Please select a subject first
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Fill in the blank with suitable word :
Loudness of sound depends on .....................
Concept: undefined >> undefined
Fill in the blank with suitable word :
Quality of sound depends on ........................
Concept: undefined >> undefined
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What is meant by the 'loudness' of sound ? On what factor does the loudness of a sound depend ?
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Draw labelled diagrams to represent (a) soft sound, and (b) loud sound, of the same frequency.
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Explain the term 'pitch' of a sound. On what factor does the 'pitch' of a sound depend ?
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Draw labelled diagrams to represent sound of (a) low pitch, and (b) high pitch, of the same loudness.
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What is meant by the quality (or timbre) of sound ? On what factor does the quality (or timbre) of a sound depend ?
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Explain why, if we strike a table lightly, we hear a soft sound but if we hit the table hard, a loud sound is heard.
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Give one use of ultrasound in industry and one in hospitals.
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How is it that bats are able to fly at night without colliding with other objects ?
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Explain how, bats use ultrasound to catch the prey.
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Explain how, flaws (or defects) in a metal block can be detected by using ultrasound.
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What is the range of frequencies associated with (a) infrasound (b) audible sound, and (c) ultrasound ?
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The atomicities of ozone, sulphur, phosphorus and argon are respectively :
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Write any three applications (or uses) of ultrasound.
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Define the following terms : (a) Echolocation (b) Echocardiography, and (c) Ultrasonography.
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Name an animal which navigates and finds food by ecolocation.
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Which of the two produces ultrasonic waves : porpoise or whale ?
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A sonar station picks up a return signal after 3 seconds. How far away is the object ? (Speed of sound in water = 1440 m/s).
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