Question: If I triple the mass per unit length of a guitar string, its natural frequency changes by what factor? (0.58)

Answer Options:
0.33
0.5
0.58
0.75

Answer: 0.58

Question: The lower A on a piano has a frequency of 27.5 Hz. If the tension in the 2.0-m-long string is 304 N and one-half wavelength occupies the string, what is the mass of the string? (50 g)

Answer Options:
40 g
45 g
50 g
55 g

Answer: 50 g

Question: If a guitar string has a fundamental frequency of 500 Hz, what is the frequency of its second overtone? (1 500 Hz)

Answer Options:
1 000 Hz
1 500 Hz
2 000 Hz
2 500 Hz

Answer: 1 500 Hz

Question: A child sits on a swing supported by ropes of length 3.0 m. With what frequency will she need to apply the driving force to maintain swinging? (0.29 Hz)

Answer Options:
0.20 Hz
0.25 Hz
0.29 Hz
0.35 Hz

Answer: 0.29 Hz

Question: A tuning fork is sounded above a resonating tube (one end closed), which resonates at a length of 0.20 m and again at 0.60 m. If the tube length were extended further, at what point will the tuning fork again create a resonance condition? (1.0 m)

Answer Options:
0.8 m
1.0 m
1.2 m
1.4 m

Answer: 1.0 m

Question: A flute behaves like a tube open at both ends. If its length is 65.3 cm, and the speed of sound is 340 m/s, what is its fundamental frequency in Hz? (260 Hz)

Answer Options:
250 Hz
255 Hz
260 Hz
265 Hz

Answer: 260 Hz

Question: Two tuning forks sounding together result in a beat frequency of 3 Hz. If the frequency of one of the forks is 256 Hz, what is the frequency of the other? (259 Hz or 253 Hz)

Answer Options:
253 Hz
256 Hz
259 Hz
261 Hz

Answer: 259 Hz or 253 Hz

Question: For a standing wave in an air column in a pipe that is open at both ends, what are the least amount of nodes and antinodes in the pipe? (two antinodes and one node)

Answer Options:
Two nodes and one antinode
One node and one antinode
One node and two antinodes
Two antinodes and one node

Answer: Two antinodes and one node

Question: An airplane flying with a constant speed flies from a warm air mass into a cold air mass. The Mach number will increase, decrease, or stay the same? (increase)

Answer Options:
Increase
Decrease
Stay the same

Answer: Increase

Question: A C note (𝑓=256Hzf=256 Hz) is sounded on a piano. If the length of the piano wire is 1.00 m and its mass density is 2.50 g/m, what is the tension in the wire? (655 N)

Answer Options:
600 N
655 N
700 N
750 N

Answer: 655 N