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PHYS 2401.04: Physics Science & Engineer I

PHYS 2401.04: Physics Science & Engineer I. The Rules of the Universe Martha Casquete UTPA Lecturer. Einstein. Newton. Digression: Why are you here?!. “Because I was born.” “My parents made me come.” “My parents hate me.” “It’s just what you do after high school…”

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PHYS 2401.04: Physics Science & Engineer I

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  1. PHYS 2401.04: Physics Science & Engineer I The Rules of the Universe Martha Casquete UTPA Lecturer Einstein Newton

  2. Digression: Why are you here?! • “Because I was born.” • “My parents made me come.” • “My parents hate me.” • “It’s just what you do after high school…” • “I want to get a job, man” • “I’m here to learn—to think—to build my brain.” • College is an opportunity: do your best to seize it! • What I wish for each of you to come out with: • Ability to think critically (not afraid to think indep.) • Willingness to see complexity/multiple sides of issue

  3. About Me • BA and MS in Physics from the University of Texas at Brownsville (UTB) • Coordinator of Student Development for 8 years at UTB • Adjunct Faculty at UTB (for 6 years –until 2010) • High School Math Teacher at Donna School District (2010 - 2013) • Math Adjunct Faculty at Ashford University (Summer 2013 ) • Physics Lecturer at UTPA (Fall 2013)

  4. About Me I love traveling!! Grand Canyon -Spring 2013

  5. About Me • I love the outdoors: walking, bicycling and swimming. • Laguna Atascosa National Wildlife Refuge

  6. Course Objectives • Explore the approach that physics brings to bear on the world around us • Appreciate the influence physics has on us all • Begin to see physics in the world around you • Develop your natural intuition, stimulate curiosity • Think into the unknown (ooh that’s scary!) • Understand basic laws of physics • Newton’s laws of motion, gravitation (even relativity) • Concepts of mass, force, acceleration, energy, momentum, power, etc. • Work and energy • Temperature

  7. Course Objectives, continued 5. Enhance your scientific literacy • know the difference between science and the supernatural • feel encouraged to read popular science articles/books

  8. Course Structure Session: 04 • Full class meets 2 times per week in ARHU 253 • T & TH 5:45 – 7:00 PM • Lectures • PowerPoint presentations • Lecture materials & HW will be made available on the web (write it down) • http://marthacasqueteutpa.weebly.com • Demonstrations • Discussion • HW • Exams: 4 • Final

  9. Resources • Your Fellow Students! • Encouraged to work together on homework, exercises (but not on exams!) • Lecturer: Martha Casquete Office in SCNE building, Room 3.136, office hours T & TH 11:00–1:00 PM, or by appointment, 956.665.2171, casquetem@utpa.edu • Web: • marthacasqueteutpa.weebly.com • Text • Physics for Scientists and Engineers, 13th Edition by Serway and Jewett • used text to save you guys $$

  10. Expectations • Attend lectures and discussion section • Participate! • If it doesn’t make sense, ask! Everyone learns that way. • Don’t be bashful about answering questions posed. • In-class voting system should make this fun • Do the work: • It’s the only way this stuff will really sink in • exams become easier • Explore, think, ask, speculate, admire, enjoy! • Physics can be fun, enriching, beautiful

  11. Does it Pay to Come to Lecture? • No one who came more than 80% of time did very poorly • Few who came infrequently got more than a low B

  12. Grading

  13. Where can I find more info? Blackboard • http://marthacasqueteutpa.weebly.com

  14. Homework!! • You are expected to answer all the problems/questions. • Only one or two questions will be selected. • Questions and Observations -Investigation part of HW

  15. Class Participation and Attendance • All students are expected to prepare for and actively participate in class. I do not expect ‘perfect’ questions or answers. • Excellence means being prepared, involved, and taking responsibility for your own learning. • Every Monday/Tuesday you will turn In your Question /Observation

  16. What are these questions/observations? • Science is as much about questions as answers. • Every Monday/Tuesday, you’ll submit a question or observation about the physical world around you (related to the topics in the syllabus). • Something you’ve always wondered about • Something you recently noticed • Something that class prompted you to think about • I will choose one topic. You will research the topic and turn it in the following Monday. The topic will also be discussed in class. • Goal is to increase your awareness, observational skills • We’re immersed in physics: easy to ignore, but also easy to see! • You’ll begin to think more deeply before shoving problem aside • Allow your natural curiosity to come alive

  17. Questions/Observations, continued • What kind of question/observation? • Questions • How thunders happen? • Why does a car move? • How do cel phones work? • How do microwave ovens work? • Why is the sky blue? Why not purple? • Observations • I’ve noticed small rainbow patches in the sky way off to the sides of the sun on hazy winter days. What are those? • I’ve noticed that when I remove my shirt in the dark during a dry weather I see sparks coming out of the shirts. What’s up with that?!

