FREE Trial S
study help categories /Engineering

Top Selling Engineering Questions

Car A is traveling along the straightaway with constant speed v. Car B is moving along the circular on-ramp with constant speed v/2. Determine the velocity and acceleration of car A as seen by an... Car B is rounding the curve with a constant speed of 54 km/h, and car A is approaching car B in the intersection with a constant speed of 72 km/ h. Determine the velocity which car A appears to have... The cars of the roller coaster have a speed v = 25 ft/sec at the instant under consideration. As rider B passes the topmost point, she observes a stationary friend A. What velocity of A does she... The slotted wheel rolls to the right without slipping, with a constant speed v = 2 ft/sec of its center O. Simultaneously, motion of the sliding block A is controlled by a mechanism not shown so that... The sector rotates with the indicated angular quantities about a fixed axis through point B. Simultaneously, the particle A moves in the curved slot with constant speed u relative to the sector.... The elements of a power hacksaw are shown in the figure. The saw blade is mounted in a frame which slides along the horizontal guide. If the motor turns the flywheel at a constant counterclockwise... Determine the angular momentum of the earth about the center of the sun. Assume a homogeneous earth and a circular earth orbit of radius 149.6(10 6 ) km. Consult Table D/2 of Appendix D for other... In a designed experiment, a. What two factors affect the quantity of information? b. How does blocking increase the quantity of information? Many hand tools used by mechanics involve attachments that fit into sockets (e.g., a socket wrench). In the manufacturing of the tools, specifications require that the inside diameter of the socket... Refer to Exercise 16.15. Find a 99% tolerance interval for at least 95% of the distance measurements assuming each of the following: a. A normal distribution b. A non normal distribution Data from... Different signal-flow graphs can represent the same system. Which form facilitates the calculation of the variable gains during controller design? Refer to the x- and R-charts, Exercises 16.15 and 16.24. Conduct a runs analysis to detect any trend in the process. Data from Exercise 16.15 Refer to the manufacture of a rheostat knob, Exercise... Refer to Exercise 16.16 and the hourly data collected by BPI consulting. a. Construct an R-chart for the data. Is the process variation in control? b. Round each measurement in the data set to a... A 200-kg machine rests on four floor mounts, each of which has an effective spring constant k = 250 kN/m and an effective viscous damping coefficient c = 1000 N s/m. The floor is known to vibrate... A soft-drink bottling company is interested in monitoring the amount of cola injected into 16-ounce bottles by a particular filling head. The process is entirely automated and operates 24 hours a... Refer to the manufacture of a rheostat knob, Exercise 16.7. To monitor the process mean, five knobs from each hours production were randomly sampled and the distance from the back of the knob to the... The uniform bar of mass M and length l has a small roller of mass m with negligible bearing friction at each end. Determine the period ???? of the system for small oscillations on the curved track.... Refer to Exercise 14.77 and the study to determine the effects of acid rain on the acidity of soils in a natural ecosystem. Recall that experimental plots were irrigated with acid rain at two pH... Refer to the Journal of Food Engineering (September, 2013) study of the cooling performances fruit container designs, Exercise 14.23. Recall that three container types were investigated Standard,... Refer to the Applied Animal Behavior Science (June 2010) study of stress in cows prior to slaughter, Exercise 14.22. In the experiment, recall that the heart rate (beats per minute) of a cow was... Refer to the IEICE Transactions on Information & Systems (Jan. 2005) comparison of two methods of testing electronic circuits, Exercise 8.50. Recall that each of 11 circuits was tested using the... The plate has a mass of 3 kg and is welded to the fixed vertical shaft, which rotates at the constant speed of 20 rad/s. Compute the moment M applied to the shaft by the plate due to dynamic... Digital versatile disc (DVD) players incorporate several control systems for their operations. The control tasks include (1) keeping the laser beam focused on the disc surface, (2) fast track... The crane has a boom of length OP = 24 m and is revolving about the vertical axis at the constant rate of 2 rev/min in the direction shown. Simultaneously, the boom is being lowered at the constant... The 5-kg bar is released from rest while in the position shown and its