. (a) When a soft object rests on a softsurface, the net force on the object due to the surface is directly upward. (b) As the object rolls tothe left, the net force becomes unbalanced and tilts to the right. (c) The net force can be split intonormal and rolling resistance components. Although rolling resistance is not strictly a friction force, it behaves like friction from ananalysis standpoint: ● The force of rolling resistance (frr) is drawn on the FBD opposing the direction of motion of the vehicle at the surface (similar to how fk is drawn for a crate sliding on a surface). ● It is calculated by multiplying the normal force (N) by the coefficient of rolling resistance (μrr): frr = μrrN ● The coefficient of rolling
posed to the students werecollectively worth about 9% of their exam score and were presented to them as follows:Question 1. The force on a dropped apple when hitting the ground depends upon A) whether or not the apple bounces. B) the speed of the apple just before it hits. C) the time of contact with the ground. D) … all of the above. E) … none of the above.Question 2. As was demonstrated in class, if you throw a raw egg onto the floor, it will break. However, if you throw it with the same speed into a soft, sagging sheet, it won’t break. Carefully explain the significance of the sagging sheet in terms of keeping
using Fermi- Dirac statistics; identify and analyze current flow mechanisms in pn junction diodes, solar cells, and transistors. Students will analyze nanoscopic materials such as graphene and other interesting 2-dimensional materials.The course topics include: 1) Properties of Light 6) Crystal Properties a) Spectral Irradiance and Blackbody a) Hard Sphere Model and Density Radiation b) Crystal Lattices and Miller Notation b) Photoelectric Effect and the Photon 7) Quantum Theory of the Solid State Concept a) Energy-Band Theory 2) Nuclear Atom
Paper ID #26393A Tale of Two Rubrics: Realigning Genre Instruction through Improved Re-sponse Rubrics in a Writing-intensive Physics CourseJohn Yukio Yoritomo, University of Illinois, Urbana-Champaign John Yoritomo is a 6th year PhD candidate in the Physics Department at the University of Illinois Urbana- Champaign. His research focuses on diffuse field ultrasonics, with applications in non-destructive evalu- ation and seismology. He has been a teaching assistant for many writing-intensive undergraduate courses in the Physics Department. He is also a member of a team working to improve the writing instruction in the
(ITESM) Jorge de la Garza is a Lecturer of the Physics Department within the School of Engineering at the Tec- nologico de Monterrey, Monterrey, Mexico. He holds a bachelor degree in Physics Engineering and a doctoral degree in Education both from Tecnologico de Monterrey. Dr. de la Garza has been recognized by the government as a member of the Researchers’ National System in Mexico (SNI). He also actively participates in the different initiatives of the University mainly those related to interdisciplinary approach of teaching and learning, looking to close the gap between how knowledge is created and how students learn. His main research areas are a) models and modeling, b) learning environments and c) problem
increasingnonlinearity. The initial conditions are ϕ0 = 0 and ϕɺ0 = 0 in all plots, and a second plot isdepicted in each subplot with a modified initial amplitude φ0 ( ϕ0 = 10o for Figure 9 (a) and (b)and ϕ0 = 1o for Figure 9 (c), (d) and (e). In general, it can happen that small differences in theinitial conditions produce very great ones in the final phenomena. A small error in the formerwill produce an enormous error in the latter, so that the prediction of a real system’s behaviorbecomes impossible.Due to the fact that the phase portraits ϕɺ over ϕ represent the projection of the extendedphase space (with coordinates ϕ , ϕɺ , and t ), intersecting trajectories appear in subfigures (c) to(e).(a) µ ωn2 = 0 , ∆ϕ0 = 10o(b) µ ωn2 = 0.5 , ∆ϕ0 = 10o(c) µ ωn2 = 1
