Thinking Like an Engineer: An Active Learning Approach (4th Edition)
4th Edition
ISBN: 9780134639673
Author: Elizabeth A. Stephan, David R. Bowman, William J. Park, Benjamin L. Sill, Matthew W. Ohland
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 17, Problem 15RQ
If an object is heated, the temperature of the body will increase. The energy (Q) associated with a change in temperature (ΔT) is a function of the mass of the object (m) and the specific heat (Cp). In an experiment, heat is applied to the end of an object, and the temperature change at the other end of the object is recorded. This leads to the theoretical relationship shown. An unknown material is tested in the lab, yielding the following results:
- a. Create a proper plot of the experimental temperature change (ΔT, ordinate) versus the heat applied (Q, abscissa).
- b. Use polyfit to determine a linear relationship for the data set and graph the resulting trendline along with the experimental data.
- c. Create a proper plot of the theoretical model that represents the temperature change (ΔT, ordinate) versus the heat applied (Q, abscissa). Consider the mass (m) to be 5 kilograms and the specific heat (Cp) to be copper at 0.39 joules per gram kelvin.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
The heat transfer conducted through material is calculated from the equation:
Q = KX AXTD/L
Where K: Conductivity of material
A: Area of heat transfer
TD: Temperature difference across material
L: Thickness of material
A student measures the area, thickness and temperature difference and assumes that the error in conductivity is negligible. The
student also estimates the uncertainty range for each variable.
In estimating the maximum possible value of Q, the student should use the following formula:
A
B
Q max= K x A max x TD max / L max
Q max= K x A max x TD max / L nom
Q max= Q nominal + dQ/dLmin
Q max= K x A max x TD max / L min
A thermocouple is used to
measure the temperature T1. The
thermocouple reference junction
labeled 2 is at a temperature of
20°C. The voltage output is
measured using a potentiometer
and found to be 4.686 mV. What
is T1 in degrees
RK: if the temperature values are
not in the table, you have to use
interpolation.
Select one:
O a. 98
O b. 118
O c. 105
O d. 108
Previous page
Next page
The stress profile shown below is applied to six different biological materials:
Log Time (s]
The mechanical behavior of each of the materials can be modeled as a Voigt body. In response to o,= 20 Pa
applied to each of the six materials, the following responses are obtained:
2 of
Maferial 6
Material 5
0.12
0.10
Material 4
0.08
Material 3
0.06
0.04
Material 2
0.02
Material 1
(a) Which of the materials has the highest Young's Modulus (E)? Why?
Log Time (s)
(b) Using strain value of 0.06, estimate the coefficient of viscosity (n) for Material 6.
Stress (kPa)
Strain
Chapter 17 Solutions
Thinking Like an Engineer: An Active Learning Approach (4th Edition)
Ch. 17.1 - a. Write an input statement to ask for the users...Ch. 17.1 - Prob. 2CCCh. 17.1 - Prob. 3CCCh. 17.1 - Prob. 4CCCh. 17.1 - a. Create an input dialog that asks users for...Ch. 17.2 - Assume that the variable M is stored in the...Ch. 17.2 - Prob. 7CCCh. 17.2 - Prob. 8CCCh. 17.3 - Create a proper plot of the function D = 50 3t...Ch. 17.3 - Comprehension Check 17-1 0 Create a proper plot of...
Ch. 17.3 - Prob. 11CCCh. 17.4 - Prob. 12CCCh. 17.4 - Prob. 13CCCh. 17.4 - Prob. 14CCCh. 17 - Write a MATLAB statement that results in the input...Ch. 17 - You are writing code that is part of a purchasing...Ch. 17 - For each question dialog described below, write a...Ch. 17 - For each input dialog described below, write a...Ch. 17 - For the following questions, assume z = 100/810....Ch. 17 - For the following questions, z = 100/810. Write...Ch. 17 - Assume that the following variables are stored in...Ch. 17 - Assume that a three-element row vector v already...Ch. 17 - The tiles on the space shuttle are constructed to...Ch. 17 - The specific gravity of acetic acid (vinegar) is...Ch. 17 - Write a MATLAB program that will allow a user to...Ch. 17 - Write a program that will allow the user to type a...Ch. 17 - In order to calculate the pressure in a flask,...Ch. 17 - Write a program that will allow the user to type...Ch. 17 - Use a question dialog to determine whether the...Ch. 17 - Write a MATLAB program that will ask users to...Ch. 17 - Write a program that asks a user to enter, one at...Ch. 17 - Joules first law, also known as the Joule effect,...Ch. 17 - Create a proper plot of the following set of...Ch. 17 - There is currently an effort in the United States...Ch. 17 - You want to create a graph showing the theoretical...Ch. 17 - In 1619, Johannes Kepler proposed his third law of...Ch. 17 - The decay of a radioactive isotope can be...Ch. 17 - Create a proper plot of the theoretical voltage...Ch. 17 - Plot the following functions as assigned by your...Ch. 17 - Plot the following functions as assigned by your...Ch. 17 - Prob. 28ICACh. 