TUTORIAL QUESTIONS 45-55
Questions:
45) Rectangular Pulses.
50) Wave Terminology.
55) Physical phenomena.
45. Consider the two "rectangular" pulses below moving in opposite directions on a string at a propagation speed (i.e., wave velocity) of 1/2 ft/s. What does the string look like 5 seconds afterward?
Fundamentals of Sound
reference: Secs. 1-C, 1-K.
50. For sinusoidal waves, match the term with its appropriate definition:
a)
Wavelength (Symbol 
)
b) Cycle
c) Period (Symbol T)
d) Frequency (Symbol f)
e) Amplitude (Symbol A)
f) Displacement
1)
Time it takes a point in the medium to make one complete round trip.
(a),
(b), (c),
(d), (e),
(f).
2) The number of complete round trips that a point
in the medium makes
in one second.
(a),
(b), (c),
(d), (e),
(f).
3) Maximum distance that a point in the medium
moves away from
equilibrium during a
cycle.
(a),
(b), (c),
(d), (e),
(f).
4) Distance between two adjacent crests in the
wave.
(a),
(b), (c),
(d), (e),
(f).
5) One complete round trip of a point in the medium.
(a),
(b), (c),
(d), (e),
(f).
6) Distance that a point in the medium has moved
from equilibrium.
(a),
(b), (c),
(d), (e),
(f).
Fundamentals of Sound
reference: Sec. 1-G.
55. Can the concept of a wave be used to describe the following physical phenomena?
i) a swinging pendulum
ii) a mass oscillating at the end of a spring
a)
i only
b) ii only
c) both i and ii
d) neither i nor ii
Fundamentals of Sound reference: Sec. 1-E.