New Semester Started Get 50% OFF Study Help! --h --m --s Claim Now

Question Answers

Textbooks

Find textbooks, questions and answers

Oops, something went wrong!

Change your search query and then try again

Result Not Found

Books FREE
Study Help
Tutors
AI Study Planner NEW
Sell Books

Search
Sign In
Register

study help
engineering
exploring engineering introduction

Exploring Engineering An Introduction to Engineering and Design 2nd edition Philip Kosky, George Wise, Robert Balmer, William Keat - Solutions

A car leaves a parking space from a standing stop to travel to a fast-food restaurant 950 meters away. Along the journey it has to stop after 325mat a stop sign. It has a maximumacceleration of 3.0m/s2 and a maximum deceleration of -10. m/s2. It never exceeds the legal speed limit of 15. m/s. What
Based on your experience as a driver or a passenger in a car, estimate (with calculations) the maximum deceleration achieved by putting maximum pressure on the brakes when traveling at 30 mph.
For the previous problem, supply a table and draw a graph showing the distance, speed, and acceleration of the car versus time.Use the v-t diagram for this exercises.Previous problem 15 m/s v, m/s d= 100.m 1. S 0,0
A car starts from a stop at a traffic light and accelerates at a rate of 4.0 m/s2. Immediately on reaching a speed of 32. m/s, the driver sees that the next light ahead is red and instantly applies the brakes (reaction time ¼ 0.00 s). The car decelerates at a constant rate and comes safely to a
A car is alone at a red light. When the light turns green, it starts off at constant acceleration. After traveling exactly one-eighth of a mile, it is traveling at 30. mph. What is its acceleration in m/s2?Use the v-t diagram for this exercises. 15 m/s v, m/s d= 100.m 1. S 0,0
A car is alone at a red light. When the light turns green, it starts off at constant acceleration. After traveling 100. m, it is traveling at 15. m/s. What is its acceleration?Use the v-t diagram for this exercises. 15 m/s v, m/s d= 100.m 1. S 0,0
Sara, a recent graduate, accepts a position at a small engineering design firm. Her new colleagues form a tightly knit, congenial group, and she often joins them for get togethers after work. Several months after she joins the firm, the firm’s president advises her that his wife has objected to
Part of the mechanism of a toilet is the system that refills the toilet tank after a flush. A conceptual sketch is shown below. Water enters the tank through an annular opening around the plug; eventually the water level, WL, in the tank rises and the float also rises, pushing down the plug and
A steam reformer is fed 1.00 liters/s of methane, 0.952 liters/s of air, and 1.00 liters/s of steam. If it reaches its stoichiometric maximum extent of reaction, what is the composition of its product gases? Assume all quantities given in standard liters/s (1.00 bar, 0°C basis).
Consider the following electric circuit: Consider the variables L = “the light is on,” A = “switch A is closed,” and B ¼ “switch B is closed.” Express the relationship depicted by the electric circuit as a logic equation for L in terms of A and B. A в
Draw lines of constant discharge time on the Ragone plot. Interpret these lines. Energy/power = time. On a log-log plot since time is represented only to the first power, its slope is 1, which is represented as one ordinate decade to one abscissa decade.
Download the West Point Bridge Designer software from http://bridgecontest.usma.edu and use it to design a truss.
Depending on which of Exercises 7 through 12 you have completed, determine the required crosssectional areas of the members comprising one or more of the following structures. Assume steel members with a factor of safety of N = 3.0, a yield strength of SY = 36. × 106 lbf/in2 (or 250 MPa), and an
Depending on which of Exercises 7 through 12 you have completed, determine the overall factor of safety of one or more of the following structures. Assume steel members with a yield strength of SY = 36. × 106 lbf/in2 (or 250 MPa) and an elastic modulus of E = 29. × 106 lbf/in2 (or 200 GPa).Also
Calculate the required cross-sectional areas of the members comprising the truss bridge of Figure 12.14. Refer to Figure 12.17 for the forces and design for a factor of safety of N = 5.0. Assume steel members (SY = 36. ×106 lbf/in2, E = 29. × 106 lbf/in2) with square cross-sections, and consider
Calculate the overall factor of safety of a truss that has the member forces, lengths, and cross sectional areas given in the table. Assume steel members (SY = 36.×106 lbf/in2, E = 29. × 106 lbf/in2) with square cross-sections, and consider buckling. Member 1 2 3 4 5 -9060 -9060 Force (Ib)
