Engineering - Introduction Mechanical Engineering,

Two popular pain medications are being compared on the basis of the speed of absorption by the body. Specifically, tablet 1 is claimed to be absorbed twice as fast as tablet 2. Assume that 2 1 and ...

An article in Environment International (Vol. 18, No. 4, 1992) describes an experiment in which the amount of radon released in showers was investigated. Radon-enriched water was used in the...

Estimate how many times more expensive it is to grind a steel part to a tolerance of 0.0005 in versus turning it to a tolerance of 0.003 in.

A steel member has a Brinell of H B = 275. Estimate the ultimate strength of the steel in MPa.

Some commonly used plain carbon steels are AISI 1010, 1018, and 1040. Research these steels and provide a comparative summary of their characteristics, focusing on aspects that make each one unique...

Four catalysts that may affect the concentration of one component in a three-component liquid mixture are being investigated. The following concentrations are obtained: (a) Do the four catalysts have...

A chemist wishes to test the effect of four chemical agents on the strength of a particular type of cloth. Because there might be variability from one bolt to another, the chemist decides to use a...

Search the website noted in Sec. 220 (http://composite.about.com/cs/software/) and report your findings. Your instructor may wish to elaborate on the level of this report. The website contains a...

Repeat Prob. 51 for a bar of AISI 1030 hot-rolled steel and: (a) x = 25 kpsi, y = 15 kpsi (b) x = 15 kpsi, y = -15 kpsi (c) x = 20 kpsi, y = 10 kpsi (d) x = -12 kpsi , y = 15 kpsi , xy = -9...

The effect of five different ingredients (A, B, C, D, E) on the reaction time of a chemical process is being studied. Each batch of new material is only large enough to permit five runs to be made....

A 1020 CD steel shaft is to transmit 20 hp while rotating at 1750 rpm. Determine the minimum diameter for the shaft to provide a minimum factor of safety of 3 based on the maximum-shear-stress theory.

For the case study problem, design the input shaft, including complete specification of the gear, bearings, key, retaining rings, and shaft.

For the case study problem, design the output shaft, including complete specification of the gear, bearings, key, retaining rings, and shaft.

For Fig. A155, let D = 3 in, d = 2 in, r = 0.25 in, and estimate Kt. Use 1/2 symmetry and 1/8-in-thick 2-D elements. 3.0 Dld = 1.50 2.6 F F 1.10 2.2 K, 1.05 1.8 1.02 1.4 1.0 0.05 0.10 0.15 0.20 0.25...

The quality control department of a fabric finishing plant is studying the effect of several factors on the dyeing of cottonsynthetic cloth used to manufacture men's shirts. Three operators, three...

A router is used to cut locating notches on a printed circuit board. The vibration level at the surface of the board as it is cut is considered to be a major source of dimensional variation in the...

Calculate approximate 95 percent confidence limits for the factor effects in Problem 6-10. Do the results of this analysis agree with the analysis of variance performed in Problem 6-10? Problem 6-10...

An article in the AT&T Technical Journal (March/April 1986, Vol. 65, pp. 39-50) describes the application of two-level factorial designs to integrated circuit manufacturing. A basic processing step...

The hydraulic lift in a car repair shop has an output diameter of 30 cm and is to lift cars up to 2500 kg. Determine the fluid gage pressure that must be maintained in the reservoir.

Consider a 2100-kg car cruising at constant speed of 70 km/h. Now the car starts to pass another car by accelerating to 110 km/h in 5 s. Determine the additional power needed to achieve this...

Suppose you have made the eight runs in the 2 5-2 design in Problem 8-4. What additional runs would be required to identify the factor effects that are of interest? What are the alias relationships...

A 16-run experiment was performed in a semiconductor manufacturing plant to study the effects of six factors on the curvature or camber of the substrate devices produced. The six variables and their...

Calculate the total work, in kJ, for process 13 shown in Fig. P44 when the system consists of 2 kg of nitrogen. 500 400 100 0.5 1 U, m/kg P, kPa

Neon is compressed from 100 kPa and 20C to 500 kPa in an isothermal compressor. Determine the change in the specific volume and specific enthalpy of neon caused by this compression.

In an article in Quality Engineering ("An Application of Fractional Factorial Experimental Designs," 1988, Vol. 1, pp. 19-23) M. B. Kilgo describes an experiment to determine the effect of CO 2...

