Page 1639 - College Physics For AP Courses
P. 1639
Answer Key 1627
(b)
3
(e)
5
(c)
7
Answers vary. Students could include a sketch showing an increased amplitude when two waves occupy the same location. Students could also cite conceptual evidence such as sound waves passing through each other.
9
(d)
11
(c)
13
(a)
15
(c)
17
(b)
18
Striking the end of a protruding ruler would create transverse waves, not sound waves. Any measurable, audible sound would come from the repetitive striking of the ruler against the desk. The student is confused about the speed of sound through solids versus the speed of sound in air.
19
(a), (b)
21
(c)
Chapter 18
Problems & Exercises
1
(a) (b)
3
-600 C
5
7
9
15
(a)
(b) (c) one charge of
17
(a) 0.252 N to the left
(b)
19
(a)The electric field at the center of the square will be straight up, since and are positive and and are negative and all have the same magnitude.
(b)