A truss that is pinned at one end and on rollers at the other will be statically determinate if it satisfies the following equation:0 = 2j - m - 3where j is the number of joints and m is the number of members. This is a quick way to check for static determinacy without drawing the FBDs. Apply this
Determine the forces on all members by the method of joints. Use Excel to solve the equations. 4.00 ft B D 4.00 ft E F H G 800. Ibf 800. Ibf 1600. Ibf 4.00 ft 4.00 ft 4.00 ft 4.00 ft
Determine the forces on all members by the method of joints. Use Excel to solve the equations. B 10.0 ft А D F 1000. Ibf 1000. Ibf 7.00 ft 7.00 ft '7.00 ft E.
Determine the forces on all members by the method of joints. Use Excel to solve the equations. C D 4.00 m A E 8.00 kN 4.00 m 4.00 m B.
Determine the forces on all members by the method of joints. Use Excel to solve the equations. 3.00 m A E 5.00 kN 3.00 m 3.00 m
Determine the forces on all members by the method of joints. Use Excel to solve the equations. 900. Ibf A 5.00 ft D 15.0 ft 15.0 ft
Determine the forces on all members by the method of joints. Use Excel to solve the equations. 1000. Ibf 5.00 ft A 7.00 ft 7.00 ft
Photos of four existing bridges are shown. For each bridge, write a paragraph that describes in specific terms the strategies used by the designer to make it an efficient structure. General strategies to draw from include: efficient beam cross-sections, trusses, arches, use of tension members (or
For the structure below, do your best to identify all of its members as beams, compression members, or tension members. D E F A G 5.0 kN 5.0 kN cable 10. kN cable
Determine the forces acting on the ends of the rope by (1) drawing the free-body diagram, (2) counting unknowns and equations to check determinacy, (3) writing the equilibrium equations, and (4) solving the equations. 500. Ibf 7.00 ft 2.00 ft 10.0 ft 14.00 ft
Determine the forces acting on the ends of the rope by (1) drawing the free-body diagram, (2) counting unknowns and equations to check determinacy, (3) writing the equilibrium equations, and (4) solving the equations. 1.20 kN 4.00 m T100 m 20.0 m 8.00 m
Determine the forces acting on the ends of the rope by (1) drawing the free-body diagram, (2) counting unknowns and equations to check determinacy, (3) writing the equilibrium equations, and (4) solving the equations. 1.50 kN 8.00 m 30.0 m
When estimating the live load for a new bridge design, you want that estimate to be conservative. In other words, you want to error on the safe side by basing the estimate on the worst possible scenario—for example, bumper-to-bumper traffic, the heaviest vehicles, the worst environmental
As quality control engineer for your company, you must approve all material shipments from your suppliers. Part of this job involves testing random samples from each delivery and making sure they meet your company’s specifications. Your tests of a new shipment of carbon steel rods produced yield
Your company wants to enter a new market by reverse-engineering a popular folding kitchen step stool whose patent recently has expired. Your analysis shows that by simplifying the design and making all the components from injection-molded PVC plastic you can produce a similar product at a
Suppose a shield exactly 0.01 m thick of the material in exercise 18 exactly met the requirement of surviving without denting or damage at a strain of -0.10, yet any thinner layer would not survive. What are the yield stress and elastic modulus of the material?Involve the situation depicted below.
Suppose you were required to use a micrometeorite shield no more than 0.01 meters thick. What would be the required toughness of the material from which that shield was made if the shield must survive a micrometeorite strike without being permanently dented or damaged?Involve the situation depicted
Using the stress–strain properties for a polymer (Figure 11.13 and Table 11.1), determine whether a sheet of this polymer 0.10 m thick could serve as a micrometeorite shield if this time the shield must survive a micrometeorite strike without being permanently dented or damaged. Assume the
Using the stress–strain diagram for steel in Figure 11.11, determine the minimum thickness a steel micrometeorite shield would have to be to protect the spacecraft from destruction (even though the shield itself might be dented, cracked, or even destroyed in the process).Involve the situation
