2.  The of an object that is made to vibrate by that is  a tuning fork   the sound through vibrations  a guitar

3.  Objects vibrate differently  Object made of  when, vibrates at   depends on factors   Minimum is required to  Requires least amount of to continue

4.  The frequency of a on an object matches the  Needs back to its starting position &  Successive push increases  i.e. a swing

5.  Two objects that have the same  The vibration of one object can  Resonance causes of

6.  Not restricted to  Occurs whenever are applied to a in rhythm w/its  i.e. troops marching across a footbridge

7.  Constructive:  Destructive:  FOR SOUND:  Constructive:  Destructive:

8.  Affects of sounds  If sit from two speakers, interference (makes sound louder)  If sit to one speaker, interference (makes sound softer)  Destructive interference of  BUT, can occur  Sound waves reflected off walls to form zones of

9.  Useful in technology  Loud devices (i.e. jackhammer) are paired with devices that (i.e. earphones)  Sound compressions are

10.  Periodic variation in the  Two slightly mismatched (or other instrument)  One fork vibrates @ a freq. diff from the other  Vibrations of forks in and out of step  Maximum =  Minimum =

11.  If a fork vibrates and another, they are twice each second   beat frequency = 2 Hz  Beats can occur with  When tuning instruments, if frequencies are identical,

12.  P402-403  TE #2, 3, 8, 9, 12  TS#1, 2