Consider the single replicate of the 2 4 design in Example 6-2. Suppose that we ran five points at the center (0, 0, 0, 0) and observed the following responses: 73, 75, 71, 69, and 76. Test for...

Heat treating is often used to carbonize metal parts, such as gears. The thickness of the carbonized layer is a critical output variable from this process, and it is usually measured by performing a...

An article by W. D. Baten in the 1956 volume of Industrial Quality Control described an experiment to study the effect of three factors on the lengths of steel bars. Each bar was subjected to one of...

An open feedwater heater heats the feedwater by mixing it with hot steam. Consider an electric power plant with an open feedwater heater that mixes 0.1 lbm/s of steam at 10 psia and 200F with 2.0...

A 16-run fractional factorial experiment in nine factors was conducted by Chrysler Motors Engineering and described in the article "Sheet Molded Compound Process Improvement," by P. I. Hsieh and D....

Water at 80F and 20 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. If both streams enter the mixing chamber at the same mass flow rate, determine the temperature and...

The hexagon design that follows is used in an experiment that has the objective of fitting a second-order model: (a) Fit the second-order model. (b) Perform the canonical analysis. What type of...

A pistoncylinder device containing carbon-dioxide gas undergoes an isobaric process from 15 psia and 80F to 200F. Determine the work and the heat transfer associated with this process, in Btu/lbm.

Water is boiling at 1 atm pressure in a stainless steel pan on an electric range. It is observed that 1.25 kg of liquid water evaporates in 30 min. The rate of heat transfer to the water is (a) 1.57...

One kilogram of water fills a 150-L rigid container at an initial pressure of 2 MPa. The container is then cooled to 40C. Determine the initial temperature and the final pressure of the water. H,0 1...

Go to the Internet and connect to the NSPE website (www.nspe.org/ethics). Go to Ethics Resources and review one or more of the topics given. A sample of some of the topics may be: (a) Education...

A completely reversible air conditioner provides 36,000 Btu/h of cooling for a space maintained at 70F while rejecting heat to the environmental air at 110F. Calculate the rate at which the entropies...

Repeat Prob. 218 for the commonly used alloy steels, AISI 4130 and 4340. Prob. 218 Some commonly used plain carbon steels are AISI 1010, 1018, and 1040. Research these steels and provide a...

The table lists the maximum and minimum hole and shaft dimensions for a variety of standard press and shrink fits. The materials are both hot-rolled steel. Find the maximum and minimum values of the...

An aluminum pan has a flat bottom whose diameter is 30 cm. Heat is transferred steadily to boiling water in the pan through its bottom at a rate of 1100 W. If the temperatures of the inner and outer...

Repeat Prob. 51 for a bar of AISI 1015 cold-drawn steel with the following principal stresses obtained from Eq. (313 ): (a) A = 30 kpsi , B = 30 kpsi (b) A = 30 kpsi , B = -30 kpsi (c) A = 30...

An AISI 1018 steel has a yield strength, S y = 295 MPa. Using the distortion-energy theory for the given state of plane stress, (a) Determine the factor of safety, (b) Plot the failure locus, the...

Can any ideal gas power cycle have a thermal efficiency greater than 55 percent when using thermal energy reservoirs at 627C and 17C?

An AISI 1018 steel has a yield strength, S y = 295 MPa. Using the distortion-energy theory for the given state of plane stress, (a) Determine the factor of safety, (b) Plot the failure locus, the...

An AISI 4142 steel Q&T at 800F exhibits S yt = 235 kpsi, S yc = 285 kpsi, and f = 0.07. For the given state of plane stress, (a) Determine the factor of safety, (b) Plot the failure locus and the...

A simple ideal Rankine cycle with water as the working fluid operates between the pressure limits of 4 MPa in the boiler and 20 kPa in the condenser and a turbine inlet temperature of 700C. The...

Consider a function f(x) and its derivative df/dx. Can this derivative be determined by evaluating dx/df and taking its inverse?

Atmospheric air at 1 atm, 30C, and 80 percent relative humidity is cooled to 20C while the mixture pressure remains constant. Calculate the amount of water, in kg/kg dry air, removed from the air and...

