Applications of Sound Waves
Physics ⇒ Waves and Sound
Applications of Sound Waves starts at 9 and continues till grade 12.
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See sample questions for grade 12
A bat emits a sound at 40 kHz and hears the echo after 0.02 seconds. If the speed of sound in air is 340 m/s, how far away is the object?
A doctor uses Doppler ultrasound to measure the speed of blood flow in an artery. If the emitted frequency is 5 MHz and the observed frequency shift is 2 kHz, what is the speed of blood flow? (Assume speed of sound in tissue is 1540 m/s.)
A ship uses sonar to detect the ocean floor. If the speed of sound in seawater is 1500 m/s and the echo returns after 4 seconds, what is the depth of the ocean at that point?
A submarine emits a sonar pulse and receives the echo after 6 seconds. If the speed of sound in water is 1500 m/s, calculate the distance to the object.
Describe how sound waves are used in fish finders to detect the presence of fish underwater.
Describe how sound waves are used in non-destructive testing of materials.
Describe how the Doppler effect is used in speed detection by police radar guns.
Describe one industrial application of ultrasound and explain how it works.
Explain how echolocation is used by bats to navigate and find food.
Explain the principle behind the use of ultrasound in cleaning delicate objects.
Explain why sound waves cannot travel through a vacuum and discuss its implications for space communication.
Explain why ultrasound is preferred over X-rays for imaging soft tissues in the human body.