end rollers travel in the vertical-plane slot shown. If the speed of roller A is 3.25 m/s as it passes point C, determine the... An analyst tested the null hypothesis 20 against the alternative hypothesis that < 20. The analyst reported a p-value of .06. What is the smallest value of for which the null hypothesis would be... Use LabVIEW with the Control Design and Simulation Module and MathScript RT Module to do the following: Modify the CDEx Nyquist Analysis.vi to obtain the range of K for stability using the Nyquist... Is the navigational behavior of cockroaches scavenging for food random or linked to a chemical trail? In an attempt to answer this question, an entomologist designed an experiment to test a... Find the total steady-state error due to a unit step input and a unit step disturbance in the system of Figure P7.14. D(s) R(s) + 1 100 C(s) s+5 s+2 FIGURE P7.14 Check the assumptions for the randomized block ANOVA of Exercise 14.25. Data from Exercise 14.25 Refer to the Journal of Bacteriology (July 2002) study of the sensitivity of bacteria genes to light,... Refer to the Landscape Ecology Journal (Jan. 2013) study of mowing effects on vegetation in highway rights-of-way, Exercise 14.35. Recall that a 3 3 factorial design was employed to estimate the... Computer mediated communication (CMC) is a form of interaction that heavily involves technology (e.g., instant messaging, e-mail). Refer to the Journal of Computer-Mediated Communication (Apr. 2004)... Refer to the International Journal of Foresting Engineering (Vol. 19, 2008) study of neck muscle activity patterns among forestry vehicle operators, Exercise 12.23. Recall that the researchers... Refer to the International Journal of Foresting Engineering (Vol. 19, 2008) study of neck muscle activity patterns among forestry vehicle operators, Exercise 12.23. Recall that the researchers... Which of the following is the formula for the gage pressure within a very small spherical droplet of water: (a) p = /d, (b) p = 4/d, (c) p = 8/d? Refer to the Journal of the Institute of Engineering (Vol. 8, 2011) study of methane gas (milligrams per liter) emitted from wastewater treatment sludge, Exercises 12.42 and 12.51. Recall that two... Refer to the Journal of the Institute of Engineering (Vol. 8, 2011) study of methane gas (milligrams per liter) emitted from wastewater treatment sludge, Exercise 12.42. Recall that two different... Refer to the Journal of Transportation Engineering (June 2013) study of overcrowding at a train station, Exercise 12.14. Using data collected for a sample of 20 train stops (see below), you analyzed... In the oil industry, water that mixes with crude oil during production and transportation must be removed. Chemists have found that the oil can be extracted from the water/oil mix electrically.... Refer to the Journal of Engineering for Gas Turbines and Power (Jan. 2005) study of a high-pressure inlet fogging method for a gas turbine engine, Exercise 8.29 (p. 392). Recall that the heat rate... Refer to Exercise 14.8. Use Bonferronis method to compare the mean heat rates of the three gas turbine engines. Use = .06. Data from Exercise 14.8 Refer to the Journal of Engineering for Gas... Refer to the Environmental Science & Technology (Jan. 2005) study of the reliability of a commercial kit to test for arsenic in groundwater, Exercise 7.59. Recall that a field kit was used to test a... To improve the quality of the output of any production process, it is necessary first to understand the capabilities of the process (Deming, Out of the Crisis, 1982). In a particular manufacturing... Ecologists classify the cause of forest fragmentation as either anthropogenic (i.e., due to human development activities such as road construction or logging) or natural in origin (e.g., due to... According to the Highway Loss Data Institute (HLDI), hybrid [automobiles] have a safety edge over their conventional twins when it comes to shielding their occupants from injuries in crashes. (HLDI... Refer to the Human Factors (Dec. 1988) study of orientation clues, Exercise 9.6. Conduct a test to compare the proportions of subjects that fall in the three disk-orientation categories. Assume you... Refer to the Human Factors (Dec. 1988) study of color brightness as a body orientation clue, Exercise 7.65. Ninety college students, reclining on their backs in the dark, were disoriented when... The rectangular channel shown is 1.2 m wide. What is the discharge in the channel? Vertical depth = 1m 1/3 u = y"3 m/s Water 30 Water enters the lock of a ship canal through 180 ports, each port having a 2 ft by 2 ft cross section. The lock is 900 ft long and 105 ft wide. The lock is designed so that the water surface in it... The 4-kg mass is suspended by the spring of stiffness k = 350 N/m and is initially at