Study Guide for Chapter 16 - Sound

Sound Answer Section for the Study Guide

MULTIPLE CHOICE

	1.	ANS:	A

	2.	ANS:	D

	3.	ANS:	C

	4.	ANS:	D

	5.	ANS:	B

	6.	ANS:	A

	7.	ANS:	B

	8.	ANS:	B

	9.	ANS:	A

	10.	ANS:	D

	11.	ANS:	B

	12.	ANS:	D

	13.	ANS:	B

	14.	ANS:	A

	15.	ANS:	B

	16.	ANS:	A

	17.	ANS:	C

	18.	ANS:	B

	19.	ANS:	A

	20.	ANS:	C

	21.	ANS:	A

	22.	ANS:	D

	23.	ANS:	C

	24.	ANS:	D

	25.	ANS:	C

	26.	ANS:	B

	27.	ANS:	A

	28.	ANS:	A

	29.	ANS:	D

SHORT ANSWER

	30.	ANS:	
air at 0°C

	31.	ANS:	
steel

	32.	ANS:	
The speed of sound is more than four times faster in iron than in lead. Because sound travels more slowly in denser mediums and in mediums with a lower level of elasticity, lead is most likely denser and less elastic than iron.

	33.	ANS:	
At the lower temperature, the particles of the air tend to move more slowly and respond less readily to the energy of the sound wave, making the speed of sound in air lower at 0°C than at 20°C.

	34.	ANS:	
4,540 m/s

	35.	ANS:	
Rubber most likely conducts sound the fastest, followed by vinegar and then by helium. In general, sound travels faster in solids (rubber) than in liquids (vinegar), and faster in liquids than in gases (helium).

	36.	ANS:	
Sonar is being used to locate sunken objects and to determine the depth of the water.

	37.	ANS:	
on the ship above

	38.	ANS:	
ultrasonic

	39.	ANS:	
ultrasonic sound waves sent out from the ship

	40.	ANS:	
reflected ultrasonic sound waves

	41.	ANS:	
The time for the sound waves to reach the sunken ship is half the time for the round trip, or 1/2 ? 6 s = 3 s.
Distance = Speed ? Time = 1,520 m/s ? 3 s = 4,560 m