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Chapter 5, Section 2. Making Waves. February 17, 2012 HW: PTG #1, 2, 5-8, pg. 505-506, Due Next Wednesday/Thursday. Learning Objective: Describe how waves carry energy Describe how wavelength, frequency and speed of a wave are related Success Criteria: Observe the motion of a pulse

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Chapter 5 section 2

Chapter 5, Section 2

Making Waves


February 17 2012 hw ptg 1 2 5 8 pg 505 506 due next wednesday thursday
February 17, 2012HW: PTG #1, 2, 5-8, pg. 505-506, Due Next Wednesday/Thursday

  • Learning Objective:

    • Describe how waves carry energy

    • Describe how wavelength, frequency and speed of a wave are related

  • Success Criteria:

    • Observe the motion of a pulse

    • Calculate the speed of a wave pulse

    • Observe standing waves

    • Investigate the relationship among wave speed, wavelength, and frequency

    • Make a model of wave motion

    • Distinguish between transverse and longitudinal waves

  • Do Now:

    • Write LO and SC on a new left-side page

    • WDYS/WDYT pg. 492


Investigate part a
Investigate: Part A

  • Stadium Wave

  • Standing Wave

  • #1-Answer a-d in your notebook


Do now
Do Now

  • Draw a wave

  • Label as many parts as you can of the wave.

  • Read page 494 #4, 5, 6, 7


Part a big idea
Part A Big Idea?

  • Wave moves, but people move up and down

  • Waves are produced by adjacent particles move up and down, causing the wave to move across.


Investigate part b
Investigate: Part B

  • Transverse Waves

  • Demo #1-2 (answer questions) demo 3-4 answer question

  • You are writing in your notebook

  • #6-7-in groups

  • #7-choose amplitude as a class

    • Prediction: How do you think amplitude will affect the speed of the wave?

    • Groups 1-2, 3-4, 5-6 different amplitudes


Exit ticket
Exit ticket

  • ON a half sheet of paper…

  • Describe how waves carry energy using the following sentence structure about how waves carry energy.

    • As particles move___________, the wave moves___________.


February 23 2012
February 23, 2012

  • Learning Objective:

    • Describe how waves carry energy

    • Describe how wavelength, frequency and speed of a wave are related

  • Success Criteria:

    • Observe the motion of a pulse

    • Calculate the speed of a wave pulse

    • Observe standing waves

    • Investigate the relationship among wave speed, wavelength, and frequency

    • Make a model of wave motion

    • Distinguish between transverse and longitudinal waves

  • Do Now:

    • Read procedures #10-15

    • Pg. 496-497

    • Create data table


  • #10-13 Demo then in groups

  • #14-Demo, discuss energy

  • #15-groups, discuss

    • A transverse pulse is one in which the motion of the wave is perpendicular (90 degrees) to the motion of the particles of the medium

    • As the amplitude of a transverse pulse on a spring increases, its speed remains the same

    • As the frequency of a standing wave increases, the wavelength decreases and the wave velocity remains the same.


February 22 2012 hw ptg 1 2 5 8 pg 505 506 due wed bring tissues
February 22, 2012HW: PTG #1, 2, 5-8, pg. 505-506, Due Wed, Bring Tissues

  • Learning Objective:

    • Describe how waves carry energy

    • Describe how wavelength, frequency and speed of a wave are related

  • Success Criteria:

    • Observe the motion of a pulse

    • Calculate the speed of a wave pulse

    • Observe standing waves

    • Investigate the relationship among wave speed, wavelength, and frequency

    • Make a model of wave motion

    • Distinguish between transverse and longitudinal waves

  • Do Now:

    • LO and SC reflection

      • Go through what we have covered so far and write page #s next to each item

      • How do you know you have met this success criteria or learning objective? On left side page


Part b big ideas
Part B Big Ideas

  • Speed of a wave=distance/time

  • Speed=frequency x wavelength

  • Frequency=#times the wave moves up and down each second

  • Energy travels in waves

  • Transverse Wave:

  • Standing Wave:


Investigate part c
Investigate: Part C

  • Longitudinal Waves

  • Complete all sections, OK with teacher


Part c big ideas
Part C Big Ideas

  • Compressional/Longitudinal Waves


Physics talk
Physics Talk

  • Waves Transfer Energy

  • Example

  • A wave transfers energy with no transfer of mass

  • When you throw a ball the mass and kinetic energy move from one place to another

  • A wave transfers only energy, no mass is moving.


Physics talk1
Physics Talk

  • How is energy transferred?

  • Chemical energy in musclesmechanical energy in armkinetic energy in spring

  • Energy transferred from one form to another, but TOTAL energy remains the same…Conservation of Energy!


Physics talk2
Physics Talk

  • How do waves “add”?

  • They continue to travel as though the other wave never existed.

  • http://www.youtube.com/watch?v=Xqo6sEt1cUE


Physics talk3
Physics Talk

  • Periodic Wave

  • Crest

  • Trough

  • Amplitude

  • Repetitive series of pulses

  • Highest point on a periodic wave

  • Lowest point on a periodic wave

  • Height of crest or depth of trough


Physics talk4
Physics Talk

  • How does amplitude relate to sound?

  • How does amplitude relate to energy?

  • Large amplitudeLoud sound!

  • Small amplitudesoft sound

  • Large amplitudeLarge amount of energy

  • Small amplitudesmall amount of energy


  • Distance between two consecutive crests or troughs

  • Symbol is λ (pronounce lambda)

  • Number of waves per unit time

  • Usually waves/sec called hertz (Hz)


Physics talk5
Physics Talk

  • Period (T)

  • Time required to complete one complete wave (crest-trough-crest)

  • Period and frequency are inversely proportionate

  • T=1/f

  • f=1/T


Physics talk6
Physics Talk

  • Transverse Waves

  • Compressional (Longitudinal) Wave

  • The medium moves perpendicular to the direction of the wave

  • The medium moves parallel to the direction of the wave

  • http://www.youtube.com/watch?v=MoVz2ENJb8M


Physics talk7
Physics Talk

  • Standing Wave

  • Wave pattern that remains in a constant position.

  • Does not go right/left, but does go up/down.

  • http://www.youtube.com/watch?v=03cUrkjqdE0


  • Place on a standing wave that is motionless

  • Point on a standing wave where the displacement (movement) is greatest


  • Compression Wave

  • Air molecules get compressed and move through the air


  • Speed=Distance/Time

  • Wave speed=wave frequency x wavelength

    v=fλ

    Sample problems on pg. 502


  • Learning Objective:

    • Describe how waves carry energy

    • Describe how wavelength, frequency and speed of a wave are related

  • Success Criteria:

    • Observe the motion of a pulse

    • Calculate the speed of a wave pulse

    • Observe standing waves

    • Investigate the relationship among wave speed, wavelength, and frequency

    • Make a model of wave motion

    • Distinguish between transverse and longitudinal waves

  • Do Now:

    • Finish LO and SC reflection

      • Go through what we have covered so far and write page #s next to each item

      • How do you know you have met this success criteria or learning objective? On left side page

    • Essential Questions Pg. 504

      • What does it mean?

      • How do you know?

      • Why should you care?


Essential questions
Essential Questions

  • Pg. 504

    • What does it mean?

    • How do you know?

    • Why should you care?




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