resource for college instructors,” 3rd Ed. San Francisco, CA, Jossey-Bass, 2012.[8] B. E. Walvoord, “Assessment clear and simple: A practical guide for college instructors,” 3rd Ed. San Francisco, CA, Jossey-Bass, 2012.[9] M. Lanzerotti, C. I. Allen, M. Doroski, C. Medve, M. Seery, L. Orlando, F. Khafizov, “An electrical engineering graduate course sequence in integrated circuits targeted to real-world problems in industry, defense, and security,” American Society for Engineering Education Annual Meeting, Paper ID#17791, Columbus, Ohio, June 25-28, 2017.[10] Richard M. Felder and Rebecca Brent, “Teaching and Learning in STEM: A Practical Guide,” New York: New York, Jossey-Bass, 2016. https://educationdesignsinc.com/book/[11] J
material response under electric field and permeability is the material responseunder magnetic field. Under the influence of external electric field, there occurs a polarization ofelectric charges in atomic level which give rise to permittivity. Under the influence of externalmagnetic field, there occurs a polarization of magnetic dipoles moments (in magnetic material)in atomic level which give rise to permeability. When tiny particles of particular shape, made ofmetal or dielectric material, are arranged in a regular fashion, is called artificial material. Infigure 1, an artificial material, composed of metallic wires or circular metal patches or metalspheres, is shown.Figure 1. Artificial material composed of (a) 1-D metal wires, (b) 2-D
test versus the four conceptual understanding measures. A) The second midterm test excepting the RC circuit problem. B) The RC circuit problem in the second midterm. C) 12 ECCE questions as post-test. d) The qualitative part of the RC circuit test.All of the graphs in figure 1 have the same general features. Most of the students fall in the areaunder the line, that is, in which the qualitative (conceptual) score is greater than the quantitativescore. However, it is clear that graphs c) and d) have more spread. This could be due to thenature of those instruments. Both of them are diagnostic with no penalization to students. On theother hand, graphs a) and b) are results from the midterm exam, which is part of the
electromagnet attached to the central speaker.The plywood frame also housed four smaller speakers which used permanent magnets. Thecreators of this speaker initially also had the idea that the current supplied by the audio signalfrom the phone would create a large enough force that the cardboard diaphragm would vibrate.They learned that the current supplied by the phone would not create a strong enough magneticfield to vibrate the cardboard diaphragm. This group solved their problem with the four smallerspeakers with plastic diaphragms. The speaker designs shown in Figures 2b and 2c exceededexpectations. (a) (b) (c)Figure 2: Photographs of student speakers. (a) Simplest
the lab.The pilot hole approach was adopted in Spring 2018 for Circuit Analysis course, and studentscompleted a survey at the end of the semester. The thirteen students enrolled in this course arefrom different degree programs: 1 CpE, 3 EE, 6 ME, 1 Physics, and 2 in the pre-engineeringprogram. There were three questions related to this new approach: (a) How often do you need touse the solution manual in completing homework assignments? (b) Is the exercise session helpfulin doing the homework assignments? (c) If there were no exercise sessions, would you becomemore dependent on the solution manual? For each question there were five options: (1) 0-20%,(2) 20-40%, (3) 40-60%, (4) 60-80%, (5) 80-100%. The results of percentage of students
particular relevant courses.References[1] ABET Engineering Accreditation Commission, Criteria for Accrediting EngineeringPrograms. Baltimore, MD: ABET, 2017. [E-book][2] National Research Council, Discipline Based Education Research. Washington D.C:National Academies Press, 2012. [E-book][3] D. Jonassen, “Engineers as Problem Solvers,” in Cambridge Handbook of EngineeringEducation Research, A. Johri and B. Olds, Eds. Cambridge: Cambridge University Press, 2014,pp. 103-118. [E-book][4] M. Chi, et al., “Categorization and representation of physics problems by experts andnovices,” Cognitive Science, vol. 5, issue 2, pp. 121–152, 1981.[5] C. Atman, et al., “Engineering Design Processes: A Comparison of Students and ExpertPractitioners,” Journal of
