Tutorial Questions 5 through 17

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Questions:
5. Ribbon on rope.
10. Travelling waves.
12. Sound wave
15. Transverse wave.
17. Impulsive or sinusoidal


Question 5. If I tie a very small ribbon on a rubber rope and an impulsive wave is sent down the rope from left to right, what will happen to the ribbon? See the figure.

In the figure, the ribbon is represented by a black dot. The pulse wave is on the left and will move to the right.

a) It will move with the medium motion.
b) It will travel down the rope from left to right.
c) It will not move.
d) It will move with the wave motion.
e) It will travel at the velocity of sound, 760 mph.

Fundamentals of Sound reference: Secs. 1-A, 1-C.

 

Question 10. Which of the moving string shapes below represent traveling waves

a) 1 only
b) 2 only
c) 3 only
d) 1 & 2
e) 2 & 3
f) 1, 2 & 3
g) none is a wave

Fundamentals of Sound reference: Sec. 1-A.

 

Question 12. The use of the term "sound wave" in air is meant to describe

a) the position of air molecules
b) the velocity of air molecules
c) oscillating pressure variations in air
d) the flow of energy through air

Fundamentals of Sound reference: Sec. 1-F.


Question 15. Which of the phenomena described below can be represented by a transverse wave?

I) Pulse wave on a string
II) Water wave
III) Wave made by fans in a stadium
IV) Sound wave

a) I
b) II
c) III
d) IV
e) I & II
f) III & IV
g) I, II, & III
h) I, II, III, & IV

Fundamentals of Sound reference: Sec. 1-A.

 

Question 17. Classify the following three waves as impulsive or sinusoidal:
1) The wave made by dropping a stone on a lake
2) A wave representing somebody's heartbeat on a TV monitor
3) The sound wave made by a tuning fork

a) All three waves are impulsive
b) All three waves are sinusoidal
c) Wave 1 is impulsive and waves 2 & 3 are sinusoidal
d) Wave 1 is impulsive, wave 3 is sinusoidal, and wave 2 is neither impulsive nor sinusoidal.

 

Fundamentals of Sound reference: Sec. 1-B.

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