17 - Enter the following data into MATLAB. Graph the...Ch. 17 - If an object is heated, the temperature of the...Ch. 17 - The resistance of a typical carbon film resistor...Ch. 17 - Today, most traffic lights have a delayed green,...Ch. 17 - Cadmium sulfide (CdS) is a semiconducting material...Ch. 17 - Your supervisor has assigned you the task of...Ch. 17 - Three different diodes were tested: a constant...Ch. 17 - Design a program that will ask the user to enter...Ch. 17 - If a hot liquid in a container is left to cool,...Ch. 17 - You are an engineer working for M M / Mars...Ch. 17 - 1. The specific gravity of gold is 19.3. Write a...Ch. 17 - An unmanned X-43A scramjet test vehicle has...Ch. 17 - A rod on the surface of Jupiter's moon Callisto...Ch. 17 - The Eco-Marathon is an annual competition...Ch. 17 - Your company wishes to write a computer program...Ch. 17 - You are developing a program to record information...Ch. 17 - In a factory, various metal rods are forged and...Ch. 17 - Write a function and program to determine the mass...Ch. 17 - Write a program to calculate a temperature...Ch. 17 - You are part of an engineering firm on contract...Ch. 17 - You want to create a graph showing the...Ch. 17 - When one tries to stop a car, both the reaction...Ch. 17 - If an object is heated, the temperature of the...Ch. 17 - Capillary action draws liquid up a narrow tube...Ch. 17 - In a turbine, a device used for mixing, the power...Ch. 17 - A pilot tube is a device that measures the...Ch. 17 - Prob. 19RQCh. 17 - Download the weekly retail gasoline and diesel...Ch. 17 - A sample of the data provided in the Microsoft...Ch. 17 - An Excel file named DartTosses.xlsx has one...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Consider a process to prepare a metal for a certain application. There are five parameters that must be considered: temperature, quenching rate, cooling time, carbon content, CO₂ concentration. It is desired to determine which of these parameters has the most influence on the process. There are two levels for each parameter as shown below. Temperature (°C) Quenching Rate(°C/s) Cooling time (s) Carbon Content (wt% C) CO₂ Concentration (%) Eight experiments were defined as follows: Experiment Carbon Content (wt% C) 1 2 3 4 5 6 7 8 1) What size orthogonal array should be used for evaluation (assume noise is negligible)? 2) Generate the array with the level values (i.e. Level 1 and Level 2). 1 1 1 1 6 6 6 6 Quenching Rate (°C/s) 35 35 140 140 35 35 140 140 Four trials were run for the experiments defined above: Experiment 1 2 3 4 5 6 7 8 Level 1 760 35 1 1 5 T1 68.00 69.84 74.36 71.71 91.27 54.39 64.65 60.31 Cooling Time 1 1 300 300 300 300 1 1 T2 61.41 64.76 61.30 58.42 90.89 Level 2 900…arrow_forwardPartII Say you've deployed a robot that can can measure electric field due to specified charge at the specified location with good accuracy. And you got these results from the robot: Electric field due to q2 at point p1 is (-1667.0) i + (18340.0) j Electric field due to q3 at point p1 is (-2496.0) i + (–1628.0) j Electric field due to q1 at point p2 is (-6311.0) î + (2470.0) } Electric field due to q2 at point p2 is (-11585.0) î + (–6951.0) ĵ Electric field due to q3 at point p2 is (4657.0) î + (11310.0) } c) Find the net Electric field at pj .arrow_forwardCALCULATE THE FOLLOWING: We performed the experiment to measure MATERIAL 1 - BRASS the thermal conductivity of 2 materials (Brass & Steel) in the laboratory and measured the following tabulated values: Calculation for Brass Quantities Values Material 1- BRASS Calculated Power (Q') W (Diameter = 25mm) Area of cross section (A) m2 Power Difference in Temperature Temperature (°C) between two points (AT) °C Difference in distance between two points (Ax) m Q' 1 2 3 (W) Thermal conductivity of brass (kp) W/m°C 4 5 6 8 9. 14.65 79 77.4 76 50.1 46.5 42.4 36 34.5 33.6 MATERIAL 2 - STEEL Calculation for Steel Material 2 - STEEL %3D Quantities Values Calculated (Diameter = 25mm) %3D Power (Q') W Power Area of cross section (A) m2 Temperature (°C) Difference in Temperature between two points (AT) °C Q' 1 |(W) Difference in distance between two points (Ax) m 2 3 7 8 14.2 88.6 87.5 85 33.9 33.6 32.4 Thermal conductivity of steel (kg) W/m°Carrow_forward