An AISI 4142 steel Q&T at 800F exhibits S yt = 235 kpsi, S yc = 285 kpsi, and f = 0.07. For the given state of plane stress, (a) Determine the factor of safety, (b) Plot the failure locus and the...

Repeat Prob. 519 by first plotting the failure loci in the A , B plane to scale; then for each stress state, plot the load line and by graphical measurement estimate the factor of safety. (a) x =...

For an ASTM 30 cast iron, (a) Find the factors of safety using the BCM and MM theories, (b) Plot the failure diagrams in the A , B plane to scale and locate the coordinates of the stress state, (c)...

A steam power plant operates on the simple ideal Rankine cycle between the pressure limits of 10 kPa and 5 MPa, with a turbine inlet temperature of 600C. The rate of heat transfer in the boiler is...

For an ASTM 30 cast iron, (a) Find the factors of safety using the BCM and MM theories, (b) Plot the failure diagrams in the A , B plane to scale and locate the coordinates of the stress state, (c)...

A cast aluminum 195-T6 exhibits S ut = 36 kpsi, S uc 5 35 kpsi, and f = 0.045. For the given state of plane stress, (a) Using the Coulomb-Mohr theory, determine the factor of safety, (b) Plot the...

Air enters a convergingdiverging nozzle with low velocity at 2.4 MPa and 120C. If the exit area of the nozzle is 3.5 times the throat area, what must the back pressure be to produce a normal shock at...

Air flows through a convergingdiverging nozzle in which the exit area is 2.896 times the throat area. Upstream of the nozzle entrance, the velocity is negligibly small and the pressure and...

A cast aluminum 195-T6 exhibits S ut = 36 kpsi, S uc 5 35 kpsi, and f = 0.045. For the given state of plane stress, (a) Using the Coulomb-Mohr theory, determine the factor of safety, (b) Plot the...

Repeat Probs. 526 using the modified-Mohr theory. A cast aluminum 195-T6 exhibits S ut = 36 kpsi, S uc 5 35 kpsi, and f = 0.045. For the given state of plane stress, (a) Using the Coulomb-Mohr...

Air is flowing in a wind tunnel at 12C and 66 kPa at a velocity of 190 m/s. The Mach number of the flow is (a) 0.56 (b) 0.65 (c) 0.73 (d) 0.87 (e) 1.7

Assuming you have a thermometer and a device to measure the speed of sound in a gas, explain how you can determine the mole fraction of helium in a mixture of helium gas and air.

A mixture of 1 mol of H 2 and 1 mol of Ar is heated at a constant pressure of 1 atm until 10 percent of H 2 dissociates into monatomic hydrogen (H). Determine the final temperature of the mixture.

For the case study problem, change the power requirement to 40 horsepower. Design the intermediate shaft, including complete specification of the gears, bearings, keys, retaining rings, and shaft. A...

Name two advantages of having a computer in the loop.

Solve the following differential equations using classical methods. Assume zero initial conditions. a. dx/dt + 7x = 5 cos 2t b. d 2 x/dt 2 + 6dx/dt + 8x = 5 sin 3t c. d 2 x/dt 2 + 8dx/dt + 25x =...

Given the combined translational and rotational system shown in Figure P2.29, find the transfer function, G(s) = X(s)/T(s). T(O) Radius = r Bh 0000 Ideal D3 gear 1:1 K2 FIGURE P2.29

Some engineers have developed a device that provides lighting to rural areas with no access to grid electricity. The device is intended for indoor use. It is driven by gravity, and it works as...

An adiabatic air compressor compresses 10 L/s of air at 120 kPa and 20C to 1000 kPa and 300C. Determine (a) The work required by the compressor, in kJ/kg, and (b) The power required to drive the air...

A pressure cooker is a pot that cooks food much faster than ordinary pots by maintaining a higher pressure and temperature during cooking. The pressure inside the pot is controlled by a pressure...

Reconsider Prob. 7199E. The filled compressed-air storage tank is discharged at a later time through the turbine until the pressure in the tank is 1 atm. During this discharge, the temperature of the...

In a production facility, 1.5-in-thick, 1-ft 3-ft square brass plates ( = 532.5 lbm/ft 3 and c p = 0.091 Btu/ lbmF) that are initially at a uniform temperature of 75F are heated by passing them...

A refrigerator uses refrigerant-134a as the working fluid and operates on the vapor-compression refrigeration cycle. The evaporator and condenser pressures are 200 kPa and 1400 kPa, respectively. The...