  18. Let’s try it!! In a piece of paper write on the top left write the following information(for the HW you will do it in the index card): Date Name Course and session Question/observation: I have heard that if I rub a balloon against a fabric, it cling to the wall or any other place. Why is that possible?

  19. Let’s discuss it!! • You will have 2 minutes to discuss this subject with one or two of your classmates near you. • I will place music and when the music stop, you will return to your seats. • Then, you will have two minutes to sit down and write down your ideas Now, STAND UP and find a partner.

  20. What can you tell me? • Questions??

  21. Clickers • We will use infrared transmitters in every lecture • As a check on understanding • To give practice on quiz-like questions • Instant feedback (for me and for you) • Surveys/opinion gathering • Class Participation!!! • You will need to go to the Physics and Geology Department (PSB 1.118) to pick up your clicker. • You’ll register your clickers through blackboard site • Through blackboard you will sign in and click on this class. In the left side there is a tab that reads: clicker registration . Enter clicker’s number.

  22. Homework 1b • Instructions in weebly • Check out your clicker • Register in Blackboard • Bring the HW 1b to Instructor Casquete’s office (see her office hours) by Tuesday, September 3. • 20% reduction per day.

  23. Can I text or use my cel. phone during class?

  24. What will happen?

  25. Any Questions on Course Structure?

  26. QUIZ # 1 Date: Name: Major: Course and Session: In the paper provided by the instructor you will answer three questions from the following: 1) Where is Instructor Casquete’s office located? 2) Where do you need to pick up the clickers? 3) When is the question/observation due? 4) What will happen to you if you are found texting? 5) When do you need to submit the question/observation? 6) What percentage of your grade is the lab? 7) What percentage of your grade is participation?

  27. 1) Express the following numbers in scientific notation with three significant figures: • 0.0241 • 79,241 = 2.41 X 10-2 = 7.92 X 104

  28. 2) Solve 3x + 2 = 4x - 1 - 3x - 3x 2 = x - 1 + 1 + 1 3 = x 3(3) + 2 = 4(3) - 1 9 + 2 = 12 - 1 • Draw “the river” • Subtract 3x from both sides • Simplify • Add 1 to both sides • Simplify • Check your answer

  29. 3) Solve 8y - 9 = -3y + 2 + 3y + 3y 11y – 9 = 2 + 9 + 9 11y = 11 11 11 y = 1 8(1) - 9 = -3(1) + 2 • Draw “the river” • Add 3y to both sides • Simplify • Add 9 to both sides • Simplify • Divide both sides by 11 • Simplify • Check your answer

  30. Answer Now 4) What is the value of x if -7(x – 3) = -7? • 4 • -3 • -4 • 3

  31. Answer Now What is the value of x if 3(x + 4) = 2(x - 1)? • -14 • -13 • 13 • 14

  32. 5) Solve for x

  33. –bb2 – 4ac 2a x = THE QUADRATIC FORMULA The solutions of the quadratic equation ax2 + bx+ c = 0 are when a 0 and b2 – 4ac ≥ 0. You can read this formula as: x equals the opposite of b, plus or minus the square root of b squared minus 4ac, all divided by 2a.

  34. Finding the x-Intercepts of a Graph –( b) (b)2 – 4(a)(c) 2( a) x = 2+ 24 –2 x = 2 4 + 20 –2 2 24 –2 x = x = 2– 24 –2 x = 2 24 –2 x = SOLUTION The x-intercepts occur when y = 0. y= –x2 – 2x + 5 Write original equation. Substitute 0 for y, and identify a = 1, b = –2, and c = 5. 0 =–1x2 – 2x + 5 The equation has two solutions: Substitute values in the quadratic formula.  –3.45 Simplify. 1.45 Solutions

  35. Solve the following quadratic equation y= –x2 – 2 x + 5

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