Unit Schedules

Unit 2: Mechanical Model of Waves

 Day Monday, October 13 1 Focus Question(s): How does the position of a vibrating mass fluctuate with time? Does the period of a vibrating mass change over time? Does the amplitude of a vibrating mass change over time? How does increasing mass affect the period of its vibrations? Activities: Lab WM2 - Vibrating Mass Lab (40 minutes) Unit 1 Test (50 minutes) Homework:    Read Lesson 0a, 0b, and 0d of the Waves Chapter at The Physics Classroom Help:

 Day Wednesday, October 15 2 Focus Question(s): Where do we see waves? How are vibrations related to waves? What is a wave like? How would you describe it to a friend? What are the various categories of waves? and how can such wave types be distringuished from one another? What are the mathematical properties of waves? Activities: Post-lab Wiggles (WM1) and Vibrating Mass (WM2); review amplitude, period, and mass relationships; introduce inertia Discussion: Where do we see waves? Lecture: Vibrations to Waves - demos, 5 traits of all waves (Packet, p. 3) Simulations - particle motion vs. wave motion; wave categories (Packet, complete pp. 3-4) Properties of waves: period, frequency, wavelength, amplitude Student Wave Machine with volunteers (if time allows) Homework:    Read Lesson 1 of the Waves Chapter at The Physics ClassroomMOP - Waves Module - do WM1Complete Lab WM2 Help:

 Day Friday, October 17 -- Focus Question(s): What types of things does an engineer do? What considerations must an engineer have in order to create a high-quality, functional product? Activities: Special Guest - Dr. Mah ... speaking on engineering topics Homework:    Read Lesson 2 of the Waves Chapter at The Physics ClassroomMOP - Waves Module - do WM2 Help:

 Day Tuesday, October 21 3 Focus Question(s): What are the mathematical properties of waves?How can a standing wave pattern be used to represent a vibrating system and how can such a system be analyzed to determine the wavelength, amplitude, frequency, period and speed?What types of variables affect the speed of a wave? Activities: Mathematical modeling of waves: wavelength, amplitude, frequency, period, speed; Desmos; the wave equationDo pp. 5-6 of Packet; check with answer key Discuss/demonstrate standing waves; nodes and antinodes; drawing and analyzing patterns; packet, pp. 9-10Lab WM3 - Speed of a WaveSlinky Simulation (pp. 7-8) on Chromebooks Homework:    MOP - Waves Module - do WM2, WM3, WM7, WM8 Read Lesson 2 and Lesson 4c-4e of the Waves Chapter at The Physics ClassroomReturn E-book to bookstore Help:

 Day Thursday, October 23 4 Focus Question(s): What variables affect the speed of a wave? What are the characteristic behaviors of waves? How is a standing wave pattern formed?How can we use a standing wave model to analyze a vibrational pattern within a medium? Activities: Warm-up:  Wave Speed (packet, p. 11, Q#1-6)Practice with Wave Equation: p. 12, Q#7-10 Lecture demonstrations: free- and fixed-end reflection (p. 15, #1-2); boundary behavior (p. 16, #3-11); interference; Desmos modeling; Audacity demo; packet, pp. 13, #1-7; principle of superposition (pp. 13-14, #8-9) Standing Wave Mathematics Review - WebAssign Short Quiz on Waves Homework:    MOP - Waves Module - do WM5, WM6; to be collected next time WebAssign - if not finished, complete WebAssign from class Read Lesson 3a, 3c and study Lesson 4c-4e of the Waves Chapter at The Physics ClassroomReturn E-book to bookstore Help:

 Day Monday, October 27 5 Focus Question(s): What is a sound wave and how is it created? What variables affect the observable properties (pitch and loudness) of a sound wave? What variables affect the manner in which a sound wave is propagated?What is the relationship between the frequency and the nodal spacing distance for a longitudinal standing wave pattern?What is the deciBel scale? Activities: Collect MOP Codes (Waves) - chance 1 of 2 Lecture/demonstrations on Sound: mechanical, longitudinal, pressure wave that is created by vibrating object and propagated by particle-to-particle interaction; compressions, rarefactions, amplitude, frequency, speed (lots of 4-star demos) Packet - pp. 17-18 Introduce deciBel Scale with Reading Passage; discuss Sci Reasoning Lab WM4 - Vibrating Spring Lab - collect data/ begin analysis Homework:    Read Lesson 1 and  Lesson 2a-2b of the Sound Waves Chapter at The Physics ClassroomMOP - Sound and Music Module - do SM1, SM2 Return E-book to bookstore Help:

