give answers for these 5 multiple choice questions When a wave pulse on a string
ID: 1590708 • Letter: G
Question
give answers for these 5 multiple choice questions
When a wave pulse on a string reflects from a hard boundary, how is the reflected pulse related to the incident pulse?
a)Shape unchanged, amplitude unchanged.
b)Shape inverted, amplitude unchanged.
c)Shape unchanged, amplitude reduced.
d)Shape inverted, amplitude reduced.
e)Amplitude unchanged, speed reduced.
There are some points on a standing wave that never move. What are these points called?
a)Harmonics.
b)Normal Modes.
c)Nodes.
d)Anti-nodes.
e)Interference.
Two sound waves of nearly equal frequencies are played simultaneously. What is the name of the acoustic phenomena you hear if you listen to these two waves?
A. Beats.
B. Diffraction.
C. Harmonics.
D. Chords.
E. Interference.
The various possible standing waves on a string are called the
A. Antinodes.
B. Resonant nodes.
C. Normalmodes.
D. Incidentwaves.
The frequency of the third harmonic of a string is
a)One-third the frequency of the fundamental.
b)Equal to the frequency of the fundamental.
c)Three times the frequency of the fundamental.
d)Nine times the frequency of the fundamental.
Explanation / Answer
(1) b)Shape inverted, amplitude unchanged.
(2) c)Nodes
(3) A. Beats.
(4) C. Normalmodes
(5)c)Three times the frequency of the fundamental.
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