In exercise 14, what is the highest speed the artillery shell can have and still bounce off the armor plate without penetrating it?Imagine the idealized situation as shown in Figure A for an artillery shell striking an armor plate made of an (imaginary) metal called “armory.” Figure B is the
Which of the following will happen as a result of the collision in the exercise 13? Support your answer with numbers.a. The shell will bounce off without denting the armor plate.b. The armor plate will be damaged but will protect the region beyond it from the collision.c. The shell will destroy the
Assume that the energy transferred in the collision between the shell and the armor plate in exercise 12 affects only the shaded area of the armor plate beneath contact with the flat tip of the shell (a circle of diameter 0.010 m) and does not spread out to affect the rest of the plate. What is the
Suppose the shell has a mass of 1.0 kg and is traveling at 3.0 × 102 m/s. How much TKE does it carry?Imagine the idealized situation as shown in Figure A for an artillery shell striking an armor plate made of an (imaginary) metal called “armory.” Figure B is the stress–strain diagram for
How many coats having the same mass as those in exercise 10 must be hung on the hanger to cause the neck to remain permanently stretched (i.e., plastically deformed) after the coats are removed?Exercise 10A coat hanger is made from polyvinyl chloride. The neck of the coat hanger is 0.01 m in
A coat hanger is made from polyvinyl chloride. The neck of the coat hanger is 0.01 m in diameter and initially is 0.10 m long. A coat hung on the coat hanger causes the length of the neck to increase by 1.0 × 10-5 m. What is the mass of the coat? The stress–strain diagram is provided. Properties
What is the maximum number of coffee cups in Exercise 8 that can be stacked vertically on the saucer and not cause a permanent dent in the plate?Assume that a silicone rubber19 has this stress–strain diagram. 150 - Stress, MPa 100 50 + -1.5 -1.0 -0.5 0.5 1.0 1.5 -50 Fractional Strain -100
A flat saucer made of silicon rubber has an initial thickness of 0.0050 m. A ceramic coffee cup of diameter 0.10 m and mass 0.15 kg is placed on the saucer. What is the final thickness of the saucer beneath the cup, assuming that the force of the cup acts directly downward and is not spread
What is the yield strength under compression of the silicone?Assume that a silicone rubber19 has this stress–strain diagram. 150 - Stress, MPa 100 50 + -1.5 -1.0 -0.5 0.5 1.0 1.5 -50 Fractional Strain -100 Stress-Strain Diagram for Silicone Rubber
A plate of elastic modulus 1.00 GPa is subjected to a compressive stress of 1.00 × 103 Pa as in Figure B. What is the strain on the plate?The following figures depict the situations described in above exercise. Diameter 0.20 mm L Cube Mass M Mass M Plate · 1.00 m 1.00 m A В
Suppose the wire in Figure A is perfectly elastic. When subjected to a stress of 1.00 × 104 Pa, it shows a strain of 1.00 × 10-5. What is the elastic modulus (i.e., Young’s modulus) of the wire?The following figures depict the situations described in above exercise. Diameter 0.20 mm L Cube Mass
Suppose the plate described in exercise 3 and Figure B was 0.011 m thick before the cube was placed on it. Suppose that placing the cube on it causes a compressive strain of -0.015. How thick will the plate be after the cube is placed on it?The following figures depict the situations described in
In Figure B, when a block of metal 1.00 m on a side is placed on a metal plate 1.00 m on a side, the stress on the plate is 1.00 x 103 N/m2. What is the mass of the metal cube?The following figures depict the situations described in above exercise. Diameter 0.20 mm L Cube Mass M Mass M Plate ·
If the wire in Figure A is stretched from 1.00 m to 1.01 m in length, what is the strain of the wire?The following figures depict the situations described in above exercise. Diameter 0.20 mm L Cube Mass M Mass M Plate · 1.00 m 1.00 m A В
A mass of M = 1.0 kg is hung from a circular wire of diameter 0.20 mm as shown in Figure A. What is the stress in the wire?The following figures depict the situations described in above exercise. Diameter 0.20 mm L Cube Mass M Mass M Plate · 1.00 m 1.00 m A В
You are a new engineer working for a motorcycle manufacturer that produces a bike with a known control system instability. This instability can cause the rider to lose control at high speed and crash. Your supervisor says that you should ignore it because everyone knows about it and it would be too