- Two kinds of bacteria are found in a sample of tainted food. It is found that the population size of type 1, N1 and of type 2, N2 satisfy the equation dN/dt=-0.1/N1 dN/dt30.7/N2 N1 is equal to 1000 at time equal to zero, while N2 is equal to 30 at time equal to zero. Then the population sizes are equal N1 = N2 at what time? (4 decimal places)arrow_forwardThe population of a community is known to increase at a rate proportional to the number of people present at time t. If an initial population P, has doubled in 7 years, how long will it take to triple? (Round your answer to one decimal place.) yr How long will it take to quadruple? (Round your answer to one decimal place.) yr еВookarrow_forwardQUESTION 2 Thermocouples are devices used to measure temperature of a given sample or the surrounding medium. These devices feature a "bead", which has a spherical shape, and produces voltage upon change in temperature. For an engineering application at a pharmaceutical company, thermocouple devices are being tested for their responsiveness, i.e. how fast it can detect temperature changes in the environment (surrounding air). The engineers at this company have specified design constraints for an ideal thermocouple: it must detect temperature changes no later than 1.5 minute, and the reported temperature value must be reasonably correct: at most %3 difference between measured and actual temperature values is allowed. Four thermocouples from different vendors are being tested. Relevant properties of these devices are listed below: Thermal conductivity Density 36 W/m*K 36 W/m*K 42 W/m*K 33 W/m*K Specific Heat 140 kJ/kg*K 120 kJ/kg*K 150 kJ/kg*K 160 kJ/kg*K Device Bead Diameter…arrow_forward
- e ll 42% A 16:33 docs.google.com/forms 59 A musical note on a piano has a frequency of 31 Hz. If the tension in the 2-m string is 308 N, and one-half wavelength occupies the string, what is the mass of the wire? 0.031 kg 0.040 kg 0.047 kg 0.019 kg 0.024 kg A simple pendulum is set into motion at two different times with different initial conditions. The first time: the bob is in its equilibrium position andarrow_forwarda) Sydney tap-water has a fluid electrical conductivity (EC or σ) of approximately 210μS/cm. Express this in terms of Ohm metres (resistivity) and mS/m (conductivity). b) The fluid electrical conductivity (EC) was measured on a water sample first at 25 °C to 305 μS/cm, then later at 20 °C to 272 μS/cm. Assuming a linear relationship, calculate the EC at 10 and 30 °C. c) A 20 cm long cylinder with 10 cm diameter is filled with an undisturbed fully saturated sandstone core. A current (I) of 100 mA was passed through the cylinder and a voltage(V) of 10,700 V was measured. Calculate the resistance and the resistivity of the sample. d) If we further know that the porosity is 1%, can you estimate the fluid electrical conductivity?arrow_forwardThe rate of infections with respect to time t (measured in days) within a population is seen to be rising exponentially according to the relation: I = e(k–1)t (Infections per day) This occurs over a period of 20 days from time t = [0, 20], where k = 1.4. a) What is the period of time t required for the initial infection rate I(t = 0) to double in number? State answer to within 3 decimal places.arrow_forward
- As we explained in earlier chapters, the air resistance to the motion of a vehicle is something important that engineers investigate. The drag force acting on a car is determined experimentally by placing the car in a wind tunnel. The air speed inside the tunnel is changed, and the drag force acting on the car is measured. For a given car, the experimental data generally is represented by a single coefficient that is called drag coefficient. It is defined by the following relationship: F, where air resistance for a car that has a listed C, = drag coefficient (unitless) measured drag force (N) drag coefficient of 0.4 and width of 190 cm and height of 145 cm. Vary the air speed in the range of 15 m/sarrow_forwardAccording to Hooke's Law, we need to be measuring x (the length of the spring) however our CBR is set up to measure y( the height of the bottom of the mass). Create a diagram and explains why we can swap out x variables for y variables when conducting this experiment x yarrow_forwardQuestion 2 Study the table below and answer the questions that follow. Coercivity (kA/m) BH max (kJ/m³) Material Curie temperature (°C) A 19.90 8 887 В 0.08 0.04 771 C 1 500 175 723 238.85 28 429 2.2. a) On the same set of axes draw and clearly label the hysteresis loops for materials B and C. b) Explain any two features of the hysteresis loops you drew in (a). c) Suggest an application for material B. Justify your answer.arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
Recommended textbooks for you
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY
Elements Of Electromagnetics
Mechanical Engineering
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:9780134319650
Author:Russell C. Hibbeler
Publisher:PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:9781259822674
Author:Yunus A. Cengel Dr., Michael A. Boles
Publisher:McGraw-Hill Education
Control Systems Engineering
Mechanical Engineering
ISBN:9781118170519
Author:Norman S. Nise
Publisher:WILEY
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Cengage Learning
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:9781118807330
Author:James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:WILEY
Heat Transfer – Conduction, Convection and Radiation; Author: NG Science;https://www.youtube.com/watch?v=Me60Ti0E_rY;License: Standard youtube license