Production, propagation, reflection, echo, ultrasound, range of hearing.
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Q1 · Sound · MEDIUM
A student standing in front of a cliff claps his hands and hears an echo after 3 seconds. If the speed of sound in air is 340 m/s, what is the distance of the cliff from the student?
Q2 · Sound · EASY
Which of the following frequencies can be heard by a normal human ear?
Q3 · Sound · HARD
A ship on the ocean surface uses sonar to detect a submarine below it. The ship sends an ultrasonic pulse which returns after 4 seconds. If the speed of sound in seawater is 1500 m/s, and the ultrasound pulse gets reflected twice (once from the submarine and once from the ocean floor before returning), what is the depth of the ocean floor? Assume the submarine is at half the depth of the ocean floor.
Q4 · Sound · EASY
A sound wave travels in air at 340 m/s. If the frequency of the sound is 170 Hz, what is the wavelength of the sound wave?
Q5 · Sound · MEDIUM
A sound wave travels through air at 340 m/s and has a wavelength of 0.68 m. What is the frequency of this sound wave?