Uniform motion is any motion at constant speed.
Indicate whether the statement is true or false
[Ques. 2] What is a beat in terms of the physics of sound?
a. The rhythm of a drummer.
b. A repeated sound pulse through a vibrating system.
c. The sound of a metronome used to help play the instrument at a steady pace.
d. A periodic variation in volume caused by superimposing sounds of two similar frequencies.
e. A single sound pulse through a vibrating system.
[Ques. 3] Motion in a circle at constant speed is motion with constant velocity.
Indicate whether the statement is true or false
[Ques. 4] Which is true of all percussion instrument sounds?
a. They include sounds from metallic bells, triangles, and cymbals, but not drums.
b. The higher frequencies that contribute are not whole-number multiples of the lowest frequency.
c. The higher frequencies that contribute are always whole-number multiples of the lowest frequency.
d. The frequencies that contribute can be, but do not have to be, whole-number multiples of the lowest frequency.
e. They are all structured the same way that string and wind instrument sounds are structured.
[Ques. 5] Motion in a circle at constant speed is motion with constant acceleration.
Indicate whether the statement is true or false
[Ques. 6] Graphs of the first four standing waves in a closed organ pipe are shown in this figure. If the organ pipe were closed at both ends, how would the pattern of harmonics differ from the situation depicted in the figure?
a. All the harmonics occur when the organ pipe is closed at both ends.
b. The same occurs as shown in the figure, i.e., the even harmonics are missing.
c. The same occurs as shown in the figure, i.e., the odd harmonics are missing.
[Ques. 7] Speed can sometimes be negative.
Indicate whether the statement is true or false
[Ques. 8] The decibel scale is:
a. linear: Three decibels minus two decibels equals one decibel.
b. proportional: Three decibels is the square of two decibels, and four decibels is the square of three decibels.
c. logarithmic: Two decibels is ten times one decibel; three decibels is ten times two decibels.
d. inverse: A two decibel sound is half as loud as a one decibel sound.
e. logarithmic by tens: Ten decibels is ten times one decibel; twenty decibels is one hundred times ten decibels.
[Ques. 9] A vector quantity has only a magnitude and no direction associated with it.
Indicate whether the statement is true or false
[Ques. 10] A stringed instrument has a node at each end of the string, while a wind instrument:
a. has an antinode at the open end and a node at the closed end.
b. has a node at the open end and an antinode at the closed end.
c. has antinodes at both ends of the column of air.
d. has no nodes or antinodes at all.
e. has a node at each end of the column of air, similar to a stringed instrument.
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