnitude and the direction of its axis. Kiu.

A 4-kg projectile is fired vertically with an initial velocity of 90 m/s, reaches a maximum height and falls to the ground. The aerodynamic drag D has a magnitude D = 0.0024 v2 where D and v are...

The 300-mm uniform rod BD of mass 3 kg is connected as shown to crank AB and to collar D of negligible mass, which can slide freely along a horizontal rod. Knowing that crank AB rotates...

Determine the largest mass of cylinder A that can be supported from the drum if a force P is applied to the handle of the lever. The coefficient of static friction between the belt and the wheel is...

The cover plate of a flat-plate solar collector is at 15C, while ambient air at 10C is in parallel flow over the plate, with U = 2 m/s. (a) What is the rate of convective heat loss from the plate?...

Heat loss from a rectangular fin calculates the heat loss from a rectangular fin (see Fig. 10.7-1) for the following conditions: Air temperature 350F Wall temperature 500F Thermal conductivity of fin...

The pin-connected mechanism is constrained by a pin at A and a roller at B. Determine the force P that must be applied to the roller to hold the mechanism in equilibrium when ? = 30 o . The spring is...

An electronic device is cooled by passing air at 27?C through six small tubular passages in parallel drilled through the bottom of the device as shown below. The mass flow rate per tube is 7 x 10??5...

An angular-contact, inner ring rotating, 02-series ball bearing is required for an application in which the life requirement is 50 000 h at 480 rev/min. The design radial load is 610 lbf. The...

You want a pot of water to boil at 105oC. How heavy a lid should you put on the 15 cm diameter pot when Patm = 101 kPa?

An insulated 150-ft3 rigid tank contains air at 75 psia and 140F. A valve connected to the tank is opened, and air is allowed to escape until the pressure inside drops to 30 psia. The air temperature...

A series RLC circuit is connected to a generator with a voltage vs (t) = Vo cos (wt + π/3) (V). (a) Write down the voltage loop equation in terms of the current i (t), R, L, C, and vs (t). (b)...

Find the missing properties a. H2O T 250C, v 0.02 m3/kg P ? u ? b. N2 T 277C, P 0.5 MPa...

Consider a large vertical plate with a uniform surface temperature of 130C suspended in quiescent air at 25C and atmospheric pressure. (a) Estimate the boundary layer thickness at a location 0.25 m...

A flat-belt idler pulley is molded from polycarbonate with a bronze bushing. Knowing that the densities of polycarbonate and bronze are 1250 kg/m3 and 8800 kg/m3, respectively, determine the x...

Two loads are suspended as shown from cable ABCD. Knowing that dC = 0.75 m, determine (a) The distance dB, (b) The components of the reaction at A, (c) The maximum tension in the cable. de 2.25 kN 3...

Copper tubes 25 mm in diameter and 0.75 m long are used to boil saturated water at 1 atm. (a) If the tubes are operated at 75% of the critical heat flux, how many tubes are needed to provide a vapor...

A double-wall heat exchanger is used to transfer heat between liquids flowing through semicircular copper tubes. Each tube has a wall thickness of t = 3 mm and an inner radius of r; = 20 mm. and good...

A separately-excited dc motor is mechanically coupled to a three-phase, four-pole, 30-kVA, 460-V, cylindrical-pole synchronous generator. The dc motor is connected to a constant 230-V dc supply, and...

For an axially loaded rod, prove that = 1 for the E/ guidelines in Fig.216. TechnicalSAl0Steels Ni alloys Si), SiC - - 1 Ti alloys l W alloys Al alloys Composites CFRP Cu alloys 100 Wood l grain...

The currents iLa (t) and iC (t) of the inductor and capacitor in the circuit shown can be drawn as phasors in a phasor diagram. Use a phasor diagram to show that iL(t) + iC (t) = iS(t). i 1 c(t) 10 mH

Saturated steam at 4 bars absolute pressure with a mean velocity of 3 m/s flows through a horizontal pipe whose inner and outer diameters are 55 and 65 mm, respectively. The heat transfer coefficient...

Air enters the evaporator section of a window air conditioner at 14.7 psia and 90F with a volume flow rate of 200 ft3/min Refrigerant-134a at 20 psia with a quality of 30 percent enters the...

A transmission line operating at 125 MHz has Z0 - 40, a 0.02 (Np/m), and B 0.75 rad/m. Find the line parameters R`, L`, G`, and C`.