You work for the control and guidance systems division of a major aircraft manufacturer with a major government contract. You observe employees who regularly leave work early while being paid for time not worked. What do you do?a. Ignore it, since there is nothing you can do anyway.b. Talk to your
Some skeptics have suggested that we are not entering a man-made period of global warming but instead are entering a mini ice age (as Earth has done many times before in its 4+ billion year history). Consider this simple block model of the conflicting possibilities:In this model the calculated warm
Referring to Figure 10.12, when a throttle plate rotates in a circular plenum, its effective blocking area is πab where a, b are the principal axes of an ellipse. Show that where A is the fully open area of the pipe and △A is the open area when the plate has been turned through an
In this chapter, we have discussed but not derived, an equation for the transient inertial limited response to engine power and to windage losses. The equation isin which P(engine) and P(losses), respectively, are the engine’s power output and the air resistance losses. The vehicle has mass m.
Do you really need a cruise control? Suppose you are driving in the Midwest on a flat road. You are bored with the monotony of the terrain and you set a brick against the accelerator pedal that maintains the vehicle’s speed to 60. mph. Unexpectedly, you drive onto a construction road that is 10.
Suppose a car employs a digital speed sensor as shown in Figure 10.15, and the car’s wheels are each 0.60 meters in diameter. If the speed sensor consists of the magnet and coil and the magnet induces one pulse in the coil for every revolution of the axle, how many pulses per second will the coil
Use the block diagram developed in the previous exercise. Assume the room is initially at T0 = 15°C and the set point for the furnace is 22°C. The furnace heat rate is Q = 1000. W and the room losses are QL = 20. × (TM - T0). The response function for the room is 0.003 × QNet °C per minute
The conceptual sketch below shows a model of a closed loop control for heat in a room. Prepare a block diagram for this closed loop control. Label each block on the block diagram with the name of the corresponding component or components on the sketch. To simplify, assume the furnace delivers the
Suppose that for the open loop toaster control you sketched in exercise 5, the variable that you really want to control is d (for darkness), where d is the energy absorbed by the toast, in units of joules. Assume the initial energy of the toast (in units of joules) is d = 0, and dt+1 = dt + K × P
The conceptual sketch below shows a model for a closed loop control of a lawnmower engine. Unlike the lawn mower motor of exercise 7, there is a feedback device. It takes advantage of a cooling fan that is connected directly to the output shaft of the lawn mower. This fan blows on a flap indicated
Suppose a simplified thermostatic room controller operates a furnace that can deliver heat to a room at the rate of 1000. watts. The initial temperature of the room is TR = 20.0°C and the outside temperature is T0 = 10.0°C. TRoom, t+1 TRI+10 = TRI+ 0.0005 x QNet Room Transfer fn QNet = [1000 –
The conceptual diagram and block diagram for open loop control of a 1000. W microwave oven are shown below. (The “magnetron” is the device that delivers the microwaves into the oven’s cavity.) Assume the control is turned on to value C = 1 at time t = 0 and left on thereafter. Prepare a
The conceptual diagram and block diagram of an open loop control for a lawnmower engine are shown below.Assume the control is turned on at time t = 0 and left on thereafter. Use the proportional gains for the throttle = 0.001 kg/s and for the engine = 1000. kW/kg/s as shown in the block diagram.
The conceptual diagram of an open loop control for the heating of a room is shown below.The room achieves a given temperature as a function of the added heat from the radiator and the heat loss QL from the room. But, for simplicity, ignore QL as being too slow to influence the immediate response.
The conceptual sketch for a closed loop control for a toaster is shown below. The controller is a bimetallic switch. It works by combining two metals of different thermal expansion so that, when heated, it bends away from the more expansive metal and can then open a pair of contacts. The heat is
The conceptual sketch for an open loop control for a toaster is shown. Draw a block diagram of the system, indicating on the diagram which parts of the conceptual sketch correspond to the blocks. Heater (Resistor) Switch 110 V Wall Plug Radiant Heat Toast
