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Chapter 8 - Waves - 5
1.
The elastic modules E at constant temperature is
a) ΔP x V / ΔV
b) V
t
= V
o
+ 0.61t
c) 333 ms
-1
d) (y
1
+ y
2
)
2.
The speed of sound in hydrogen is 4 times
a) Its speed in oxygen
b) Will produce beats
c) Electromagnetic waves
d) Crests and troughs
3.
The speed of sound in air at 0
o
C is
a) ΔP x V / ΔV
b) None of them
c) 333 ms
-1
d) V
t
= V
o
+ 0.61t
4.
If two waves of displacement y
1
, and y
2
superimpose then resultant displacement is
a) 333 ms
-1
b) None of them
c) ΔP x V / ΔV
d) (y
1
+ y
2
)
5.
Two waves of slightly different frequencies and traveling in the same direction
a) Crests and troughs
b) Electromagnetic waves
c) Crest
d) Will produce beats
6.
When a wave is reflected from a rarer medium crest is reflected as
a) Crest
b) Its speed in oxygen
c) Will produce beats
d) Crests and troughs
7.
The fundamental frequency of a stationery wave
a) f
1
= 1 / 2 L √ F/m
b) 333 ms
-1
c) (y
1
+ y
2
)
d) ΔP x V / ΔV
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