Sound Waves Practice
10 problems · instant feedback · full explanations
Sound is a longitudinal pressure wave. Speed depends on the medium, pitch on frequency, loudness on intensity — keep those pairings straight.
Q1.
Which of these CANNOT travel through a vacuum?
Multiple choice · Easy
Q2.
A 440 Hz tuning fork produces sound with wavelength 0.78 m in air. What is the speed of sound?
Numerical answer (m/s) · Easy
Q3.
A 60 dB sound compared to a 40 dB sound has what intensity ratio?
Multiple choice · Medium
Q4.
A subwoofer vibrates at 2 Hz. What is the period of the sound wave?
Numerical answer (s) · Medium
Q5.
Which property of a sound wave determines its pitch?
Multiple choice · Medium
Q6.
An echo returns 1.72 s after a shout toward a cliff. How far away is the cliff? (Use v = 343 m/s.)
Numerical answer (m) · Hard
Q7.
The speed of sound in air increases as air temperature rises.
True / False · Easy
Q8.
Ultrasound refers to very loud audible sound.
True / False · Medium
Q9.
A pipe 0.5 m long is closed at one end. What is its fundamental frequency? (Use v = 340 m/s.)
Numerical answer (Hz) · Hard
Q10.
Bats hunt insects in total darkness primarily by:
Multiple choice · Hard