Phys 165 Module 8 Exam Qs & Ans to Pass
the Exam (), 100% Verified
PHYS 165 - Module 8 Exam: Oscillations, Waves, & Sound
• Instructions: Choose the single best answer for each question. You have 60 minutes to
complete this exam.
• 1. A mass-spring system oscillates with a period T. If the mass is doubled and the
spring constant is halved, what is the new period?
A) T/2
B) T
C) 2T
D) 4T
• 2. The frequency of a simple pendulum depends on which of the following?
A) Mass of the bob
B) Amplitude of the swing (for small angles)
C) Length of the pendulum
D) The density of the bob material
• 3. A wave on a string is described by the equation y(x, t) = 0.05 sin(4x - 20t), where
x and y are in meters and t is in seconds. What is the speed of the wave?
A) 5 m/s
B) 16 m/s
C) 80 m/s
D) 0.2 m/s
• 4. In a transverse wave, the particles of the medium move:
A) In the same direction as the wave propagation.
B) Perpendicular to the direction of wave propagation.
C) In circles.
D) Randomly without any net direction.
• 5. What is the phase difference between two points that are exactly one full
wavelength apart on a traveling wave?
A) 0 radians
B) π/2 radians
C) π radians
D) 2π radians
, • 6. The speed of sound in air is approximately 343 m/s. If a sound wave has a
frequency of 686 Hz, what is its wavelength?
A) 0.5 m
B) 2.0 m
C) 343 m
D) 235,298 m
• 7. Two sound waves with frequencies of 440 Hz and 444 Hz are played
simultaneously. How many beats per second will be heard?
A) 2 Hz
B) 4 Hz
C) 442 Hz
D) 884 Hz
• 8. Standing waves are created by the interference of:
A) Two waves of different frequencies traveling in the same direction.
B) Two waves of the same frequency and amplitude traveling in opposite directions.
C) Two waves of different amplitudes traveling in opposite directions.
D) Refraction at a boundary.
• 9. A guitar string fixed at both ends vibrates at its fundamental frequency. How
many antinodes are present?
A) 0
B) 1
C) 2
D) 3
• 10. An organ pipe that is open at one end and closed at the other produces its first
overtone. The length of the pipe is equal to:
A) 1/2 wavelength
B) 1/4 wavelength
C) 3/4 wavelength
D) 1 wavelength
• 11. A pendulum has a period of 2 seconds on Earth. If taken to the Moon where
gravity is 1/6th that of Earth, its period will be:
A) 0.33 s
B) 0.82 s
C) 4.90 s
D) 12.0 s
• 12. A wave transfers:
A) Mass
B) Energy
the Exam (), 100% Verified
PHYS 165 - Module 8 Exam: Oscillations, Waves, & Sound
• Instructions: Choose the single best answer for each question. You have 60 minutes to
complete this exam.
• 1. A mass-spring system oscillates with a period T. If the mass is doubled and the
spring constant is halved, what is the new period?
A) T/2
B) T
C) 2T
D) 4T
• 2. The frequency of a simple pendulum depends on which of the following?
A) Mass of the bob
B) Amplitude of the swing (for small angles)
C) Length of the pendulum
D) The density of the bob material
• 3. A wave on a string is described by the equation y(x, t) = 0.05 sin(4x - 20t), where
x and y are in meters and t is in seconds. What is the speed of the wave?
A) 5 m/s
B) 16 m/s
C) 80 m/s
D) 0.2 m/s
• 4. In a transverse wave, the particles of the medium move:
A) In the same direction as the wave propagation.
B) Perpendicular to the direction of wave propagation.
C) In circles.
D) Randomly without any net direction.
• 5. What is the phase difference between two points that are exactly one full
wavelength apart on a traveling wave?
A) 0 radians
B) π/2 radians
C) π radians
D) 2π radians
, • 6. The speed of sound in air is approximately 343 m/s. If a sound wave has a
frequency of 686 Hz, what is its wavelength?
A) 0.5 m
B) 2.0 m
C) 343 m
D) 235,298 m
• 7. Two sound waves with frequencies of 440 Hz and 444 Hz are played
simultaneously. How many beats per second will be heard?
A) 2 Hz
B) 4 Hz
C) 442 Hz
D) 884 Hz
• 8. Standing waves are created by the interference of:
A) Two waves of different frequencies traveling in the same direction.
B) Two waves of the same frequency and amplitude traveling in opposite directions.
C) Two waves of different amplitudes traveling in opposite directions.
D) Refraction at a boundary.
• 9. A guitar string fixed at both ends vibrates at its fundamental frequency. How
many antinodes are present?
A) 0
B) 1
C) 2
D) 3
• 10. An organ pipe that is open at one end and closed at the other produces its first
overtone. The length of the pipe is equal to:
A) 1/2 wavelength
B) 1/4 wavelength
C) 3/4 wavelength
D) 1 wavelength
• 11. A pendulum has a period of 2 seconds on Earth. If taken to the Moon where
gravity is 1/6th that of Earth, its period will be:
A) 0.33 s
B) 0.82 s
C) 4.90 s
D) 12.0 s
• 12. A wave transfers:
A) Mass
B) Energy
