CK-12 Physical Science - For Middle School

19.2. Measuring Waves http://www.ck12.org Frequency= Speed Wavelength or Wavelength= Speed Frequency Therefore, if you know the ...

http://www.ck12.org Chapter 19. Waves Lesson Review Questions Recall How is wave amplitude measured in a transverse wave? Descr ...

19.3. Wave Interactions and Interference http://www.ck12.org 19.3 Wave Interactions and Interference Lesson Objectives Describe ...

http://www.ck12.org Chapter 19. Waves FIGURE 19.14 This man is sending sound waves toward a rock wall so he can hear an echo. FI ...

19.3. Wave Interactions and Interference http://www.ck12.org FIGURE 19.16 Waves strike a wall at an angle, called the angle of i ...

http://www.ck12.org Chapter 19. Waves FIGURE 19.18 The person can hear the radio around the corner of the building because of th ...

19.3. Wave Interactions and Interference http://www.ck12.org FIGURE 19.20 Constructive interference increases wave amplitude. De ...

http://www.ck12.org Chapter 19. Waves Lesson Summary Reflection occurs when waves bounce back from a barrier they cannot pass t ...

19.4. References http://www.ck12.org 19.4 References Tim Fields. http://www.flickr.com/photos/24327829@N04/6737005997/. CC BY 2 ...

http://www.ck12.org Chapter 20. Sound CHAPTER 20 Sound Chapter Outline 20.1 Characteristics of Sound 20.2 HEARINGSOUND 20.3 USIN ...

20.1. Characteristics of Sound http://www.ck12.org 20.1 Characteristics of Sound Lesson Objectives Describe sound waves. Identi ...

http://www.ck12.org Chapter 20. Sound FIGURE 20.1 This tree cracked and fell to the ground in a storm. Can you imagine what it s ...

20.1. Characteristics of Sound http://www.ck12.org Sound and Matter Sound waves are mechanical waves, so they can travel only th ...

http://www.ck12.org Chapter 20. Sound The speed of sound also depends on the temperature of the medium. For a given medium such ...

20.1. Characteristics of Sound http://www.ck12.org FIGURE 20.3 High-decibel sounds can damage the ears and cause loss of hearing ...

http://www.ck12.org Chapter 20. Sound fixed point in a given amount of time. High-pitched sounds, like the sounds of a piccolo, ...

20.1. Characteristics of Sound http://www.ck12.org As the car approaches the person on the right (position B), the sound waves g ...

http://www.ck12.org Chapter 20. Sound Lesson Review Questions Recall How is sound defined in physics? Identify two factors that ...

20.2. Hearing Sound http://www.ck12.org 20.2 Hearing Sound Lesson Objectives Explain how we hear sound. Relate loud sounds to h ...

http://www.ck12.org Chapter 20. Sound FIGURE 20.7 The three main parts of the ear have different functions in hearing. The eard ...