mechanics test data for introductory physics courses,” Am. J. Phys., vol. 66, no. 1, pp. 64–74, 1998.[10] F. J. Garcia-Peñalvo, H. Alarcon, and A. Dominguez, “Active learning experiences in engineering education,” Int. J. Engineering Educ., vol. 35, no. 1, pp. 305–309, 2019.[11] A. Garcia-Holgado, F. J. Garcia-Penalvo, and M. J. Rodriguez-Conde, “Pilot experience applying an active learning methodology in a software engineering classroom,” IEEE Glob. Eng. Educ. Conf. EDUCON, vol. 2018–April, pp. 940–947, 2018.[12] P. Haidet, R. O. Morgan, K. O’Malley, B. J. Moran, and B. F. Richards, “A controlled trial of active versus passive learning strategies in a large group setting,” Adv. Heal. Sci. Educ., vol. 9, no
was heard.The results confirm what is generally expected about ionospheric propagation. In looking at Figure4, observe the following. (a) the 2.5 and 5 MHz signals can only be heard at night indicating thatwhen the sun is out, the D-layer is present and absorbs signals on the lower part of the HF bandsand thus prevents them from reaching the E or F-layer for long distance transmission. Note thatthe sunset/sunrise in Colorado lags Connecticut by two hours as well as other considerations meansthat receiving these will not necessarily coincide with the exact local sunrise/sunset times. (b) The5 MHz signal is less subject to the D-layer than the 2.5 MHz signal and is thus heard for a longertime during the daylight hours. Therefore, we observe D
Paper ID #26661Introducing Programming and Problem Solving with Arduino-based Labo-ratoriesDr. Michael Daugherity, Abilene Christian University Dr. Michael Daugherity is an Associate Professor of Engineering and Physics at Abilene Christian Uni- versity in Abilene, Texas. He received his PhD in Nuclear Physics from the University of Texas at Austin. His primary research focuses on nuclear physics experiments at the Brookhaven National Lab and Fermi National Accelerator Lab atom smashers performing data analysis and building radiation detectors. In- cluding undergraduate students in research is a major emphasis at ACU’s
Paper ID #25051Impulse Calculation of Model Rocket Engines ¨Dr. Huseyin Sarper P.E., Old Dominion University H¨useyin Sarper, Ph.D., P.E. is a Master Lecturer with a joint appointment the Engineering Fundamentals Division and the Mechanical and Aerospace Engineering Department at Old Dominion University in Norfolk, Virginia. He was a professor of engineering and director of the graduate programs at Colorado State University – Pueblo in Pueblo, Col. until 2013. He was also an associate director of Colorado’s NASA Space Grant Consortium between 2007 and 2013. His degrees, all in industrial engineering, are from the
electricity in their daily life; therefore, it is crucial todevelop methods to produce energy from day-to-day doings. Considering our average daily use, the devicewas designed to harness energy from water flow using fundamental physics concepts. Hydroelectric poweris considered as one of the cleanest alternative energies but is still not widely and efficiently used by mostof today’s energy enterprises. This paper presents a water flow generator that produces electrical energyfrom the day-to-day water use at home. The flow generator design is a micro view of the hydroelectricpower plant combined with the idea of using rechargeable and energy storing devices. This will helpto generate electrical energy to support some of the devices used daily by
Paper ID #25103Integration of Physics Fundamentals to Prepare Students for the Hi-TechWorld through Design of Filters Deployable in Mobile CommunicationDr. Kanti Prasad, University of Massachusetts, Lowell Dr. Kanti Prasad is a professor in the department of electrical and computer Engineering and is found- ing Director of Microelectronics/VLSI Technology Laboratories at the University Massachusetts Lowell. Professor Prasad initiated the Microelectronics/ VLSI program in 1984, and is teaching 16.469/16.502 VLSI Design and 16.470/504 VLSI Fabrication courses since its inception. From the spring of 1986 Pro- fessor Prasad