Ch. 5
Applying the Concepts

<See the back of the chapter.>

Questions for Thought
 
 1.	A wave is a disturbance that moves through a medium such as a solid or the air.

 2. 	No, because there is no force acting on the air to return it to its original position after the wave has dislocated it.

 4. 	There is no medium such as air to transmit sound on the moon.

 5. 	The condition where the frequency of an external force matches the frequency of an object is resonance.

 6. 	Gas molecules have a greater kinetic energy and move faster in warm air than in cold air. These molecules are able to transfer an impulse from one molecule to the next faster.

10. 	The sonic boom is from the building up of a pressure wave in front of the moving aircraft.  Since this pressure wave is present as long as the plane is moving faster than the speed of sound, the aircraft continually makes a sonic boom.

11. 	An echo is the return of a sound wave to its source after the wave has been reflected.

12. 	They all produce standing waves or resonance in whatever is oscillating.

Parallel Exercises

B1.	343m/s

B2.	334.0m/s

B3.	(a) 5.0s (b) .20Hz

B6.	1.68km

B7.	4.6s

<Attached Questions>

 1. 	T
 2. 	F
 3. 	F
 4. 	T
 5. 	F
 6. 	T
 7. 	F
 8. 	T
 9. 	F
10. 	F
11. 	d
12. 	d
13. 	d
14. 	b
15. 	b
19. 	a
20. 	b
21. 	c
22.  a
23. 	d
24.  b
25.  d