 Day Wednesday, October 29 6 Focus Question(s): How are the deciBel Scale and Intensity mathematically related? What is the inverse square law of radiation and how can it be used to predict the intensity of a wave at a given location? How can a standing wave model be used to analyze a vibrational pattern within a medium? In what way can resonance be used to amplify the vibration of an object or medium? Activities: Collect MOP Codes (Waves) - last chance Discuss deciBel scale (packet, p. 21); discuss I = P/(4•π•R2) equation (Q#4); discuss inverse square law (p. 22, Q#5-6) WebAssign: Practice w/dB equation and inverse square law Discuss natural frequency, forced vibration, resonance; 4-start demonstrations Lab WM4 - Vibrating Spring Lab - continue data analysis Homework:    Complete Lab WM4; notebooks to be collected on FridayRead Lesson 4 of the Sound Waves Chapter at The Physics ClassroomMOP - Sound and Music Module - do SM3, SM5Return E-book to bookstore Help:

 Day Friday, October 31 7 Focus Question(s): How can a standing wave model be used to analyze a vibrational pattern within a medium?In what way can resonance be used to amplify the vibration of an object or medium? Activities: Standing Waves in Strings: discuss v-f-wavelength-L-tension-m/L relationships; problem-solving schematic; packet, p. 23-24 Short QuizResonance Demos; reviewLab Test: Guitar String Collect lab notebooks Homework:    Read Lesson 5a-5b of the Sound Waves Chapter at The Physics ClassroomMOP - Sound and Music Module - do SM6WebAssign - Resonating Strings 1 Help:

 Day Tuesday, November 4 8 Focus Question(s): How can a standing wave model be used to analyze a vibrational pattern within a medium?In what way can resonance be used to amplify the vibration of an object or medium? Activities: Review Strings - Packet, pp. 29-30, #1-6 More resonance/music demonstrationsStanding Waves in Air Columns: discuss v-f-wavelength-L-T relationships; problem-solving schematic; packet, p. 27-28Lab WM6 - Closed End Air Columns Homework:    WebAssign - Resonating Strings 2Read Lesson 5d of the Sound Waves Chapter at The Physics ClassroomMOP - Sound and Music Module - do SM10 Help:

 Day Thursday, November 6 9 Focus Question(s): How can a standing wave model be used to analyze a vibrational pattern within a medium?In what way can resonance be used to amplify the vibration of an object or medium? Activities: Review Closed-End Air Columns; Packet, pp. 30+, Q#7-10 More resonance/music demonstrationsStanding Waves in Air Columns: discuss v-f-wavelength-L-T relationships; problem-solving schematic; packet, p. 25-26Lab WM7 - Open End Air ColumnsIntroduce Musical Instrument Project Homework:    WebAssign - Air Columns 1 Read Lesson 5c of the Sound Waves Chapter at The Physics ClassroomMOP - Sound and Music Module - do SM8 Help:

 Day Monday, November 10 10 Focus Question(s): How can a standing wave model be used to analyze a vibrational pattern within a medium?In what way can resonance be used to amplify the vibration of an object or medium? Activities: MOP Codes (Sound and Music) - 1st chance of 2 Review Open-End Air Columns; Packet, pp. 31+, Q#11-14More resonance/music demonstrationsMusical Instrument Project - brainstorming stage Discuss timbre; Desmos modeling of harmonic interference Lab W9 - Timbre Homework:    WebAssign - Air Columns 2 Musical Instrument Project - brainstorm/decide on an idea (or two) Help:

 Day Thursday, November 13 11 Focus Question(s): How can a standing wave model be used to analyze a vibrational pattern within a medium?In what way can resonance be used to amplify the vibration of an object or medium? Activities: MOP Codes (Sound and Music) - last chanceMusical Instrument Project - design stageDiscuss Helmholtz resonators Lab W8 - Pop Bottle Challenge Homework:    Project - develop instrument design Prepare for Unit 2 Test Help: The Review Session: Waves | Sound and Music

 Day Monday, November 17 12 Focus Question(s): To be announced Activities: Start Unit 3 - Kinematic Model of Motion Unit 2 Test Homework:    To be announced Help: To be announced

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