rest in the equilibrium position. If a downward force F = Ct is applied to the body and reaches a value of 40 N... The mechanism shown oscillates in the vertical plane about the pivot O. The springs of equal stiffness k are both compressed in the equilibrium position = 0. Determine an expression for the period ... Determine the amplitude of vertical vibration of the car as it travels at a velocity v = 40 km/h over the wavy road whose contour may be expressed as a sine or cosine function with a double amplitude... The right-circular cone of height h and base radius r spins about its axis of symmetry with an angular rate p. Simultaneously, the entire cone revolves about the x-axis with angular rate . Determine... The hypothetical water velocity in a V-shaped channel (see the accompanying figure) varies linearly with depth from zero at the bottom to maximum at the water surface. Determine the discharge if the... Is the tank in the figure filling or emptying? At what rate is the water level rising or falling in the tank? 6 ft diameter 3 in. diameter 4 in. diameter V= 4 ft/s Water V= 10 ft/s 6 in, diameter V =... The small block of mass m slides along the radial slot of the disk while the disk rotates in the horizontal plane about its center O. The block is released from rest relative to the disk and moves... When asked, How much time will you require to complete this task, cognitive theory posits that people (e.g., an electrical engineer) will typically underestimate the time required. Would the opposite... Refer to the Journal of Marketing Research (Dec., 2011) study of shopping cart design, Exercise 2.43. Design engineers want to know whether you may be more likely to purchase a vice product (e.g., a... A boat is held stationary by a cable attached to a pier. A firehose directs a spray of 5C water at a speed of V = 50 m/s. If the allowable load on the cable is 5 kN, calculate the mass flow rate of... Determine the discharge in the pipe and the pressure at point B. Neglect head losses. Assume = 1.0 at all locations. Water 1.5 m B 40 cm diameter 3.5 m -20 cm diameter nozzle Refer to the Journal of Computer-Mediated Communication (Apr. 2004) study to compare relational intimacy in people interacting via computer-mediated communication (CMC) to people meeting face-to-face... For a given Francis turbine, 1 = 60, 2 = 90, r1 = 5 m, r 2 = 3 m, and B = 1 m. Th e discharge is 126 m 3 /s, and the rotational speed is 60 rpm. Assume T = 10C. a. What should 1 be for a non... This nozzle bends the flow from vertically upward to 30 with the horizontal and discharges water ( = 62.4 lbf/ft 3 ) at a speed of V = 130 ft/s. The volume within the nozzle itself is 1.8 ft 3 , and... The flow-metering device shown consists of a stagnation probe at station 2 and a static pressure tap at station 1. The velocity at station 2 is 1.5 times that at station 1. Air with a density of 1.2... The discharge of water through this turbine is 1000 cfs. What power is generated if the turbine efficiency is 85% and the total head loss is 4 ft? H = 100 ft. Also, carefully sketch the EGL and the... The maximum rise of a liquid in a small capillary tube is a function of the diameter of the tube, the surface tension, and the specific weight of the liquid. What are the significant -groups for the... The cube shown weighing 110 N and measuring 39 cm on a side is allowed to slide down an inclined surface on which there is a film of oil having a viscosity of 102 N s /m 2 . What is the velocity of... In the flow through an orifice shown in the diagram, theflow goes through a minimum area downstream of the orifice. This is called the vena contracta. The ratio of the flow area atthe vena contracta... The annular venturi meter is useful for metering flows in pipe systems for which upstream calming distances are limited. The annular venturi meter consists of a cylindrical section mounted inside a... Use Table 10.5 (10.8) to select loss coefficients, K, for the following transitions and fittings. a. A threaded pipe 90 elbow b. A 90 smooth bend with r/d = 2 c. A pipe entrance with r/d of 0.3 d. An... A rotameter operates by aerodynamic suspension of a weight in a tapered tube. The scale on the side of the rotameter is calibrated in scfm of airthat is, cubic feet per minute at standard conditions... Following is a list of approximate conversion factors, useful for back-of-the-envelope estimates. None of them is exact, but most are accurate to within about 10%. Use Table A.1 (App. A) to establish... Gas at constant T and P is contained in a supply line connected through a valve to a closed tank containing the same gas at a lower pressure. The valve is opened to allow flow of gas into the tank,... Various species of hagfish, or slime eels, live on the ocean floor, where they burrow inside other