The following circuit diagram represents a closed loop system for lighting control in an otherwise dark room. Assume you want a lightbulb to provide constant illumination of strength LD even if the strength of the lightbulb appreciably changes with age. Light control is achieved by a suitable light
The following circuit diagram is an open loop control for tuning on or off a light. Draw a block diagram of the control. Why is it considered open loop?A: The bulb is on and stays on provided the switch is closed, day or night, needed or not, until the switch is turned off manually. Then the same
You are a software engineer at a small company. You have written a software program that will be used by a major manufacturer in a popular product line. Your supervisor asks you to install a “back door” into the program that no one will know about so that he can monitor its use by the public.
A company purchased a computer program for your part-time job with them. The license agreement states that you can make a backup copy, but you can use the program on only one computer at a time. Since you have permission to make a backup copy, why not make copies for friends? What do you do?a. Go
In the game “Rock, Scissors, Paper” we have the following rules:Rock breaks ScissorsScissors cut PaperPaper covers RockIf we were to create a code to represent the three entities, Rock, Scissors, and Paper, we would need two bits. Suppose we have the following code, where we call the first bit
Construct a spreadsheet that converts decimal number 53 to binary. Print as formulae using the Control-tilde command. Check your spreadsheet against exercise 15. 5 (decimal) can be divided by 22 toyield an integer 1 and remainder 1; 1 can’t be divided by 21 (therefore, integer 0) and 1 can be
Construct a spreadsheet12 that converts binary numbers from 0 to 111 to decimal numbers, print as formulae using the Control-tilde command. Check your spreadsheet against exercise 14.Exercise 14.Convert the following numbers from binary to decimal:(a) 110,(b) 1110, (c) 101011. Partial A: 25 24
Suppose we want to devise a binary code to represent the fuel levels in a car:a. If we need to describe only the possible levels (empty, 1/4 full, 1/2 full, 3/4 full, and full), how many bits are needed?b. Give one possible binary code that describes the levels in (a).c. If we need to describe the
If a powerful race car has an (A/F)Mass of 12.0 (kg air)/(kg fuel), and the air intake draws in 1.000 kg of air per second, how much fuel must be injected every second? Solve in binary to three significant binary digits.
Do the following binary subtractions. Check your answer by converting each binary number into decimal. Partial A: Binary Decimal Binary Decimal Binary Decimal 1010 10 11101 10000 -110 -6 -10011 -1 0100 4
Do the following binary additions. Check your answer by converting each binary number into decimal. Partial A: Binary Decimal Binary Decimal Binary Decimal 1010 10 11101 10111 +110 +10011 +10 10000 16
Convert the following numbers from decimal to binary:(a) 53,(b) 446, (c) 1492. Partial A: Decimal 1024 512 256 128 64 32 16 8 4 2 1 210 2° 28 27 26 25 24 23 22 2' 20 Binary place a) 53 1 1 1 1 b) 446 c) 1492
Convert the following numbers from binary to decimal:(a) 110,(b) 1110, (c) 101011. Partial A: 25 24 23 22 21 20 Decimal Equivalent 32 16 8 4 2 1 - a) 110 0 x 32 0 x 16 0 x 8 1 x 4 1 x 2 0 x1 b) 1110 c) 101011
Explain the following sentences.a. There are 10 kinds of people in the world, those who understand binary numbers, and those who don’t.b. Binary is as easy as 1, 10, 11.
Consider the following logic variables for a car:W = “the seatbelt warning light is on”Ps = “there is a passenger in the passenger seat”Db = “the driver’s seat belt is fastened”Pb = “the passenger seat belt is fastened”Draw a circuit diagram for the logic equation W = Db' + (Ps
Consider the following circuit diagram and the variables L = “the light is on,” A = “switch A is closed,” B = “switch B is closed,” and C = “switch C is closed.” Write a logic equation for L in terms of A, B, and C. А В C L
Consider the following variables expressing a football team’s strategy.T = “It is third down”L = “We must gain more than 8 yards to get a first down”P = “We will throw a pass”The team’s strategy is expressed by this truth table.Write a logic equation for P in terms of T and L. 1 1 1
Consider the sentence, “If a customer at a restaurant is over 21 and shows proper identification, then she can order an alcoholic beverage.” (a) Express this sentence as a logic equation, and (b) write a truth table for the logic equation.