Reconsider Prob. 1034. How much does the thermal efficiency of the cycle change when the temperature at the entrance to the low-pressure turbine is increased to 550C? Data From Q#34: Consider a steam...

A mixture of ideal gases consists of the following gases by mole fraction: 10 percent CO 2 , 60 percent H 2 O, and 30 percent CO. Determine the Gibbs function of the CO in this mixture when the...

Use the Gibbs function to determine the equilibrium constant of the H 2 O H 2 + 1/2 O 2 reaction at (a) 1440 R (b) 3960 R. How do these compare to the equilibrium constants of Table A28? TABLE A-28...

Given the electric network shown in Figure P1.6. a. Write the differential equation for the network if v(t) = u(t), a unit step. b. Solve the differential equation for the current, i(t), if there is...

Repeat Problem 19 in Chapter 1, using Laplace transforms. Assume zero initial conditions. Data From Problem 19 in Chapter 1: Repeat Problem 18 using the network shown in Figure P1.7. Assume R=1;...

Repeat Problem 32 using MATLAB. Use one program to do the following: a. Display a root locus and pause. b. Draw a close-up of the root locus where the axes go from -2 to 0 on the real axis and -2 to...

Find the transfer function, G(s) = V o (s)/V i (s), for each network shown in Figure P2.3. 12 12 1 H 22 Vo(f) vi(t) e 2FVo() vi(t) 1H 10 (a) (b) FIGURE P2.3

Show that the system of Figure 3.7 in the text yields a fourth-order transfer function if we relate the displacement of either mass to the applied force, and a third-order one if we relate the...

Find the state-space representation in phase-variable form for each of the systems shown in Figure P3.8. R(s) 100 C(s) s4+ 20s3+ 10s2+ 7s + 100 (a) R(s) 30 C(s) 5+ 8s4 + 9s3 + 6s+ s+ 30 (b) FIGURE...

For each of the three unit step responses shown in Figure P4.10, find the transfer function of the system. 0.05 0.1 0.15 0.2 0.25 Time (seconds) (a) 25 20 15 10 2 3 5 Time (seconds) (b) 1.4 1.2 1.0...

Problem 23 in Chapter 1 discusses the cruise control of serial, parallel, and split-power hybrid electric vehicles (HEVs). The functional block diagrams developed for these HEVs indicated that the...

For each pair of second-order system specifications that follow,find the location of the second-order pair of poles. a. %OS = 12%; T s = 0:6 second b. %OS = 10%; T p = 5 seconds c. T s = 7 seconds; T...

Repeat Problem 9 using MATLAB. Data From Problem 9: Find the state-space representation in phase-variable form for each of the systems shown in Figure P3.8. R(s) 100 C(s) s4+ 20s3+ 10s2+ 7s + 100 (a)...

Figure P3.17 shows a free-body diagram of an inverted pendulum, mounted on a cart with a mass, M. The pendulum has a point mass, m, concentrated at the upper end of a rod with zero mass, a length, l,...

Solve the following state equation and output equation for y(t), where u(t) is the unit step. Use the Laplace transform method. -3 x+ u(t) -1 y = [1 0]x; x(0) =

For Problem 23 in Chapter 1 we developed the functional block diagrams for the cruise control of serial, parallel, and split-power hybrid electric vehicles (HEV). Those diagrams showed that the...

Refer to the Minerals Engineering (Vol. 46-47, 2013) study of the impact of calcium and gypsum on the flotation properties of silica in water, Exercise 2.23 and 2.34. Recall that one flotation...

Engineers who design shopping vehicles (e.g., carts) for retail stores take into account issues such as maneuverability, shopping behavior, child safety, and maintenance cost. Interestingly, while...

The displacement of a particle which moves along the s-axis is given by s = (2 + 3t)e 0.5t , where s is in meters and t is in seconds. Plot the displacement, velocity, and acceleration versus time...

Refer to the Minerals Engineering (Vol. 46-47, 2013) study of the impact of calcium and gypsum on the flotation properties of silica in water, Exercises 2.23, 2.34 and 2.40. Recall that zeta...

A Harris Corporation/University of Florida study was undertaken to determine whether a manufacturing process performed at a remote location can be established locally. Test devices (pilots) were set...

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