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BYU - PHY S 100 - Class Notes - Week 6

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BYU - PHY S 100 - Class Notes - Week 6

School: Brigham Young University
Department: OTHER
Course: Physical Science
Professor: Patricia Ackroyd
Term: Spring 2017
Tags: waves and doppler
Name: Chapter 10 Notes, Week 5
Description: Waves (transverse/shear and longitude/compression), wave properties, Doppler Effect
Uploaded: 10/13/2017
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background image Chapter 10: Waves Mechanical waves: waves that transfer energy by moving through matter Waves travel through something tangible, a material or "medium" Once wave travels through, medium returns to equilibrium state through  internal forces and gravity o Without attempts to return to equilibrium, waves wouldn't exist   Types of Waves   Transverse/Shear Molecules of medium travel at right angle to wave o Medium moves up and down while waves travels outward Shear waves do not travel inside fluids, only through solids o Rippling waves on the surface of water have shear motion, but not  under the water   Longitude/Compression   Molecules of medium moves in the same direction as the wave Travels through solids, liquids, and gases Molecules resist being compressed, creates restoring force that returns  molecules to equilibrium Sound waves  
 
  https://www.bing.com/images/search?view=detailV2&ccid=ob11Q2bU&id=358643F1F51B6BF7C2F693AAE6616B3C5990177D&thid=OIP.ob11Q2bU-sAhdio4cr5F4wEsCp&q=compression+wave&simid=607997354588176885&selectedIndex=6&ajaxhist=0  
 
 
 
background image Wave Properties Amplitude: maximum displacement from equilibrium position The greater the amplitude, the more energetic the wave   Wavelength: distance from one trough to the next trough (or another repeating part 
of wave)
Explains color: red is longer, violet is shorter Explains pitch: low tones are longer wavelengths than high tones  
Frequency: how many crests passing a certain point every second 
The "rate" of the wave Measured in hertz   * Wavelengths and frequency have an inverse relationship (bigger/higher  wavelength = shorter/lower frequency) * Wave speed: how well wave travels through material/medium Depends on medium's elasticity, density, and type of wave passing through it Wave speed = frequency * wavelength     From < %2fDFQUc&id=DD58DA413C507866909A0585893A45F055795D46&thid=OIP.Oy_DFQUc5yh6ZWafKJlTfQEsBh&q=wave+properties&simid=608007301753342735&selectedIndex=42&mode=overlay >   
 
 
Wave Phenomena   
Reflection: wave bounces off a surface (change in density)
Explains acoustics of an auditorium or concert hall  
Refraction: changing direction when traveling from one medium to another
Wave speed often changes, and so wave direction changes too

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School: Brigham Young University
Department: OTHER
Course: Physical Science
Professor: Patricia Ackroyd
Term: Spring 2017
Tags: waves and doppler
Name: Chapter 10 Notes, Week 5
Description: Waves (transverse/shear and longitude/compression), wave properties, Doppler Effect
Uploaded: 10/13/2017
4 Pages 28 Views 22 Unlocks
  • Better Grades Guarantee
  • 24/7 Homework help
  • Notes, Study Guides, Flashcards + More!
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