Consider the following logic variables for a car:M = “the motor is running”Db = “the driver’s seat belt is fastened”In the early 1970s the government ordered all seat belt warnings to be tied to the motor in a manner expressed by the following sentence: “If the driver’s seat belt is
Consider the following logic variables for a car:W = “the seatbelt warning light is on”D = “a door of the car is open”Ps = “there is a passenger in the passenger seat”K = “the key is in the ignition”M = “the motor is running”Db = “the driver’s seat belt is fastened”Pb =
In Example 9.3, include the additional Boolean variable that for actuation of the warning light, “the driver’s door must be closed” (Ddoor is true if the driver’s door is closed).Example 9.3Suppose we want to find a Boolean expression for the truth of the statement “W = The seat belt
Consider the following logic variables for a car:Db = “the driver’s seat belt is fastened”Pb = “the passenger seat belt is fastened”W = “the seatbelt warning should be on in my car”Write a sentence in English that expresses the logic equation W = Db' + Pb'.
Rework Example 9.2 to express and evaluate the logic formula to answer the question, “If the speed is below the set speed and the set speed is above the speed limit, then will the throttle be opened?”Example 9.2Consider the statement involving an automobile cruise control set at a certain speed
For the ditty in Exercise 1, (a) express as a logic formula the conditions under which one may flush the toilet, (b) evaluate the formula you wrote in (a) for M = 1 and S = 1, and (c) express in words the meaning of your answer to (b). (Assume that any behavior not explicitly forbidden is
A popular ditty of the late nineteenth- and early twentieth-century railroad era was the following (sung to the tune of Humoresque by the nineteenth-century Czech composer Antonin Dvorak):Passengers will please refrain – From flushing toilets – While the train – Is standing in the station –
You are the CEO of a company that has developed a new fuel cell invented by one of your company’s most creative engineers. After thoroughly testing the system for safety and reliability under a wide range of ordinary conditions, you arrange a sale to a customer operating under unusually stressful
You are an engineer on a team developing a radically new battery invented by your immediate supervisor, a successful and famous inventor. Preliminary tests suggest that the new battery, if used in automobiles, will triple range over the best existing battery. Detailed tests have not been made as to
For the reformer in the two previous questions, what is its maximum electrical power production?Previous two questionsA steam reformer is fed 1.00 liters/s of methane, 0.952 liters/s of air, and 1.00 liters/s of steam. If it reaches its stoichiometric maximum extent of reaction, what is the
The same reformer as in the previous problem has a problem—the 3.00 liters/s of H2 is contaminated with 0.600 liters/minute of CO. Assume the shift reactor removes this contaminant down to 10.0 ppm of CO. What is the final composition of gas?
A methanol fuel cell is used as a battery for a laptop whose average electrical demand is 20. W at 10.0 V. Each cell produces 0.50 V. How much methanol in ml is needed each day? Methanol density is 792 kg/m3.
Solid oxide fuel cells use unique electrolytes—a hard ceramic, based on a solid state solution of zirconium oxide stabilized by the element yttrium, and which will conduct oxygen ions when hot enough (which is about 1,000°C). The anode is a Ni/ceramic material and the cathode is an exotic
If you run a fuel cell in reverse as an electrolysis cell, H2O is split into its elementary gases, H2(g) and = O2(g). This way you can make hydrogen and have it stored in case of the loss of outside electric power. The hydrogen can then be fed back to your electrolysis unit acting as a fuel cell.
In the same fuel cell configuration as in exercise 12, the actual voltage delivered by the cell varies with load; assume the voltage measured at full load is 0.75 V so that the cell electrolytic efficiency is 0.75/ 1.23 = 61.%. How many cells will we need in series and what is the fate of this

Showing 100 - 200 of 407

1
2
3
4
5

Step by Step Answers

Services

Sitemap
Fun
Definitions
Become Tutor
Used Textbooks
Study Help Categories
Recent Questions
Expert Questions
Campus Wear
Sell Your Books

Company Info

Security
Copyrights
Privacy Policy
Terms & Conditions
SolutionInn Fee
Scholarship
Online Quiz
Give Feedback, Get Rewards

Get In Touch

About Us
Contact Us
Career
Jobs
FAQ
Student Discount
Campus Ambassador

Secure Payment

Download Our App

© 2026 SolutionInn. All Rights Reserved