Solve Prob. 4.17 assuming that the 330-N force is replaced with an 82.5-N m clockwise couple. Problem 4.17: Determine the reactions at A and B when (a) α = 0, (b) α...

Assuming the upward reaction of the ground on beam AB to be uniformly distributed and knowing that a = 0.3m, (a) Draw the shear and bending moment diagrams, (b) Determine the maximum absolute values...

A rod of 10-mm diameter and 250-mm length has one end maintained at 100C. The surface of the rod experiences free convection with the ambient air at 25C and a convection coefficient that depends on...

Heat transfer in laminar tube flow, One hundred pounds per hour of oil at 100F is flowing through a 1-in.i.d. Copper tube, 20ft long the inside surface of the tube is maintained at 215F by condensing...

Mixing of two ideal-gas streams, (a) Calculate the resulting velocity, temperature, and pressure when the following two air streams are mixed in an apparatus such as that described in Example 15.3-2....

Problems 112 and 113 raise the question of the reliability of the bearing pair on the shaft. Since the combined reliabilities R is R1 R2 , what is the reliability of the two bearings (probability...

Steel tubes with a Youngs modulus of 207 GPa have the specifications: Inner Tube 25 0.050 mm 500.010mm Outer Tube 49.98 +0.010 mm 750.10mm ID OD

A transmission line of length l connects a load to a sinusoidal voltage source with an oscillation frequency f. assuming the velocity of wave propagation on the line is c, for which of the following...

A gas mixture at 20C, 125 kPa is 50% N2, 30% H2O and 20% O2 on a mole basis. Find the mass fractions, the mixture gas constant and the volume for 5 kg of mixture.

Forced-convection heat transfer from an isolated sphere (a) A solid sphere 1 in. in diameter is placed in an otherwise undisturbed air stream, which approaches at a velocity of 100 ft/s, a pressure...

Determine the force in members DG and FH of the truss shown. -6t -- 6 ft- 6it --6t--6t -- 6 it-

Each of the gears A and B has a weight of 5 lb and a radius of gyration of 4 in., while gear C has a weight of 25 lb and a radius of gyration of 7.5 in. A couple M of magnitude 6.75 lb ??ft is...

Nitrogen gas can be injected into oil wells to increase the recovery of crude oil (enhanced oil recovery). Usually, natural gas is produced with the oil and it is desirable to recover the nitrogen...

Your boss has discussed implementing a level controller on a troublesome process tank that contains a boiling liquid. Someone told him that a level transmitter used with such a system has a very...

The liquid level in a reboiler of a steam-heated distillation column is to be controlled by adjusting the control valve on the steam line, as shown in figure. The process transfer function has been...

What is the volume of 0.662 mol of He if the density of He is 0.1785 g/L?

The following turbulent-flow velocity data u(y), for air at 75F and 1 atm near a smooth flat wall, were taken in the University of Rhode Island wind tunnel: y, in: 0.025 0.035 0.047 0.055 0.065 u,...

Beginning with the free convection correlation of the form given by Equation 9.24, show that for air at atmospheric pressure and a film temperature of 400 K. the average heat transfer coefficient for...

The machine component shown was cut from a thin, uniform plate. Denoting the mass of the component by m, determine its mass moment of inertia with respect to (a) The axis BB, (b) The centroidal axis...

The 2.5-kg slender rod AB is released from rest in the position shown and swings to a vertical position where it strikes the 1.5-kg slender rod CD. Knowing that the coefficient of restitution between...

A well-insulated 4-m = 4-m X 5-m room initially at 10°C is heated by the radiator of a steam heating system. The radiator has a volume of 15 L and is filled with superheated vapor at 200 kPa and...

An ideal Otto cycle with air as the working fluid has a compression ratio of 8. The minimum and maximum temperatures in the cycle are 540 and 2400 R. Accounting for the variation of specific heats...

Consider a mixture of two gases A and B. Show that when the mass fractions mfA and mfB are known, the mole fractions can be determined from where MA and MB are the molar masses of A and B.

Rod AD is bent in the shape of an arc of a circle of radius b = 150 mm. The position of the rod is controlled by pin B which slides in a horizontal slot and also slides along the rod. Knowing that at...

