http://www.ck12.org Chapter 12. Waves and Energy Transfer
MEDIA
Click image to the left for use the URL below.
URL: http://www.ck12.org/flx/render/embeddedobject/70771- In your own words, how are compressions and rarefactions produced by the tuning fork?
- Make a guess why sound can easily travel around corners (Hint: think of its medium).
Review
Questions
- Some giant ocean waves have a wavelength of 25 m long, and travel at speeds of 6.5 m/s. Determine the
frequency and period of such a wave. - Bats use sound echoes to navigate and hunt. They emit pulses of high frequency sound waves which reflect
off obstacles in the surroundings. By detecting the time delay between the emission and return of a pulse, a
bat can determine the location of the object. What is the time delay between the sending and return of a pulse
from an object located 12.5 m away? The approximate speed of sound is 340 m/s. - Sachi is listening to her favorite radio station which broadcasts radio signals with a frequency of 1. 023 ×
108 Hz. If the speed of the signals in air is 2. 997 × 108 m/s, what is the wavelength of these radio signals? - A longitudinal wave is observed to be moving along a slinky. Adjacent crests are 2.4 m apart. Exactly 6
crests are observed to move past a given point in 9.1 s. Determine the wavelength, frequency, and speed of
this wave. - A sonar signal leaves a submarine, travels through the water to another submarine and reflects back to the
original submarine in 4.00 s. If the frequency of the signal was 512 cycles per second and the wavelength of
the signal was 2.93 m, how far away is the second submarine?
- longitudinal wave:A wave in which the direction of media displacement is the same as the direction of wave
propagation.