Chapter 11.3-11.4

1. Chapter 11.3-11.4 Section Reviews

2. 11.3 Properties of Waves • 1. The disturbance is transmitted through the water (medium) as wave energy. • 4. If the amplitude increases by a factor of four, then the energy increases by 16 times. See wave speed problems solution from page 387 for answers to questions 2, 3 and 5

3. 11.4 Wave Interactions • 1. The largest resultant displacement for two waves of .2 and .3 m is 0.50 m. • 2. If ends are fixed, the maximum amplitude for these two waves is 0.0 m because the pulse will invert when reflected. This is an example of destructive interference. • 3. If ends were free, the maximum amplitude for these two waves is 0.30 m because the pulse will reflect but will not invert. This is an example of constructive interference. • 4. Three wavelengths produced on a fixed string 2.0 m long are 4 m (2L), 2 m (L) and 1.3 (2/3 L) • 5. 4 nodes, 3 antinodes

4. Transverse Waves • A wave in which the particles move perpendicular to the direction the wave is traveling • The displacement-position graph below shows the wavelength () and amplitude (A).

5. Longitudinal Wave Chapter 11 Section 3 Properties of Waves