Assume a system with four resource types, C = , and the maximum claim table shown in Figure below. The resource allocator is considering allocating resources according to the table shown in Figure....

It is desired to control the exit temperature T 2 of tie heat exchanger shown in Fig. E. by adjusting the steam flow rate w s . Unmeasured disturbances occur in inlet temperature T 1 . The dynamic...

Complete this table for H2O: T, C 140 v, m3/kg 0.05 P kPa Phase description Saturated liquid 125 500 750 0.140

A handheld pump for a bicycle has a volume of 25 cm3 when fully extended. You now press the plunger (piston) in while holding your thumb over the exit hole, so that an air pressure of 300 kPa is...

A slender rod of length l is pivoted about a point C located at a distance b from its center G. It is released from rest in a horizontal position and swings freely. Determine (a) The distance b for...

A parallel RLC resonant circuit with a resonant frequency of 20,000 rad/s has an admittance at resonant of 1mS. If the capacitance of the network is 2F, find the values of R and L.

Suppose R = 3, 2, 4, 3, 4, 2, 2, 3, 4, 5, 6, 7, 7, 6, 5, 4, 5, 6, 7, 2, 1 is a page reference stream. a. Given a page frame allocation of 3 and assuming the primary memory is initially unloaded, how...

A thin disk of weight W = 10 lb rotates with an angular velocity w2 with respect to arm ABC, which itself rotates with an angular velocity w1 about the y axis. Knowing that w1 = 5 rad/s and w2 = 15...

A spur gearset has 17 teeth on the pinion and 51 teeth on the gear. The pressure angle is 20 and the overload factor Ko = 1. The diametral pitch is 6 teeth/in and the face width is 2 in. The pinion...

A passive solar house that is losing heat to the outdoors at 3C at an average rate of 50,000 kJ/h is maintained at 22C at all times during a winter night for 10 h. The house is to be heated by 50...

A grade beam AB supports three concentrated loads and rests on soil and the top of a large rock. The soil exerts an upward distributed load, and the rock exerts a concentrated load ad RR as shown....

A circular metal disk having a diameter of 0.4 m is placed firmly against the ground in a barren horizontal region where the earth is at a temperature of 280 K. The effective sky temperature is also...

A full journal bearing has a journal with a diameter of 2.000 in and a unilateral tolerance of 0.0012 in. The bushing has a bore with a diameter of 2.0024 and a unilateral tolerance of 0.002 in. The...

Consider a heat engine and heat pump connected as shown in figure P.7.38. Assume TH1 = TH2 > Tamb and determine for each of the three cases if the setup satisfy the first law and/or violates the 2nd...

The tank in Fig P2.57 is 2 m wide into the paper. Neglecting atmospheric pressure, find the resultant hydrostatic force on panel BC, (a) From a single formula; (b) By computing horizontal and...

A hydrofoil 50 cm long and 4 m wide moves at 28 kn in seawater at 20°C. Using flat-plate theory with Retr = 5E5, estimate its drag, in N, for (a) a smooth wall and (b) a rough wall, ε =...

A steady supply of 1.0 m3/s air at 25C, 100 kPa, 50% relative humidity is needed to heat a building in the winter. The outdoor ambient is at 10C, 100 kPa, 50% relative humidity. What...

Average heat transfer coefficients (Fig. 14A.1), Ten thousand pounds per hour of an oil with a heat capacity of 0.6 Btu/lb m F is being heated from 100F to 200F in the simple heat exchanger shown in...

A small disk 5 mm in diameter is positioned at the center of an isothermal hemispherical enclosure. The disk is diffuse and gray with an emissivity of 0.7 and is maintained at 900 K. The...

Assume you have the following jobs to execute with one processor, with the jobs arriving in the order listed here: a. Suppose a system uses FCFS scheduling. Create a Gantt chart illustrating the...

Gaseous hydrogen at 150 psia and 80F is stored in a small, spherical, steel pressure vessel having an inside diameter of 4 in. and a wall thickness of 0.125 in. At these conditions, the solubility of...

A process has the transfer function, G(s) 2e0.2t/ (s + 1). Compare the PI controller settings for the following design approaches: (a) Direct Synthesis method (c = 0.2) (b) Direct Synthesis method (c...

The staged system model for a three-stage absorber is presented in Eqs. (2?73)?(2?75), which are in state space form. A numerical example of the absorber model suggested by Wong and Luus 2 has the...