fish, eating them from the inside out and secreting copious amounts of slime. Their skins are widely... Determine the standard heat of each of the following reactions at 25C: (a) N 2 (g) + 3H 2 (g) 2NH 3 (g) (b) 4NH 3 (g) + 5O 2 (g) 4NO(g) + 6H 2 O(g) (c) 3NO 2 (g) + H 2 O(l) 2HNO 3 (l) + NO(g) (d)... Rationalize the following rule of thumb, appropriate for an equimolar binary liquid mixture: GE (equimolar) RT 1 The first step in the metabolism of ethanol is dehydrogenation by reaction with nicotinamide-adenine dinucleotide (NAD): C 2 H 5 OH+ NAD + C 2 H 4 O+NADH What is the heat effect of this reaction... Four components A, B, C, and D are placed in parallel to make a subassembly in a circuit board. The reliabilities of A, B, C, and D are 0.93, 0.88, 0.95, and 0.92, respectively. Find the reliability... Air enters a gas-turbine engine (see Fig. 8.11) at 305 K and 1.05 bar and is compressed to 7.5 bar. The fuel is methane at 300 K and 7.5 bar; compressor and turbine efficiencies are each 80%. For one... A remote control unit has 40 components in series. The reliability of each component is 0.9994. What is the reliability of the remote control unit? If a redesign has 25 components in series, what is... An electronic component in a video recorder has an exponential time-to-failure distribution. What is the minimum mean time to failure of the component if it is to have a probability of 0.92 of... Consult your reference library and find another explanation of hole versus electron flow. Using both descriptions describe in your own words the process of hole conduction. Consider a chloroform(1)/tetrahydrofuran(2) mixture with x 1 = 0.80, initially at 70C and 120 kPa. Describe the evolution of phases and phase compositions as the temperature is gradually increased to... Consider a binary liquid mixture for which the excess Gibbs energy is given by G E /RT = Ax 1 x 2 . What is the minimum value of A for which liquid/liquid equilibrium is possible? To the xy diagram... Determine the output voltage for the circuit of Fig. 11.52. Fig. 11.52 330 k2 470 k2 33 ka V1 12 mV 47 k2 V. 47 ka 18 mV a. Find the value of R S to obtain a voltage gain of 2 for the network of Fig. 8.74 using r d = . b. Repeat part (a) with r d =30 k . What was the impact of the change in r d on the gain and the... Determine and V G for a PUT with V BB = 20 V and R B1 = 3R B2 . Following are VLE data for the system acetonitrile(1)/benzene(2) at 45C: The data are well correlated by the three-parameter Margules equation (see Prob. 13.37). (a) Basing calculations on Eq.... For the network of Fig. 7.86 , V D = 12 V. Determine: a. I D . b. V S and V DS . c. V G and V GS . d. V P . o 20 V 2.2 k2 910 k2 Ipss = 10 mA %3D Vp = -3.5 V Vose 110 k2 1.1 k2 FIG. 7.85 What is the composition of the azeotrope for the ethanol(1)/ethyl acetate(2) system? Would this be called a high-boiling or low-boiling azeotrope? Problems 12.3 through 12.8 refer to the Pxy diagram... Make a thermodynamic analysis of the refrigeration cycle described in one of the parts of Prob. 9.9. Assume that the refrigeration effect maintains a heat reservoir at a temperature 5C above the... Two special models of liquid-solution behavior are the regular solution, for which S E = 0 everywhere, and the a thermal solution, for which H E = 0 everywhere. (a) Ignoring the P-dependence of G E ,... Find V S for the network of Fig. 7.84 . 20 V 2.2 k2 Ipss = 4.5 mA Vp =-5 V Vps 0.68 k2 -4 V FIG. 7.83 a. Using the characteristics of Fig. 3.8, determine the resulting collector current if I E = 3.5 mA and V CB =10 V. b. Repeat part (a) for I E = 3.5 mA and V CB = 20 V. c. How have the changes in V... Repeat Problem 26 if rd = 20 k and compare results. Problem 26 Repeat Problem 25 with the capacitor C S removed and compare results. Problem 25 Determine Z i , Z o , and V o for the network of Fig.... Using the characteristics of Fig. 3.13: a. Find the value of IC corresponding to V BE =750 mV and V CE = 4 V. b. Find the value of V CE and V BE corresponding to I C = 3.5 mA and I B =30 mA. tle (mA)... For the network of Fig. 5.166 , determine A v . 8 V 3.6 k2 +6 V -10 V B= 75 Sas =5 uS 6.8 k2 4.7 k2 3.9 k2 a = 0.998 Bos = 10 S -5 V FIG. 5.165 FIG. 5.166 For the network of Fig. 5.163 : a. Determine Z i and Z o . b. Find A v . c. Calculate V o if Vi = 1 mV. Fig. 5.163 12 V B = 120 r, = 40 k2 Z 390 k2 5.6 k2 -8 V FIG. 5.163 For the network of Fig. 5.157 : a. Determine r e . b. Find the dc voltages V B , V CB , and V CE . c. Determine Z i and Z o . d. Calculate A v = V o > V i . V Z. B= 70 ro = 60 kn 24 V 3.3 kn 2.2 k 12... a. Determine V DS for V GS = 0 V and I D = 6 mA using the characteristics of Fig. 6.11 . Fig. 6.11 b. Using the results of part (a), calculate the resistance of the JFET for the region I D = 0 to 6...
Showing 1100 - 1200 of 2450